A double pulley transition guiding mechanism and a lifting device

Abstract

The present invention discloses a double pulley transition guiding mechanism and a hoisting device, which include a connecting frame, a first guiding component, and a second guiding component; the connecting frame is installed between the main boom and the auxiliary boom, the first guiding component is installed on the connecting frame, and the second guiding component is installed on the auxiliary boom; when the auxiliary boom is in the working state, the first guiding component and the second guiding component are vertically and coaxially assembled relative to the auxiliary boom; when the auxiliary boom is in the folded state, the first guiding component and the second guiding component are horizontally assembled in a direction perpendicular to the axis of the auxiliary boom and the assembly directions are opposite. The first guiding component and the second guiding component of the present invention are small in size, reducing the risk of interference between the wire rope and the main boom or the auxiliary boom when the auxiliary boom is in the working state, and facilitating the improvement of the lightweight level; the first guiding component and the second guiding component are horizontally assembled and the assembly directions are opposite when the auxiliary boom is in the folded state, which not only reduces the occupied space but also has the function of winding the rope, improving the operation convenience.

Description

Technical Field

[0001] The present invention belongs to the technical field of lifting devices, and particularly relates to a double-pulley transition guiding mechanism and a lifting device. Background Art

[0002] The structure of a crane includes a main boom and a jib. The jib plays an important role in extending the lifting height, expanding the working range, and improving the working efficiency. The jib has two states: a working state and a folded and suspended state.

[0003] As Figure 1 shown, the jib 2 is in the working state, and at this time, the jib 2 is fixed to the boom head of the main boom 1. In the prior art, the steel wire rope 8 released by the hoisting equipment 4 sequentially bypasses the guiding pulley 3 and the end pulley 6. The guiding pulley 3 is installed on the connecting frame through the guiding pulley bracket 5, and it is large in size and not conducive to lightweight. During the operation, the sliding friction between the steel wire rope and other components, especially metal parts, will cause wear of the steel wire rope, reduce its service life, and increase the accident risk at the same time; because in the working condition of using the jib, the overall working condition distance is long, and the boom will deflect under its own weight and the weight of the goods, and the deflection amount at the end of the jib is the largest, there is a risk of interference between the steel wire rope and the main boom or the jib itself. When the luffing angle of the main boom decreases, the possibility of interference will increase significantly; in addition, the installation angle between the jib and the main boom is not fixed either. When the installation angle of the jib increases, the possibility of interference will also increase. In order to reduce interference, the following methods are usually adopted to increase the included angle between the steel wire rope and the transverse plane of the jib:

[0004] 1) Raise the upper edge of the guiding pulley, which is achieved by increasing the diameter of the guiding pulley and increasing the height of the guiding pulley bracket. However, increasing the diameter of the guiding pulley often requires synchronously increasing the height of the guiding pulley bracket. However, since the existing guiding pulley switches the assembly state in the longitudinal direction (i.e., in the plane parallel to the axis of the jib) to adapt to the jib in the working state and the folded state, and the design space of the jib is limited, it is difficult to implement the method of increasing the diameter of the guiding pulley and increasing the height of the guiding pulley bracket, and the design of longitudinal switching assembly is not applicable to the jib with a small cross-section;

[0005] 2) Lower the upper edge of the end pulley, which is achieved by reducing the diameter of the end pulley and lowering the height of the center of the end pulley. In actual production, the operable space for both the diameter of the end pulley and the height of the center of the end pulley is small;

[0006] 3) Shorten the distance between the guiding pulley and the end pulley, but the adjustable range of a single guiding pulley is small due to the influence of the product structure.

[0007] As Figure 2As shown in the figure, when the auxiliary boom 2 is in the folded and suspended state, the auxiliary boom 2 is fixed to the side of the main boom 1, and it is necessary to use the guide rope frame 7 to transition the steel wire rope 8 to the auxiliary boom 2. The guiding pulley 3 is located at the rear of the guide rope frame 7. The steel wire rope 8 needs to be taken out from the guiding pulley 3 and then bypassed around the guide rope frame 7. When the auxiliary boom 2 switches to the working state, in addition to raising the guiding pulley bracket 5, the steel wire rope 8 also needs to be bypassed around the guiding pulley 3 again, which is troublesome to operate. Summary of the Invention

[0008] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a double-pulley transition guiding mechanism and a lifting device. The first guiding component and the second guiding component are small in size, reducing the risk of interference between the steel wire rope and the main boom or the auxiliary boom when the auxiliary boom is in the working state, and facilitating the improvement of the lightweight level; the first guiding component and the second guiding component are horizontally assembled and have opposite assembly directions when the auxiliary boom is in the folded state, which not only reduces the occupied space but also has the function of winding the rope, improving the operation convenience.

[0009] The present invention provides the following technical solutions:

[0010] In the first aspect, a double-pulley transition guiding mechanism is provided, including a connecting frame, a first guiding component, and a second guiding component;

[0011] The connecting frame is installed between the main boom and the auxiliary boom. The first guiding component is installed on the connecting frame, and the second guiding component is installed on the auxiliary boom;

[0012] When the auxiliary boom is in the working state, the first guiding component and the second guiding component are vertically and in the same direction assembled relative to the auxiliary boom; when the auxiliary boom is in the folded state, the first guiding component and the second guiding component are horizontally assembled in the direction perpendicular to the axis of the auxiliary boom and have opposite assembly directions.

[0013] Further, the connecting frame includes a main frame and a pull plate; one end of the main frame is hinged to the main boom, and the other end is hinged to the auxiliary boom; one end of the pull plate is connected to the main frame through a first hinge shaft, and the other end is connected to the auxiliary boom through a second hinge shaft.

[0014] Further, the structures of the first guiding component and the second guiding component are the same; the first guiding component includes a support, a bracket, and a pulley. The pulley is installed on the bracket, and the bracket can be vertically and horizontally assembled with the support. The support is welded to the connecting frame.

[0015] Further, the support is composed of a cross plate, a first vertical plate, and a second vertical plate that are perpendicularly connected to both sides of the cross plate. The first vertical plate and the second vertical plate are provided with first pin holes and second pin holes corresponding in position. The second vertical plate is also provided with a third pin hole. The straight line where the centers of the first pin hole and the second pin hole are located is perpendicular to the straight line where the centers of the first pin hole and the third pin hole are located.

[0016] Furthermore, the bracket includes a support block, a first support plate and a second support plate connected to both sides of the support block. The bracket and the support are connected by a first pin shaft passing through the first pin hole and the support block and a first pin clip matching the first pin shaft.

[0017] When the bracket and the support are vertically assembled, the bracket and the support are also connected by a second pin shaft passing through the third pin hole and the support block and a second pin clip matching the second pin shaft.

[0018] When the bracket and the support are horizontally assembled, the bracket and the support are also connected by a third pin shaft passing through the second pin hole and the support block and a third pin clip matching the third pin shaft.

[0019] Furthermore, a fifth pin shaft is connected between the ends of the first support plate and the second support plate, and the fifth pin shaft is fixed by a fifth pin clip.

[0020] Furthermore, the pulley is arranged between the first support plate and the second support plate, and the pulley is installed by a fourth pin shaft sequentially passing through the second support plate, the middle of the pulley and the first support plate and a fourth pin clip matching the fourth pin shaft.

[0021] Furthermore, a gasket sleeved on the outside of the fourth pin shaft is arranged between the first support plate and the fourth pin clip.

[0022] In a second aspect, a hoisting device is provided, including the double-pulley transition guiding mechanism described in the first aspect.

[0023] Furthermore, it further includes a main boom and a sub-boom. The main boom is equipped with a hoisting device, and the end of the sub-boom is equipped with an end pulley. The steel wire rope provided by the hoisting device sequentially bypasses the first guiding assembly, the second guiding assembly and the end pulley.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] (1) The present invention includes a connecting frame, a first guiding assembly installed on the connecting frame and a second guiding assembly installed on the sub-boom. When the sub-boom is in a working state, the first guiding assembly and the second guiding assembly are vertically and in the same direction assembled relative to the sub-boom, and can share the bearing pressure with each other. Therefore, the size can be reduced, thereby reducing the risk of interference between the steel wire rope and the main boom or the sub-boom, and at the same time, it is beneficial to improve the lightweight level.

[0026] (2) The present invention makes full use of the relatively wide spare space on the connecting frame and the upper part of the sub-boom to install the first guiding assembly and the second guiding assembly. When the sub-boom is in a folded state, the first guiding assembly and the second guiding assembly are horizontally assembled in the direction perpendicular to the axis of the sub-boom, occupying a small space, suitable for a sub-boom with a small cross-section, and there is no need to additionally increase the overall width of the sub-boom.

[0027] (3) When the auxiliary boom is in the folded state, the first guiding component and the second guiding component are assembled horizontally and in opposite assembly directions, and both have the function of winding the rope. The steel wire rope does not need to be taken out of the guiding component, so there is no need to set up a wire guiding frame, which saves costs and is convenient to operate. Description of the Drawings

[0028] Figure 1 is the front view structural schematic diagram of the pulley guiding mechanism in the prior art when the auxiliary boom is in the working state;

[0029] Figure 2 is the top view structural schematic diagram of the pulley guiding mechanism in the prior art when the auxiliary boom is in the folded state;

[0030] Figure 3 is the front view structural schematic diagram of the double-pulley transition guiding mechanism in the present invention when the auxiliary boom is in the working state;

[0031] Figure 4 is Figure 3 the structural schematic diagram of the partial part A in;

[0032] Figure 5 is Figure 3 the three-dimensional structural schematic diagram of the first guiding component in;

[0033] Figure 6 is Figure 5 the left view structural schematic diagram of the first guiding component in;

[0034] Figure 7 is Figure 5 the front view structural schematic diagram of the first guiding component in;

[0035] Figure 8 is the assembly structural schematic diagram of the first guiding component when the auxiliary boom is in the folded state;

[0036] Figure 9 is the top view structural schematic diagram of the double-pulley transition guiding mechanism in the present invention when the auxiliary boom is in the folded state;

[0037] Figure 10 is Figure 9 the structural schematic diagram of the partial part B in;

[0038] The labels in the figure are: 1, main boom; 2, auxiliary boom; 3, guide pulley; 4, hoisting equipment; 5, guide pulley bracket; 6, end pulley; 7, wire guide frame; 8, wire rope; 9, first guiding component; 901, first vertical plate; 902, cross plate; 903, second vertical plate; 904, first support plate; 905, support block; 906, second support plate; 907, second pin hole; 908, first pin shaft; 909, first pin clip; 910, second pin shaft; 911, second pin clip; 912, pulley; 913, fifth pin shaft; 914, fifth pin clip; 915, fourth pin shaft; 916, gasket; 917, fourth pin clip; 918, third pin hole; 919, third pin shaft; 920, third pin clip; 10, second guiding component; 11, connecting frame; 1101, main frame; 1102, pulling plate; 1103, first hinge shaft; 1104, second hinge shaft. Detailed implementation manners

[0039] 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 solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0040] 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", "inside", "outside", 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 of the present invention.

[0041] Embodiment 1

[0042] As Figure 3 and 9 shown, this embodiment provides a double-pulley transition guiding mechanism, including a connecting frame 11, a first guiding component 9 and a second guiding component 10; the connecting frame 11 is installed between the main boom 1 and the auxiliary boom 2, the first guiding component 9 is installed on the connecting frame 11, and the second guiding component 10 is installed on the auxiliary boom 2; when the auxiliary boom 2 is in the working state, the first guiding component 9 and the second guiding component 10 are vertically and in the same direction assembled relative to the auxiliary boom 2; when the auxiliary boom 2 is in the folded state, the first guiding component 9 and the second guiding component 10 are horizontally assembled in the direction perpendicular to the axis of the auxiliary boom 2 and the assembly directions are opposite.

[0043] As Figure 4 and 5 shown, the first guiding component 9 includes a support, a bracket and a pulley 912, the pulley 912 is installed on the bracket, the bracket can be vertically and horizontally assembled with the support, and the support is welded to the connecting frame 11.

[0044] As Figures 5-7As shown in the figure, the support is composed of a transverse plate 902, a first vertical plate 901 and a second vertical plate 903 that are vertically connected to both sides of the transverse plate 902. The first vertical plate 901 and the second vertical plate 903 are provided with a first pin hole and a second pin hole 907 corresponding in position. The second vertical plate 903 is further provided with a third pin hole 918. The straight line where the centers of the first pin hole and the second pin hole 907 are located is perpendicular to the straight line where the centers of the first pin hole and the third pin hole 918 are located. The bracket includes a support block 905, a first support plate 904 and a second support plate 906 connected to both sides of the support block 905. The bracket and the support are connected by a first pin shaft 908 passing through the first pin hole and the support block 905 and a first pin clip 909 matching the first pin shaft 908.

[0045] As Figures 5-7 shown, when the bracket is vertically assembled relative to the support, the bracket and the support are further connected by a second pin shaft 910 passing through the third pin hole 918 and the support block 905 and a second pin clip 911 matching the second pin shaft 910. That is, the installation of the first pin shaft 908 and the second pin shaft 910 realizes the fixed vertical assembly position of the bracket and the support, facilitating the wire rope guiding of the pulleys of the two guiding components. As Figure 8 shown, when the bracket is horizontally assembled relative to the support, the bracket and the support are further connected by a third pin shaft 919 passing through the second pin hole 907 and the support block 905 and a third pin clip 920 matching the third pin shaft 919. That is, the installation of the first pin shaft 908 and the third pin shaft 919 realizes the fixed horizontal assembly position of the bracket and the support, facilitating the adaptation to the folding state of the auxiliary boom.

[0046] As Figures 5-7 shown, a pulley 912 is arranged between the first support plate 904 and the second support plate 906. The pulley 912 is installed by a fourth pin shaft 915 passing through the second support plate 906, the middle of the pulley 912 and the first support plate 904 in sequence and a fourth pin clip 917 matching the fourth pin shaft 915. A gasket 916 sleeved outside the fourth pin shaft 915 is arranged between the first support plate 904 and the fourth pin clip 917. A fifth pin shaft 913 is connected between the ends of the first support plate 904 and the second support plate 906. The fifth pin shaft 913 is located outside the pulley 912 and fixed by a fifth pin clip 914. When the bracket is vertically assembled relative to the support, the fifth pin shaft 913 can limit the wire rope 8, reducing the risk of the wire rope 8 disengaging from the pulley 912; when the bracket is horizontally assembled relative to the support, the fifth pin shaft 913 has a rope winding function.

[0047] As Figure 3 、 4As shown in Figures 9 and 10, the structure of the second guiding assembly 10 is the same as that of the first guiding assembly 9. The support of the second guiding assembly 10 is welded to the secondary boom 2 and has the opposite installation direction to that of the support of the first guiding assembly 9. Therefore, when the bracket is assembled transversely relative to the support, the directions are also opposite, which is convenient for the wire rope 8 to wind, and there will be no interference between the first guiding assembly 9 and the second guiding assembly 10.

[0048] The working principle of this embodiment is as follows:

[0049] As Figures 3-7 shown, when the secondary boom 2 is in the working state, the brackets and pulleys of the first guiding assembly 9 and the second guiding assembly 10 are vertically upward assembled relative to the support. The wire rope 8 released by the hoisting equipment sequentially bypasses the pulley 912 of the first guiding assembly 9, the pulley of the second guiding assembly 10, and the end pulley 6 at the end of the secondary boom 2. The two pulleys can share the bearing pressure with each other. Therefore, compared with the guiding pulley in the prior art, the size can be reduced, thereby reducing the risk of interference between the wire rope 8 and the main boom 1 or the secondary boom 2. At the same time, it is beneficial to improve the lightweight level and reduce the installation operation intensity.

[0050] As Figures 8-10 shown, when the secondary boom 2 is in the folded state, the brackets and pulleys of the first guiding assembly 9 and the second guiding assembly 10 are transversely assembled relative to the support and the assembly directions are opposite. On the one hand, the occupied space is small, which is suitable for a secondary boom with a small cross-section and does not require an additional increase in the overall width of the secondary boom. On the other hand, the fifth pin shaft 913 of the first guiding assembly 9 and the pulley of the second guiding assembly 10 have the function of winding the rope. There is no need to recover the wire rope 8, nor is it necessary to set up a wire guiding frame, which saves costs, is convenient to operate, and reduces the height work.

[0051] Embodiment 2

[0052] This embodiment provides a double-pulley transition guiding mechanism, including the structure in Embodiment 1. In addition, as Figure 4 shown, the connecting frame 11 includes a main frame 1101 and a pull plate 1102; one end of the main frame 1101 is hinged to the main boom 1, and the other end is hinged to the secondary boom 2; one end of the pull plate 1102 is connected to the main frame 1101 through a first hinge shaft 1103, and the other end is connected to the secondary boom 2 through a second hinge shaft 1104. The pull plate 1102 can be set as a detachable structure. By replacing pull plates with different lengths, the requirements for different installation angles of the secondary boom can be met without replacing the connecting frame and the secondary boom as a whole; the pull plate 1102 can also be set as a length-adjustable structure, such as being composed of two mutually nested and relatively slidable pull plate sections. In this way, only by adjusting the length of the pull plate can the requirements for different installation angles of the secondary boom be met, which not only reduces the weight of the pull plate but also reduces the manufacturing difficulty.

[0053] Embodiment 3

[0054] This embodiment provides a lifting device configured with the double-pulley transition guiding mechanism described in Embodiment 1 or Embodiment 2. The lifting device further includes a main boom 1 and a sub-boom 2. A hoisting device is installed on the main boom 1, and an end pulley 6 is installed at the end of the sub-boom 2. The steel wire rope 8 provided by the hoisting device sequentially bypasses a first guiding assembly 9, a second guiding assembly 10, and the end pulley 6.

[0055] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A double pulley transition guiding mechanism, characterized in that It includes a connecting frame, a first guiding component and a second guiding component; The connecting frame is installed between the main boom and the auxiliary boom. The first guiding component is installed on the connecting frame, and the second guiding component is installed on the auxiliary boom. A hoisting device is installed on the main boom, and an end pulley is installed at the end of the auxiliary boom; The first guiding component and the second guiding component have the same structure. The first guiding component includes a support, a bracket and a pulley. The pulley is installed on the bracket, and the bracket can be vertically and horizontally assembled with the support. The bracket includes a support block, and a first support plate and a second support plate connected to both sides of the support block. A fifth pin shaft is connected between the ends of the first support plate and the second support plate; When the auxiliary boom is in the working state, the first guiding component and the second guiding component are vertically and in the same direction assembled relative to the auxiliary boom. The steel wire rope released by the hoisting device successively bypasses the pulley of the first guiding component, the pulley of the second guiding component and the end pulley at the end of the auxiliary boom. When the auxiliary boom is in the folded state, the first guiding component and the second guiding component are horizontally assembled in the direction perpendicular to the axis of the auxiliary boom and the assembly directions are opposite. The fifth pin shaft of the first guiding component and the pulley of the second guiding component have the function of winding the rope, and there is no need to recover the steel wire rope.

2. The double-pulley transition guiding mechanism according to claim 1, wherein The connecting frame includes a main frame and a pull plate; one end of the main frame is hinged to the main boom, and the other end is hinged to the auxiliary boom; one end of the pull plate is connected to the main frame through a first hinge shaft, and the other end is connected to the auxiliary boom through a second hinge shaft.

3. The double-pulley transition guiding mechanism according to claim 1, wherein The support is welded to the connecting frame.

4. The double pulley transition guiding mechanism according to claim 3, wherein The support is composed of a transverse plate, a first vertical plate and a second vertical plate vertically connected to both sides of the transverse plate. The first vertical plate and the second vertical plate are provided with a first pin hole and a second pin hole corresponding in position. The second vertical plate is also provided with a third pin hole. The straight line where the centers of the first pin hole and the second pin hole are located is perpendicular to the straight line where the centers of the first pin hole and the third pin hole are located.

5. The double pulley transition guiding mechanism according to claim 4, characterized in that, The bracket and the support are connected by a first pin shaft passing through the first pin hole and the support block and a first pin clip matching the first pin shaft; When the bracket is vertically assembled with the support, the bracket and the support are also connected by a second pin shaft passing through the third pin hole and the support block and a second pin clip matching the second pin shaft; When the bracket is horizontally assembled with the support, the bracket and the support are also connected by a third pin shaft passing through the second pin hole and the support block and a third pin clip matching the third pin shaft.

6. The double pulley transition guiding mechanism according to claim 5, characterized in that, The fifth pin shaft is fixed by a fifth pin clip.

7. The double pulley transition guiding mechanism according to claim 5, characterized in that, The pulley is arranged between the first support plate and the second support plate. The pulley is installed by a fourth pin shaft successively passing through the second support plate, the middle of the pulley and the first support plate and a fourth pin clip matching the fourth pin shaft.

8. The double-pulley transition guiding mechanism according to claim 7, wherein, A gasket sleeved on the outside of the fourth pin shaft is provided between the first support plate and the fourth pin clip.

9. A lifting device, characterized in that, It includes the double-pulley transition guiding mechanism according to any one of claims 1 to 8.

10. The lifting device according to claim 9, characterized in that, It further includes a main boom and an auxiliary boom. A hoisting device is installed on the main boom, and an end pulley is installed at the end of the auxiliary boom. The steel wire rope provided by the hoisting device successively bypasses the first guiding component, the second guiding component and the end pulley.

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