Counterweight system and engineering machine

Abstract

The present disclosure relates to a counterweight system and a construction machine, wherein the counterweight system comprises a base (1), a transmission device (2), a counterweight (3) and a driving device (4), the transmission device (2) is movably mounted on the base (1), the counterweight (3) is connected with the transmission device (2), the driving device (4) is mounted on the base (1), the driving device (4) is drivingly connected with the transmission device (2), the driving device (4) is configured to drive the transmission device (2) to move relative to the base (1), the transmission device (2) drives the counterweight (3) to move relative to the base (1) to change the center of gravity of the base (1). The construction machine comprises the counterweight system. The present disclosure can adjust the position of the counterweight in real time according to the demand, without frequent disassembly and assembly of the counterweight, which is beneficial to simplify the adjustment process and improve the adjustment efficiency.

Description

Technical Field

[0001] This disclosure relates to the field of engineering machinery technology, and in particular to a counterweight system and engineering machinery. Background Technology

[0002] Cranes are common mechanical devices primarily used for vertical transport of heavy objects. They are widely used in large-scale construction projects such as wind farms, petrochemical engineering, and bridges, and also play a vital role in urban, road, and factory construction. With technological advancements, more and more cranes are being equipped with variable-position counterweight technology to adapt to the demands of operating in more confined spaces.

[0003] To make crane operations more flexible, more users want to adjust the counterweight position in real time during crane operations, making it suitable for more complex working spaces.

[0004] Currently, the most widely used method for repositioning pull-type counterweights is the dual-suspension-point pre-positioning technology. This method requires the counterweight to be placed in the corresponding position before installation, and the counterweight position cannot be adjusted in real time after installation. Figure 1 As shown, the scheme includes a turntable a1, a lifting cylinder a2, and a counterweight a3. The lifting cylinder a2 is fixed at attachment point a4 or a5 on the rear frame of the turntable a1, allowing the counterweight to be installed at different locations from the rotation center. After the counterweight is installed, if its position needs to be changed, the counterweight must be removed, relocated, and reinstalled.

[0005] The disadvantages of the above scheme include: 1. Existing counterweight repositioning methods require counterweights to be installed at multiple locations on the frame, which is a cumbersome process.

[0006] 2. The existing counterweight cannot be moved after installation. If relocation is required, the counterweight must be disassembled, placed in the target location, and then reinstalled. This process is complex, inefficient, and inconvenient to use. Summary of the Invention

[0007] This disclosure provides a counterweight system and engineering machinery that can effectively simplify the adjustment process and improve adjustment efficiency.

[0008] According to a first aspect of this disclosure, a counterweight system is provided, comprising: Base; The transmission device is movably mounted on the base; The counterweight is connected to the transmission device; and The drive unit is mounted on the base and is connected to the transmission unit. The drive unit is configured to drive the transmission unit to move relative to the base. The transmission unit drives the counterweight to move relative to the base, thereby changing the center of gravity of the base.

[0009] In some embodiments, the counterweight system further includes a movable member, a transmission device rotatably mounted on a base, the movable member being connected to the transmission device and movably mounted on the counterweight, so that when the transmission device rotates relative to the base, it drives the movable member and the counterweight to move relative to the base along a first direction, while the movable member moves relative to the counterweight along a second direction, with a first preset angle between the first direction and the second direction.

[0010] In some embodiments, there are two transmission devices and two movable parts. Each transmission device is connected to a corresponding movable part. When the two transmission devices rotate relative to the base, they respectively drive the two movable parts to move closer to each other or further away from each other.

[0011] In some embodiments, the counterweight includes a counterweight body and a connecting beam. The side of the connecting beam is provided with a slide rail, and the movable part is provided with a slide groove, into which the slide rail is inserted.

[0012] In some embodiments, the counterweight includes a connecting column connected between the counterweight body and the connecting beam, the connecting column having a preset height to allow weight-adding blocks to be inserted between the counterweight body and the connecting beam to increase the weight of the counterweight.

[0013] In some embodiments, the transmission device includes an adapter and a connector. The adapter is rotatably mounted on a base. The adapter connects the drive device and the connector. The connector has a plug-in portion, and the movable member has a plug-in interface. The plug-in portion is inserted into the plug-in interface to achieve a plug-in connection between the connector and the movable member.

[0014] In some embodiments, the adapter includes a first adapter portion and a second adapter portion. The first adapter portion is driven to be connected to a driving device, and the second adapter portion is connected to a connector. The first adapter portion and the second adapter portion are integrated and rotatably connected to a base, and a second preset angle is formed between the first adapter portion and the second adapter portion.

[0015] In some embodiments, the base has a receiving cavity, the driving device is disposed inside the receiving cavity, the transmission device is disposed outside the receiving cavity, the receiving cavity has a through hole, and the driving device passes through the through hole to connect with the transmission device.

[0016] In some embodiments, the counterweight system further includes a frame and a positioning block, with the base rotatably mounted on the frame and the bottom of the counterweight having a positioning groove, into which the positioning block can be embedded to position the counterweight at its initial position.

[0017] According to a second aspect of this disclosure, an engineering machine is provided, including the aforementioned counterweight system.

[0018] Based on the above technical solution, the embodiments of this disclosure, by setting up a transmission device and a drive device, can use the drive device to drive the transmission device to move relative to the base, and then use the transmission device to drive the counterweight to move relative to the base, thereby realizing the stepless movement of the counterweight relative to the base. This allows the position of the counterweight relative to the base to be adjusted in real time according to the actual load-bearing capacity of the base. When adjusting the position of the counterweight relative to the base, it is not necessary to repeatedly disassemble and assemble the counterweight, thereby greatly simplifying the adjustment process, improving adjustment efficiency, and enhancing ease of use. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings: Figure 1 This is a schematic diagram of the displacement structure of the counterweight in related technologies.

[0020] Figure 2 The diagram shows the structure of some embodiments of the counterweight system provided in this disclosure.

[0021] Figure 3 This is a partial structural schematic diagram of some embodiments of the counterweight system provided in this disclosure.

[0022] Figure 4 This is a schematic diagram showing the connection between the counterweight and the movable component in some embodiments of the counterweight system provided in this disclosure.

[0023] Figure 5 This is a schematic diagram of the structure of the counterweight in the first position in some embodiments of the counterweight system provided in this disclosure.

[0024] Figure 6 This is a schematic diagram of the structure of the counterweight in a second position in some embodiments of the counterweight system provided in this disclosure.

[0025] Figure 7 A schematic diagram of the connecting beam in some embodiments of the counterweight system provided in this disclosure.

[0026] Figure 8 This is a schematic diagram of the movable component in some embodiments of the counterweight system provided in this disclosure.

[0027] Figure 9 This is a schematic diagram showing the connection between the drive device and the transmission device in some embodiments of the counterweight system provided in this disclosure.

[0028] Figure 10 This is a schematic diagram of the positioning groove in some embodiments of the counterweight system provided in this disclosure.

[0029] Figure 11This is a schematic diagram of the positioning block in some embodiments of the counterweight system provided in this disclosure.

[0030] Figure 12 The diagram shows the structure of the counterweight body and connecting column in some embodiments of the counterweight system provided in this disclosure.

[0031] Figure 13 This is a schematic diagram of the bottom structure of the connecting beam in some embodiments of the counterweight system provided in this disclosure.

[0032] Figure 14 This is a schematic diagram showing the connection between the counterweight body and the connecting beam in some embodiments of the counterweight system provided in this disclosure.

[0033] In the picture: 1. Base; 11. Receiving cavity; 12. Through hole; 2. Transmission device; 21. Adapter; 211. First adapter; 212. Second adapter; 22. Connector; 3. Counterweight; 31. Counterweight body; 32. Connecting beam; 321. Slide rail; 322. First connecting hole; 33. Connecting column; 331. Second connecting hole; 34. Positioning groove; 4. Drive device; 5. Movable part; 51. Slide groove; 52. Insertion interface; 6. Frame; 7. Positioning block. Detailed Implementation

[0034] The technical solutions in the embodiments of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0035] In the description of this disclosure, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure.

[0036] like Figure 2 and Figure 3As shown, in some embodiments of the counterweight system provided in this disclosure, the counterweight system includes a base 1, a transmission device 2, a counterweight 3, and a drive device 4. The transmission device 2 is movably mounted on the base 1, the counterweight 3 is connected to the transmission device 2, the drive device 4 is mounted on the base 1, and the drive device 4 is drivenly connected to the transmission device 2. The drive device 4 is configured to drive the transmission device 2 to move relative to the base 1, and the transmission device 2 drives the counterweight 3 to move relative to the base 1, so as to change the center of gravity position of the base 1.

[0037] By setting up a transmission device 2 and a drive device 4, and connecting the drive device 4 to the transmission device 2, and connecting the transmission device 2 to the counterweight 3, the drive device 4 can drive the transmission device 2 to move relative to the base 1. This, in turn, drives the counterweight 3 to move relative to the base 1, achieving stepless movement of the counterweight 3 relative to the base 1. The position of the counterweight 3 relative to the base 1 can be adjusted in real time according to the actual load-bearing capacity of the base 1, thereby changing the center of gravity of the base 1, preventing it from tipping over, and improving its load-bearing stability and safety. Furthermore, adjusting the position of the counterweight 3 relative to the base 1 does not require repeated disassembly and reassembly, greatly simplifying the adjustment process, improving efficiency, and enhancing ease of use.

[0038] like Figure 4 In some embodiments, the counterweight system further includes a movable member 5. The transmission device 2 is rotatably mounted on the base 1. The movable member 5 is connected to the transmission device 2 and is movably mounted on the counterweight 3 so that when the transmission device 2 rotates relative to the base 1, it drives the movable member 5 and the counterweight 3 to move relative to the base 1 in a first direction, while the movable member 5 moves relative to the counterweight 3 in a second direction. The first direction and the second direction have a first preset angle.

[0039] By setting a movable part 5 that is movable relative to the counterweight 3, the movement path of the counterweight 3 can be guided, so that the counterweight 3 can move in a straight line in the first direction. While the movable part 5 moves in the first direction, it can also move relative to the counterweight 3 in the second direction. The movement of the movable part 5 in the first direction and the movement in the second direction are combined to rotate with the transmission device 2 relative to the base 1.

[0040] The first direction and the second direction have a first preset angle, the size of which can vary depending on the direction of movement of the movable member 5 relative to the counterweight 3 and the direction of movement of the counterweight 3 relative to the base 1. The first preset angle can be an acute angle or a right angle.

[0041] In some embodiments, the first direction can be the travel direction x of the engineering machinery where the base 1 is located, and the second direction can be the direction y perpendicular to the first direction x.

[0042] like Figure 5 As shown, when the counterweight 3 is in the first position, the distance between the counterweight 3 and the rotary mechanism connected to the bottom of the base 1 is the smallest.

[0043] When it is necessary to move the overall center of gravity of base 1 backward, drive device 4 drives transmission device 2 to swing backward. Transmission device 2 drives movable part 5 to move backward and simultaneously moves outward relative to counterweight 3, causing counterweight 3 to move backward. The specific distance the counterweight 3 moves backward can be adjusted according to actual needs. Figure 6 As shown, when the counterweight 3 is in the second position, the distance between the counterweight 3 and the rotary mechanism connected to the bottom of the base 1 is at its maximum.

[0044] In some embodiments, there are two transmission devices 2 and two movable members 5. Each transmission device 2 is connected to a corresponding movable member 5. When the two transmission devices 2 rotate relative to the base 1, they respectively drive the two movable members 5 to move closer to each other or further away from each other.

[0045] By setting up two transmission devices 2 and two movable parts 5, and connecting both movable parts 5 to the counterweight 3, it is beneficial to improve the balance of the counterweight 3, prevent the counterweight 3 from swinging during the adjustment process, and avoid affecting the reliability of the movement and the accuracy of the adjustment.

[0046] like Figure 7 and Figure 8 As shown, in some embodiments, the counterweight 3 includes a counterweight body 31 and a connecting beam 32. The side of the connecting beam 32 is provided with a slide rail 321, and the movable member 5 is provided with a slide groove 51, into which the slide rail 321 is inserted.

[0047] By setting a slide rail 321 on the connecting beam 32 and a slide groove 51 on the movable part 5, the movement of the movable part 5 relative to the counterweight 3 can be guided by the cooperation of the slide rail 321 and the slide groove 51, thereby improving the accuracy and reliability of the movement of the movable part 5.

[0048] In some embodiments, the end of the slide rail 321 is provided with a blocking member, which limits the maximum movement distance of the movable member 5 relative to the counterweight 3, preventing the movable member 5 from leaving the counterweight 3, causing the counterweight 3 to fall accidentally, damage other components, or cause a safety accident.

[0049] like Figure 4 As shown, in some embodiments, the counterweight 3 includes a connecting column 33 connecting the counterweight body 31 and the connecting beam 32. The connecting column 33 has a preset height so that weight-adding blocks can be inserted between the counterweight body 31 and the connecting beam 32 to increase the weight of the counterweight 3.

[0050] By setting the connecting column 33, a preset distance can be made between the counterweight body 31 and the connecting beam 32, so that more weight-adding blocks can be set between the counterweight body 31 and the connecting beam 32 to increase the total weight of the counterweight 3 as needed.

[0051] Through holes can be provided on the weighting block so that it can be fitted onto the connecting post 33.

[0052] In some embodiments, the number of connecting columns 33 is two. By setting two connecting columns 33, the support stability of the connecting beam 32 can be improved.

[0053] The connecting column 33 can be cylindrical, cuboid, or other column shapes.

[0054] In some embodiments, the connecting column 33 and the counterweight body 31 can be integrally formed, or they can be connected by threaded connection or other means.

[0055] In some embodiments, the transmission device 2 includes an adapter 21 and a connector 22. The adapter 21 is rotatably mounted on the base 1. The adapter 21 connects the drive device 4 and the connector 22. The connector 22 is provided with a plug-in portion. The movable member 5 is provided with a plug-in interface 52. The plug-in portion is inserted into the plug-in interface 52 to realize the plug-in connection between the connector 22 and the movable member 5.

[0056] By providing a connector 22 with a plug-in portion and a connector interface 52 on the movable member 5, a plug-in connection between the connector 22 and the movable member 5 can be achieved by inserting the plug-in portion into the connector interface 52. The shapes of the plug-in portion and the connector interface 52 are matched, which facilitates quick connection and improves connection efficiency.

[0057] In some embodiments, the insertion interface 52 is U-shaped, which facilitates the insertion part to enter from the side. After the insertion part enters the insertion interface 52, it can rotate relative to the movable member 5 to achieve the insertion connection, while preventing the insertion part from falling off.

[0058] In some embodiments, the adapter 21 includes a first adapter portion 211 and a second adapter portion 212. The first adapter portion 211 is drivenly connected to the driving device 4, and the second adapter portion 212 is connected to the connector 22. The first adapter portion 211 and the second adapter portion 212 are integrally connected and rotatably connected to the base 1, and a second preset angle is formed between the first adapter portion 211 and the second adapter portion 212. Figure 9 As shown, one side of the base 1 is cut open, revealing the structure of the adapter 21.

[0059] By setting a first adapter 211 and a second adapter 212 with a second preset angle, the adapter 21 as a whole can have an adapter function, so as to adapt to scenarios where the drive device 4 and the connector 22 are respectively set in different positions.

[0060] like Figure 3 and Figure 9 As shown, in some embodiments, the base 1 is provided with a receiving cavity 11, the driving device 4 is disposed inside the receiving cavity 11, the transmission device 2 is disposed outside the receiving cavity 11, the receiving cavity 11 is provided with a through hole 12, and the driving device 4 passes through the through hole 12 and is connected to the transmission device 2.

[0061] By providing the through hole 12, the connection between the drive device 4 located inside the receiving cavity 11 of the base 1 and the adapter 21 located outside the receiving cavity 11 can be realized.

[0062] By placing the drive device 4 inside the receiving cavity 11 of the base 1, it is possible to make full use of the internal space of the base 1 and effectively protect the drive device 4, prevent damage to the drive device 4, and extend the service life of the drive device 4.

[0063] The drive unit 4 can be a hydraulic cylinder, a pneumatic cylinder, or a motor.

[0064] In some embodiments, the drive device 4 includes two hydraulic cylinders, the cylinder barrels of the two hydraulic cylinders are fixedly connected to the base 1, and the cylinder rods are respectively connected to the corresponding transmission devices 2 through the through holes 12 on both sides.

[0065] It is understandable that when the drive unit 4 retracts, a portion of the adapter 21 in the transmission unit 2 can also pass through the through hole 12 into the receiving cavity 11.

[0066] like Figure 10 and Figure 11 As shown, in some embodiments, the counterweight system also includes a frame 6 and a positioning block 7. The base 1 is rotatably mounted on the frame 6, and the bottom of the counterweight 3 is provided with a positioning groove 34. The positioning block 7 can be embedded in the positioning groove 34 to position the initial position of the counterweight 3.

[0067] Before connecting the counterweight 3 to the transmission device 2, the counterweight 3 can be placed on the frame 6. By setting the positioning block 7 and the positioning groove 34, when the counterweight 3 is placed on the frame 6, the positioning block 7 on the frame 6 can be inserted into the positioning groove 34 on the counterweight 3 to initially position the counterweight 3. For example, the counterweight 3 can be placed in a position that is convenient for connecting to the transmission device 2, eliminating the need for subsequent repositioning of the counterweight 3 during connection and effectively improving connection efficiency.

[0068] like Figure 12 , Figure 13 and Figure 14As shown, in some embodiments, the connecting beam 32 of the counterweight 3 has a first connecting hole 322 on the side near the counterweight body 31, and the top of the connecting column 33 of the counterweight 3 has a second connecting hole 331. The connecting beam 32 and the connecting column 33 can be connected by passing a pin through the first connecting hole 322 and the second connecting hole 331.

[0069] Two baffles can be installed on the side of the connecting beam 32 near the counterweight body 31, and the top of the connecting column 33 is provided with a plug-in part that inserts between the two baffles. The two baffles can limit the plug-in part, which helps to improve the connection stability between the connecting beam 32 and the connecting column 33. Each of the two baffles is provided with a first connecting hole 322, and the plug-in part is provided with a second connecting hole 331.

[0070] Based on the aforementioned counterweight system, this disclosure also proposes an engineering machine that includes the aforementioned counterweight system.

[0071] The construction machinery disclosed herein may include cranes, forklifts, hoists, excavators, loaders, and bulldozers, etc.

[0072] The positive technical effects of the counterweight system in the above embodiments are also applicable to construction machinery, and will not be elaborated here.

[0073] The following is in conjunction with the appendix Figures 2 to 14 The structure and operation of one embodiment of the counterweight system provided in this disclosure will be described: like Figures 2 to 4 As shown, the counterweight system includes a base 1, a transmission device 2, a counterweight 3, a drive device 4, a movable part 5, and a frame 6.

[0074] like Figure 2 As shown, the frame 6 is the main body of the mobile crane chassis, used to support the entire upper structure during operation. The base 1, acting as a turntable, is mounted on the frame 6 via a slewing mechanism. The base 1 can rotate relative to the frame 6 around a vertical axis, thus driving the upper crane to rotate. The counterweight 3 is suspended at the rear of the base 1. The counterweight 3 is mainly used to balance the overturning moment generated when the crane is lifting a load, maintaining the stability of the entire machine. The position of the center of gravity of the counterweight 3 relative to the center of rotation directly affects the crane's anti-overturning capability.

[0075] like Figure 3As shown, the base 1 has an internal cavity 11, with two through holes 12 on each side. The drive device 4 is disposed within the cavity 11. The transmission device 2 includes an adapter 21 and a connector 22. The adapter 21 is rotatably connected to the outside of the base 1, and one end of the adapter 21 can enter the cavity 11 through the through hole 12. One end of the adapter 21 is connected to the drive end of the drive device 4. The connector 22 is connected to the other end of the adapter 21, and the connector 22 is entirely located outside the cavity 11. The connector 22 is connected to a movable member 5 mounted on the counterweight 3. The connector 22 has a vertically movable telescopic part that can move up and down relative to the base 1 to lift or lower the counterweight 3. It can also lower itself when needed to connect to the counterweight 3, or rise away from the counterweight 3 after unloading it.

[0076] like Figure 4 As shown, the counterweight 3 includes a counterweight body 31, a connecting beam 32, and a connecting column 33. The connecting column 33 connects the counterweight body 31 and the connecting beam 32. The movable member 5 is slidably mounted on the connecting beam 32.

[0077] When the drive end of the drive device 4 extends, it can drive the adapter 21 to rotate relative to the base 1. The rotation of the adapter 21 causes the connector 22 to swing backward. During the swing of the connector 22, it drives the movable part 5 and the counterweight 3 connected to the connector 22 to move backward. At the same time, the movable part 5 will also move outward relative to the counterweight 3.

[0078] like Figure 5 As shown, the drive unit 4 is in the retracted state, the counterweight 3 is at the front, and the center of gravity is forward. Figure 6 As shown, the drive device 4 is in the extended state, the counterweight 3 is located at the rear, and the center of gravity is at the rear.

[0079] like Figure 7 As shown, two slide rails 321 are provided on each side of the connecting beam 32. Figure 8 As shown, the movable member 5 is provided with a sliding groove 51, and the movable member 5 and the connecting beam 32 are slidably engaged with the slide rail 321 through the sliding groove 51. The movable member 5 is also provided with a plug-in interface 52 for easy quick connection with the telescopic part of the connecting member 22.

[0080] like Figure 9 As shown, the adapter 21 includes a first adapter portion 211 and a second adapter portion 212, which are integrally formed and have an included angle. One end of the first adapter portion 211 can pass through the through hole 12 into the receiving cavity 11 and connect to the driving end of the driving device 4, while the second adapter portion 212 is connected to the connector 22.

[0081] like Figure 10 As shown, the bottom of the counterweight body 31 is provided with a positioning groove 34. Figure 11 As shown, the top surface of the frame 6 is provided with a positioning block 7. When the counterweight 3 falls on the frame 6, the positioning block 7 is inserted into the positioning groove 34.

[0082] like Figures 12 to 14 As shown, the connecting beam 32 and the connecting column 33 are connected through the first connecting hole 322 and the second connecting hole 331.

[0083] The specific implementation method of this embodiment is as follows: 1. First, place the counterweight 3 on the frame 6 and position it by cooperating with the positioning block 7 and the positioning groove 34; 2. After connecting the connector 22 on the transmission device 2 to the connector 52 on the movable part 5, the counterweight 3 is lifted. 3. After the transmission device 2 is connected to the counterweight 3, the drive device 4 can extend to drive the connecting parts 22 on both sides to swing backward, and the movable part 5 slides relative to the counterweight 3. Under the simultaneous action of the two actions, the counterweight 3 moves backward; when the drive device 4 is retracted, the counterweight 3 can move forward.

[0084] The counterweight system embodiment provided in this disclosure can achieve the installation of the counterweight at the same position on the frame, and at the same time achieve the back-and-forth movement of the counterweight through the combined movement of the rotating device and the movable part, so as to meet the need for real-time adjustment of the counterweight position during crane operation.

[0085] The embodiments disclosed herein can effectively solve the technical problems of complex, inefficient, and inconvenient operation of existing counterweight installation and repositioning processes, making crane installation and operation simpler and more convenient, greatly improving crane operating efficiency and controllability, and covering more operating scenarios.

[0086] The installation and use of the counterweight in this embodiment is simpler and more convenient. The counterweight can be installed in a fixed position without repeatedly adjusting its position. After installation, the counterweight position can be adjusted in real time, making operation more convenient. Moreover, the counterweight position is not limited to the front and rear positions, but can be placed at any position between the front and rear positions, providing users with more options.

[0087] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0088] Those skilled in the art will understand that, in the methods described in the specific embodiments, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and not to limit them; although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this disclosure or equivalent substitutions can still be made to some technical features without departing from the principles of this disclosure, and such modifications and equivalent substitutions should all be covered within the scope of the technical solutions claimed in this disclosure.

Claims

1. A counterweight system, comprising: Base (1); The transmission device (2) is movably mounted on the base (1); The counterweight (3) is connected to the transmission device (2); and A drive device (4) is installed on the base (1). The drive device (4) is driven to connect with the transmission device (2). The drive device (4) is configured to drive the transmission device (2) to move relative to the base (1). The transmission device (2) drives the counterweight (3) to move relative to the base (1) to change the center of gravity position of the base (1).

2. The counterweight system according to claim 1, characterized in that, It also includes a movable part (5), the transmission device (2) is rotatably mounted on the base (1), the movable part (5) is connected to the transmission device (2), and the movable part (5) is movably mounted on the counterweight (3) so that when the transmission device (2) rotates relative to the base (1), it drives the movable part (5) and the counterweight (3) to move relative to the base (1) in a first direction, and at the same time the movable part (5) moves relative to the counterweight (3) in a second direction, with a first preset angle between the first direction and the second direction.

3. The counterweight system according to claim 2, characterized in that, The number of transmission devices (2) and movable parts (5) are both two. Each transmission device (2) is connected to the corresponding movable part (5). When the two transmission devices (2) rotate relative to the base (1), they respectively drive the two movable parts (5) to move closer to each other or further away from each other.

4. The counterweight system according to claim 2, characterized in that, The counterweight (3) includes a counterweight body (31) and a connecting beam (32). The side of the connecting beam (32) is provided with a slide rail (321). The movable part (5) is provided with a groove (51). The slide rail (321) is inserted into the groove (51).

5. The counterweight system according to claim 4, characterized in that, The counterweight (3) includes a connecting column (33) connecting the counterweight body (31) and the connecting beam (32). The connecting column (33) has a preset height so that weight-adding blocks can be inserted between the counterweight body (31) and the connecting beam (32) to increase the weight of the counterweight (3).

6. The counterweight system according to claim 2, characterized in that, The transmission device (2) includes an adapter (21) and a connector (22). The adapter (21) is rotatably mounted on the base (1). The adapter (21) connects the drive device (4) and the connector (22). The connector (22) is provided with a plug-in part. The movable part (5) is provided with a plug-in interface (52). The plug-in part is inserted into the plug-in interface (52) to realize the plug-in connection between the connector (22) and the movable part (5).

7. The counterweight system according to claim 6, characterized in that, The adapter (21) includes a first adapter (211) and a second adapter (212). The first adapter (211) is driven to be connected to the driving device (4), and the second adapter (212) is connected to the connector (22). The first adapter (211) and the second adapter (212) are connected as a whole and rotatably connected to the base (1). The first adapter (211) and the second adapter (212) have a second preset angle between them.

8. The counterweight system according to claim 1, characterized in that, The base (1) is provided with a receiving cavity (11), the driving device (4) is disposed in the receiving cavity (11), the transmission device (2) is disposed outside the receiving cavity (11), the receiving cavity (11) is provided with a through hole (12), and the driving device (4) passes through the through hole (12) and is connected to the transmission device (2).

9. The counterweight system according to claim 1, characterized in that, It also includes a frame (6) and a positioning block (7). The base (1) is rotatably mounted on the frame (6). The bottom of the counterweight (3) is provided with a positioning groove (34). The positioning block (7) can be embedded in the positioning groove (34) to position the initial position of the counterweight (3).

10. An engineering machinery, characterized in that, Including the counterweight system as claimed in any one of claims 1 to 9.

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