CN102627230A - Crane and balancing weight device thereof - Google Patents

Abstract

The invention discloses a balance weight device of a crane, which includes a balance weight bottom plate and a combined balance weight arranged at both ends of the balance weight bottom plate, and also includes a hydraulic oil cylinder and a rope row device whose bottom end is connected to the balance weight bottom plate; The fixed end of the hydraulic cylinder is fixed to the tail of the turntable of the crane, and the telescopic end of the hydraulic cylinder is connected to the rope row device, so as to lift or lower the balance weight bottom plate through the rope row device. Compared with the prior art, in the lifting process of the balance weight device, the final execution action is completed by the rope, so even if the position of the balance weight deviates during the lifting process, after reaching the designated position, it can be adjusted by adjusting the rope Adjust the position of the balance weight so that the base plate of the balance weight and the turntable can be articulated, and it is easy to meet the positioning requirements of the balance weight of the crane before installation. The invention also discloses a crane comprising the balance weight device.

Description

Cranes and their counterweights

technical field

The invention relates to the technical field of cranes, in particular to a balance weight device of a crane. In addition, the present invention also relates to a crane comprising the above counterweight device.

Background technique

With the rapid development of my country's economic construction, the market demand for large-tonnage cranes is increasing, and cranes are also developing towards super-large tonnage.

Due to the existence of rollover moment when the crane is working, a stabilizing moment is needed to meet the stability of the crane. The rollover moment refers to the sum of the products of all the weights on the hoisting side of the crane and the distances from their respective centers of gravity to the center of slewing; the stabilizing moment refers to the sum of the products of all the weights on the hoisting side of the crane in the opposite direction and the distances from their respective centers of gravity to the center of slewing. The existence of the counterweight is to increase the stabilizing moment and ensure the safety of the crane during operation.

For cranes with small and medium tonnages, a small counterweight can meet the stability requirements of the operation, and it can also be carried on the truck when driving. But for large-tonnage cranes, in order to improve the stable moment of the whole vehicle and give full play to the performance of the main structural parts of the boom, the counterweight is very heavy and cannot be carried when driving, so the counterweight is designed as a combined type.

With the continuous improvement of the lifting performance of the crane, the required stabilizing moment is also increasing, so the weight of the counterweight is continuously increasing, and its suspension position is required to be as far as possible from the center of slewing. If the oil cylinder jacking combination is still used With the balance weight method, when the mounting positions are basically the same, the balance weight of a thousand-ton crane will reach 400 tons, and its height will exceed 6 meters, which will reduce safety and cannot meet the requirements for the balance weight to be installed from the frame.

Please refer to Fig. 1, Fig. 2 and Fig. 3, Fig. 1 is a schematic structural diagram of the self-topping combined counterweight in the prior art; Fig. 2 is a structural schematic diagram of the installation process of the combined counterweight in Fig. 1; Fig. 3 is a schematic diagram of the combined counterweight in Fig. 1 Schematic diagram of the structure after the balance weight is installed.

The self-topping counterweight includes a combined counterweight 101, a counterweight base plate 102, and a hydraulic cylinder 104; both ends of the counterweight base plate 102 are provided with a hydraulic cylinder 104, and the cylinder rod end of the hydraulic cylinder 104 is fixedly connected to the counterweight base plate 102. The cylinder end of the oil cylinder 104 can be embedded inside the combined balance weight 101 to become a part of the balance weight, saving space; when the cylinder rod of the hydraulic cylinder 104 is in the retracted state, the balance weight bottom plate 102 contacts and supports the combined balance weight 101 . The cylinder end of the hydraulic cylinder 104 is provided with a hinge point e that is hinged with the turntable 103 of the crane, and a limit groove 141 is arranged above the hinge point e, and a hinge point and a limit groove are respectively arranged at the corresponding positions of the turntable 103. The limit boss 131 matched with the groove 143, when the cylinder end of the hydraulic cylinder 104 rises to the designated position, the limit groove 141 and the limit boss 131 just match (shown in Fig. 2 ), the hydraulic cylinder The hinge point e at the cylinder end of 104 is aligned with the hinge point on the turntable 103, and the hydraulic oil cylinder 104 and the turntable 103 can be hinged by pin shafts.

When the combination balance weight 101 needs to be installed, the balance weight base plate 102 is placed on the designated position on the upper surface of the vehicle frame with a crane, and the combination balance weight 101 is placed on the balance weight base plate 102 according to actual working conditions; Rotate to the top of the combined balance weight 101; use the remote control device to align the hinge point of the turntable 103 and the hydraulic cylinder 104, connect the oil circuit of the hydraulic cylinder 104, and make the cylinder end of the hydraulic cylinder 104 move upward, thereby driving the combined balance weight 101 upward move. When the hydraulic cylinder 104 was raised to the specified position, the limit groove 141 coincided with the limit boss 131. At this time, the hinge point e of the hydraulic cylinder 104 and the hinge point on the turntable just matched, and the hydraulic cylinder 104 cylinder could be moved with a pin. The cylinder end is hinged with the turntable 103 (shown in Fig. 2); then, by controlling the oil circuit of the hydraulic cylinder 104, the cylinder rod of the hydraulic cylinder 104 is retracted, that is, the balance weight base plate 102 is driven to move upward, when the balance weight base plate 102 rises to When in contact with the combined balance weight 101, the activity of the hydraulic oil cylinder 104 is stopped, the balance valve is locked, and the installation of the balance weight is completed.

If you need to remove the balance weight, just follow the above steps in reverse.

Due to the large tonnage of the crane, there are certain requirements for the weight of the counterweight, which makes the height of the combined counterweight 101 relatively large, so the positioning reliability between the counterweights is required during the installation process; When the oil cylinder 104 lifts the combined balance weight 101, the center of gravity of the combined balance weight 101 is raised by nearly 1 meter, and the stability is poor. The synchronization requirements of the two hydraulic cylinders 104 are extremely high. If the two hydraulic cylinders 104 are not synchronized, it will When the hydraulic cylinder 104 rises to the specified position, it is necessary to hinge the hydraulic cylinder 104 and the turntable 103 so that the weight of the combined balance weight 101 can be hung through a more reliable mechanical connection. It is connected to the turntable 103, so the requirements for precise positioning are very high during the installation process, and the hinge point e at the cylinder end of the hydraulic cylinder 104 cannot be deviated when the cylinder end rises, so that the hydraulic cylinder 104 and the turntable 103 cannot be hinged. In addition, the coupling form of the balance weight base plate 102 and the turntable 103 is a hydraulic coupling, and the hydraulic cylinder 104 is required to maintain a high pressure during the operation of the crane, which may easily cause the seal to fail, and the balance weight base plate 102 will drop, affecting the safety during work. sex.

Therefore, how to develop a counterweight device, which is safe and reliable during installation and disassembly, and can easily meet the requirements of precise positioning of the counterweight before installation, is a technical problem that those skilled in the art need to solve at present.

Contents of the invention

The object of the present invention is to provide a balance weight device of a crane, the installation and disassembly process of the balance weight device is safe and reliable, and the requirement of precise positioning of the balance weight can be easily realized before installation. Another object of the present invention is to provide a crane comprising the above-mentioned counterweight device.

In order to solve the above-mentioned technical problems, the present invention provides a balance weight device of a crane, which includes a balance weight base plate and a combined balance weight arranged at both ends of the balance weight base plate, and also includes a hydraulic cylinder and a bottom end hooked to the balance weight base plate. Rope row device; the fixed end of the hydraulic cylinder is fixed to the tail of the turntable of the crane, and the telescopic end of the hydraulic cylinder is connected to the rope row device, so as to lift or lower the balance weight floor through the rope row device .

Preferably, the hydraulic cylinder is arranged horizontally, and the rope row device includes a movable pulley assembly, a fixed pulley, guide rails and ropes; the fixed end of the hydraulic cylinder is fixed to the side wall of the tail of the turntable, and its telescopic end is connected to the movable pulley The assembly is fixed, the guide rail is fixed on the side wall of the tail of the turntable and supports the movable pulley assembly, the fixed pulley is fixed on the side wall of the tail of the turntable, and the first end to the second end of the rope are wound around Pass through the fixed pulley and the moving pulley assembly, and its first end is detachably connected to the rope hinge point of the counterweight bottom plate, and the second end of the rope is fixed on the side wall of the tail of the turntable.

Preferably, the first end of the rope is further provided with a weight.

Preferably, at least one ear plate is provided on the bottom plate of the balance weight, and a pin shaft oil cylinder pinned to the ear plate is provided at the tail of the turntable.

Preferably, a balance weight pin detection device is also provided on the pin cylinder, so as to detect whether the balance weight bottom plate is pinned to the tail of the turntable.

Preferably, the balance weight pin detection device includes a balance weight pin detection switch arranged on the pin oil cylinder, a first controller connected to the balance weight pin detection switch, and a first controller connected to the first controller. connected to the first display device.

Preferably, the counterweight device further includes an in-position detection device arranged at the rear of the turntable, so as to detect whether the bottom plate of the counterweight is lifted to a specified position.

Preferably, the in-position detection device includes an in-position detection switch disposed at the bottom end of the turntable tail, a second controller connected to the in-position detection switch, and a second display device connected to the second controller.

The present invention also provides a crane, including a turntable and a counterweight device, and the counterweight device is the counterweight device described in any one of the above items.

Preferably, the crane is in particular an all terrain crane.

With respect to the above-mentioned background technology, the balance weight device provided by the present invention includes a balance weight base plate and a combined balance weight arranged at both ends of the balance weight base plate, and also includes a hydraulic cylinder and a rope row device whose bottom end is articulated on the balance weight base plate; the fixing of the hydraulic cylinder The end is fixed to the tail of the turntable of the crane, and the telescopic end of the hydraulic cylinder is connected to the rope row device, so that the balance weight bottom plate can be lifted or lowered by the rope row device. Compared with the prior art, the balance weight device provided by the present invention, in the installation and disassembly process of the balance weight, the final execution action is completed by the rope of the rope row device, so in the lifting process of the balance weight, if If there is a position deviation, after reaching the designated position, the position of the balance weight can be adjusted conveniently by adjusting the rope to complete the connection between the bottom plate of the balance weight and the tail of the turntable, which can easily meet the requirements of precise positioning of the balance weight of the crane before installation.

In a preferred embodiment, the balance weight bottom plate and the tail of the turntable provided by the present invention realize the pin connection between the two through the lug plate arranged on the balance weight bottom plate and the pin shaft oil cylinder arranged at the turntable tail. Further, a balance weight pin detection device is provided on the pin cylinder, so as to detect whether the balance weight bottom plate and the tail of the turntable are in a pinned state, so as to ensure the safety of the crane during operation.

In another preferred embodiment, the balance weight device provided by the present invention also includes an in-position detection device arranged at the tail of the turntable, so as to detect whether the balance weight bottom plate has been lifted to the specified position, so as to prevent the balance weight bottom plate from reaching the specified position. The rope arrangement is overloaded.

Description of drawings

Fig. 1 is the structural schematic diagram of self-topping combined counterweight in the prior art;

Fig. 2 is the structural representation of the installation process of combined counterweight in Fig. 1;

Fig. 3 is a structural schematic diagram after the installation of the combined balance weight in Fig. 1 is completed;

Fig. 4 is a schematic structural view of a specific embodiment of the counterweight device provided by the present invention;

Fig. 5 is a schematic structural view of a specific embodiment of the balance weight bottom plate provided by the present invention;

Fig. 6 is a schematic structural view of the transmission device provided by the present invention before the balance weight is installed;

Fig. 7 is a schematic structural view of the transmission device provided by the present invention during the installation process of the counterweight;

Fig. 8 is a schematic structural diagram of the in-position detection device and the balance weight pin detection device provided by the present invention;

Fig. 9 is a partially enlarged view of part A in Fig. 8 .

Detailed ways

The core of the present invention is to provide a balance weight device of a crane. The installation and disassembly process of the balance weight device is safe and reliable, and the requirement of precise positioning of the balance weight can be easily realized before installation. Another core of the present invention is to provide a crane including the above counterweight device.

It should be noted that the orientation words such as up, down, left, and right involved in this article are defined based on the positions of the components in Figures 4 to 9 and the positions of the components between them, just to describe the technical For the clarity and convenience of the scheme, it should be understood that the use of the location words should not limit the scope of protection claimed in this application.

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to Fig. 4, Fig. 5, Fig. 6 and Fig. 7, Fig. 4 is a structural schematic diagram of a specific embodiment of the counterweight device provided by the present invention; Fig. 5 is a structure of a specific embodiment of the counterweight bottom plate provided by the present invention Schematic diagram; Figure 6 is a schematic structural view of the transmission provided by the present invention before the balance weight is installed; Figure 7 is a structural schematic view of the transmission provided by the present invention during the installation of the counterweight.

In a specific embodiment, the balance weight device provided by the present invention includes a combination balance weight 1 and a balance weight bottom plate 2, and the combination balance weight 1 is evenly arranged on both ends of the balance weight bottom plate 2; it can be adjusted according to actual working conditions Combine the weight of Counterweight 1.

In order to ensure the safety of the installation process of the combined balance weight 1, positioning flanges 11 are provided at both ends of the combined balance weight 1, and a positioning seat 23 matched with the positioning flange 11 is set on the balance weight bottom plate 1; the combined balance weight 1 is placed on After the two ends of the balance weight bottom plate 2, the combined balance weight 1 and the balance weight bottom plate 2 can be fixed by chains bypassing the positioning flange 11 and the positioning seat 23.

The balance weight device also includes two sets of transmission devices 4 installed on the left and right side walls of the turntable 3 tail, for the installation and disassembly of the combined balance weight 1; the transmission device 4 further includes a hydraulic cylinder 41 and a rope row device 42; the hydraulic cylinder 41 is horizontal When set, the rope row device 42 further includes a movable pulley assembly 421 , a fixed pulley 422 and a rope 423 .

The hydraulic cylinder 41 is horizontally arranged on the side wall of the turntable 3 tail, and the fixed end of the hydraulic cylinder 41 can be fixed on the side wall of the turntable 3 tail by a pin, and certainly also can be fixed by other means.

The movable pulley assembly 421 is fixed on the telescopic end of the hydraulic oil cylinder 41; the movable pulley assembly 421 includes a movable pulley, a baffle plate and a guide block; the upper and lower ends between the first baffle plate and the second baffle plate are respectively provided with a movable pulley, and the movable pulley can be moved by a pin shaft. It is hinged with the first baffle and the second baffle; then fix the baffle with the movable pulley and the telescopic end of the hydraulic cylinder 41 at the middle position of the baffle, so that the movable pulley hinged with the baffle is symmetrically distributed on the telescopic end of the hydraulic cylinder 41 The upper and lower sides of the end; the telescopic end of the movable pulley assembly 421 and the hydraulic cylinder 41 can be fixed by a circular shaft, and the two ends of the circular shaft can be connected by flanges or nuts to limit the position of the circular shaft in its axial direction.

On the movable pulley assembly 421, a guide block is fixed on the baffle plate relative to the side wall of the turntable 3 afterbody, and the position and number of the guide block are set according to needs; a guide rail 424 supporting the guide block is installed on the side wall of the turntable 3 tail, so The guide rail 424 supports the guide block, and further supports the movable pulley assembly 421 fixedly installed with the guide block and the telescopic end of the hydraulic cylinder 41 fixedly connected with the movable pulley assembly 421 . The guide rail 424 is arranged horizontally to ensure that under the support of the guide rail 424 , the hydraulic cylinder 41 can drive the moving pulley assembly 421 to reciprocate along the guide rail 424 when the hydraulic cylinder 41 expands and contracts.

The guide rail 424 can be a support rail or a floating rail; the guide rail 424 can be fixed to the side wall at the end of the turntable 2 by welding, which is simple and reliable.

Fixed pulley 422 is fixed on turntable 3 afterbody sidewalls, and both sides of hydraulic oil cylinder 41 are provided with fixed pulleys 422, and fixed pulley 422 and turntable 3 afterbody sidewalls can be fixed by bearing pin.

The first end to the second end of the rope 423 are wound around the fixed pulley 422 and the movable pulley of the movable pulley assembly 421 in sequence, and the first end of the rope 423 is detachably connected to the rope hinge point 22 of the balance weight base plate 2, and can be connected between the rope 423. The first end is provided with a hooking device 425 to facilitate the hooking of the rope 423 and the counterweight bottom plate 2; the second end of the rope 423 is fixed to the fixed hinge point J on the rear side wall of the turntable 3 .

The specific forms of the fixed hinge point J can be various; the fixed hinge point J can be specifically in the following form: a through hole is set at a corresponding position on one side of two vertically placed support plates, and the connecting shaft passes through the joint of the two support plates. The through hole fixes the support plate on the turntable 3, and the end of the connecting shaft is connected and limited by a nut; grooves are arranged on the opposite two sides of the two support plates, and the third support plate is placed horizontally and connected with the two through the groove. The first support plate is clamped, and a through hole is set on the third support plate for fixing the rope 423.

Another group of transmission devices 4 is arranged in the same manner as above on the other side wall of the turntable 3 tail, so that there are four groups of ropes at the turntable 3 tail, and the first end of each group of ropes is provided with a hitch, a total of four The hooking device is used to connect with the four rope hinge points 22 on the balance weight base plate 2 . Of course, in actual situations, the number of rope groups and the corresponding movable pulley assemblies and fixed pulleys can be set as required.

Wherein the winding direction of the rope 423 and the position setting of the fixed pulley 422 can refer to FIG. 6 . As shown in Figure 2, the second end of rope 423 is fixed on the fixed hinge point J of turntable 3 afterbody side walls, and rope 423 walks around the movable pulley of movable pulley assembly 421, fixed pulley 422, until the first end of rope 423 successively, can It is understood that when the expansion and contraction of the hydraulic cylinder 41 is L, the movement of the rope 423 will be 2L, that is, the movement of the balance weight base plate 2 in the vertical direction is also 2L, and the hydraulic cylinder 41 can make the balance with a small expansion and contraction. Heavy bottom plate 2 promotes larger displacement.

It should be noted here that, in order to ensure that the ropes 423 can withstand sufficient strength, each group of ropes can use multiple ropes, which can be set according to needs.

Please refer to Fig. 6 and Fig. 7, when the telescoping end of the hydraulic cylinder 41 protrudes to the left along the rear side wall of the turntable 3, it will drive the moving pulley assembly 421 to move horizontally to the left along the guide rail 424, thereby pulling the rope 423 horizontally to the left, through The fixed pulley 422 realizes the upward traction of the rope 423, thereby driving the balance weight bottom plate 2 connected with the hitch 425 of the rope 423 to move upward, and then driving the combined balance weight 1 arranged at both ends of the balance weight bottom plate 2 to move upward.

When it is necessary to install the balance weight, first hoist the balance weight base plate 2 at a predetermined position with a crane, place it horizontally on the ground, and place the combined balance weight 1 on both ends of the balance weight base plate 2 according to actual working conditions; Turn the tail of the turntable 3 to directly above the balance weight base plate 2; fully retract the telescopic end of the hydraulic cylinder 41, put down the rope 423, and hook the rope 423 to the balance weight base plate 2 through the hitch device 425; Make the telescopic end of the hydraulic cylinder 41 stretch out, and the movable pulley assembly 421 connected with the telescopic end pulls the rope 423 horizontally to the left along the guide rail 424 under the drive of the telescopic end, and then pulls the rope 423 upward through the fixed pulley 422, and then drives and articulates The balance weight base plate 2 connected to the device 425 and the combined balance weight 1 arranged thereon move upwards, and when the combined balance weight 1 rises to the specified position, the operation of the hydraulic cylinder 41 is stopped; The plate 21 is fixed to the locking hinge point (not shown in the figure) on the turntable 3 to complete the installation of the balance weight.

In a preferred solution, a pin shaft cylinder 6 can be arranged at the tail of the turntable 3 , and the pin connection between the balance weight bottom plate 2 and the tail of the turntable 3 can be realized by controlling the pin shaft oil cylinder 6 .

Since during the installation process of the balance weight, the final execution action is completed by the rope 423, so even if there is a position deviation of the balance weight bottom plate 2 during the lifting process, after reaching the designated position, it can be easily adjusted by adjusting the rope 423 The position of the balance weight base plate 2 enables the balance weight base plate 2 and the turntable 3 to be articulated, which can easily meet the precise positioning requirements of the crane balance weight before installation; after the balance weight is installed, combine the balance weight 1 and the balance weight base plate 2 All the weight of the crane is borne by the mechanical connection between the counterweight base plate 2 and the turntable 3, which improves the safety and reliability of the crane during operation.

In addition, due to the horizontal setting of the hydraulic cylinder 41 and the setting of the rope row device 42, when the expansion and contraction of the hydraulic cylinder 41 is L, the lift height of the counterweight base plate 2 is 2L; the horizontal setting of the hydraulic cylinder 41 is not limited by space, and can be The expansion and contraction of the hydraulic cylinder 41 is set to an appropriate value so that the balance weight bottom plate 2 can be placed on the ground to realize the hooking with the rope row device 42, and it does not need to be limited to the frame, which overcomes the problem that the balance weight is bulky and difficult to arrange; At the same time, the length of the turntable 3 is not affected by the placement position of the balance weight base plate 2 before installation, and the distance between the tail of the turntable 3 and the center of rotation can be appropriately enlarged, so that the total weight of the structure after the final installation is completed can be reduced.

What needs to be explained here is that when installing the balance weight, it is necessary to put down the rope 423. During the falling process of the rope 423, since the weight of the rope 423 itself is relatively light, in order to facilitate the falling of the rope 423, a weight can be set on the hitch 425. piece.

Referring to Fig. 6, since the rope 423 on the left side and its hooking device 425 are located at the bottom of the tail of the turntable 3, in the process of pulling the combined balance weight 1 up, in order to prevent the left weight 426-1 from colliding with the bottom of the turntable 3, The weight 426-1 on the left side can be set as a vertical plate form; with reference to Fig. 5, the rope hinge point 221 on the rear side of the balance weight base plate 2 matched with the left hitch 425-1 cooperates with the vertical plate, The vertical plate as a weight can be placed on the bottom of the balance weight base plate 2 through the rope hinge point 221 on the rear side, so as to avoid collision with the bottom of the turntable 3 . Of course, the weight 426-2 on the right and the weight 426-1 on the left can also be set to the same structure.

Please refer to Fig. 8 and Fig. 9, Fig. 8 is a schematic structural diagram of the in-position detection device and the balance weight pin detection device provided by the present invention; Fig. 9 is a partial enlarged view of part A in Fig. 8 .

In the actual working process, the balance weight base plate 2 and the tail of the turntable 3 are pinned through the pin shaft oil cylinder 6, so that the weight of the balance weight base plate 2 and the combined balance weight 1 are all borne by reliable mechanical connections during the working process, which improves the working process. safety and reliability. In order to accurately judge whether the balance weight base plate 2 and the tail of the turntable 3 are pinned, a balance weight pin detection device can be further arranged on the pin cylinder 6 at the turntable 3 tail; the balance weight pin detection device includes a balance weight pin detection switch 7, A first controller connected with the balance weight pin detection switch 7 and a first display device connected with the first controller.

When the balance weight bottom plate 2 and the turntable 3 are in the pinned state, the balance weight pin detection switch 7 is in the on or off state, and a detection signal is sent out. After the first controller receives the signal, it analyzes and processes it. The connected first display device issues an instruction, and the operator can judge the status of the balance weight bottom plate 2 and the turntable 3 according to the signal of the first display device, and carry out the next step of operation.

During the installation process of the balance weight, in order to accurately judge the lifting position of the balance weight bottom plate 2 and avoid overloading the rope row device 42 after the balance weight bottom plate 2 is in place, the balance weight device provided by the present invention is further provided with an in-position detection device. The in-position detection device includes an in-position detection switch 5 installed at the bottom end of the turntable 3 tail, a second controller connected with the in-position detection switch 5 and a second display device connected with the second controller. The second controller can receive the detection signal collected by the position detection switch 5, and through reading and analyzing the detection signal, issue a corresponding command and transmit it to the second display device.

When the balance weight bottom plate 2 is lifted to the specified position, it is within the detection range of the in-position detection switch 5, and the in-position detection switch 5 is in the state of on or off, and sends out a detection signal. After receiving the signal, the second controller analyzes the Processing, send an instruction to the second display device connected to it, the operator can judge that the balance weight has reached the specified height according to the signal of the second display device, and stop the operation of the hydraulic cylinder 41 .

In addition to the above-mentioned counterweight device, the present invention also provides a crane including the above-mentioned counterweight device. For the structure of other parts of the crane, please refer to the prior art, which will not be repeated here.

Specifically, the above-mentioned crane may be an all-terrain crane.

The crane and its counterweight device provided by the present invention have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (10)

1. A counterweight device of a crane, comprising a counterweight base plate and a combined counterweight arranged at the two ends of the counterweight base plate, characterized in that, it also includes a hydraulic cylinder and a bottom end hooked to the rope arrangement of the counterweight base plate The fixed end of the hydraulic cylinder is fixed to the tail of the turntable of the crane, and the telescopic end of the hydraulic cylinder is connected to the rope row device, so as to lift or lower the balance weight floor through the rope row device. 2. the counterweight device of crane as claimed in claim 1, is characterized in that, described hydraulic oil cylinder is horizontally arranged, and described rope arrangement comprises movable pulley assembly, fixed pulley, guide rail and rope; The fixed end of described hydraulic oil cylinder is connected with The side wall of the tail of the turntable is fixed and its telescopic end is fixed to the movable pulley assembly, the guide rail is fixed to the side wall of the tail of the turntable and supports the movable pulley assembly, and the fixed pulley is fixed to the side of the tail of the turntable On the wall, the first end to the second end of the rope go around the fixed pulley and the movable pulley assembly in turn, and the first end of the rope is detachably connected to the rope hinge point of the counterweight bottom plate, and the rope The second end is fixed on the side wall of the tail of the turntable. 3. The balance weight device of a crane according to claim 2, wherein a weight is further provided at the first end of the rope. 4. The counterweight device of a crane as claimed in any one of claims 1 to 3, wherein at least one ear plate is arranged on the bottom plate of the balance weight, and the rear part of the turntable is provided with a pin connected to the ear plate. pin cylinder. 5. The counterweight device of a crane as claimed in claim 4, wherein a counterweight pin detection device is also provided on the pin oil cylinder, so as to detect whether the counterweight bottom plate is pinned to the tail of the turntable . 6. The counterweight device of a crane as claimed in claim 5, wherein said counterweight pin detection device comprises a counterweight pin detection switch arranged on said pin oil cylinder, and said counterweight pin A first controller connected to the axis detection switch and a first display device connected to the first controller. 7. The counterweight device of a crane as claimed in any one of claims 1 to 3, wherein the counterweight device further comprises an in-position detection device arranged at the tail of the turntable, so as to detect whether the counterweight base plate Raise to the specified location. 8. The counterweight device of a crane as claimed in claim 7, wherein the in-position detection device comprises an in-position detection switch arranged at the bottom end of the tail of the turntable, a second controller connected to the in-position detection switch, and A second display device connected to the second controller. 9. A crane, comprising a turntable and a counterweight device pinned to the turntable, characterized in that the counterweight device is the counterweight device according to any one of claims 1 to 8. 10. The crane according to claim 9, characterized in that the crane is in particular an all terrain crane.

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