Crawler crane and counterweight self-loading and unloading device thereof

Abstract

The utility model discloses a crawler crane and a counterweight self-loading / unloading device thereof, and the counterweight self-loading / unloading device comprises a first pulley block arranged at the top of a bottom section, a support frame hinged to the top of a vehicle body, a second pulley block arranged at the free end of the support frame, and a third pulley block arranged at one end, far away from the bottom section, of the vehicle body, a variable-amplitude steel wire rope is connected between the first pulley block and the second pulley block, a variable-amplitude steel wire rope is connected between the second pulley block and the variable-amplitude winding drum, an inhaul cable is connected between the free end of the supporting frame and the balancing weight, and the inhaul cable abuts against a third sliding groove formed in the periphery of the third pulley block; according to the device, an oil cylinder device is replaced by the flexible variable-amplitude steel wire rope, the self-loading and unloading process of the balancing weight is completed through a fixed pulley block formed by the inhaul cables and the third pulley block by utilizing an original variable pair structure and a propeller strut combined structure of equipment, the balancing weight is hoisted through the two identical inhaul cables in the actual use process, the structure stress is balanced in the loading and unloading process, and the loading and unloading efficiency is improved. The synchronism is good, and the system operation is more stable.

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 self-loading and unloading device thereof. Background Technique

[0002] A crawler crane is a self-propelled crane used for high-rise building construction. It is a luffing jib crane 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 hoisting operations at construction sites and can perform various operations such as earth excavation, soil ramming, and pile driving. The crawler crane is composed 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. The top is provided with two sets of boom pulley blocks. The luffing wire rope is connected to the winch inside the fuselage through the boom pulley block at the top of the boom. The boom can be made in sections and extended.

[0003] The self-loading and unloading device of a crawler crane is an automated solution to improve the installation and disassembly efficiency of the equipment. The current counterweight self-loading and unloading device of a crawler crane usually completes the loading and unloading of the counterweight by the combined action of 2 sets of hydraulic cylinders. Since the counterweight is heavy and needs to be lifted to a certain height, large hydraulic cylinders with a larger cylinder diameter, thicker rod diameter, and longer stroke need to be selected for the hydraulic cylinders. Also, since 2 sets of hydraulic cylinders need to act together, their synchronization requirements are relatively high. Otherwise, there will be adverse states such as uneven weight, crawling, and jitter, resulting in affecting the service life of the hydraulic cylinders, and there are certain safety hazards during the process of loading and unloading the counterweight. To sum up, there is an urgent need for a crawler crane and a counterweight self-loading and unloading device thereof. Summary of the Utility Model

[0004] To solve some or all of the above technical problems existing in the prior art, on the one hand, the utility model provides a counterweight self-loading and unloading device for a crawler crane. The counterweight self-loading and unloading device is arranged on the vehicle body. A traveling mechanism is arranged at the bottom of the vehicle body. A bottom section is arranged on one side of the vehicle body, and a counterweight block is arranged on the other side. A luffing winch is arranged between the bottom section and the counterweight block. A fixed rod is connected between the bottom section and the traveling mechanism. The counterweight self-loading and unloading device includes a first pulley block arranged at the top of the bottom section, a support frame hinged to the top of the vehicle body, a second pulley block arranged at the free end of the support frame, and a third pulley block arranged at one end of the vehicle body away from the bottom section. A luffing wire rope is connected between the first pulley block and the second pulley block. The luffing wire rope is connected between the second pulley block and the luffing winch. A cable is connected between the free end of the support frame and the counterweight block. The cable abuts against a third chute arranged on the outer periphery of the third pulley block.

[0005] Further, in the above counterweight self-loading and unloading device for a crawler crane, a first support is provided at the top of the bottom section, the first pulley block is hinged to the first support, a second support is provided at the top of the support frame, the second pulley block is hinged to the second support, a third support is provided at one end of the vehicle body away from the bottom section, the third pulley block is hinged to the third support, a fourth support is provided at the top end of the middle of the vehicle body, and one end of the support frame away from the second support is hinged to the fourth support.

[0006] Further, in the above counterweight self-loading and unloading device for a crawler crane, a lifting hole is provided on the second support, the cable is fixed to the lifting hole, and the luffing wire rope passes through the first pulley block and is then fixed to the second support.

[0007] Further, in the above counterweight self-loading and unloading device for a crawler crane, the luffing drum is arranged between the third support and the fourth support.

[0008] As a specific embodiment, in the above counterweight self-loading and unloading device for a crawler crane, the luffing wire rope extends out from the luffing drum, sequentially abuts against the second sliding groove provided on the outer periphery of the second pulley block, then extends out from the second pulley block and passes through the first sliding groove provided on the outer periphery of the first pulley block, and then passes through and is fixed to the free end of the support frame.

[0009] As a specific embodiment, in the above counterweight self-loading and unloading device for a crawler crane, one end of the cable away from the support frame is connected to the bottom row provided at the bottom of the counterweight block.

[0010] As a specific embodiment, in the above counterweight self-loading and unloading device for a crawler crane, a triangular structure is formed among the traveling mechanism, the bottom section, and the fixed rod.

[0011] On the other hand, the present invention also provides a crawler crane, and the crawler crane includes the above counterweight self-loading and unloading device.

[0012] The crawler crane and its counterweight self-loading and unloading device of the present invention have the following advantages and beneficial effects:

[0013] This device has a simple structure and is convenient for disassembly and assembly. By replacing the oil cylinder device with a flexible luffing wire rope, and using the original luffing structure of the equipment combined with the A-frame structure, the self-loading and unloading process of the counterweight block is completed through the fixed pulley block formed by the cable and the third pulley block. During actual use, the counterweight block is hoisted by 2 identical cables, and the structure is evenly stressed and has good synchronism during loading and unloading. Moreover, the triangular structure formed among the traveling mechanism, the bottom section, and the fixed rod makes the system operate more smoothly. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0015] Figure 1 is a schematic structural diagram of the crawler crane and its counterweight self-loading and unloading device of the present invention;

[0016] Figure 2 is a schematic diagram of the completed state of the installation of the counterweight block for the crawler crane and its counterweight self-loading and unloading device of the present invention.

[0017] Explanation of reference numerals:

[0018] 1 - First pulley group, 2 - Second pulley group, 3 - Third pulley group, 4 - Support frame, 5 - Luffing wire rope, 6 - Cable, 100 - Vehicle body, 101 - Luffing drum, 200 - Traveling mechanism, 300 - Bottom section, 400 - Counterweight block, 500 - Fixed rod. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention in combination with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0020] Such as Figure 1 and Figure 2As shown in the figure, on the one hand, the utility model discloses a counterweight self-loading and unloading device for a crawler crane. The counterweight self-loading and unloading device is arranged on the vehicle body 100. A traveling mechanism 200 is arranged at the bottom of the vehicle body 100. A bottom section 300 is fixedly arranged on one side of the vehicle body 100, and a counterweight 400 is arranged on the other side. The counterweight 400 is arranged at one end of the vehicle body 100. A luffing drum 101 is arranged between the bottom section 300 and the counterweight 400. The luffing drum 101 is arranged inside the vehicle body 100. A fixing rod 500 is connected between the bottom section 300 and the traveling mechanism 200. The counterweight self-loading and unloading device includes a first pulley block 1 arranged at the top of the bottom section 300, a support frame 4 hinged to the top of the vehicle body 100, a second pulley block 2 arranged at the free end of the support frame 4, and a third pulley block 3 arranged at one end of the vehicle body 100 away from the bottom section 300. The first pulley block 1, the second pulley block 2, and the third pulley block 3 all act as fixed pulleys. A luffing steel wire rope 5 is connected between the first pulley block 1 and the second pulley block 2. A luffing steel wire rope 5 is connected between the second pulley block 2 and the luffing drum 101. A cable 6 is connected between the free end of the support frame 4 and the counterweight 400. The cable 6 abuts against a third chute (not shown in the figure) arranged on the outer periphery of the third pulley block 3. During the self-loading and unloading process of the crane, the cable 6 can be made to pull obliquely upward through the third pulley block 3 and converted into a vertically upward traction force on the counterweight 400.

[0021] Further, in the counterweight self-loading and unloading device for a crawler crane of the present utility model, a first support is arranged at the top of the bottom section 300. The first pulley block 1 is hinged to the first support. A second support is arranged at the top of the support frame 4. The second pulley block 2 is hinged to the second support. A third support is arranged at one end of the vehicle body 100 away from the bottom section 300. The third pulley block 3 is hinged to the third support. A fourth support is arranged at the top end of the middle part of the vehicle body 100. One end of the support frame 4 away from the second support is hinged to the fourth support.

[0022] Further, in the counterweight self-loading and unloading device for a crawler crane of the present utility model, a lifting hole is opened on the second support. The cable 6 is fixed to the lifting hole. The luffing steel wire rope 5 passes through the first pulley block 1 and is fixed to the second support.

[0023] Further, in the counterweight self-loading and unloading device for a crawler crane of the present utility model, the luffing drum 101 is arranged between the third support and the fourth support.

[0024] As a specific embodiment, in the counterweight self-loading and unloading device for a crawler crane of the present utility model, the luffing wire rope 5 extends out from the luffing winch drum 101, successively abuts against a second chute (not shown in the figure) provided on the outer periphery of the second pulley set 2, then extends out from the second pulley set 2 and passes through a first chute (not shown in the figure) provided on the outer periphery of the first pulley set 1, and then passes through and is fixed to the free end of the support frame 4. With such a setting, when the luffing wire rope 5 contracts into the luffing winch drum 101, the second support can displace obliquely upward. Of course, the connection relationship between the luffing wire rope 5 and the first pulley set 1, the second pulley set 2, and the third pulley set 3 can also be set according to the actual use conditions, as long as the above functions are satisfied.

[0025] As a specific embodiment, in the counterweight self-loading and unloading device for a crawler crane of the present utility model, one end of the cable 6 far from the support frame 4 is connected to a bottom row (not shown in the figure) provided at the bottom of the counterweight block 400. With such a setting, the hoisting of the counterweight block 400 by the cable 6 is made more stable.

[0026] As a specific embodiment, in the counterweight self-loading and unloading device for a crawler crane of the present utility model, a triangular structure is formed among the traveling mechanism 200, the bottom section 300, and the fixing rod 500. With such a setting, the force borne on the bottom section 300 is dispersed, making the crane more stable during the counterweight self-loading and unloading process, and improving the overall safety and stability of the device.

[0027] On the other hand, the present utility model also provides a crawler crane, and the crawler crane includes the above-mentioned counterweight self-loading and unloading device.

[0028] The working principle of the counterweight self-loading and unloading device for a crawler crane of the present utility model is as follows:

[0029] When the luffing winch drum 101 rotates in the positive direction, the luffing wire rope 5 contracts into the luffing winch drum 101. During this process, the luffing wire rope 5 in the second pulley set 2 slides clockwise along the second chute, the luffing wire rope 5 between the second pulley set 2 and the first pulley set 1 moves towards the second pulley set 2, and the luffing wire rope 5 between the first pulley set 1 and the second support moves towards the first pulley set 1. At this time, the luffing wire rope 5 drives the support frame 4 to displace upward by pulling the second support, the support frame 4 drives the cable 6 to displace upward, and the cable 6 hoists the counterweight block 400 upward to one side of the vehicle body 100 to complete the installation. This process is the installation process of the counterweight block 400;

[0030] When the counterweight 400 needs to be disassembled, the luffing drum 101 rotates in the reverse direction, and the luffing wire rope 5 extends out of the luffing drum 101. Due to the gravity of the counterweight 400, the counterweight 400 moves downward under the action of gravity, driving the support frame 4 downward through the cable 6. During this process, the luffing wire rope 5 in the second pulley block 2 slides counterclockwise along the second chute. The luffing wire rope 5 between the second pulley block 2 and the first pulley block 1 moves towards the first pulley block 1, and the luffing wire rope 5 between the first pulley block 1 and the second support moves towards the second support, so as to support the downward displacement of the support frame 4 until the cable 6 hoists the counterweight 400 downward to the ground to complete the disassembly. This process is the disassembly process of the counterweight 400.

[0031] In summary, compared with the prior art, the crawler crane and its counterweight self-loading and unloading device of the present utility model have the following advantages and beneficial effects:

[0032] The device has a simple structure and is convenient for disassembly and assembly. The flexible luffing wire rope 5 is used to replace the oil cylinder device. By using the original luffing structure of the equipment and the structure combined with the derrick, the self-loading and unloading process of the counterweight 400 is completed through the fixed pulley block formed by the cable 6 and the third pulley block 3. During actual use, the counterweight 400 is hoisted by 2 identical cables 6. When loading and unloading, the structure is evenly stressed and has good synchronism. Moreover, the triangular structure formed by the traveling mechanism 200, the bottom section 300, and the fixed rod 500 makes the system operate more smoothly.

[0033] It should be noted that in this article, 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 internal connection of two components or the interaction relationship between two components. 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 situations. 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 also includes elements inherent to such process, method, article or device. In addition, in this article, "front", "rear", "left", "right", "up", "down", etc. are all referenced to the placement state shown in the drawings.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the 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 invention.

Claims

1. A counterweight self-loading and unloading device for a crawler crane, the counterweight self-loading and unloading device is arranged on a vehicle body, a traveling mechanism is arranged at the bottom of the vehicle body, a bottom section is arranged on one side of the vehicle body, a counterweight block is arranged on the other side, a luffing winch is arranged between the bottom section and the counterweight block, and a fixing rod is connected between the bottom section and the traveling mechanism, characterized in that, The counterweight self-loading and unloading device includes a first pulley set arranged at the top of the bottom section, a support frame hinged to the top of the vehicle body, a second pulley set arranged at the free end of the support frame, and a third pulley set arranged at one end of the vehicle body away from the bottom section. A luffing wire rope is connected between the first pulley set and the second pulley set, the luffing wire rope is connected between the second pulley set and the luffing drum, a cable is connected between the free end of the support frame and the counterweight block, and the cable abuts against a third chute arranged on the outer periphery of the third pulley set.

2. The counterweight self-loading and unloading device for a crawler crane according to claim 1, characterized in that, A first support is arranged at the top of the bottom section, the first pulley set is hinged to the first support, a second support is arranged at the top of the support frame, the second pulley set is hinged to the second support, a third support is arranged at one end of the vehicle body away from the bottom section, the third pulley set is hinged to the third support, a fourth support is arranged at the top end of the middle part of the vehicle body, and one end of the support frame away from the second support is hinged to the fourth support.

3. The counterweight self-loading and unloading device for crawler crane according to claim 2, characterized in that, A lifting hole is formed in the second support, the cable is fixed to the lifting hole, and the luffing wire rope passes through the first pulley set and is fixed to the second support.

4. The counterweight self-loading and unloading device for crawler crane according to claim 2, characterized in that The luffing drum is arranged between the third support and the fourth support.

5. The self-loading and unloading device for counterweight of a crawler crane according to claim 1, wherein The luffing wire rope extends out of the luffing drum, abuts against a second chute arranged on the outer periphery of the second pulley set in sequence, then extends out of the second pulley set, passes through a first chute arranged on the outer periphery of the first pulley set, and then passes through and is fixed to the free end of the support frame.

6. The counterweight self-loading and unloading device for a crawler crane according to claim 1, characterized in that, One end of the cable away from the support frame is connected to a bottom row arranged at the bottom of the counterweight block.

7. The self-loading and unloading device for counterweight of crawler crane according to claim 1, characterized in that, A triangular structure is formed among the traveling mechanism, the bottom section, and the fixed rod.

8. A crawler crane, characterized in that, The crawler crane includes the counterweight self-loading and unloading device according to any one of claims 1-7.

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