Anti-hanging protection device

Abstract

The utility model provides an anti-hitching protection device, which belongs to the technical field of quay cranes and comprises a pulley support and a lining support, the pulley support is sleeved outside the lining support, a shearing shaft is arranged on the upper portion of the lining support, the lining support is connected with the pulley support through the shearing shaft, and the shearing shaft is rotatably connected with the lining support. A pulley shaft is arranged on the lower portion of the lining support, and a pulley is rotationally connected to the pulley shaft. The device can be suitable for small quay cranes, does not need to add many additional parts, and is simple in structure and easier to maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of quay cranes, and particularly relates to an anti-hanging cabin protection device. Background Art

[0002] When a quay crane is working, the situation of hanging the cabin may occur. The so-called hanging the cabin means that when the quay crane grabs a container from a ship, the grabbed container is caught by other containers or the hull, resulting in the inability to normally grab the container. When hanging the cabin occurs, the grabbing force will become very large, which will cause damage to the quay crane and may even lead to accidents in severe cases.

[0003] Generally, large quay cranes are equipped with hydraulic hanging cabin protection devices, which protect the quay crane equipment through a hydraulic system when hanging the cabin occurs. Although the hydraulic hanging cabin protection device is reliable, it also has its own limitations. For example, 1. The self-weight of the whole system is relatively large (the hydraulic station, oil cylinder, support, platform, etc. weigh about 20 tons); 2. The hydraulic hanging cabin protection device occupies a large area and space; 3. The cost of the whole system is high.

[0004] The above points are not a problem for large quay cranes, but are not applicable to light and small quay cranes. If a hydraulic hanging cabin protection device is designed and used in a light and small quay crane, it will lead to many adverse factors such as an increase in the overall machine weight, an increase in the price of supporting parts, and insufficient space for the maintenance walkway.

[0005] The utility model patent with the publication number of CN207497933U provides a hanging cabin protection device, which connects the pulley bracket and the pulley connecting plate through a pull plate. When the hanging cabin phenomenon occurs, the pull plate is stressed and broken, and the energy generated when hanging the cabin is absorbed by the breakage of the pull plate.

[0006] Due to the strong wind on the shore, when the quay crane grabs goods, the goods will swing under the influence of the wind, resulting in relative swing between the pulley bracket and the pulley connecting plate, causing the pull plate to be repeatedly bent. When the pull plate reaches its fatigue strength due to long-term repeated bending, it will also break even without hanging the cabin, affecting normal use. Utility Model Content

[0007] Aiming at the defects or deficiencies in the prior art, the utility model provides an anti-hanging cabin protection device, which can be applied to small quay cranes, does not require adding many additional components, has a simple structure, and is easier to maintain.

[0008] To achieve the above purpose, the utility model adopts the following technical solutions:

[0009] An embodiment of the present utility model provides an anti-hanging cabin protection device, which includes a pulley bracket and a lining bracket. The pulley bracket is sleeved outside the lining bracket. A shear shaft is arranged on the upper part of the lining bracket. The lining bracket is connected to the pulley bracket through the shear shaft, and the shear shaft is rotatably connected to the lining bracket. A pulley shaft is arranged on the lower part of the lining bracket, and a pulley is rotatably connected to the pulley shaft.

[0010] Further, the longitudinal cross-sections of both the pulley bracket and the lining bracket are in the shape of 'n'.

[0011] Further, the shear shaft is perpendicular to the two side plates of the lining bracket and penetrates through the two side plates of the lining bracket.

[0012] Further, both ends of the shear shaft are respectively connected to the upper parts of the two side plates of the pulley bracket.

[0013] Further, the pulley shaft is parallel to the shear shaft and penetrates through the two side plates of the lining bracket.

[0014] Further, the pulley is located between the two side plates of the lining bracket, and a steel wire rope is wound around the pulley.

[0015] Further, chutes are arranged at the corresponding positions of the lower parts of the two side plates of the pulley bracket and the pulley shaft.

[0016] Further, the chute is oval and extends in the direction of the force of the steel wire rope.

[0017] Further, both ends of the pulley shaft are respectively located in the chutes.

[0018] Further, an induction switch is also arranged on the pulley bracket, and the induction switch is located on one side of the chute.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] 1. By arranging a lining bracket inside the pulley bracket and connecting the pulley bracket and the lining bracket through a shear shaft, when the hanging cabin phenomenon occurs in the quay crane, the shear shaft breaks, thereby triggering the hanging cabin protection. It can be applied to small quay cranes without adding many additional components, with a simple structure and easier maintenance.

[0021] 2. By connecting the pulley bracket and the lining bracket through a shear shaft, and the shear shaft is rotatably connected to the lining bracket. When the goods swing under the influence of wind force, the lining bracket will swing around the shear shaft, avoiding the situation of long-term repeated bending reaching its fatigue strength and causing fracture, and improving the reliability. Description of the Drawings

[0022] Figure 1Schematic diagram of the front structure of the anti-hanging cabin protection device in the embodiment of the present utility model;

[0023] Figure 2 Schematic diagram of the side structure of the anti-hanging cabin protection device in the embodiment of the present utility model;

[0024] Figure 3 Schematic diagram of the structure of the shear shaft in the embodiment of the present utility model;

[0025] Among them, 1. Pulley; 2. Steel wire rope; 3. Inductive switch; 4. Shear shaft; 5. Lining bracket; 6. Pulley shaft; 7. Pulley bracket; 8. Chute; 9. Shearing section. Specific implementation manners

[0026] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0027] A typical implementation manner of the present utility model is as Figure 1 and Figure 2 shown. An anti-hanging cabin protection device includes a pulley bracket 7 and a lining bracket 5. The longitudinal sections of both the pulley bracket 7 and the lining bracket 5 are in the shape of 'n'. The pulley bracket 7 is sleeved outside the lining bracket 5. A shear shaft 4 is arranged on the upper part of the lining bracket 5. The shear shaft 4 is perpendicular to the two side plates of the lining bracket 5, penetrates through the two side plates of the lining bracket 5, and is rotatably connected to the two side plates of the lining bracket 5.

[0028] Both ends of the shear shaft 4 are respectively connected to the upper parts of the two side plates of the pulley bracket 7, so that the lining bracket 5 and the pulley bracket 7 are connected through the shear shaft 4.

[0029] As Figure 3 shown, a shearing section 9 is arranged on the shear shaft 4 between the pulley bracket 7 and the lining bracket 5. The diameter of the shearing section 9 is smaller than the diameter of the shear shaft 4, so that the tensile force that the shearing section 9 can withstand is smaller than the tensile force that the shear shaft 4 can withstand. When the hanging cabin tensile force increases, the shear shaft 4 will break at the shearing section 9, thereby triggering the hanging cabin protection.

[0030] The pulley bracket 7 and the lining bracket 5 are connected through the shear shaft 4, and the shear shaft 4 is rotatably connected to the lining bracket 5. When the goods shake under the influence of wind, the lining bracket 5 will swing around the shear shaft 4, avoiding the situation of repeated bending for a long time until it reaches its fatigue strength and breaks, and improving the reliability.

[0031] A pulley shaft 6 is arranged at the lower part of the lining bracket 5. The pulley shaft 6 is arranged parallel to the shear shaft 4. The pulley shaft 6 penetrates through the two side plates of the lining bracket 5. A pulley 1 is rotatably connected to the pulley shaft 6. The pulley 1 is located between the two side plates of the lining bracket 5, and a steel wire rope 2 is wound around the pulley 1.

[0032] At the corresponding positions of the lower parts of the two side plates of the pulley bracket 7 with respect to the pulley shaft 6, chutes 8 are provided. The chutes 8 are oval-shaped and extend in the direction of the force applied by the steel wire rope 2. The two ends of the pulley shaft 6 are respectively located in the chutes 8.

[0033] The force applied by the steel wire rope 2 to the pulley 1 attempts to move the pulley 1 to one side. Since the shear shaft 4 is connected to the pulley bracket 7 and the shear shaft 4 is connected to the pulley shaft 6 through the inner lining bracket 5, due to the acting force of the steel wire rope 2, the inner lining bracket 5 also applies a force to the shear shaft 4 of the inner lining bracket 5. During normal operation, the force on the steel wire rope 2 is only the acting force of the container and the spreader, and this force is not sufficient to break the shear shaft 4. Therefore, the pulley shaft 6 has no displacement and is fixed on one side in the chute 8. When a snag occurs, in addition to the acting force of the container and the spreader, the force on the steel wire rope 2 also increases by an additional snag force. The increased force will break the shear shaft 4, so that the pulley shaft 6 will produce a lateral displacement in the chute 8, causing the pulley shaft 6 to move from one end of the chute 8 to the other end.

[0034] An induction switch 3 is also provided on the pulley bracket 7. The induction switch 3 is located on one side of the chute 8. During the process of the pulley shaft 6 moving from one end of the chute 8 to the other end, the induction switch 3 installed on the pulley bracket 7 is triggered, thereby stopping the further movement of the quay crane to prevent accidents from occurring.

[0035] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An anti-hanging cabin protection device, characterized in that, It includes a pulley bracket and a lining bracket. The pulley bracket is sleeved outside the lining bracket. A shear shaft is arranged at the upper part of the lining bracket. The lining bracket is connected to the pulley bracket through the shear shaft, and the shear shaft is rotatably connected to the lining bracket. A pulley shaft is arranged at the lower part of the lining bracket, and a pulley is rotatably connected to the pulley shaft.

2. The anti-hanging cabin protection device according to claim 1, characterized in that, The longitudinal sections of both the pulley bracket and the lining bracket are in the shape of 'n'.

3. The anti-hanging cabin protection device according to claim 1, characterized in that, The shear shaft is perpendicular to the two side plates of the lining bracket and penetrates through the two side plates of the lining bracket.

4. A hanging prevention cabin protection device according to claim 1, characterized in that, Both ends of the shear shaft are respectively connected to the upper parts of the two side plates of the pulley bracket.

5. The anti-hanging cabin protection device according to claim 1, characterized in that, The pulley shaft is parallel to the shear shaft and penetrates through the two side plates of the lining bracket.

6. The anti-hanging cabin protection device according to claim 1, wherein The pulley is located between the two side plates of the lining bracket, and a steel wire rope is wound around the pulley.

7. The anti-hanging cabin protection device according to claim 1, characterized in that Chutes are arranged at the corresponding positions of the lower parts of the two side plates of the pulley bracket and the pulley shaft.

8. The anti-hanging cabin protection device according to claim 7, characterized in that, The chutes are oval and extend in the direction of the force on the steel wire rope.

9. The anti-hanging cabin protection device according to claim 7, characterized in that, Both ends of the pulley shaft are respectively located in the chutes.

10. A protection device against hanging in a cabin according to claim 7, characterized in that, An induction switch is also arranged on the pulley bracket, and the induction switch is located on one side of the chute.

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