Counterweight system and crane

Abstract

The utility model provides a counterweight system and a crane, and the counterweight system comprises a counterweight trolley which is used for balancing a hoisting moment generated when the crane hoists a target object; one end of the telescopic assembly is hinged to the rotary table, the other end of the telescopic assembly is hinged to the balance weight trolley, and the telescopic assembly can stretch out and draw back so that the balance weight trolley can move to adjust the balance weight radius to balance the hoisting moment of the crane, the operation mode that in the prior art, the hoisting moment is adjusted only by reversing the balance weight through auxiliary hoisting equipment is avoided, time is saved, and the hoisting efficiency is improved. The operation efficiency of the crane is also improved; in addition, the counterweight system further comprises an oil cylinder, one end of the oil cylinder is hinged to the rotary table, the other end of the oil cylinder is hinged to the telescopic assembly, the pitching angle of the telescopic assembly can be adjusted through the oil cylinder, so that the end of the telescopic assembly is connected with the rotary table or the counterweight trolley, and the installation efficiency of the telescopic assembly is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cranes, in particular to a counterweight system and a crane. BACKGROUND

[0002] For a crawler crane configured in an overhauling condition, the counterweight torque needs to be adjusted to meet the stability requirements of different working conditions in order to ensure the safety and balance of hoisting.

[0003] When adjusting the counterweight torque, the weight of the counterweight and / or the radius of the counterweight can be adjusted. However, in the prior art, only the weight of the counterweight can be adjusted, and the radius of the counterweight cannot be adjusted. Moreover, when the weight of the counterweight is increased or decreased, the counterweight needs to be reversed by using auxiliary hoisting equipment, which takes a long time and seriously affects the working efficiency of the large-tonnage crane. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides a counterweight system which improves the working efficiency of a crane. In addition, the present application also provides a crane comprising the above counterweight system.

[0005] To achieve the above object, the present application provides the following technical solutions:

[0006] A counterweight system is suitable for a crane, wherein the crane comprises a rotating platform, and the counterweight system comprises:

[0007] a counterweight trolley for balancing the hoisting torque generated when the crane hoists a target object;

[0008] a telescopic assembly hingedly connected at one end to the rotating platform and at the other end to the counterweight trolley and capable of telescoping to adjust the counterweight radius by moving the counterweight trolley;

[0009] a hydraulic cylinder hingedly connected at one end to the rotating platform and at the other end to the telescopic assembly for adjusting the pitch angle of the telescopic assembly.

[0010] Optionally, in the above counterweight system, the outer wall of the telescopic assembly is provided with a first hoisting lug and a second hoisting lug, the rotating platform and the telescopic assembly are hingedly connected through the first hoisting lug, and the hydraulic cylinder and the telescopic assembly are hingedly connected through the second hoisting lug.

[0011] Optionally, in the above counterweight system, the counterweight system further comprises:

[0012] a length sensor arranged on the telescopic assembly for detecting the length of the telescopic assembly;

[0013] A controller is capable of receiving a length signal of the telescopic assembly and controlling the telescoping of the telescopic assembly based on a hoisting load of the crane to adjust the counterweight radius.

[0014] Optionally, in the counterweight system, the counterweight trolley comprises a power source, and the power source is configured to drive the counterweight trolley to move.

[0015] Optionally, in the counterweight system, the counterweight trolley further comprises:

[0016] a counterweight part;

[0017] a moving part arranged at a bottom of the counterweight part and configured to drive the counterweight part to move;

[0018] a rotating mechanism arranged between the moving part and the counterweight part and configured to enable the counterweight part to rotate relative to the moving part.

[0019] Optionally, in the counterweight system, the counterweight part comprises a plurality of counterweight blocks, and the weight of the counterweight part is changed by increasing or decreasing the number of the counterweight blocks.

[0020] Optionally, in the counterweight system, the telescopic assembly comprises a barrel and a telescopic part arranged in the barrel, and the telescopic part is capable of telescoping and sliding relative to the barrel.

[0021] Optionally, in the counterweight system, the counterweight system further comprises:

[0022] two pull plates;

[0023] a super-lifting mast, one end of which is hingedly connected to the rotating table, and the other end of which is connected to the rotating table and the counterweight trolley through the pull plates, respectively.

[0024] A crane comprising the counterweight system according to any one of the preceding items.

[0025] The counterweight system provided by the present application comprises a telescopic assembly connected to the counterweight trolley and capable of telescoping, so that the counterweight radius can be adjusted. That is, when the counterweight trolley moves, the telescopic assembly can telescope, or when the telescopic assembly telescopes, the counterweight trolley can move. In this way, the counterweight trolley adjusts the counterweight radius and the counterweight torque to balance the hoisting torque of the crane. In this way, the operation mode of the prior art, which only adjusts the hoisting torque by reversing the counterweight through auxiliary hoisting equipment, is avoided, thereby saving time and improving the operation efficiency of the crane. In addition, the counterweight system further comprises an oil cylinder, one end of which is hingedly connected to the rotating table, and the other end of which is hingedly connected to the telescopic assembly. The oil cylinder adjusts the pitch angle of the telescopic assembly, so that the end of the telescopic assembly is connected to the rotating table or the counterweight trolley. In this way, the installation efficiency of the telescopic assembly is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description only are a part of the present application, and the other drawings can be obtained by those skilled in the art without any creative effort on the basis of the accompanying drawings provided.

[0027] Fig. 1 A structural schematic diagram of a counterweight system provided by an embodiment of the present application;

[0028] Fig. 2 A schematic diagram of a telescopic assembly provided with a length sensor according to an embodiment of the present application;

[0029] Fig. 3 A structural schematic diagram of a counterweight trolley provided by an embodiment of the present application.

[0030] In Figs. 1-3 which:

[0031] 1, rotary table; 2, counterweight trolley; 3, telescopic assembly; 4, oil cylinder; 5, length sensor; 6, counterweight part; 7, moving part; 8, first lifting lug; 9, second lifting lug; 10, pull plate; 11, super-lifting mast; 12, hanger body. DETAILED DESCRIPTION

[0032] The present application provides a counterweight system, which improves the operation efficiency of a crane. In addition, the present application also provides a crane comprising the counterweight system.

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative effort fall within the scope of protection of the present application.

[0034] As Figs. 1-3As shown, the embodiment of the present application provides a counterweight system for balancing the lifting moment generated when the crane lifts the target object, the crane comprising a rotary table 1. The counterweight system comprises a counterweight trolley 2 for balancing the lifting moment generated when the crane lifts the target object to maintain the stability of the crane, and a telescopic assembly 3, one end of which is hinged to the rotary table 1 and the other end is hinged to the counterweight trolley 2, so that the counterweight trolley 2 and the rotary table 1 are connected together, wherein the telescopic assembly 3 can be telescopic, and it needs to be noted that the telescopic assembly 3 itself can be telescopic to drive the counterweight trolley 2 to be telescopic, or the counterweight trolley 2 moves to drive the telescopic assembly 3 to be telescopic, or the counterweight trolley 2 moves and the telescopic assembly 3 can be telescopic synchronously, at this time the driving force for driving the counterweight trolley 2 to move and the driving force for driving the telescopic assembly 3 to be telescopic are different, so that the counterweight radius is adjusted through the movement of the counterweight trolley 2, and the balance of the counterweight moment and the lifting moment is realized.

[0035] In summary, the telescopic assembly 3 is provided, so that the counterweight radius can be adjusted, thus avoiding the operation mode in the prior art that only the auxiliary hoisting equipment is used to reverse the counterweight to adjust the lifting moment, which not only saves time, but also improves the operation efficiency of the crane.

[0036] It also needs to be noted that the movement of the counterweight trolley 2 can be close to the rotary table 1 or away from the rotary table 1, and the specific movement direction is determined according to the requirement.

[0037] Further, the counterweight system further comprises an oil cylinder 4, one end of which is hinged to the rotary table 1 and the other end is hinged to the telescopic assembly 3, for adjusting the pitch angle of the telescopic assembly 3. When the telescopic assembly 3 is installed, one end of the telescopic assembly 3 needs to be hinged to the rotary table 1 and the other end needs to be hinged to the counterweight trolley 2. The oil cylinder 4 has a certain tension on the telescopic assembly 3, so that it maintains a certain height. In this process, the end of the telescopic assembly 3 is difficult to be connected to the rotary table 1 or the counterweight trolley 2, for example, the hinged part of the end of the telescopic assembly 3 is higher or lower than the hinged part of the counterweight trolley 2, or the hinged part of the end of the telescopic assembly 3 is higher or lower than the hinged part of the rotary table 1, at this time the telescopic assembly 3 end hinged part is raised or lowered by the telescopic piston rod of the oil cylinder 4 to realize the hinging of the telescopic assembly 3 and the counterweight trolley 2 or the rotary table 1, and the installation efficiency of the telescopic assembly 3 is improved.

[0038] In other optional embodiments, in addition to the oil cylinder 4, an electric push rod, a hydraulic cylinder or a pneumatic cylinder can also be used to replace the oil cylinder 4.

[0039] In some optional embodiments, the counterweight system further comprises a length sensor 5 arranged on the telescopic assembly 3 for detecting the length of the telescopic assembly 3; and a controller capable of receiving the length signal of the telescopic assembly 3 and controlling the telescoping of the telescopic assembly 3 based on the lifting load of the crane to adjust the counterweight radius. When the crane lifts the target object, the target object will be replaced, and the lifting moment generated by the crane when lifting the target object will also be different, so the counterweight radius needs to be adjusted at this time to balance the lifting moment. After the length sensor 5 detects the length of the telescopic assembly 3, the length signal is transmitted to the controller, and the controller can adjust the counterweight radius according to the length signal and the lifting load. The adjustment method can be to use the power on the crane to drive the counterweight trolley 2 to move, or when the telescopic assembly 3 can automatically telescope, the controller is in communication connection with the telescopic assembly 3 to control the telescoping of the telescopic assembly 3. Through the arrangement of the length sensor 5, the accuracy of the counterweight radius adjustment is improved, and the influence of the counterweight radius adjustment on the stability of the crane when the counterweight radius adjustment is not in place is avoided, and the safety of the crane is improved.

[0040] It should be noted that the length sensor 5 can be a common sensor for length measurement such as a laser ranging sensor, an ultrasonic sensor or a pull rope sensor.

[0041] In some optional embodiments, the counterweight trolley 2 comprises a power source for driving the counterweight trolley 2 to move. The counterweight trolley 2 has its own power, which means that the counterweight trolley 2 can move autonomously, so that the counterweight trolley 2 can walk alone when the crane is transferred, thereby improving the flexibility of the counterweight trolley 2 when the crane is transferred and saving the occupied space when the crane is transferred.

[0042] In other optional embodiments, the walking power of the counterweight trolley 2 comes from the crane, or the emergency pump station of the lifting site provides power for the movement of the counterweight trolley 2.

[0043] The further counterweight trolley 2 further comprises: a counterweight part 6; a moving part 7 arranged at the bottom of the counterweight part 6 to drive the counterweight part 6 to move; and a rotating mechanism arranged between the moving part 7 and the counterweight part 6 to enable the counterweight part 6 to rotate relative to the moving part 7. The counterweight trolley 2 is sequentially arranged from bottom to top as the moving part 7, the rotating mechanism and the counterweight part 6, wherein the moving part 7 comprises movable rollers or tracks to facilitate the movement of the counterweight trolley 2. It should be noted that the hinge position of the counterweight trolley 2 and the telescopic assembly 3 is located at the counterweight part 6. In some examples of the present application, the counterweight part 6 comprises a counterweight block and a connecting platform for supporting the counterweight block, and the telescopic assembly 3 is hinged to the connecting platform. The counterweight part 6 can rotate relative to the moving part 7. When the counterweight system balances the hoisting torque, the counterweight trolley 2 moves to the target position, and the hinge point of the connecting platform and the hinge point of the telescopic assembly 3 are misaligned, so the two cannot be hinged. At this time, the rotating mechanism drives the connecting platform to rotate, so that the hinge point of the connecting platform and the hinge point of the telescopic assembly 3 are aligned, thereby hinging the telescopic assembly 3 and the connecting platform. In this way, the counterweight trolley 2 avoids repeated movement when hinged to the telescopic assembly 3, thereby improving the work efficiency.

[0044] The counterweight part 6 comprises a plurality of counterweight blocks, and the number of the counterweight blocks is increased or decreased to change the weight of the counterweight part 6. When adjusting the hoisting torque of the crane, the counterweight trolley 2 cannot move conveniently in the hoisting site, or the counterweight trolley 2 cannot balance the hoisting torque within a limited moving range. In this case, the hoisting torque can be balanced by increasing or decreasing the counterweight blocks and changing the weight of the counterweight part 6. In this way, the flexibility and practicability of the counterweight system are improved.

[0045] It should be noted that the counterweight block can be a tray.

[0046] In some optional embodiments, the telescopic assembly 3 comprises a cylinder and a telescopic part arranged in the cylinder, and the telescopic part can slide relative to the cylinder. The telescopic assembly 3 can be a concentric sleeve or a nested sliding cylinder, such as an oil cylinder 4, a spring-loaded telescopic device or a linear bearing and guide rod combination.

[0047] Further, the outer wall of the cylinder is provided with a first hoisting lug 8 and a second hoisting lug 9, and the rotating table 1 and the telescopic assembly 3 are hinged through the first hoisting lug 8, and the oil cylinder 4 and the telescopic assembly 3 are hinged through the second hoisting lug 9. The first hoisting lug 8 is arranged on the outer wall of the cylinder in the direction towards the rotating table 1, and the second hoisting lug 9 is arranged on the outer wall of the cylinder in the direction towards the oil cylinder 4. First and second through holes are respectively arranged on the first and second hoisting lugs 8 and 9. The rotating table 1 and the telescopic assembly 3 are hinged by passing a pin through the first through hole and the rotating table 1, and the oil cylinder 4 and the telescopic assembly 3 are hinged by passing a pin through the second through hole and the end of the oil cylinder 4. The hinge is simple and reliable to implement.

[0048] In some optional embodiments, the counterweight system further comprises: two pull plates 10; and a super-lifting mast 11, one end of which is hingedly connected to the rotary table 1, and the other end of which is connected to the rotary table 1 and the counterweight trolley 2 respectively through the pull plates 10. It should be noted that the crane comprises a lifting arm arranged on the rotary table 1, and the lifting arm is used for hoisting the target object. When the lifting arm hoists the target object, the hoisting moment generated will be transmitted to the super-lifting mast 11 through the pull plates 10, and then distributed to the rotary table 1 and the counterweight trolley 2 by the super-lifting mast 11. In this way, the load can be dispersed, and the risk of excessive stress on a single point can be reduced. By moving the counterweight trolley 2, the operator can change the size of the counteracting moment exerted by the counterweight on the rotary table 1. When hoisting a heavy object, the counteracting moment can be increased by increasing the counterweight or moving it closer to the super-lifting mast 11; conversely, when hoisting a light load, the counterweight can be reduced or moved away from the super-lifting mast 11, wherein the counterweight trolley 2 comprises a lifting frame body 12 connected to the pull plates 10.

[0049] The counterweight trolley 2 is connected to the rotary table 1 through the pull plates 10 and the super-lifting mast 11, forming a flexible and adjustable counterweight system. By reasonably configuring the mass and position of the counterweight, the hoisting moment caused by the hoisting of the lifting arm can be effectively balanced, and the stability and safety performance of the crane during the entire working process can be ensured.

[0050] In addition, the embodiment of the present application also provides a crane, which comprises the above-mentioned counterweight system. The beneficial effects brought by the crane of the above-mentioned counterweight system are described above, and will not be repeated here.

[0051] The basic principles of the present application are described above in combination with specific embodiments, but it should be pointed out that the advantages, advantages, effects and the like mentioned in the present application are only examples and cannot be considered as the must-have of each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of example and understanding, and are not limited to the specific details disclosed above.

[0052] The block diagrams of the devices, apparatuses, equipment, systems involved in the present application are only illustrative examples and are not intended to require or imply that the connection, arrangement and configuration shown in the block diagrams must be used. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged and configured in any way. Words such as "include", "contain", "have" and the like are open-ended words, which mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0053] It should also be noted that in the apparatus, device and method of the present application, each component or step can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions within the scope of the present application.

[0054] The above description of the disclosed aspects is given to enable any person skilled in the art to make or use the application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0055] It should be understood that the adjectives "first", "second", "third", "fourth", "fifth" and "sixth" used in the embodiments of the present application are only used for more clearly describing the technical solutions, and cannot be used to limit the protection scope of the present application.

[0056] The above description has been presented for the purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although several example aspects and embodiments have been discussed above, those of ordinary skill in the art will appreciate a variety of modifications, alternatives, permutations, additions, and sub-combinations, which fall within the scope of the application.

Claims

1. A counterweight system, characterized in that, The crane comprises a rotary table (1), a counterweight system comprising: a counterweight trolley (2) for balancing the lifting moment generated when the crane lifts a target object; a telescopic assembly (3) hingedly connected at one end to the rotary table (1) and at the other end to the counterweight trolley (2) and capable of telescoping to adjust the counterweight radius by moving the counterweight trolley (2); a hydraulic cylinder (4) hingedly connected at one end to the rotary table (1) and at the other end to the telescopic assembly (3) for adjusting the pitch angle of the telescopic assembly (3).

2. The counterweight system of claim 1, wherein, The outer wall of the telescopic assembly is provided with a first lifting lug (8) and a second lifting lug (9), the rotary table (1) and the telescopic assembly (3) are hingedly connected through the first lifting lug (8), and the hydraulic cylinder (4) and the telescopic assembly (3) are hingedly connected through the second lifting lug (9).

3. The counterweight system of claim 1, wherein, Further comprising: a length sensor (5) arranged on the telescopic assembly (3) for detecting the length of the telescopic assembly (3); a controller capable of receiving the length signal of the telescopic assembly (3) and controlling the telescoping of the telescopic assembly (3) based on the lifting load of the crane to adjust the counterweight radius.

4. The counterweight system of claim 1, wherein, The counterweight trolley (2) comprises a power source for driving the counterweight trolley (2) to move.

5. The counterweight system of claim 4, wherein, The counterweight trolley (2) further comprises: a counterweight part (6); a moving part (7) arranged at the bottom of the counterweight part (6) to drive the counterweight part (6) to move; a slewing mechanism arranged between the moving part (7) and the counterweight part (6) to enable the counterweight part (6) to rotate relative to the moving part (7).

6. The counterweight system of claim 5, wherein, The counterweight part (6) comprises a plurality of counterweight blocks, and the weight of the counterweight part (6) is changed by increasing or decreasing the number of counterweight blocks.

7. The counterweight system of claim 1, wherein, The telescopic assembly (3) comprises a cylinder and a telescopic member arranged in the cylinder, and the telescopic member can slide relative to the cylinder.

8. The counterweight system of claim 1, wherein, The counterweight system further comprises: two pull plates (10); a super-lifting mast (11) hingedly connected at one end to the rotary table (1) and at the other end connected to the rotary table (1) and the counterweight trolley (2) through the pull plates (10), respectively.

9. A crane, characterized in that The counterweight system comprises any one of the above claims 1-8. The counterweight system comprises any one of the above claims 1-8.

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