Crane and additional counterweight loading and unloading method

Abstract

The invention relates to the technical field of operation machinery, and provides a crane and an additional counterweight loading and unloading method. The crane comprises a rotary table, a main variable-amplitude mast and a supporting part; the first end of the main variable-amplitude mast is rotationally connected to the first side of the rotary table, and the second end of the main variable-amplitude mast is connected with a main variable-amplitude oil cylinder; the supporting component is arranged on the second side of the turntable; the main variable-amplitude mast is suitable for rotating between a first position and a second position, and in the first position, the main variable-amplitude oil cylinder is located on the first side of the rotary table; and at the second position, the main variable-amplitude oil cylinder is located on the second side of the rotary table, and the additional balance weight mechanism is connected to the main variable-amplitude oil cylinder through the supporting component. The main variable-amplitude mast is rotated to the second position from the first position, the additional balance weight mechanism is connected to the main variable-amplitude oil cylinder through the supporting component, and the main variable-amplitude oil cylinder serves as power for lifting of the additional balance weight mechanism; therefore, the main variable-amplitude oil cylinder of the crane is used as an additional counterweight lifting power source, an existing lifting oil cylinder structure can be omitted, and the manufacturing cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of operating machinery, and in particular to a crane and an additional counterweight loading and unloading method. Background Art

[0002] Crawler crane is a kind of lifting machinery with full rotation, multi-section truss arm combination and crawler chassis. It is widely used in metallurgy, energy, steel, chemical industry and other fields, and can carry out lifting, installation and transportation of materials. Crawler crane is also a widely used lifting and transportation equipment, with good lifting performance, small ground pressure, small turning radius, load-carrying walking, low requirements on ground environment, etc., and has a position that other operating machinery cannot replace.

[0003] In the prior art, in order to increase the anti-overturning moment, the crane is usually equipped with an additional counterweight. However, the lifting and lowering of the additional counterweight requires the help of a lifting cylinder structure. Thus, the lifting cylinder structure used by the additional counterweight increases the manufacturing cost. Summary of the invention

[0004] The invention provides a crane and an additional counterweight loading and unloading method, which are used to solve the defect of increasing manufacturing cost in the prior art.

[0005] The present invention provides a crane, comprising: Turntable; A main luffing mast, wherein a first end of the main luffing mast is rotatably connected to a first side of the turntable, and a second end of the main luffing mast is connected to a main luffing cylinder; A supporting member, disposed on the second side of the turntable; The main luffing mast is suitable for rotating between a first position and a second position. In the first position, the main luffing cylinder is located on a first side of the turntable; in the second position, the main luffing cylinder is located on a second side of the turntable. An additional counterweight mechanism is connected to the main luffing cylinder through the supporting component, and the main luffing cylinder is used to drive the additional counterweight mechanism to perform lifting and lowering.

[0006] According to a crane provided by the present invention, the supporting component comprises an additional counterweight support frame and a first pulley block, the additional counterweight support frame is arranged on the second side of the turntable, the first pulley block is rotatably arranged on the additional counterweight support frame; the additional counterweight mechanism has a second pulley block; In the second position, the additional counterweight support frame and the main luffing cylinder are connected by a rope, and the rope is wound around the second pulley block and the first pulley block.

[0007] According to a crane provided by the present invention, the additional counterweight support frame is rotatably connected to the turntable, and the second side of the turntable has a receiving cavity for receiving the supporting component; The additional counterweight support frame is suitable for rotating between a third position and a fourth position. In the third position, the support component is located in the accommodating cavity; in the fourth position, the support component is moved out of the accommodating cavity.

[0008] According to a crane provided by the present invention, in the fourth position, the angle between the plane where the additional counterweight support frame is located and the plane where the turntable is located is an obtuse angle.

[0009] According to a crane provided by the present invention, the additional counterweight support frame has a first positioning member, the turntable has a second positioning member, and in the third position, the first positioning member cooperates with the second positioning member, and / or,

[0010] The additional counterweight support frame has a third positioning member, and the turntable has a fourth positioning member. In the fourth position, the third positioning member cooperates with the fourth positioning member.

[0011] According to a crane provided by the present invention, the additional counterweight mechanism further includes an additional counterweight tray connected below the second pulley block.

[0012] According to a crane provided by the present invention, the additional counterweight pallet is connected to the second pulley block via a connecting frame, two ends of the connecting frame are rotatably connected to two ends of the additional counterweight pallet respectively, and / or the middle part of the connecting frame is rotatably connected to the second pulley block.

[0013] According to a crane provided by the present invention, the second pulley block has a first connection position and a second connection position arranged at intervals in the horizontal direction; the connecting frame includes a first connecting member, a second connecting member and a third connecting member; the first end of the first connecting member is rotatably connected to the first end of the additional counterweight pallet, the second end of the first connecting member, the first end of the second connecting member and the first connection position are rotatably connected, the second end of the second connecting member, the first end of the third connecting member and the second connection position are rotatably connected, and the second end of the third connecting member is rotatably connected to the second end of the additional counterweight pallet.

[0014] According to a crane provided by the present invention, the crane further comprises a jib-changeable jib working condition boom connected to the first side of the turntable; in the second position, the jib-changeable jib working condition boom is used to locate the position of the main variable-luffing mast.

[0015] The present invention further provides a method for loading and unloading an additional counterweight of a crane, based on any one of the cranes described above, the method comprising the following steps: Rotating the main luffing mast so that the main luffing mast rotates from a first position to a second position; The additional counterweight mechanism is connected to the main luffing cylinder via a supporting component, and the main luffing cylinder is used to drive the additional counterweight mechanism to move up and down.

[0016] The crane provided by the present invention is rotatably connected to the turntable through a main luffing mast, the main luffing mast is located at a first position, the main luffing cylinder on the main luffing mast is located at a first side of the turntable, and the main luffing cylinder is used for normal self-loading and unloading of the hoisting cylinder; and after the self-loading and unloading is completed, the main luffing mast is rotated from the first position to the second position, the additional counterweight mechanism is connected to the main luffing cylinder through a supporting component, and the main luffing cylinder serves as the power for lifting and lowering the additional counterweight mechanism; in this way, the main luffing cylinder of the crane is used as the power source for lifting the additional counterweight, so that the existing lifting cylinder structure can be omitted, and the manufacturing cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural schematic diagram of the crane provided by the present invention in a first state.

[0019] Figure 2 It is a schematic diagram of the main structure of the crane provided by the present invention in the second state.

[0020] Figure 3 It is a side structural schematic diagram of the crane provided by the present invention in the second state.

[0021] Figure 4 It is a schematic diagram of the structure of the crane provided by the present invention in a top view in the second state.

[0022] Figure 5 This is one of the structural schematic diagrams of the crane provided by the present invention in the second state.

[0023] Figure 6 yes Figure 5 Schematic diagram of the structure at the middle main luffing mast.

[0024] Figure 7 This is the second structural schematic diagram of the crane provided by the present invention in the second state.

[0025] Figure 8 yes Figure 7 Schematic diagram of the structure at the middle main luffing mast.

[0026] Fig. 9 This is one of the structural schematic diagrams of the additional counterweight mechanism provided by the present invention.

[0027] Fig.10 This is the second structural schematic diagram of the additional counterweight mechanism provided by the present invention.

[0028] Fig.11 It is a schematic flow chart of the crane additional counterweight loading and unloading method provided by the present invention.

[0029] Figure numerals: 100, turntable; 200, main luffing mast; 210, wire rope; 220, counterweight structure; 300, main luffing cylinder; 400, supporting component; 410, additional counterweight support frame; 420, first pulley block; 500, additional counterweight mechanism; 510, second pulley block; 511, first connecting position; 512, second connecting position; 520, additional counterweight tray; 530, rope; 540, connecting frame; 541, first connecting piece; 542, second connecting piece; 543, third connecting piece; 600, machine body; 700, variable auxiliary jib working condition arm frame. DETAILED DESCRIPTION

[0030] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0032] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0033] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0035] Combine the following Figure 1-Figure 10 A crane according to an embodiment of the present invention will be described.

[0036] The embodiment of the first aspect of the present invention provides a crane, such as Figures 1 to 4 As shown, the crane includes a turntable 100, a main luffing mast 200 and a supporting component 400. The first end of the main luffing mast 200 is rotatably connected to a first side of the turntable 100, the second end of the main luffing mast 200 is connected to a main luffing cylinder 300, and the supporting component 400 is arranged on the second side of the turntable 100.

[0037] Among them, the main luffing mast 200 is rotatably connected to the turntable 100, and the main luffing mast 200 is suitable for rotating between a first position and a second position. The main luffing mast 200 is in the first position, and the main luffing cylinder 300 is located on the first side of the turntable 100; the main luffing mast 200 is in the second position, and the main luffing cylinder 300 is located on the second side of the turntable 100, and the additional counterweight mechanism 500 is connected to the main luffing cylinder 300 through the supporting component 400, and the main luffing cylinder 300 is used to drive the additional counterweight mechanism 500 to lift and lower.

[0038] It is understandable that if Figure 1As shown, in the assembly stage of the crane, the turntable 100 is arranged on the machine body 600, the main luffing mast 200 is in the first position under the operation of the wire rope 210, the main luffing cylinder 300 is located on the first side of the turntable 100, and the main luffing cylinder 300 located on the main luffing mast 200 is used for normal self-loading and unloading hoisting cylinder use; Figures 2 to 4 As shown, after the assembly is completed, the main luffing mast 200 is rotated from the first position to the second position. At this time, the additional counterweight mechanism 500 is connected to the main luffing cylinder 300 through the support component 400, and the additional counterweight mechanism 500 is driven to rise and fall by the extension and contraction of the main luffing cylinder 300 to provide power for the additional counterweight mechanism 500 to leave the ground, thereby realizing the addition of additional counterweight to the crane. It should be noted here that the assembly stage of the crane can be the mainframe assembly stage of the crane.

[0039] It should be noted that, currently, the main luffing cylinder 300 of the main luffing mast 200 is in an idle state after self-loading and unloading is completed, which causes a waste of resources. In this embodiment, the main luffing mast 200 is rotatably connected to the turntable 100, and the main luffing mast 200 is rotated after self-loading and unloading is completed, so that the main luffing cylinder 300 is rotated to the second side of the turntable 100, which serves as the power for the lifting of the additional counterweight mechanism 500, and the crane is equipped with an additional counterweight. In this way, the main luffing cylinder 300 of the crane is used as the power source for lifting the additional counterweight, and the lifting cylinder structure can be omitted.

[0040] It should be noted that the first side of the turntable 100 may be the front side of the traveling direction of the crane, that is, the front side of the turntable; the second side of the turntable 100 is the rear side of the traveling direction of the crane, that is, the rear side of the turntable.

[0041] The crane provided by the embodiment of the present invention is rotatably connected to the turntable 100 through a main luffing mast 200, the main luffing mast 200 is located at a first position, the main luffing cylinder 300 on the main luffing mast 200 is located at a first side of the turntable 100, and the main luffing cylinder 300 is used for normal self-loading and unloading of the hoisting cylinder; and after the self-loading and unloading is completed, the main luffing mast 200 is rotated from the first position to the second position, and the additional counterweight mechanism 500 is connected to the main luffing cylinder 300 through a supporting component 400, and the main luffing cylinder 300 serves as the power for lifting and lowering the additional counterweight mechanism 500; in this way, by using the main luffing cylinder 300 of the crane as the power source for lifting the additional counterweight, the existing lifting cylinder structure can be omitted, and the manufacturing cost can be reduced.

[0042] In one embodiment of the present invention, Figure 1 and Figure 6As shown, the support component 400 includes an additional counterweight support frame 410 and a first pulley set 420 . The additional counterweight support frame 410 is arranged on the second side of the turntable 100 , and the first pulley set 420 is rotatably arranged on the additional counterweight support frame 410 ; the additional counterweight mechanism 500 has a second pulley set 510 .

[0043] It can be understood that an additional counterweight support frame 410 is provided on the rear side of the turntable 100, and a first pulley block 420 is provided on the additional counterweight support frame 410, and a second pulley block 510 cooperating with the first pulley block 420 is provided on the upper part of the additional counterweight mechanism 500; when the crane is not equipped with additional counterweight, the additional counterweight mechanism 500 is located on the ground; when the crane needs to be equipped with additional counterweight, the main luffing mast 200 is rotated so that the main luffing mast 200 is in the second position, and the main luffing cylinder 300 is located on the rear side of the turntable 100 at this time, and the additional counterweight support frame 410 and the main luffing cylinder 300 are connected by a rope 530, and the rope 530 is wound around the second pulley block 510 and the first pulley block 420, and the retraction of the main luffing cylinder 300 provides power for the additional counterweight mechanism 500 to leave the ground, so as to realize the crane being equipped with additional counterweight. It should be noted here that, by extending the main luffing cylinder 300 , power is provided for the additional counterweight mechanism 500 to return to the ground, so as to remove the additional counterweight from the crane.

[0044] In one embodiment of the present invention, the additional counterweight support frame 410 is rotatably connected to the turntable 100, and the second side of the turntable 100 has a receiving cavity (not shown in the figure) for receiving the support component 400; the additional counterweight support frame 410 is suitable for rotating between a third position and a fourth position, in the third position, the support component 400 is located in the receiving cavity; in the fourth position, the support component 400 moves out of the receiving cavity.

[0045] It can be understood that, during the assembly stage of the crane, the main luffing mast 200 is located in the first position and the supporting component 400 is located in the accommodating cavity at the rear of the turntable 100; when the crane needs to be equipped with additional counterweight, the main luffing mast 200 is rotated so that the main luffing mast 200 is in the second position, at which time the main luffing cylinder 300 is located at the rear side of the turntable 100, and the supporting component 400 is rotated from the third position to the fourth position, so that the supporting component 400 moves out of the accommodating cavity and is located at the rear of the turntable 100, and the additional counterweight mechanism 500 is connected to the main luffing cylinder 300 through the supporting component 400, so as to increase the additional counterweight of the crane.

[0046] Furthermore, the supporting component 400 moves out of the accommodating cavity and is in the fourth position. At this time, the angle between the plane where the additional counterweight support frame 410 is located and the plane where the turntable 100 is located is an obtuse angle, so that the first pulley group 420 is located in the extension and retraction direction of the main boom cylinder 300 on the main boom mast 200 in the second position, which facilitates the assembly connection between the additional counterweight support frame 410, the main boom cylinder 300, the second pulley group 510 and the first pulley group 420.

[0047] In one embodiment of the present invention, the additional counterweight support frame 410 has a first positioning member (not shown in the figure), and the turntable 100 has a second positioning member (not shown in the figure). In the third position, the first positioning member cooperates with the second positioning member, so that the support component 400 is limited to the third position through the contact and cooperation between the first positioning member and the second positioning member.

[0048] The additional counterweight support frame 410 may also have a third positioning member (not shown in the figure), and the turntable 100 has a fourth positioning member (not shown in the figure). In the fourth position, the third positioning member cooperates with the fourth positioning member, so that the support component 400 is limited to the fourth position through the contact and cooperation between the third positioning member and the fourth positioning member.

[0049] Optionally, the first positioning member and the second positioning member may adopt other positioning structures such as matching groove and protrusion structures, matching positioning ramp structures, etc.; of course, the third positioning member and the fourth positioning member may also adopt including but not limited to matching groove and protrusion structures, matching positioning ramp structures.

[0050] Optionally, the first pulley group 420 includes a first mounting frame and a first pulley arranged on the first mounting frame, and the first mounting frame is arranged on the additional counterweight support frame 410; the second pulley group 510 includes a second mounting frame and a second pulley arranged on the second mounting frame, and the rope 530 is a steel wire rope, one end of the steel wire rope is connected to the additional counterweight support frame 410, and the other end of the steel wire rope is wound around the second pulley and the first pulley and then connected to the telescopic end of the main boom cylinder 300.

[0051] Furthermore, in order to improve the stability of the lifting and lowering of the additional counterweight mechanism 500, a plurality of steel wire ropes are arranged side by side, and the first pulley is provided with a corresponding plurality of first annular grooves along the axial direction, and the plurality of steel wire ropes are correspondingly wound around the plurality of first annular grooves; correspondingly, the second pulley is also provided with a corresponding plurality of second annular grooves along the axial direction; preferably, the plurality of first annular grooves are arranged at equal intervals along the axial direction, and the plurality of second annular grooves are arranged at equal intervals along the axial direction.

[0052] In one embodiment of the present invention, Fig. 9 and Fig.10As shown, the additional counterweight mechanism 500 includes an additional counterweight structure 220 and a second pulley block 510 disposed on the additional counterweight structure 220, and a second mounting frame of the second pulley block 510 is connected to the top of the additional counterweight structure 220, so that the additional counterweight structure 220 can provide additional counterweight for the crane.

[0053] Further, the additional counterweight structure 220 may include an additional counterweight tray 520 and additional counterweight blocks disposed on the additional counterweight tray 520. It should be noted that the weight and quantity of the additional counterweight blocks on the additional counterweight tray 520 may be reasonably placed according to actual additional counterweight needs.

[0054] It should be noted that in the prior art, an additional rear counterweight support frame of a truss structure is provided at the rear side of the crane, and the additional rear counterweight support frame and the pallet are connected by a lifting cylinder. Therefore, the additional rear counterweight support frame and the lifting cylinder, and the lifting cylinder and the pallet are all hard-connected, which makes installation and positioning difficult, and the lifting cylinder is prone to damage the additional rear counterweight support frame when it is over the top. In this embodiment, the additional counterweight support frame 410 and the main luffing cylinder 300 are connected by a rope 530, and the rope 530 is wound around the second pulley block 510 and the first pulley block 420. The additional counterweight pallet 520 is connected below the second pulley block 510. The additional counterweight support frame 410 and the additional counterweight pallet 520 are connected by the pulley rope 530, that is, a soft connection is used, and the soft connection has low installation centering requirements and is simple to install; and it can avoid damage to the additional counterweight support frame 410 by the main luffing cylinder 300 over the top.

[0055] In one embodiment of the present invention, Fig.10 As shown, the additional counterweight tray 520 is connected to the second pulley block 510 via a connecting frame 540 , the two ends of the connecting frame 540 are rotatably connected to the two ends of the additional counterweight tray 520 , and the middle portion of the connecting frame 540 is rotatably connected to the second pulley block 510 .

[0056] Optionally, the second mounting frame of the second pulley block 510 has a first connection position 511 and a second connection position 512 arranged at intervals in the horizontal direction below; the connecting frame 540 includes a first connecting member 541, a second connecting member 542 and a third connecting member 543; the first end of the first connecting member 541 is rotatably connected to the first end of the additional counterweight tray 520, the second end of the first connecting member 541, the first end of the second connecting member 542 and the first connection position 511 are rotatably connected, the second end of the second connecting member 542, the first end of the third connecting member 543 and the second connection position 512 are rotatably connected, and the second end of the third connecting member 543 is rotatably connected to the second end of the additional counterweight tray 520. It should be noted here that the rotational connection can be a coaxial rotational connection through a rotating shaft.

[0057] Furthermore, the first end of the additional counterweight tray 520 has a first connecting frame 540, and the first connecting frame 540 and the first end of the first connecting member 541 are coaxially connected for rotation via a first rotating shaft; the second end of the additional counterweight tray 520 has a second connecting frame 540, and the second connecting frame 540 and the second end of the third connecting member 543 are coaxially connected via a second rotating shaft; the first rotating shaft is also connected to the first supporting seat, and the second rotating shaft is also connected to the second supporting seat, the first supporting seat and the second supporting seat are arranged opposite to each other, and support rods are arranged on the first supporting seat and the second supporting seat to prevent the first connecting frame 540 and the second connecting frame 540 from retracting inward when the additional counterweight tray 520 is lifted.

[0058] In one embodiment of the present invention, Figure 5 As shown, the crane further comprises a jib-variable working condition boom 700 connected to a first side of the turntable 100 , the main luffing mast 200 is in a second position, and the jib-variable working condition boom 700 is used for positioning the main luffing mast 200 .

[0059] It can be understood that after the crane assembly stage (i.e., main machine assembly) is completed, the main luffing mast 200 can be rotated from the first position to the second position when the sub-jib working condition boom 700 is connected, so that the main luffing cylinder 300 is located behind the main luffing mast 200, and the sub-jib working condition boom 700 is connected to the turntable 100, and the sub-jib working condition boom 700 is also connected to the second end of the main luffing mast 200, so as to locate the position of the main luffing mast 200 through the sub-jib working condition boom 700.

[0060] In a specific embodiment of the present invention, the crane is a crawler crane, and the working principle is specifically as follows: like Figure 1 As shown, during the assembly stage of the crawler crane, the main luffing cylinder 300 located on the main luffing mast 200 is located at the front side of the turntable 100 and is used for normal self-loading and unloading hoisting cylinder use.

[0061] like Figure 5 and Figure 6 As shown, after the main engine is assembled, when the auxiliary boom working condition boom 700 is connected, the main boom mast 200 is rotated so that the main boom mast 200 is in the second position, so that the main boom cylinder 300 on the main boom mast 200 is rotated to the rear of the turntable 100. At this time, one end of the wire rope is connected to the additional counterweight support frame 410, and the other end of the wire rope is connected to the telescopic end of the main boom cylinder 300 after being wound around the second pulley and the first pulley, so as to realize the connection between the additional counterweight support frame 410, the main boom cylinder 300 and the additional counterweight structure 220, and provide the power for the additional counterweight mechanism 500 to leave the ground through the telescopic movement of the main boom cylinder 300.

[0062] like Figure 7 and Figure 8As shown, taking the 6-fold ratio as an example, the stroke of the main luffing cylinder 300 is 2300 mm. After the main luffing cylinder 300 is fully retracted, the additional counterweight mechanism 500 will be lifted to a height of 2300 mm / 6=383 mm from the ground, meeting the use requirements of the additional counterweight.

[0063] Furthermore, the support component 400 can use the hawk's beak arm to reduce the cost of the additional counterweight support frame 410 .

[0064] It should be noted that this embodiment is suitable for working conditions where the angle of the crawler crane's main arm does not change greatly during operation, such as the luffing jib working condition. The crane is equipped with additional counterweights through the main luffing cylinder 300 to improve the performance of lifting the arm and hoisting.

[0065] The crane provided in the embodiment of the present invention utilizes the idle main luffing cylinder 300 to improve the utilization rate of the main luffing cylinder 300 and can omit the lifting cylinder structure, thereby effectively reducing the manufacturing cost.

[0066] Based on the crane provided in any of the above embodiments, the second aspect of the present invention provides a method for loading and unloading an additional counterweight of a crane, such as Fig.11 As shown, the additional counterweight loading and unloading method includes the following steps 10 and 20.

[0067] Step 10: Rotate the main luffing mast 200 so that the main luffing mast 200 rotates from the first position to the second position.

[0068] Step 20: Connect the additional counterweight mechanism 500 to the main luffing cylinder 300 through the supporting component 400. The main luffing cylinder 300 is used to drive the additional counterweight mechanism 500 to move up and down.

[0069] The method for loading and unloading an additional counterweight of a crane provided in an embodiment of the present invention is that a main luffing mast 200 is rotatably connected to a turntable 100, the main luffing mast 200 is located at a first position, a main luffing cylinder 300 on the main luffing mast 200 is located at a first side of the turntable 100, and the main luffing cylinder 300 is used for normal self-loading and unloading of the hoisting cylinder; and after the self-loading and unloading is completed, the main luffing mast 200 is rotated from the first position to the second position, and an additional counterweight mechanism 500 is connected to the main luffing cylinder 300 through a supporting component 400, and the main luffing cylinder 300 serves as the power for lifting and lowering the additional counterweight mechanism 500; in this way, by using the main luffing cylinder 300 of the crane as the power source for lifting the additional counterweight, the existing lifting cylinder structure can be omitted, and the manufacturing cost can be reduced.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A crane, characterized in that: include: Turntable; A main luffing mast, wherein a first end of the main luffing mast is rotatably connected to a first side of the turntable, and a second end of the main luffing mast is connected to a main luffing cylinder; A supporting member, disposed on the second side of the turntable; The main luffing mast is adapted to rotate between a first position and a second position, wherein in the first position, the main luffing cylinder is located at a first side of the turntable; In the second position, the main luffing cylinder is located at the second side of the turntable, the additional counterweight mechanism is connected to the main luffing cylinder through the supporting component, and the main luffing cylinder is used to drive the additional counterweight mechanism to rise and fall.

2. The crane according to claim 1, characterized in that: The supporting component comprises an additional counterweight support frame and a first pulley block, wherein the additional counterweight support frame is arranged on the second side of the turntable, and the first pulley block is rotatably arranged on the additional counterweight support frame; the additional counterweight mechanism has a second pulley block; In the second position, the additional counterweight support frame and the main luffing cylinder are connected by a rope, and the rope is wound around the second pulley block and the first pulley block.

3. The crane according to claim 2, characterized in that: The additional counterweight support frame is rotatably connected to the turntable, and the second side of the turntable has a receiving cavity for receiving the supporting component; The additional counterweight support frame is suitable for rotating between a third position and a fourth position. In the third position, the support component is located in the accommodating cavity; in the fourth position, the support component is moved out of the accommodating cavity.

4. The crane according to claim 3, characterized in that: In the fourth position, the angle between the plane where the additional counterweight support frame is located and the plane where the turntable is located is an obtuse angle.

5. The crane according to claim 3, characterized in that: The additional counterweight support frame has a first positioning member, and the turntable has a second positioning member. In the third position, the first positioning member cooperates with the second positioning member, and / or, The additional counterweight support frame has a third positioning member, and the turntable has a fourth positioning member. In the fourth position, the third positioning member cooperates with the fourth positioning member.

6. The crane according to any one of claims 2 to 5, characterized in that: The additional counterweight mechanism also includes an additional counterweight tray connected below the second pulley block.

7. The crane according to claim 6, characterized in that The additional counterweight tray is connected to the second pulley block via a connecting frame; The two ends of the connecting frame are rotatably connected to the two ends of the additional counterweight tray respectively, and / or the middle part of the connecting frame is rotatably connected to the second pulley block.

8. The crane according to claim 7, characterized in that: The second pulley group has a first connection position and a second connection position arranged at intervals in the horizontal direction; the connecting frame includes a first connecting member, a second connecting member and a third connecting member; the first end of the first connecting member is rotatably connected to the first end of the additional counterweight tray, the second end of the first connecting member, the first end of the second connecting member and the first connection position are rotatably connected, the second end of the second connecting member, the first end of the third connecting member and the second connection position are rotatably connected, and the second end of the third connecting member is rotatably connected to the second end of the additional counterweight tray.

9. The crane according to any one of claims 1 to 5, characterized in that: The crane further comprises a jib-type jib working condition jib connected to a first side of the turntable; in the second position, the jib-type jib working condition jib is used for positioning the main luffing mast.

10. A method for loading and unloading an additional counterweight of a crane, characterized in that: Based on the crane according to any one of claims 1 to 9, the method comprises: Rotating the main luffing mast so that the main luffing mast rotates from a first position to a second position; The additional counterweight mechanism is connected to the main luffing cylinder via a supporting component, and the main luffing cylinder is used to drive the additional counterweight mechanism to move up and down.

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