Counterweight device and operation machinery

Abstract

The present application relates to the field of engineering machinery, and provides a counterweight apparatus and an operation machine. The counterweight apparatus comprises a main counterweight and a secondary counterweight arranged independently of each other, wherein the main counterweight and the secondary counterweight are both connected to a rotary table, and the secondary counterweight is arranged on a side, facing a slewing center of the rotary table, of the main counterweight. Through such an arrangement, 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. With the main counterweight and the secondary counterweight, the lifting capacity of a crane can be fully ensured. Meanwhile, the secondary counterweight is mounted separately on an inner side of the main counterweight, the main counterweight can be separately removed, and the secondary counterweight 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.

Description

Cross Reference to Related Applications

[0001] The present application claims the priority of the Chinese patent application filed on October 31, 2023 with an application number of 202311439570.6 and entitled "Counterweight Apparatus and Operation machine", the contents of which are incorporated herein by reference in its entirety.Technical Field

[0002] The present application relates to the technical field of engineering machinery, and in particular to a counterweight apparatus and an operation machine.Background

[0003] At present, for lifting machines such as truck cranes and crawler cranes, 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. In the prior art, 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.

[0004] However, the applicant has found that at least the following defects exist in the prior art: during road transportation of a crane, a counterweight will protrude beyond a vehicle, thereby leading to over-length driving of the crane, failing to meet safety requirements of road transportation, and affecting transfer and transportation of a vehicle, and the entire counterweight needs to be removed, however, the overall weight of the counterweight is relatively large, thereby making the operation extremely inconvenient.Summary of the Invention

[0005] 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.

[0006] To achieve the above object, the present application provides a counterweight apparatus for connection with a rotary table, including: 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.

[0007] The counterweight apparatus provided in the present application further includes: a first mounting-and-demounting apparatus detachably connected to the secondary counterweight, wherein the first mounting-and-demounting apparatus is configured to drive the secondary counterweight to move to a first preset mounting position, and the first preset mounting position is located on the rotary table.

[0008] According to the counterweight apparatus provided in the present application, the first mounting-and-demounting apparatus includes: a first jacking assembly arranged below the secondary counterweight, wherein the first jacking assembly is detachably connected to the secondary counterweight, and the first jacking assembly is configured to drive the secondary counterweight to move up and down.

[0009] According to the counterweight apparatus provided in the present application, at least two first jacking assemblies are provided, and the first jacking assemblies are arranged at intervals in a length direction of the secondary counterweight.

[0010] According to the counterweight apparatus provided in the present application, the first mounting-and-demounting apparatus includes: a first lifting assembly arranged above the secondary counterweight, wherein the first lifting assembly is detachably connected to the secondary counterweight, and the first lifting assembly is configured to drive the secondary counterweight to move up and down.

[0011] 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.

[0012] According to the counterweight apparatus provided in the present application, the secondary counterweight is configured to have an arc-shaped structure, and an arc-shaped surface matched with the arc-shaped structure is arranged on a side, facing the secondary counterweight, of the main counterweight.

[0013] According to the counterweight apparatus provided in the present application, a mounting gap is formed between the secondary counterweight and the main counterweight.

[0014] 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.

[0015] The present application further provides an operation machine including the counterweight apparatus as described in any one of the above items.

[0016] The counterweight apparatus provided in the present application is 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. Through such an arrangement, 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. With the main counterweight and the secondary counterweight, the lifting capacity of a crane can be fully ensured. Meanwhile, the secondary counterweight is mounted separately on an inner side of the main counterweight, the main counterweight can be separately removed, and the secondary counterweight 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.Brief Description of the Drawings

[0017] To more clearly illustrate technical solutions in the present application or in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly introduced below. Apparently, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort. Fig. 1 is a structural schematic diagram of a counterweight apparatus provided in the present application; Fig. 2 is a structural schematic diagram of a first jacking assembly provided in the present application; Fig. 3 is a schematic diagram showing positions of a main counterweight and a secondary counterweight provided in the present application; Fig. 4 is a first structural schematic diagram of a secondary counterweight provided in the present application; Fig. 5 is a second structural schematic diagram of a secondary counterweight provided in the present application.

[0018] Reference numerals in the figures: 1: rotary table; 11: hoisting apparatus; 12: slewing center; 13: hanging plate; 2: main counterweight; 21: arc-shaped surface; 3: secondary counterweight; 31: lifting lug; 32: notch; 4: first jacking assembly; 41: jacking cylinder; 42: support base; 5: second lifting assembly; 51: lifting cylinder; 6: mounting gap; 7: connection assembly; 71: fastener; 72: fixing plate; 8: frame.Detailed Description of the Embodiments

[0019] In order to make the object, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in combination with the accompanying drawings in the present application, and apparently, the described embodiments are merely a part but not all of the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative effort shall all fall within the protection scope of the present application.

[0020] The counterweight apparatus of the present application will be described below in combination with Fig. 1 to Fig. 5.

[0021] As shown in Fig. 1 to Fig. 5, embodiments of the present application provide a counterweight apparatus for connection with a rotary table 1 to increase a lifting capacity of a crane. Specifically, as shown in Fig. 1, 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.

[0022] Specifically, as shown in Fig. 1, an outer edge of the rotary table 1 is provided with a hoisting apparatus 11, and the main counterweight 2 can be connected to a box of the hoisting apparatus 11, for example, via bolts or pins, such that the main counterweight 2 is suspended on the hoisting apparatus 11, and the main counterweight 2 can rotate along with the rotary table 1 to complete the lifting operation. Further, as shown in Fig. 3, the secondary counterweight 3 is independent of the main counterweight 2 and 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 a left side of the main counterweight 2. It should be noted that 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. In this way, on the one hand, through a combination of a main counterweight and a secondary counterweight, the requirements of a total weight of the counterweights can be satisfied and the lifting performance of a crane is ensured; on the other hand, 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. In addition, compared with a traditional counterweight which is cantilevered and suspended on a hoisting box, 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.

[0023] 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.

[0024] In the embodiment of the present application, 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. Specifically, when a secondary counterweight 3 needs to be mounted, firstly, 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. Then 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. At this time, the secondary counterweight 3 and the rotary table 1 are locked to complete the mounting of the secondary counterweight 3. When the secondary counterweight 3 needs to be demounted, 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.

[0025] Through such an arrangement, the secondary counterweight 3 can be self-demounted by cooperation with a first mounting-and-demounting apparatus, with no need of using other cranes or driving vehicles and other auxiliary devices, thereby saving time and effort, allowing quick operation, ensuring construction progress, and being especially suitable for application scenarios with limited working sites and inconvenience for other auxiliary facilities to enter the site. Of course, in other embodiments, the secondary counterweight 3 can also be placed on a frame 8 with a forklift or other mechanisms, and can be locked in alignment with the first preset mounting position on the rotary table 1, and the first mounting-and-demounting apparatus does not need to be arranged.

[0026] In some embodiments of the present application, 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. It should be noted that, in terms of the placement position of the counterweight apparatus as shown in Fig. 1, the up and down directions in the figure are the up and down orientations.

[0027] Specifically, as shown in Fig. 2, 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. During mounting, the secondary counterweight 3 is placed above the jacking cylinder 41, and the piston rod of the jacking cylinder 41 rises, so as to jack up the secondary counterweight 3 until the secondary counterweight 3 fits with the rotary table 1 for fastening connection. Then the piston rod of the jacking cylinder 41 is lowered, thereby completing the mounting and awaiting subsequent operations. In addition, a limit groove matched with the piston rod may be arranged on a lower surface of the secondary counterweight 3, and the piston rod movably extends into the limit groove to play a limiting and guiding role, thereby facilitating a stable and reliable jacking operation. Of course, in other embodiments, 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.

[0028] Through such an arrangement, 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.

[0029] In an optional embodiment of the present application, at least two first jacking assemblies 4 are provided, and the first jacking assemblies 4 are arranged at intervals in a length direction of the secondary counterweight 3. Specifically, as shown in Fig. 2, two first jacking assemblies 4 are arranged, and the two first jacking assemblies 4 are respectively arranged on both sides of the frame 8. As shown in Fig. 3, the two first jacking assemblies 4 are symmetrically distributed along a length direction of the secondary counterweight 3, so as to stably and reliably jack up the secondary counterweight 3. It should be noted that, in terms of the placement position of the counterweight apparatus as shown in Fig. 3, the up and down directions in the figures are the length direction of the secondary counterweight 3. Through such an arrangement, a plurality of first jacking assemblies 4 can improve safety stability of the jacking operation and reliably support the secondary counterweight 3.

[0030] In some other embodiments of the present application, 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. Specifically, as shown in Fig. 1, the first lifting assembly can be mounted on the rotary table 1 and is placed above the secondary counterweight 3. Moreover, 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. It should be noted that 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.

[0031] In specific embodiments of the present application, 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. Through such an arrangement, by cooperation with the second mounting-and-demounting apparatus, 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.

[0032] In some embodiments, the second mounting-and-demounting apparatus includes a second lifting assembly 5, and the second lifting assembly 5 can be mounted on the rotary table 1 and is placed above the main counterweight 2. The second lifting assembly 5 is detachably connected to the main counterweight 2, and the second lifting assembly 5 is configured to drive the main counterweight 2 to move up and down, such that the main counterweight 2 contacts with or is separated from the rotary table 1. Moreover, the second lifting assemblies 5 are arranged on both sides of the main counterweight 2, so as to lift the main counterweight 2 smoothly and reliably, and mount and demount the main counterweight 2 by lifting the main counterweight 2. Specifically, as shown in Fig. 1, 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. It should be noted that 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. Of course, 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.

[0033] In some other embodiments, the second mounting-and-demounting apparatus includes a second jacking assembly, wherein the second jacking assembly can be mounted on a frame 8 and is placed below the main counterweight 2. The second jacking assembly is detachably connected to the main counterweight 2, and the second jacking assembly is configured to drive the main counterweight 2 to move up and down, such that the main counterweight 2 contacts with or is separated from the rotary table 1. Moreover, the second lifting assemblies are arranged on both sides of the main counterweight 2, so as to lift the main counterweight 2 smoothly and reliably, and mount and demount the main counterweight 2 by lifting the main counterweight 2. It should be noted that the second jacking assembly may adopt an air cylinder, an oil cylinder or the like, and adaptive adjustments may be made with reference to the relevant prior art, in order to realize a jacking effect on the main counterweight 2.

[0034] As an optional embodiment of the present application, as shown in Fig. 3, 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. Through such an arrangement, slewing movement of the rotary table 1, the secondary counterweight 3 and the main counterweight 2 during mounting and demounting is facilitated, and collision does not easily occur during relative rotation of the rotary table 1, the secondary counterweight 3 and the main counterweight 2, and a distance between the slewing center 12 of the rotary table 1 and the secondary counterweight 3 and a distance between the slewing center 12 of the rotary table 1 and the main counterweight 2 are reduced, such that the structure is more compact, the layout is more reasonable, and the occupied space is reduced.

[0035] In an optional embodiment of the present application, as shown in Fig. 3, a mounting gap 6 is formed between the secondary counterweight 3 and the main counterweight 2. Through such an arrangement, 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. It should be noted that the size of the mounting gap 6 is specifically determined according to the actual design requirements.

[0036] In specific embodiments of the present application, the counterweight apparatus further includes a connection assembly 7, wherein the connection assembly 7 is arranged on the secondary counterweight 3, and the connection assembly 7 is configured to connect the secondary counterweight 3 to the rotary table 1. Specifically, as shown in Fig. 5, the connection assembly 7 includes a fastener 71 and a fixing plate 72, wherein a bolt and the like can be selected as a fastener. The secondary counterweight 3 is provided with a notch 32 matched with the fixing plate 72, and the fixing plate 72 is fixedly mounted in the notch 32, for example, via welded connection or the like, and a certain mounting space is reserved for the fasteners 71 at the notch 32, so as to facilitate insertion of the bolt. 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. In order to prevent the connection from loosening, a double-nut configuration can also be adopted for anti-loosening treatment, thereby making connection more secure and preventing accidents. Of course, in other embodiments, if a sufficient space is reserved at the hoisting apparatus 11 at a tail end of the rotary table 1, 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.

[0037] Further, in order to reliably mount the secondary counterweight 3 on the rotary table 1, at least two 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. With 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. Moreover, both sides of the rotary table 1 are provided with hanging plates 13 to strengthen stability of connection with the secondary counterweight 3. In order to facilitate mounting, the through holes on the fixing plate 72 may be configured as waist-shaped holes to eliminate mounting errors and facilitate demounting. In addition, 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.

[0038] In summary, 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. Specifically, 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.

[0039] Meanwhile, 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. With the first mounting-and-demounting apparatus being a first jacking assembly 4 and the second mounting-and-demounting apparatus being a second lifting assembly 5 as an example for illustration, the first jacking assemblies 4 are arranged on both sides of the secondary counterweight 3, and the second lifting assemblies 5 are arranged on both sides of the main counterweight 2. In the first jacking assembly 4, 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. In the second lifting assembly 5, 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.

[0040] Further, 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. In addition, 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.

[0041] During mounting, in cooperation with a lifting device of a crane, 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. Meanwhile, in cooperation with a lifting device of the crane, 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. When the secondary counterweight 3 rises, the pre-mounted bolt on the secondary counterweight 3 passes through the hanging plate 13. When the secondary counterweight 3 rises to the highest position, the nuts are locked, such that the secondary counterweight 3 is self-demounted. Of course, if a sufficient space is reserved at the hoisting apparatus 11 at a tail end of the rotary table 1, then an adapter structure such as a hanging plate 13 does not need to be arranged, and the secondary counterweight 3 can be directly connected to the bottom plate of the hoisting apparatus 11.

[0042] Through such an arrangement, 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. Moreover, 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. Of course, in practical applications, the first mounting-and-demounting apparatus and the second mounting-and-demounting apparatus can be reasonably configured according to actual needs. For example, when the environment on a construction site allows, 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. When the space in a construction site is limited, it is inconvenient for other devices to enter the site, then 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.

[0043] The operation machine provided by the present application is described below, and the operation machine described below may be cross-referenced to the counterweight apparatus described above.

[0044] 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. Wherein, the operation machine includes a counterweight apparatus in various embodiments described above. Through such an arrangement, 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. Meanwhile, 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. It should be noted that in the embodiments of the present application, the counterweight apparatus is not limited to being applied to the above lifting machinery such as truck cranes and crawler cranes. For example, 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.

[0045] Finally, it should be noted that the above embodiments are merely used to illustrate the technical solutions of the present application, rather than limiting the technical solutions of the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions as recorded in the foregoing embodiments can still be modified, or some of the technical features therein can be equivalently substituted; while these modifications or substitutions do not make the essence of the technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A counterweight apparatus for connection with a rotary table, comprising: 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.

2. The counterweight apparatus according to claim 1, further comprising: a first mounting-and-demounting apparatus detachably connected to the secondary counterweight, wherein the first mounting-and-demounting apparatus is configured to drive the secondary counterweight to move to a first preset mounting position, and the first preset mounting position is located on the rotary table.

3. The counterweight apparatus according to claim 2, wherein the first mounting-and-demounting apparatus comprises: a first jacking assembly arranged below the secondary counterweight, wherein the first jacking assembly is detachably connected to the secondary counterweight, and the first jacking assembly is configured to drive the secondary counterweight to move up and down.

4. The counterweight apparatus according to claim 3, wherein at least two first jacking assemblies are provided, and the first jacking assemblies are arranged at intervals in a length direction of the secondary counterweight.

5. The counterweight apparatus according to claim 2, wherein the first mounting-and-demounting apparatus comprises: a first lifting assembly arranged above the secondary counterweight, wherein the first lifting assembly is detachably connected to the secondary counterweight, and the first lifting assembly is configured to drive the secondary counterweight to move up and down.

6. The counterweight apparatus according to claim 1, further comprising: 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.

7. The counterweight apparatus according to claim 1, wherein the secondary counterweight is configured to have an arc-shaped structure, and an arc-shaped surface matched with the arc-shaped structure is arranged on a side, facing the secondary counterweight, of the main counterweight.

8. The counterweight apparatus according to claim 1, wherein a mounting gap is formed between the secondary counterweight and the main counterweight.

9. The counterweight apparatus according to claim 1, further comprising: a connection assembly arranged on the secondary counterweight for connecting the secondary counterweight to the rotary table.

10. A operation machine comprising the counterweight apparatus of any one of claims 1-9.

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