Crawler crane and balancing weight luffing device thereof

Abstract

The utility model discloses a crawler crane and a balancing weight luffing device thereof, and the balancing weight luffing device comprises sliding chutes respectively arranged at two ends of the bottom of a rotary table, a chassis arranged below the rotary table, a balancing weight arranged in the chassis, and first oil cylinders arranged at two sides of the rotary table, a plurality of first lug plate sets and a plurality of second lug plate sets are symmetrically arranged at the top of the chassis along the center line, the first lug plate sets are connected with the rotary table through first oil cylinders, the second lug plate sets are slidably connected to the sliding grooves through pulleys hinged to the second lug plate sets, the pulleys are arranged in the sliding grooves, a plurality of fixing holes are formed in the sliding grooves, and second oil cylinders are arranged on one sides of the second lug plate sets. The second oil cylinder comprises a second cylinder barrel fixed to the inner side of the second lug plate set and a second cylinder rod connected into the second cylinder barrel in a sliding mode, and the free end of the second cylinder rod is connected with a locking pin. In the actual using process of the device, by setting the positions and the number of the fixing holes, the amplitude change of the balancing weight can be accurately achieved, and good stability and safety are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of crawler cranes, and particularly relates to a crawler crane and a counterweight variable amplitude device thereof. Background Art

[0002] A crawler crane is a self-propelled crane used for high-rise building construction. It is a luffing crane with a boom that uses crawlers to move. The crawlers have a large contact area with the ground, good passability, strong adaptability, and can travel with a load. It is suitable for lifting operations at construction sites and can perform various operations such as earth excavation, soil ramming, and pile driving. The crawler crane consists of a traveling mechanism, a slewing mechanism, a fuselage, a boom, etc. The traveling mechanism is two chain-type crawlers, and the slewing mechanism is a turntable installed on the chassis, enabling the fuselage to slewing 360°. The lower end of the boom is hinged to the fuselage and slews with the fuselage. A hoisting pulley block is provided at the top, and the steel wire rope is connected to the winch inside the fuselage through the hoisting pulley block at the top of the boom. The boom can be made in sections and extended.

[0003] A counterweight is provided on the fuselage of the crawler crane. The counterweight can balance the pulling force when the crane hoists goods. In the prior art, most cranes use counterweights with a fixed amplitude, which limits the boom length and amplitude range of the crane. In addition, even if the position of the counterweight needs to be adjusted, a large amount of manpower and material resources are required, and it takes a long time during the process of disassembling and assembling the counterweight. At the same time, there are certain safety hazards for workers during the process of disassembling and assembling the counterweight. To sum up, there is an urgent need for a safe and convenient crawler crane and a counterweight variable amplitude device thereof. Summary of the Utility Model

[0004] To solve some or all of the technical problems existing in the above prior art, on the one hand, the utility model provides a counterweight variable amplitude device for a crawler crane. A turntable is provided on the crawler crane, and the counterweight variable amplitude device is arranged on the turntable. The counterweight variable amplitude device for the crawler crane includes chutes respectively arranged at both ends of the bottom of the turntable, a chassis arranged below the turntable, a counterweight arranged inside the chassis, and first oil cylinders arranged on both sides of the turntable, wherein:

[0005] A plurality of first ear plate groups and a plurality of second ear plate groups are symmetrically arranged along the center line at the top of the chassis. The first ear plate groups and the turntable are connected by the first hydraulic cylinders. The second ear plate groups are slidably connected to the chute through pulleys connected by hinges. The pulleys are arranged in the chute. A plurality of fixing holes are formed in the chute. A second hydraulic cylinder is arranged on one side of the second ear plate group. The second hydraulic cylinder includes a second cylinder barrel fixed to the inner side of the second ear plate group and a second cylinder rod slidably connected in the second cylinder barrel. The free end of the second cylinder rod is connected with a locking pin. The outer diameter of the locking pin matches the aperture of the fixing hole. The second ear plate group is provided with a first through hole matching the second cylinder rod in a penetrating manner, and the center of the pulley is provided with a second through hole matching the second cylinder rod in a penetrating manner. The apertures of the first through hole and the second through hole both match the aperture of the fixing hole.

[0006] Further, in the above-mentioned counterweight variable amplitude device for a crawler crane, the first ear plate group includes two corresponding first ear plates, the second ear plate group includes two corresponding second ear plates, the chute is arranged between the two corresponding second ear plates, and the second ear plate is slidably connected to the chute through the pulley connected by a hinge.

[0007] Further, in the above-mentioned counterweight variable amplitude device for a crawler crane, the first hydraulic cylinder includes a first cylinder barrel hinged to the turntable and a first cylinder rod hinged to the first ear plate group. The first cylinder rod is slidably sleeved in the first cylinder barrel.

[0008] Further, in the above-mentioned counterweight variable amplitude device for a crawler crane, an oil cylinder seat is arranged on the turntable, and the first cylinder barrel is hinged to the oil cylinder seat.

[0009] Further, in the above-mentioned counterweight variable amplitude device for a crawler crane, the counterweights are arranged at both ends of the chassis, and the turntable is located between the two counterweights.

[0010] As a specific implementation manner, in the above-mentioned counterweight variable amplitude device for a crawler crane, the chute is an I-shaped chute.

[0011] As a specific implementation manner, in the above-mentioned counterweight variable amplitude device for a crawler crane, the number of the fixing holes is 3 - 6.

[0012] As a specific implementation manner, in the above-mentioned counterweight variable amplitude device for a crawler crane, the number of the second ear plate groups is 4 - 8.

[0013] On the other hand, the present invention also provides a crawler crane, and the crawler crane includes the above-mentioned counterweight variable amplitude device.

[0014] The crawler crane and its counterweight luffing device of the present utility model have the following advantages and beneficial effects:

[0015] This device has a simple structure and is convenient for disassembly and assembly. Through the rolling friction between the pulley and the chute, the sliding displacement of the counterweight relative to the slewing platform driven by the chassis is realized. By the telescopic movement of the first oil cylinder, the horizontal position of the counterweight is controlled, achieving the purpose of controlling the counterweight luffing. By the telescopic movement of the second oil cylinder, the locking and unlocking of the locking pin to the fixing hole are realized. Moreover, in the actual use process, by setting the position and quantity of the fixing holes, the change of the counterweight amplitude can be accurately realized, with good stability and safety. The counterweight adjustment method provided by this device can conveniently and efficiently adjust the position of the counterweight to adapt to different working conditions. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only for further understanding of the embodiments of the present utility model and constitute a part of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the counterweight luffing device for the crawler crane of the present utility model;

[0018] Figure 2 is a side view of the counterweight luffing device for the crawler crane of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the second oil cylinder in the counterweight luffing device for the crawler crane of the present utility model;

[0020] Figure 4 is a schematic diagram of the use state of the counterweight luffing device for the crawler crane of the present utility model.

[0021] Description of the Reference Numerals:

[0022] 1 - chute, 11 - first fixing hole, 12 - second fixing hole, 13 - third fixing hole, 2 - chassis, 3 - counterweight, 4 - first oil cylinder, 41 - first cylinder barrel, 42 - first cylinder rod, 43 - oil cylinder seat, 5 - first ear plate group, 6 - second ear plate group, 61 - second ear plate, 7 - second oil cylinder, 71 - second cylinder barrel, 72 - second cylinder rod, 8 - pulley, 9 - locking pin, 100 - slewing platform. Detailed Embodiments

[0023] To make the objectives, technical solutions, and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments of the present utility model and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] As Figures 1 to 4 shown, on the one hand, the present utility model discloses a counterweight variable amplitude device for a crawler crane. A turntable 100 is provided on the crawler crane, and the counterweight variable amplitude device is arranged on the turntable 100. The counterweight variable amplitude device is located at the rear end of the turntable 100. The counterweight variable amplitude device for the crawler crane includes chutes 1 respectively arranged at both ends of the bottom of the turntable 100, a chassis 2 arranged below the turntable 100, a counterweight 3 arranged inside the chassis 2, and first cylinders 4 arranged on both sides of the turntable 100. Among them, a plurality of first ear plate groups 5 and a plurality of second ear plate groups 6 are symmetrically arranged along the center line at the top of the chassis 2. The first ear plate group 5 is connected to the turntable 100 through the first cylinder 4. The second ear plate group 6 is slidably connected to the chute 1 through a hinged pulley 8. The pulley 8 is arranged in the chute 1. When the first cylinder 4 extends, it pushes the chassis 2 to move along the chute 1 in a direction away from the first cylinder 4. When the first cylinder 4 contracts, it pulls the chassis 2 to move along the chute 1 in a direction close to the first cylinder 4. A plurality of fixing holes are opened in the chute 1. A second cylinder 7 is arranged on one side of the second ear plate group 6. The second cylinder 7 includes a second cylinder barrel 71 fixed to the inner side of the second ear plate group 6 through a fastener, a second cylinder rod 72 slidably connected in the second cylinder barrel 71. The free end of the second cylinder rod 72 is connected to a locking pin 9. The outer diameter of the locking pin 9 matches the aperture of the fixing hole. The second ear plate group 6 is provided with a first through hole (not shown in the figure) matching the second cylinder rod 72. The center of the pulley 8 is provided with a second through hole (not shown in the figure) matching the second cylinder rod 72. The axes of the first through hole and the second through hole coincide, and the apertures of the first through hole and the second through hole both match the aperture of the fixing hole. The second cylinder rod 72 slides telescopically in the first through hole and the second through hole. When the second ear plate group 6 slides to the axis of the second through hole coincides with the fixing hole through the pulley 8, the second cylinder rod 72 can push the locking pin 9 into the fixing hole to form the locking of the pulley 8, restricting the radial displacement of the pulley 8. Similarly, the second cylinder rod 72 can also pull the locking pin 9 out of the fixing hole to disengage the locking pin 9 from the fixing hole and release the locking of the pulley 8.

[0025] Furthermore, in the counterweight luffing device for a crawler crane of the utility model, the first ear plate group 5 includes two first ear plates corresponding to each other (not shown in the figure), the second ear plate group 6 includes two second ear plates 61 corresponding to each other, the slide 1 is arranged between the two second ear plates 61 corresponding to each other, and a certain gap is spaced between the two sides of the slide 1 and the second ear plates 61. The second ear plate 61 is slidably connected to the slide 1 through a hinged pulley 8. When the pulley 8 slides, the outer periphery of the pulley 8 rolls against the bottom wall in the slide 1, and the sliding displacement of the chassis 2 relative to the turntable 100 is realized through the rolling friction between the pulley 8 and the slide 1.

[0026] Furthermore, in the counterweight luffing device for a crawler crane of the utility model, the first oil cylinder 4 includes a first cylinder barrel 41 hinged to the turntable 100 and a first cylinder rod 42 hinged to the first ear plate group 5, and the first cylinder rod 42 is slidably sleeved in the first cylinder barrel 41.

[0027] Furthermore, in the counterweight luffing device for a crawler crane of the utility model, a cylinder seat 43 is provided on the turntable 100 , and the first cylinder barrel 41 is hinged to the cylinder seat 43 .

[0028] Furthermore, in the counterweight luffing device for a crawler crane of the utility model, the counterweights 3 are arranged at both ends of the chassis 2, and the turntable 100 is located between the two counterweights 3. Of course, the shape, size, and arrangement of the counterweights 3 need to be set according to specific usage conditions such as the shape and size of the chassis 2 and the restricted height of the construction site during actual use.

[0029] As a specific implementation, in the counterweight block luffing device for a crawler crane of the utility model, the slide 1 is an I-shaped slide. Such a configuration makes the sliding of the pulley 8 in the slide 1 more stable and smooth. Moreover, since pulleys 8 can be arranged on both sides of the I-shaped slide, it has good bearing capacity, thereby ensuring the safety of the counterweight block 3 during the luffing process.

[0030] As a specific implementation, in the counterweight luffing device for a crawler crane of the utility model, the number of fixing holes is 3 to 6, more specifically, the number of fixing holes is three, such as Figure 4 As shown, from left to right, there are the first fixing hole 11, the second fixing hole 12, and the third fixing hole 13. When the first cylinder rod 42 is retracted to the left end, the locking pin 9 is respectively inserted into the first fixing hole 11 and the second fixing hole 12. When the first cylinder rod 42 is extended to the right end, the locking pin 9 is respectively inserted into the second fixing hole 12 and the third fixing hole 13. Similarly, when the number of fixing holes is greater, the counterweight 3 can have a greater degree of variation through the cooperation between the locking pin 9 and the fixing holes, and the distance between the axes of two adjacent fixing holes matches the distance between the axes of two adjacent second cylinder rods 72.

[0031] As a specific implementation, in the counterweight luffing device for a crawler crane of the present utility model, the number of the second ear plate groups 6 is 4 to 8, and more specifically, the number of the second ear plate groups 6 is 4. Of course, the number and distribution mode of the second ear plate groups 6 need to be set according to specific working conditions such as the weight of the counterweight 3 during actual use, and are not limited herein.

[0032] On the other hand, the present utility model also provides a crawler crane, and the crawler crane includes the above-mentioned counterweight luffing device.

[0033] The working principle of the counterweight luffing device for a crawler crane of the present utility model is as follows:

[0034] After the first oil cylinder 4 pushes the chassis 2 to drive the counterweight 3 to move away from the first oil cylinder 4, the second oil cylinder 7 is used to push the locking pin 9 to fix the position. At this time, due to the cylinder rod principle, the amplitude of the counterweight 3 increases. After the first oil cylinder 4 pulls the chassis 2 to drive the counterweight 3 to move towards the first oil cylinder 4, the second oil cylinder 7 is used to push the locking pin 9 to fix the position. At this time, due to the cylinder rod principle, the amplitude of the counterweight 3 decreases, thus realizing the flexible luffing of the counterweight 3.

[0035] To sum up, compared with the prior art, the crawler crane and its counterweight luffing device of the present utility model have the following advantages and beneficial effects:

[0036] This device has a simple structure and is convenient for disassembly and assembly. Through the rolling friction between the pulley 8 and the chute 1, the sliding displacement of the chassis 2 driving the counterweight 3 relative to the turntable 100 is realized. Through the telescopic movement of the first oil cylinder 4, the horizontal position of the counterweight is controlled, and the purpose of controlling the luffing of the counterweight 3 is achieved. Through the telescopic movement of the second oil cylinder 7, the locking and unlocking of the locking pin 9 to the fixing hole are realized. Moreover, during actual use, by setting the position and number of the fixing holes, the change in the amplitude of the counterweight 3 can be accurately realized, and it has good stability and safety. The counterweight adjustment method provided by this device can conveniently and efficiently adjust the position of the counterweight to adapt to different working conditions.

[0037] It should be noted that in this text, unless otherwise clearly specified and defined, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present utility model can be understood according to specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. In addition, in this text, "front", "rear", "left", "right", "up", "down", etc. are all referenced to the placement state shown in the drawings.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A counterweight luffing device for a crawler crane, wherein a slewing platform is provided on the crawler crane, and the counterweight luffing device is arranged on the slewing platform, characterized in that, The counterweight luffing device for a crawler crane includes chutes respectively arranged at two ends of the bottom of the slewing platform, a chassis arranged below the slewing platform, a counterweight arranged in the chassis, and first hydraulic cylinders arranged on both sides of the slewing platform, wherein: A plurality of first ear plate groups and a plurality of second ear plate groups are symmetrically arranged along the center line at the top of the chassis. The first ear plate groups are connected to the slewing platform through the first hydraulic cylinders. The second ear plate groups are slidably connected to the chutes through pulleys hinged thereto. The pulleys are arranged in the chutes. A plurality of fixing holes are formed in the chutes. A second hydraulic cylinder is arranged on one side of the second ear plate groups. The second hydraulic cylinder includes a second cylinder barrel fixed to the inner side of the second ear plate groups, a second cylinder rod slidably connected in the second cylinder barrel. The free end of the second cylinder rod is connected with a locking pin. The outer diameter of the locking pin matches the aperture of the fixing hole. A first through hole matching the second cylinder rod is formed through the second ear plate groups. A second through hole matching the second cylinder rod is formed through the center of the pulley. The apertures of the first through hole and the second through hole both match the aperture of the fixing hole.

2. The counterweight luffing device for a crawler crane according to claim 1, characterized in that, The first ear plate groups each include two corresponding first ear plates. The second ear plate groups each include two corresponding second ear plates. The chutes are arranged between two corresponding second ear plates. The second ear plates are slidably connected to the chutes through the hinged pulleys.

3. The counterweight luffing device for crawler crane according to claim 1, characterized in that, The first hydraulic cylinders include first cylinder barrels hinged to the slewing platform and first cylinder rods hinged to the first ear plate groups. The first cylinder rods are slidably sleeved in the first cylinder barrels.

4. The counterweight luffing device for crawler crane according to claim 3, characterized in that An oil cylinder seat is arranged on the slewing platform. The first cylinder barrels are hinged to the oil cylinder seat.

5. The counterweight luffing device for a crawler crane according to claim 1, wherein The counterweights are arranged at both ends of the chassis. The slewing platform is located between the two counterweights.

6. The counterweight luffing device for a crawler crane according to claim 1, characterized in that The chutes are I-shaped chutes.

7. The counterweight luffing device for a crawler crane according to claim 1, characterized in that, The number of the fixing holes is 3 to 6.

8. The counterweight luffing device for a crawler crane according to claim 1, wherein, The number of the second ear plate groups is 4 to 8.

9. A crawler crane, characterized in that, The crawler crane includes the counterweight luffing device according to any one of claims 1-8.

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