Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
  • B66C23/62—Constructional features or details
  • B66C23/72—Counterweights or supports for balancing lifting couples
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
  • B66C23/62—Constructional features or details
  • B66C23/72—Counterweights or supports for balancing lifting couples
  • B66C23/74—Counterweights or supports for balancing lifting couples separate from jib

Definitions

• a method of adding counterweights to a rotary table is generally adopted to balance the weight of the lifted load and ensure a lifting capacity.
• the counterweight is often suspended as a whole on a hoisting box on an outer edge of a rotary table, and at least part of the counterweight protrudes out of a vehicle.
• An object of the present application is to provide a counterweight apparatus and an operation machine to solve at least one of the problems existing in the prior art.
• the counterweight apparatus provided in the present application further includes: a second mounting-and-demounting apparatus detachably connected to the main counterweight, wherein the second mounting-and-demounting apparatus is configured to drive the main counterweight to move to a second preset mounting position, and the second preset mounting position is located on the rotary table.
• a mounting gap is formed between the secondary counterweight and the main counterweight.
• the counterweight apparatus provided in the present application further includes: a connection assembly arranged on the secondary counterweight for connecting the secondary counterweight to the rotary table.
• the present application further provides an operation machine including the counterweight apparatus as described in any one of the above items.
• the counterweight apparatus configured to be connected to a rotary table and includes a main counterweight and a secondary counterweight arranged independently of each other, wherein the main counterweight and the secondary counterweight are both connected to the rotary table, and the secondary counterweight is arranged on a side, facing a slewing center of the rotary table, of the main counterweight.
• two independent counterweights i.e., a main counterweight and a secondary counterweight, are formed, wherein the main counterweight is connected to a rotary table, while the secondary counterweight is arranged on a side, facing a slewing center of the rotary table, of the main counterweight, that is, the secondary counterweight is located on an inner side of the main counterweight.
• the counterweight apparatus includes a main counterweight 2 and a secondary counterweight 3 arranged independently of each other, wherein the main counterweight 2 and the secondary counterweight 3 are both connected to the rotary table 1, and the secondary counterweight 3 is arranged on a side, facing a slewing center 12 of the rotary table 1, of the main counterweight 2.
• a weight range of the secondary counterweight 3 is adaptively adjusted according to the tonnage of lifting vehicles, and the secondary counterweight 3 is suitable for different vehicle models such as truck cranes and crawler cranes.
• the main counterweight and the secondary counterweight are arranged independently, the main counterweight 2 can be separately removed during transfer, and the main counterweight 2 is placed in a free position in a middle portion of a vehicle, with no need of removing the secondary counterweight 3, thereby greatly reducing the difficulty in demounting and mounting.
• the secondary counterweight 3 is located on an inner side of the main counterweight 2, and will not extend beyond a vehicle during transfer, thereby preventing over-length driving of a vehicle, satisfying requirements of road transportation, and reducing tediousness of operation. In this way, the main counterweight and the secondary counterweight can both be transported with a vehicle with no need of separate transfer, and the operation is convenient.
• the center of gravity of the main counterweight and the secondary counterweight is relatively close to the slewing center 12, that is, the center of gravity is shifted inwards, thereby greatly improving the safety performance of the counterweight apparatus and eliminating potential safety hazards during operation.
• the counterweight apparatus can be applied to lifting machines such as a truck crane and a crawler crane, and can also be applied to engineering vehicles such as an aerial work vehicle. It should be noted that, in terms of the placement position of the counterweight apparatus as shown in Fig. 1 and Fig. 3 , the left and right directions in the figures are referred to as the left and right orientations, the side close to the slewing center 12 of the rotary table 1 in the figures is referred to as the inner side, and the side away from the slewing center 12 of the rotary table 1 in the figures is referred to as the outer side.
• the counterweight apparatus further includes a first mounting-and-demounting apparatus, wherein the first mounting-and-demounting apparatus is detachably connected to the secondary counterweight 3, and the first mounting-and-demounting apparatus is configured to drive the secondary counterweight 3 to move to a first preset mounting position, and the first preset mounting position is located on the rotary table 1.
• the secondary counterweight 3 can be placed on a frame 8 of a crane using a lifting structure of the crane, and the secondary counterweight 3 waits to be mounted.
• the rotary table 1 rotates to be aligned with the secondary counterweight 3, and the first mounting-and-demounting apparatus drives the secondary counterweight 3 to move until the secondary counterweight 3 contacts with the rotary table 1 and reaches the first preset mounting position.
• the secondary counterweight 3 and the rotary table 1 are locked to complete the mounting of the secondary counterweight 3.
• the secondary counterweight 3 and the rotary table 1 are unlocked, and the first mounting-and-demounting apparatus drives the secondary counterweight 3 to be separated from the rotary table 1 until the secondary counterweight 3 is supported on the frame 8. Then, the lifting structure of a crane is used to lift out the secondary counterweight 3 to demount the secondary counterweight 3.
• the first mounting-and-demounting apparatus includes a first jacking assembly 4; as shown in Fig. 1 , the first jacking assembly 4 is arranged below the secondary counterweight 3, the first jacking assembly 4 is detachably connected to the secondary counterweight 3, and the first jacking assembly 4 is configured to drive the secondary counterweight 3 to move up and down.
• the up and down directions in the figure are the up and down orientations.
• the first jacking assembly 4 includes a jacking cylinder 41 and a support base 42, wherein the support base 42 is fixedly mounted on the frame 8, such as by welded connection or bolted connection.
• a cylinder base of the jacking cylinder 41 is fixedly connected to the support base 42, thereby fixing the jacking cylinder 41 to the frame 8.
• the support base 42 is further provided with a through hole allowing a piston rod of the jacking cylinder 41 to pass through, such that the jacking cylinder 41 can jack up the secondary counterweight 3.
• the jacking assembly is not limited to the above oil cylinder, but may also be an air cylinder, an electric cylinder, a hoisting apparatus and other apparatuses, and adaptive adjustments are made to achieve a jacking effect on the secondary counterweight 3.
• the jacking assembly can realize a self-demounting design of the secondary counterweight 3, and has advantages of simple structure, reliable operation, relatively low cost, capability in fully utilizing the mounting space of the frame 8, and convenience in the arrangement of the jacking assembly.
• the first mounting-and-demounting apparatus includes a first lifting assembly, the first lifting assembly is arranged above the secondary counterweight 3, the first lifting assembly is detachably connected to the secondary counterweight 3, and the first lifting assembly is configured to drive the secondary counterweight 3 to move up and down.
• the first lifting assembly can be mounted on the rotary table 1 and is placed above the secondary counterweight 3.
• first lifting assemblies are arranged on both sides of the secondary counterweight 3, so as to lift the secondary counterweight 3 smoothly and reliably, and mount and demount the secondary counterweight 3 by lifting the secondary counterweight 3.
• the first lifting assembly may adopt an air cylinder, an oil cylinder or the like, and adaptive adjustments may be made to achieve a lifting effect on the secondary counterweight 3 with reference to the relevant prior art.
• the counterweight apparatus also includes a second mounting-and-demounting apparatus; as shown in Fig. 1 , the second mounting-and-demounting apparatus is detachably connected to the main counterweight 2, the second mounting-and-demounting apparatus is configured to drive the main counterweight 2 to move to a second preset mounting position, and the second preset mounting position is located on the rotary table 1.
• the main counterweight 2 can be self-demounted by using a lifting structure of the crane itself, with no need of using other auxiliary lifting devices, thereby avoiding affecting the construction progress and facilitating operation.
• the second lifting assembly 5 includes a lifting cylinder 51, a connecting flange of the lifting cylinder 51 is connected to a bottom plate of the hoisting apparatus 11, and the bottom plate of the hoisting apparatus 11 is provided with a through hole allowing a piston rod of the lifting cylinder 51 to pass through.
• the piston rod movably extends into the interior of the main counterweight 2 and can be kept locked by a locking mechanism arranged inside the main counterweight 2, so as to reliably lift the main counterweight 2.
• the locking mechanism is not shown in the figures and is a mature prior art, so its specific structure and the like will not be repeated redundantly herein.
• the lifting assembly is not limited to the above cylinder, but can also be an air cylinder, an electric cylinder, a hoisting apparatus and other apparatuses, and adaptive adjustments are made to achieve a lifting effect on the main counterweight 2.
• the secondary counterweight 3 is configured to have an arc-shaped structure, and an arc-shaped surface 21 matched with the arc-shaped structure is arranged on a side, facing the secondary counterweight 3, of the main counterweight 2.
• a mounting gap 6 is formed between the secondary counterweight 3 and the main counterweight 2.
• the secondary counterweight 3 and the main counterweight 2 are arranged at intervals, such that a certain mounting gap is reserved between the secondary counterweight 3 and the main counterweight 2, thereby eliminating the influence of manufacturing error and mounting error, etc., avoiding interference and friction between the secondary counterweight 3 and the main counterweight 2 during mounting, and facilitating mounting.
• the size of the mounting gap 6 is specifically determined according to the actual design requirements.
• the fixing plate 72 is provided with a through hole matched with the bolt, the bolt passes through the through hole, and the bolt can be pre-mounted on the fixing plate 72 via a mounting nut, so as to prevent loss of the bolt and facilitate rapid mounting.
• the rotary table 1 is fixedly provided with a hanging plate 13, and the hanging plate 13 can be welded to the rotary table 1 to improve stability of connection.
• the hanging plate 13 is provided with a mounting hole matched with the bolt. In a process of mounting the secondary counterweight 3, when the secondary counterweight 3 rises, the bolt passes through the mounting hole on the hanging plate 13 until the secondary counterweight 3 fits closely with the hanging plate 13. A nut is then mounted for locking.
• a double-nut configuration can also be adopted for anti-loosening treatment, thereby making connection more secure and preventing accidents.
• a hanging plate 13 does not need to be arranged as an adapter on an inner side, and the secondary counterweight 3 is connected through the hanging plate 13, but the secondary counterweight 3 can also be directly connected to the bottom plate of the hoisting apparatus 11.
• connection assemblies 7 are provided. It should be noted that the number and mounting position and the like of the connection assemblies 7 need to be specifically determined according to actual design requirements.
• Fig. 4 as an example, four fixing plates 72 are uniformly arranged on the secondary counterweight 3, and the fasteners 71 are arranged in one-to-one correspondence with the fixing plates 72.
• both sides of the rotary table 1 are provided with hanging plates 13 to strengthen stability of connection with the secondary counterweight 3.
• the through holes on the fixing plate 72 may be configured as waist-shaped holes to eliminate mounting errors and facilitate demounting.
• the secondary counterweight 3 is also provided with lifting lugs 31 to facilitate connection with a lifting device. Specifically, the lifting lugs 31 are symmetrically arranged on the secondary counterweight 3 to ensure lifting balance.
• embodiments of the present application provide a counterweight apparatus adapted to be connected to a rotary table 1, and the counterweight apparatus specifically includes a main counterweight 2, a secondary counterweight 3, a first mounting-and-demounting apparatus, and a second mounting-and-demounting apparatus, etc.
• the rotary table 1 of a crane is connected with two independent counterweights, i.e., a main counterweight 2 and a secondary counterweight 3.
• the main counterweight 2 is connected to a hoisting apparatus 11 on the rotary table 1, and the secondary counterweight 3 is arranged on a side, facing the slewing center 12 of the rotary table 1, of the main counterweight 2, i.e., the secondary counterweight 3 is located on an inner side of the main counterweight 2.
• the secondary counterweight 3 and the main counterweight 2 are respectively provided with independent self-demounting systems, i.e., a first mounting-and-demounting apparatus and a second mounting-and-demounting apparatus.
• first mounting-and-demounting apparatus being a first jacking assembly 4
• second mounting-and-demounting apparatus being a second lifting assembly 5
• the first jacking assemblies 4 are arranged on both sides of the secondary counterweight 3
• the second lifting assemblies 5 are arranged on both sides of the main counterweight 2.
• the jacking cylinder 41 is mounted on the frame 8 and is located below the secondary counterweight 3.
• a free end of the jacking cylinder 41 movably extends into a limit groove in the secondary counterweight 3 for raising and lowering the secondary counterweight 3.
• the lifting cylinder 51 is mounted on the rotary table 1 and is located above the main counterweight 2.
• a free end of the lifting cylinder 51 movably extends into the inside of the main counterweight 2 and is kept locked by a locking mechanism inside the main counterweight 2, so as to raise and lower the main counterweight 2.
• the free end of the lifting cylinder 51 may also be provided with an annular flange, such that the locking mechanism can be lapped over the annular flange when the main counterweight 2 is lifted, in order to improve solidity of the lifting operation.
• the secondary counterweight 3 is configured to have an arc-shaped structure, an arc-shaped surface 21 matched with the arc-shaped structure is arranged on a side, facing the secondary counterweight 3, of the main counterweight 2, and a mounting gap 6 is formed between the secondary counterweight 3 and the main counterweight 2 to facilitate mounting and demounting of the two independent counterweights, and to avoid interference and the like between the main counterweight and the secondary counterweight.
• the secondary counterweight 3 is also pre-mounted with bolts so as to be connected to the hanging plate 13, thereby preventing accidental loss of the bolts and improving the mounting efficiency.
• the lifting cylinder 51 feeds the main counterweight 2 beneath the hoisting apparatus 11, and they are connected by bolts or pins to realize self-demounting of the main counterweight 2.
• the secondary counterweight 3 is placed on the frame 8, and the jacking cylinder 41 feeds the secondary counterweight 3 beneath the hanging plate 13.
• the pre-mounted bolt on the secondary counterweight 3 passes through the hanging plate 13.
• the nuts are locked, such that the secondary counterweight 3 is self-demounted.
• the lifting capacity of a crane can be fully ensured through the main counterweight and the secondary counterweight, meanwhile, the secondary counterweight 3 can be separately mounted on an inner side of the main counterweight 2, thereby avoiding the entire counterweight apparatus from extending beyond the scope of a frame, satisfying the requirements of road transportation, with no need of repeated mounting and demounting.
• the structure is simple, making it convenient for the counterweights of a crane to be carried with the vehicle, and the safety performance is much higher than that of a traditional counterweight that is cantilevered and suspended on a hoisting box.
• all the counterweights can be self-demounted, with no need of relying on other cranes or driving vehicles and other auxiliary devices, thereby saving time and effort and facilitating operation.
• the first mounting-and-demounting apparatus and the second mounting-and-demounting apparatus can be reasonably configured according to actual needs.
• the first mounting-and-demounting apparatus does not need to be arranged, and the secondary counterweight 3 can be directly placed on the frame 8 using other devices such as a forklift, and can be locked in alignment with the position to be mounted on the rotary table 1.
• the first mounting-and-demounting apparatus and the second mounting-and-demounting apparatus can be used to achieve self-demounting of independent counterweights, thereby facilitating operation and effectively ensuring the construction progress.
• Embodiments of the present application also provide an operation machine, specifically, the operation machine is, for example, a truck crane, a crawler crane, and the like.
• the operation machine includes a counterweight apparatus in various embodiments described above.
• two independent counterweights namely, a main counterweight and a secondary counterweight, are formed, wherein the main counterweight 2 is connected to the rotary table 1, and the secondary counterweight 3 is arranged on a side, facing the slewing center 12 of the rotary table 1, of the main counterweight 2, i.e., the secondary counterweight 3 is located on an inner side of the main counterweight 2.
• the lifting capacity of a crane can be fully ensured through the main counterweight and the secondary counterweight.
• the secondary counterweight 3 is mounted separately on an inner side of the main counterweight 2, the main counterweight 2 can be separately removed, and the secondary counterweight 3 will not extend beyond a vehicle during transfer, thereby avoiding a problem of difficulty in removing the entire counterweight, satisfying the requirements of road transportation, and facilitating operation and transfer.
• the derivation process of the beneficial effect is roughly similar to that of the beneficial effect of the above counterweight apparatus, and will not be repeated redundantly herein.
• the counterweight apparatus is not limited to being applied to the above lifting machinery such as truck cranes and crawler cranes.
• the counterweight apparatus can also be applied to engineering vehicles such as operating vehicles. In other words, it is acceptable as long as the counterweight apparatus in the present application can be used.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Jib Cranes (AREA)

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• 2023
  • 2023-10-31 CN CN202311439570.6A patent/CN117383450A/zh active Pending
• 2024
  • 2024-06-20 EP EP24883615.7A patent/EP4606758A4/de active Pending
  • 2024-06-20 WO PCT/CN2024/100377 patent/WO2025091943A1/zh active Pending

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