A pulley hoisting device and a crawler crane

Abstract

The present invention discloses a pulley hoisting device and a crawler crane, which include a boom head pulley mechanism, a hook pulley mechanism, and a hook mechanism connected to the hook pulley mechanism; the boom head pulley mechanism includes one or more boom head pulley group units arranged in parallel, and the boom head pulley group unit includes a first longitudinal pulley group and a first transverse pulley group connected up and down; the hook pulley mechanism includes one or more hook pulley group units arranged in parallel, and the hook pulley group unit includes a second transverse pulley group and a second longitudinal pulley group connected up and down; each boom head pulley group unit and hook pulley group unit are correspondingly arranged. The present invention can shorten the lateral length of the device, meet the construction requirements of a smaller space; can bear a greater load; can reduce the bending moment of the pulley shaft, thereby reducing the diameter of the pulley shaft; can reduce the tension of the steel wire rope, thereby reducing the diameter of the steel wire rope.

Description

Technical Field

[0001] The present invention belongs to the technical field of pulley blocks, and particularly relates to a pulley hoisting device and a crawler crane. Background Art

[0002] A crawler crane is a truss boom structure crane with a crawler walking chassis. During the hoisting process of a crawler crane, various different operating conditions will be encountered. When the customer's required hoisting load changes over a relatively large range, a large wire rope ratio is required, and the number of hook pulleys is relatively large. When the construction space is limited and it is necessary to lower and raise the hook in a narrow space to lift heavy objects, it is necessary to reduce the volume of the pulley block by reducing the number of pulleys, which will cause the problem of a small hoisting load.

[0003] All the pulleys of the existing hook pulley block of a crawler crane are arranged longitudinally side by side, and all the pulleys of the boom head pulley block are also arranged longitudinally side by side. The wire rope passes through the boom head pulley block and the hook pulley block to form a heavy object lifting system to realize the lifting of heavy objects. The overall width of the existing boom head pulley block and hook pulley block is wide and cannot meet the situation of special narrow spaces; in the case of a large number of pulleys, a large bending moment is generated on the pulley shaft, the overall force is limited, and it is necessary to increase the diameter of the pulley shaft to meet requirements such as strength and stiffness, and the boom head structure will also become wider and larger to a certain extent, increasing the cost. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a pulley hoisting device and a crawler crane, which can shorten the lateral length of the device, meet the construction requirements of a smaller space; can bear a greater load; can reduce the bending moment of the pulley shaft, and thus reduce the diameter of the pulley shaft; can reduce the tension of the wire rope, and thus reduce the diameter of the wire rope.

[0005] The present invention provides the following technical solutions:

[0006] In the first aspect, a pulley hoisting device is provided, including a boom head pulley mechanism, a hook pulley mechanism, and a hook mechanism connected to the hook pulley mechanism;

[0007] The boom head pulley mechanism includes one or more boom head pulley group units arranged in parallel, and each boom head pulley group unit includes a first longitudinal pulley group and a first transverse pulley group connected up and down;

[0008] The hook pulley mechanism includes one or more hook pulley group units arranged in parallel, and each hook pulley group unit includes a second transverse pulley group and a second longitudinal pulley group connected up and down;

[0009] Each arm head pulley block unit and the hook pulley block unit are correspondingly arranged. Each first longitudinal pulley block and the second longitudinal pulley block are correspondingly arranged and connected by a longitudinal wire rope. Each first transverse pulley block and the second transverse pulley block are correspondingly arranged and connected by a transverse wire rope.

[0010] Furthermore, the width of the first transverse pulley block is smaller than the rope winding diameter of the first longitudinal pulley block, and the width of the second transverse pulley block is smaller than the rope winding diameter of the second longitudinal pulley block.

[0011] Furthermore, the first longitudinal pulley block includes a first support beam, a first longitudinal mounting plate, a first longitudinal pulley shaft, and first longitudinal pulleys. The first support beam is connected with a plurality of first longitudinal mounting plates. The first longitudinal mounting plates are penetrated by the first longitudinal pulley shaft. A plurality of first longitudinal pulleys are installed outside the first longitudinal pulley shaft. The first longitudinal pulleys at both ends of the first longitudinal pulley shaft are fixed by first longitudinal baffles.

[0012] Furthermore, the first transverse pulley block includes a first transverse mounting plate, a first transverse pulley shaft, and first transverse pulleys. The first transverse mounting plate is connected with a first pin ear plate. The first pin ear plate is connected with the first longitudinal mounting plate through a first pin. The first transverse mounting plate is penetrated by the first transverse pulley shaft. A plurality of first transverse pulleys are installed outside the first transverse pulley shaft. The first transverse pulleys at both ends of the first transverse pulley shaft are fixed by first transverse baffles.

[0013] Furthermore, the second longitudinal pulley block includes a second support beam, a second longitudinal mounting plate, a second longitudinal pulley shaft, and second longitudinal pulleys. Two support plates are connected to one side of the second support beam, and a plurality of second longitudinal mounting plates are connected to the other side. The second longitudinal mounting plates are penetrated by the second longitudinal pulley shaft. A plurality of second longitudinal pulleys are installed outside the second longitudinal pulley shaft. The second longitudinal pulleys at both ends of the second longitudinal pulley shaft are fixed by second longitudinal baffles.

[0014] Furthermore, the second transverse pulley block includes a second transverse mounting plate, a second transverse pulley shaft, and second transverse pulleys. The second transverse mounting plate is connected with a second pin ear plate. The second pin ear plate is connected with the second longitudinal mounting plate through a second pin. The second transverse mounting plate is penetrated by the second transverse pulley shaft. A plurality of second transverse pulleys are installed outside the second transverse pulley shaft. The second transverse pulleys at both ends of the second transverse pulley shaft are fixed by second transverse baffles.

[0015] Further, the hook mechanism includes a hook beam, a hook shaft vertically connected to the hook beam, and a plurality of hook bodies connected to the end of the hook shaft; a support ring is provided outside the hook shaft, and a shielding piece corresponding to the position of the hook body is hinged to the support ring, and the shielding piece is used to shield the opening of the hook body.

[0016] Further, when the number of the boom head pulley unit and the hook pulley unit is 1, the hook beam is installed on the support plate of the second longitudinal pulley group.

[0017] Further, when the number of the boom head pulley unit and the hook pulley unit is greater than or equal to 2, a parallel plate is connected to the support plates of each second longitudinal pulley group, and the hook beam is installed on the parallel plate.

[0018] In a second aspect, a crawler crane is provided, including the pulley hoisting device described in the first aspect.

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

[0020] The boom head pulley unit in the present invention includes a first longitudinal pulley group and a first transverse pulley group connected up and down, and the hook pulley unit includes a second transverse pulley group and a second longitudinal pulley group connected up and down; compared with the existing device, when the load capacity is certain, the present invention can shorten the lateral length of the device, meet the construction requirements of a smaller space, and at the same time can also shorten the length of the pulley shaft, reduce the bending moment of the pulley shaft, and to a certain extent can reduce the diameter of the pulley shaft, thereby reducing the production cost; when the boom head width and the pulley ratio are certain, when bearing the same load capacity, the present invention can reduce the tension of the steel wire rope and the diameter of the steel wire rope, and when using the same steel wire rope, the present invention can bear a greater load capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a front view structural schematic diagram of the boom head pulley unit in an embodiment of the present invention;

[0022] Figure 2 is a side view structural schematic diagram of the boom head pulley unit in an embodiment of the present invention;

[0023] Figure 3 is a front view structural schematic diagram of the hook pulley unit and the hook mechanism in an embodiment of the present invention;

[0024] Figure 4 is a side view structural schematic diagram of the hook pulley unit and the hook mechanism in an embodiment of the present invention;

[0025] Figure 5 is a front view structural schematic diagram of the double hook pulley unit in Embodiment 2 of the present invention;

[0026] Figure 6 It is a schematic side view structure diagram of the double-hook pulley group unit in Embodiment 2 of the present invention;

[0027] In the figure, the markings are: 1. First support beam; 2. First longitudinal mounting plate; 3. First longitudinal pulley shaft; 4. First longitudinal pulley; 5. First longitudinal baffle; 6. First transverse mounting plate; 7. First pin shaft; 8. First pin shaft ear plate; 9. First transverse baffle; 10. First boom hinge ear; 11. Second boom hinge ear; 12. First transverse pulley; 13. First transverse pulley shaft; 14. Support ring; 15. Second transverse mounting plate; 16. Second longitudinal pulley; 17. Second transverse baffle; 18. Second transverse pulley; 19. Second transverse pulley shaft; 20. Second pin shaft ear plate; 21. Second pin shaft; 22. Second support beam; 23. Second longitudinal mounting plate; 24. Second longitudinal pulley shaft; 25. Second longitudinal baffle; 26. Support plate; 27. Hook shaft; 28. Hook body; 29. Hook beam; 30. Shading piece; 31. First longitudinal pulley group; 32. First transverse pulley group; 33. Second transverse pulley group; 34. Second longitudinal pulley group; 35. Parallel shaft; 36. Parallel plate. Detailed implementation manners

[0028] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0029] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "up", "down", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and does not require the present invention to be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present invention.

[0030] Embodiment 1

[0031] As Figures 1-4 shown, this embodiment provides a pulley hoisting device, including a boom head pulley mechanism, a hook pulley mechanism, and a hook mechanism connected to the hook pulley mechanism.

[0032] As Figures 1-4 shown, the boom head pulley mechanism includes 1 boom head pulley group unit, and the boom head pulley group unit includes a first longitudinal pulley group 31 and a first transverse pulley group 32 connected up and down.

[0033] As Figure 1 and Figure 2As shown in the figure, the first longitudinal pulley group 31 includes a first support beam 1, a first longitudinal mounting plate 2, a first longitudinal pulley shaft 3, and first longitudinal pulleys 4. The first support beam 1 is connected with a plurality of first longitudinal mounting plates 2. The first longitudinal pulley shaft 3 penetrates through the first longitudinal mounting plate 2, and a plurality of first longitudinal pulleys 4 are installed outside the first longitudinal pulley shaft 3. The first longitudinal pulleys 4 at both ends of the first longitudinal pulley shaft 3 are fixed by a first longitudinal baffle 5. The first support beam 1 is also connected with a first boom hinge ear 10 and a second boom hinge ear 11 for installing the boom head pulley group unit on the boom.

[0034] As Figure 1 and Figure 2 shown in the figure, the first transverse pulley group 32 includes a first transverse mounting plate 6, a first transverse pulley shaft 13, and first transverse pulleys 12. The first transverse mounting plate 6 is connected with a first pin ear plate 8. The first pin ear plate 8 is connected with the first longitudinal mounting plate 2 through a first pin 7. The first transverse pulley shaft 13 penetrates through the first transverse mounting plate 9, and a plurality of first transverse pulleys 12 are installed outside the first transverse pulley shaft 13. The first transverse pulleys 12 at both ends of the first transverse pulley shaft 13 are fixed by a first transverse baffle 9.

[0035] As Figures 1-4 shown in the figure, the hook pulley mechanism includes one hook pulley group unit. The hook pulley group unit includes a second transverse pulley group 33 and a second longitudinal pulley group 34 connected up and down.

[0036] As Figure 3 and Figure 4 shown in the figure, the second longitudinal pulley group 34 includes a second support beam 22, a second longitudinal mounting plate 23, a second longitudinal pulley shaft 24, and second longitudinal pulleys 16. Two support plates 26 are connected to one side of the second support beam 22, and a plurality of second longitudinal mounting plates 23 are connected to the other side. The second longitudinal pulley shaft 24 penetrates through the second longitudinal mounting plate 23, and a plurality of second longitudinal pulleys 16 are installed outside the second longitudinal pulley shaft 24. The second longitudinal pulleys 16 at both ends of the second longitudinal pulley shaft 24 are fixed by a second longitudinal baffle 25;

[0037] As Figure 3 and Figure 4 shown in the figure, the second transverse pulley group 33 includes a second transverse mounting plate 15, a second transverse pulley shaft 19, and second transverse pulleys 18. The second transverse mounting plate 15 is connected with a second pin ear plate 20. The second pin ear plate 20 is connected with the second longitudinal mounting plate 23 through a second pin 21. The second transverse pulley shaft 19 penetrates through the second transverse mounting plate 15, and a plurality of second transverse pulleys 18 are installed outside the second transverse pulley shaft 19. The second transverse pulleys 18 at both ends of the second transverse pulley shaft 19 are fixed by a second transverse baffle 17.

[0038] The boom head pulley block unit and the hook pulley block unit are arranged correspondingly. The first longitudinal pulley block 31 and the second longitudinal pulley block 34 are arranged correspondingly and connected by a longitudinal steel wire rope. The first transverse pulley block 32 and the second transverse pulley block 33 are arranged correspondingly and connected by a transverse steel wire rope, forming a complete pulley hoisting device. The width of the first transverse pulley block 32 is smaller than the rope winding diameter of the first longitudinal pulley block 31, and the width of the second transverse pulley block 33 is smaller than the rope winding diameter of the second longitudinal pulley block 34. This design makes the longitudinal steel wire rope on the outside and the transverse steel wire rope on the inside, and the two do not interfere with each other. Reasonably arranging the interaction positions of the longitudinal steel wire rope and the transverse steel wire rope or adding a steering pulley can ensure the rope inlet angle and the rope outlet angle of the steel wire rope.

[0039] As Figure 3 and Figure 4 shown, the hook mechanism includes a hook beam 29 installed on a support plate 26, a hook shaft 27 perpendicularly connected to the hook beam 29, and a plurality of hook bodies 28 connected to the end of the hook shaft 27; a support ring 14 is provided outside the hook shaft 27, and a shielding piece 30 corresponding to the position of the hook body 28 is hinged to the support ring 14. The shielding piece 30 is used to shield the opening of the hook body 28, which helps to improve the safety of loading.

[0040] Embodiment 2

[0041] This embodiment provides a pulley hoisting device, which is different from that of Embodiment 1 in that the boom head pulley mechanism includes a plurality of boom head pulley block units arranged in parallel, and the hook pulley mechanism includes a plurality of hook pulley block units arranged in parallel. As Figure 5 and Figure 6 shown, taking 2 hook pulley block units as an example, the second support beams 22 of each second longitudinal pulley block are connected by a parallel shaft 35 to form a stable structure; a parallel plate 36 is connected to the support plate 26 of each second longitudinal pulley block, and the hook beam 29 of the hook mechanism is installed on the parallel plate 36.

[0042] In Embodiment 1 and Embodiment 2, the first longitudinal pulley block 31 and the first transverse pulley block 32 are connected by a first pin shaft 7, and the second longitudinal pulley block 34 and the second transverse pulley block 33 are connected by a second pin shaft 21, both of which are single pin shaft connections and can rotate relative to each other. In other embodiments, four pin shaft connections can also be used to reduce relative rotation. The connection form is not limited, but it needs to be arranged up and down and does not necessarily need to be centered, which can be determined according to the actual force situation to ensure the balance of force.

[0043] In Embodiment 1 and Embodiment 2, since the first longitudinal pulley group 31 and the first transverse pulley group 32 are connected by the first pin shaft 7, and the second longitudinal pulley group 34 and the second transverse pulley group 33 are connected by the second pin shaft 21, the structure is convenient for disassembly and assembly, and it is convenient to increase or decrease the pulleys to realize the conversion of the pulley ratio. In other embodiments, the first longitudinal pulley group and the first transverse pulley group, as well as the second longitudinal pulley group and the second transverse pulley group, can also be connected by welding.

[0044] Compared with the existing device, when the load capacity is certain, the pulley hoisting device provided by the present invention can shorten the transverse length of the device, meet the construction requirements of a smaller space, and at the same time can also shorten the length of the pulley shaft, reduce the bending moment of the pulley shaft, and to a certain extent, the diameter of the pulley shaft can be reduced, thereby reducing the production cost; when the width of the boom head and the pulley ratio are certain and the same load capacity is borne, the present invention can reduce the tension of the steel wire rope and the diameter of the steel wire rope. When the same steel wire rope is used, the present invention can bear a greater load capacity.

[0045] Embodiment 3

[0046] This embodiment provides a crawler crane equipped with the pulley hoisting device described in any one of the foregoing embodiments.

[0047] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A pulley hoisting device, characterized in that It includes a boom head pulley mechanism, a hook pulley mechanism, and a hook mechanism connected to the hook pulley mechanism; The boom head pulley mechanism includes one or more boom head pulley group units arranged in parallel. The boom head pulley group unit includes a first longitudinal pulley group and a first transverse pulley group connected up and down; The hook pulley mechanism includes one or more hook pulley group units arranged in parallel. The hook pulley group unit includes a second transverse pulley group and a second longitudinal pulley group connected up and down; Each boom head pulley group unit and hook pulley group unit are correspondingly arranged. Each first longitudinal pulley group and second longitudinal pulley group are correspondingly arranged and connected by a longitudinal steel wire rope. Each first transverse pulley group and second transverse pulley group are correspondingly arranged and connected by a transverse steel wire rope; The width of the first transverse pulley group is less than the rope winding diameter of the first longitudinal pulley group, and the width of the second transverse pulley group is less than the rope winding diameter of the second longitudinal pulley group; The first longitudinal pulley group includes a first support beam, a first longitudinal mounting plate, a first longitudinal pulley shaft, and first longitudinal pulleys. The first support beam is connected with a number of first longitudinal mounting plates. The first longitudinal mounting plates are penetrated by the first longitudinal pulley shaft, and a number of first longitudinal pulleys are installed outside the first longitudinal pulley shaft; The first transverse pulley group includes a first transverse mounting plate, a first transverse pulley shaft, and first transverse pulleys. The first transverse mounting plate is connected with a first pin ear plate. The first pin ear plate is connected to the first longitudinal mounting plate through a first pin. The first transverse mounting plate is penetrated by the first transverse pulley shaft, and a number of first transverse pulleys are installed outside the first transverse pulley shaft; 2. The pulley hoisting device according to claim 1, characterized in that, The first longitudinal pulleys at both ends of the first longitudinal pulley shaft are fixed by first longitudinal baffles.

3. The pulley hoisting device according to claim 2, characterized in that, The first transverse pulleys at both ends of the first transverse pulley shaft are fixed by first transverse baffles.

4. The pulley hoisting device according to claim 1, characterized in that, The second longitudinal pulley group includes a second support beam, a second longitudinal mounting plate, a second longitudinal pulley shaft, and second longitudinal pulleys. Two support plates are connected to one side of the second support beam, and a number of second longitudinal mounting plates are connected to the other side. The second longitudinal mounting plates are penetrated by the second longitudinal pulley shaft, and a number of second longitudinal pulleys are installed outside the second longitudinal pulley shaft. The second longitudinal pulleys at both ends of the second longitudinal pulley shaft are fixed by second longitudinal baffles; 5. The pulley hoisting device according to claim 4, characterized in that, The second transverse pulley group includes a second transverse mounting plate, a second transverse pulley shaft, and second transverse pulleys. The second transverse mounting plate is connected with a second pin ear plate. The second pin ear plate is connected to the second longitudinal mounting plate through a second pin. The second transverse mounting plate is penetrated by the second transverse pulley shaft, and a number of second transverse pulleys are installed outside the second transverse pulley shaft. The second transverse pulleys at both ends of the second transverse pulley shaft are fixed by second transverse baffles; 6. The pulley hoisting device according to claim 4, wherein, The hook mechanism includes a hook beam, a hook shaft vertically connected to the hook beam, and a number of hook bodies connected to the end of the hook shaft; a support ring is arranged outside the hook shaft, and a shielding piece corresponding to the position of the hook body is hinged to the support ring. The shielding piece is used to shield the opening of the hook body.

7. The pulley hoisting device according to claim 6, characterized in that, When the number of the boom head pulley block unit and the hook pulley block unit is 1, the hook beam is installed on the support plate of the second longitudinal pulley block.

8. The pulley hoisting device according to claim 6, wherein, When the number of the boom head pulley block unit and the hook pulley block unit is greater than or equal to 2, a parallel plate is connected to the support plate of each second longitudinal pulley block, and the hook beam is installed on the parallel plate.

9. A crawler crane, characterized in that, It includes the pulley hoisting device according to any one of claims 1 to 8.

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