Hoisting equipment

Abstract

The present application relates to the field of engineering machinery, and discloses a hoisting device, wherein the hoisting device comprises a rotary table (10), a mast (20), a super-lifting device (30) and a supporting mechanism (40), the super-lifting device comprises a super-lifting mast (31) hinged to the rotary table, the mast is connected to the super-lifting mast through a first tension member (21), one end of the supporting mechanism is hinged to the end of the super-lifting mast, the supporting mechanism is connected to the mast and the super-lifting mast through a second tension member (41) and a third tension member (42) respectively, and the supporting mechanism is connected to the super-lifting mast through a pressure bearing member (43) to keep a fixed included angle between the supporting mechanism and the super-lifting mast, so that the supporting mechanism can bear pressure and be supported by the rotary table when bearing pressure. When no lifting or light lifting is performed, the weight of the super-lifting weight can be transmitted to the rotary table through the supporting mechanism, so that the super-lifting weight can be kept from falling to the ground, more working occasions can be adapted to, and the efficiency is improved.

Description

Technical Field

[0001] This invention relates to engineering machinery, and more specifically to lifting equipment. Background Technology

[0002] In existing technologies, when lifting equipment is in superlift mode, the tie plate between the mast and the superlift mast can be kept taut during lifting operations using the superlift counterweight. However, since the tie plate between the mast and the superlift mast can only bear tension and not compression, the superlift counterweight must be grounded after the load is unloaded to avoid overload failure. Therefore, when not lifting, on the one hand, there must be ground support behind the crane for the superlift counterweight, which restricts the working space and requires frequent grounding of the superlift counterweight; on the other hand, the superlift counterweight needs to be disassembled and stacked after each work cycle, resulting in low efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the problem in the prior art that the super-lift counterweight needs to be placed on the ground when it is not lifted or the load is light, and to provide a lifting device that can keep the super-lift counterweight from touching the ground.

[0004] To achieve the above objectives, the present invention provides a lifting device, wherein the lifting device includes a turntable, a mast, a super-lift device, and a support mechanism. The super-lift device includes a super-lift mast hinged to the turntable. The mast is connected to the super-lift mast via a first tension member. One end of the support mechanism is hinged to the end of the super-lift mast. The support mechanism is connected to the mast and the super-lift mast via a second tension member and a third tension member, respectively. The support mechanism is connected to the super-lift mast via a pressure-bearing member, so that the support mechanism and the super-lift mast maintain a fixed angle, thereby enabling the support mechanism to bear pressure and be supported by the turntable when under pressure.

[0005] Optionally, the support mechanism is a truss structure to withstand pressure along the extension direction of the truss structure, and the first tension member is a first tension plate arranged through the truss structure.

[0006] Optionally, the second tension member and / or the third tension member are steel wire ropes.

[0007] Optionally, one end of the mast is hinged to the turntable, and the other end of the mast is connected to the support mechanism via the second tension member. The third tension member and the pressure member are disposed between the connection position of the mast and the support mechanism and the hinge position of the lifting mast and the support mechanism.

[0008] Optionally, the pressure-bearing component includes a rod-shaped member with an adjustable length.

[0009] Optionally, the turntable is provided with a support base for pivotally supporting the support mechanism.

[0010] Optionally, the end of the support mechanism has a pin P, and the support seat has an upward-opening arc-shaped support groove for abutting the pin P.

[0011] Optionally, the superlift device includes a superlift counterweight connected to the end of the superlift mast via a second pull plate.

[0012] Optionally, the lifting equipment includes a superlift counterweight luffing device, one end of which is hinged to the turntable and the other end is connected to the second pull plate.

[0013] Optionally, the lifting equipment is a crawler crane.

[0014] Through the above technical solution, the support mechanism can bear pressure between the mast and the superlift mast. When there is no lifting or the lifting weight is light, the weight of the superlift counterweight can be transferred to the turntable through the support mechanism, thus keeping the superlift counterweight from touching the ground. Therefore, by ensuring that the superlift counterweight never touches the ground, it can be adapted to more working situations and improve efficiency. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of one embodiment of the lifting equipment of this application;

[0016] Figure 2 It is a display Figure 1 A partial view of the connection relationship between the mast, mast and supporting structure of the Chinese Super League.

[0017] Figures 3 to 11 This is an explanation Figure 1 A schematic diagram of the assembly process of the lifting equipment;

[0018] Figure 12 This is an explanation Figure 1 A schematic diagram showing the relationship between the support structure and the turntable when the lifting equipment is hoisting heavy objects;

[0019] Figure 13 This is an explanation Figure 1 A schematic diagram showing the relationship between the support structure and the turntable when the lifting equipment is lifting relatively small objects or not lifting.

[0020] Explanation of reference numerals in the attached figures

[0021] 10-Turntable, 11-Support base, 111-Arc-shaped support groove, 20-Mast, 21-First tension member, 30-Superlift device, 31-Superlift mast, 32-Second pull plate, 33-Superlift counterweight, 34-Superlift mast anti-tilt rod, 40-Support mechanism, 41-Second tension member, 42-Third tension member, 43-Pressure member, 50-Superlift counterweight luffing device, 51-First folding arm, 52-Second folding arm, 53-Hydraulic cylinder, 60-Main boom, 70-Superlift luffing pulley block, 80-Hook, P-Pin. Detailed Implementation

[0022] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "left," and "right" generally refer to the upper, lower, left, and right positions shown with reference to the accompanying drawings; "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] This application provides a lifting device, wherein the lifting device includes a turntable 10, a mast 20, a super-lift device 30, and a support mechanism 40. The super-lift device 30 includes a super-lift mast 31 hinged to the turntable 10. The mast 20 is connected to the super-lift mast 31 via a first tension member 21. One end of the support mechanism 40 is hinged to the end of the super-lift mast 31. The support mechanism 40 is connected to the mast 20 and the super-lift mast 31 via a second tension member 41 and a third tension member 42, respectively. The support mechanism 40 is connected to the super-lift mast 31 via a pressure-bearing member 43, so that the support mechanism 40 and the super-lift mast 31 maintain a fixed angle, thereby enabling the support mechanism 40 to bear pressure and be supported by the turntable 10 when under pressure.

[0025] Using the lifting equipment of this application, the support mechanism 40 can bear pressure between the mast 20 and the superlift mast 31. When not lifting or when the load is light, the weight of the superlift counterweight can be transferred to the turntable 10 through the support mechanism 40, thereby keeping the superlift counterweight from touching the ground. Therefore, by ensuring that the superlift counterweight never touches the ground, it can be adapted to more working conditions and improve efficiency.

[0026] Among them, the first tension member 21, the second tension member 41, the third tension member 42, and the pressure member 43 enable the support mechanism 40 to maintain a fixed angle relative to the lifting mast 31, thereby achieving:

[0027] 1. The support mechanism 40 and related components such as the superlift mast 31 will not interfere with each other;

[0028] 2. A constant space is left between the support mechanism 40 and the super-lift mast 31 to install related components such as the second tension member 41, the third tension member 42, and the pressure member 43;

[0029] 3. Ensure that the movement trajectory of the support mechanism 40 is fixed, thereby fixing the contact position between the support mechanism 40 and the turntable 10, so that a corresponding contact position can be set on the turntable 10.

[0030] Specifically, during assembly and use, the states of the second tension member 41, the third tension member 42, and the pressure member 43 differ as the support mechanism 40 moves to different positions with the superlift mast 31. Specifically, when the angle between the support mechanism 40 and the horizontal plane is less than 90° (i.e., the end of the superlift mast 31 faces the front of the lifting equipment), the second tension member 41 is under tension, and the pressure member 43 is under compression; when the angle between the support mechanism 40 and the horizontal plane is greater than 90° (i.e., the end of the superlift mast 31 faces the rear of the lifting equipment), the third tension member 42 is under tension, and the pressure member 43 is under compression.

[0031] In this application, the support mechanism 40 can be of various suitable forms to bear pressure. Preferably, such as Figure 1 As shown, the support mechanism 40 can be a truss structure, thereby enabling it to withstand pressure along the extension direction of the truss structure. Furthermore, since the truss structure is a frame structure composed of straight and diagonal members, it has a large internal space, facilitating the arrangement of related components.

[0032] As described above, the first tension member 21, the second tension member 41, and the third tension member 42 bear tensile force, and the pressure member 43 bears compressive force, so that the support mechanism 40 can maintain a fixed angle relative to the lifting mast 31. The specific forms of the first tension member 21, the second tension member 41, the third tension member 42, and the pressure member 43 can be set as needed.

[0033] For example, the first tension member 21 can be a first tension plate and is arranged through the truss structure. The second tension member 41 and the third tension member 42 also only need to bear tensile force and can be configured in various suitable forms. For example, the second tension member 41 and / or the third tension member 42 can be steel wire ropes.

[0034] The arrangement of the first supporting member 21, the second supporting member 41, the third supporting member 42, and the pressure-bearing member 43 can also be set as needed, as long as the support mechanism 40 can maintain a relatively fixed included angle relative to the lifting mast 31. Preferably, such as Figure 1 and Figure 2As shown, one end of the mast 20 is hinged to the turntable 10, and the other end of the mast 20 is connected to the support mechanism 40 through the second tension member 41. The third tension member 42 and the pressure member 43 are disposed between the connection position of the mast 20 and the support mechanism 40 and the hinge position of the super-lift mast 31 and the support mechanism 40.

[0035] The pressure-bearing component 43 can take various suitable forms, such as a support rod. To facilitate adaptive fine-tuning of the relative positions of the components during installation, the pressure-bearing component 43 preferably includes a rod-like member with adjustable length. Specifically, during installation, for example, to ensure that the truss structure of the support mechanism 40 is compressed along its length, it is necessary to adjust the angle between the support mechanism 40 and the super-lift mast 31 (e.g., by slightly rotating the support mechanism 40 around the hinge position). After the angle is adjusted, the pressure-bearing component 43 can adjust its length accordingly to provide pressure support between the support mechanism 40 and the super-lift mast 31. For the first tensioning component 21, the second tensioning component 41, and the third tensioning component 42, which are in the form of pull plates or wire ropes, their lengths can be easily adjusted to accommodate the adjustment of the angle.

[0036] To achieve superlift operation, the superlift device 30 includes a superlift counterweight 33 connected to the end of the superlift mast 31 via a second pull plate 32.

[0037] During use, as components such as the lifting mast 31 pivot around the turntable 10, the support mechanism 40 also rotates. To facilitate support during the rotation of the support mechanism 40, the turntable 10 is provided with a support base 11 for pivotally supporting the support mechanism 40. Depending on the structure of the supported position, the support base 11 can be configured with appropriate structures to provide pivotal support.

[0038] like Figure 12 and Figure 13 As shown, the end of the support mechanism 40 may have a pin P, and the support base 11 has an upward-opening arc-shaped support groove 111 for abutting the pin P. Specifically, as... Figure 12 As shown, when the load is under superlift operation and the lifting weight is large, the superlift counterweight 33 is used to balance the load. At this time, the support mechanism 40 is not under pressure and does not contact the turntable 10. Figure 13 As shown, when the weight of the load is small or when it is not being lifted, part of the weight of the super-lift counterweight 33 is used to balance the load. At this time, the support mechanism 40 is under pressure and forms a semi-hinged contact with the turntable 10 through the pin P and the arc-shaped support groove 111 to transfer the pressure to the turntable 10, so that the super-lift counterweight 33 still does not touch the ground (i.e., it is suspended).

[0039] Among them, when in such a state Figure 13In the illustrated operating condition, although the superlift counterweight 33 is suspended, its distance from the main unit located on the turntable 10 needs to be adjusted. For this purpose, the lifting equipment may include a superlift counterweight luffing device 50, one end of which is hinged to the turntable 10, and the other end connected to the second pull plate 32, to facilitate operation during changes in operating conditions and adjust the distance between the superlift counterweight 33 and the main unit. Specifically, as shown... Figure 8 As shown, the super-lift counterweight luffing device 50 includes a first folding arm 51, a second folding arm 52, and a hydraulic cylinder 53. The second folding arm 52 is hinged to the turntable 10, the first folding arm 51 is hinged to the second folding arm 52, and the hydraulic cylinder 53 connects the first folding arm 51 and the second folding arm 52 to drive the second pull plate 32 through the first folding arm 51 and change the position of the super-lift counterweight 33.

[0040] The lifting equipment in this application can be any type of lifting equipment with over-lifting capabilities, for example, the lifting equipment can be a crawler crane.

[0041] The assembly and operation of the lifting device of this application are described below with reference to the accompanying drawings.

[0042] In the illustrated embodiment, the lifting equipment is a crawler crane. Specifically, a support mechanism 40 or similar device can be added to a regular crawler crane to achieve the levitation of the superlift counterweight 33. It is understood that without the support mechanism 40 or similar device, the crawler crane can be used as a regular crawler crane and can also perform superlift operations, but the levitation of the superlift counterweight 33 cannot be achieved; that is, the superlift counterweight 33 needs to be brought to the ground after the work cycle is completed.

[0043] The following describes the installation process on a conventional crawler crane to achieve levitation.

[0044] First, such as Figure 3 As shown, the super-lift mast 31 is installed with the assistance of auxiliary lifting equipment (such as a crane), and one end of the super-lift mast 31 is hinged to the turntable 10.

[0045] Then, as Figure 4 As shown, one end of the support mechanism 40 is hinged to the end of the super-lift mast 31, and one end of the mast 20 is connected to the support mechanism 40 via the second support member 41. Figure 5 As shown, the first tension member 21 passes through the internal space of the truss structure, connecting the mast 20 and the super-lift mast 31. Furthermore, a second tension member 42 and a pressure member 43 are provided at the midpoint between the super-lift mast 31 and the support mechanism 40.

[0046] Subsequently, as Figure 6 As shown, a superlift luffing pulley block 70 is installed at the end of the superlift mast 31. Then, the main boom 60 is installed, as shown... Figure 7As shown, one end of the main boom 60 is hinged to the turntable 10, and the other end of the main boom 60 is connected through the super-lift luffing pulley group 70.

[0047] Then, as Figure 8 As shown, a super-lift counterweight luffing device 50 is installed, wherein the second folding arm 52 is hinged to the turntable 10. Subsequently, as... Figure 9 As shown, connect the first folding arm 51 to the second pull plate 32. Then, as... Figure 10 As shown, connect the superlift counterweight 33 to the second pull plate 32. Finally, as... Figure 11 As shown, the hook 80 is installed to the end of the main boom 60 to complete the assembly. During this process, it is necessary to pivot the superlift mast 31 and use the superlift mast anti-tilt bar 34 to limit overload, in order to facilitate the installation of related components.

[0048] Once assembly is complete, the boom can be raised.

[0049] When the center of gravity of the lifting equipment is at the rear (when the weight of the load is small or not being lifted), the superlift mast 31, turntable 10, and support mechanism 40 form a stable triangular structure. Through the coordination and adjustment of the superlift counterweight luffing device 50, the weight of the superlift counterweight 33 can be transferred to the turntable 10, ensuring that the superlift counterweight 33 never touches the ground. Therefore, the lifting equipment of this application is suitable for situations where there is no ground support behind it, and because it does not require frequent disassembly and stacking of the superlift counterweight 33, it improves operational efficiency.

[0050] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention. This application includes combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not further describe the various possible combinations. However, these simple modifications and combinations should also be considered as part of the content disclosed in this invention and are all within the protection scope of this invention.

Claims

1. A lifting device, characterized in that, The lifting equipment includes a turntable (10), a mast (20), a super-lift device (30), and a support mechanism (40). The super-lift device (30) includes a super-lift mast (31) hinged to the turntable (10). The mast (20) is connected to the super-lift mast (31) through a first bearing member (21). One end of the support mechanism (40) is hinged to the end of the super-lift mast (31). The support mechanism (40) is connected to the mast (20) and the super-lift mast (31) through a second bearing member (41) and a third bearing member (42), respectively. The support mechanism (40) is connected to the super-lift mast (31) through a pressure-bearing member (43) so that the support mechanism (40) and the super-lift mast (31) maintain a fixed angle, so that the support mechanism (40) can bear pressure and be supported by the turntable (10) when bearing pressure. The turntable (10) is provided with a support seat (11) for pivotally supporting the support mechanism (40), the end of the support mechanism (40) has a pin P, and the support seat (11) has an upward-opening arc-shaped support groove (111) for abutting the pin P.

2. The lifting equipment according to claim 1, characterized in that, The support mechanism (40) is a truss structure to withstand pressure along the extension direction of the truss structure, and the first tension member (21) is a first tension plate and is arranged through the truss structure.

3. The lifting equipment according to claim 1, characterized in that, The second tension member (41) and / or the third tension member (42) are steel wire ropes.

4. The lifting equipment according to claim 1, characterized in that, One end of the mast (20) is hinged to the turntable (10), and the other end of the mast (20) is connected to the support mechanism (40) through the second bearing member (41). The third bearing member (42) and the pressure member (43) are disposed between the connection position of the mast (20) and the support mechanism (40) and the hinge position of the super-lift mast (31) and the support mechanism (40).

5. The lifting equipment according to claim 1, characterized in that, The pressure-bearing component (43) includes a rod-shaped component with adjustable length.

6. The lifting equipment according to any one of claims 1-5, characterized in that, The superlift device (30) includes a superlift counterweight (33) connected to the end of the superlift mast (31) via a second pull plate (32).

7. The lifting equipment according to claim 6, characterized in that, The lifting equipment includes a super-lift counterweight luffing device (50), one end of which is hinged to the turntable (10) and the other end is connected to the second pull plate (32).

8. The lifting equipment according to any one of claims 1-5, characterized in that, The lifting equipment is a crawler crane.

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