A skid steer device, control system and excavator

Abstract

The application discloses a sliding counterweight device, a control system and an excavator, and relates to the technical field of excavators. The application discloses a sliding counterweight device, a control system and an excavator, and relates to the technical field of excavators. One of the piston rod and the cylinder body of the counterweight telescopic oil cylinder (3) is hinged with the counterweight (1), and the other is hinged with the rotating platform (2); the rotating platform (2) is circumscribed with a rotating platform support (21), the counterweight (1) is supported on the rotating platform support (21) and is detachably connected with the rotating platform support (21); when the counterweight (1) is in a disassembled state with the rotating platform support (21), the counterweight telescopic oil cylinder (3) can drive the counterweight (1) to slide along the rotating platform support (21) towards or away from the rotating platform (2). The application can meet different counterweight requirements by changing the force arm without changing the counterweight weight, and has high stability.

Description

Technical Field

[0001] This invention relates to a sliding counterweight device, a control system, and an excavator, belonging to the field of excavator technology. Background Technology

[0002] In daily production and construction, excavators are widely used in various construction fields, and are usually equipped with a counterweight of appropriate weight at the rear to ensure the stability of the entire machine. On the one hand, due to the complexity of excavator working conditions, different weights of counterweight are needed to meet the requirements of each working condition; on the other hand, multi-functional excavators with multiple implements are favored by many customers, especially in military excavations, but they also require different weights of counterweight. Obviously, it is impractical to provide different weights of counterweight for different working conditions of excavators. Therefore, a new counterweight device is needed to meet the counterweight requirements of different working conditions without changing the weight of the counterweight. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a sliding counterweight device, control system and excavator, which can meet different counterweight requirements by changing the lever arm without changing the counterweight weight, and has high stability.

[0004] To achieve the above objectives, the present invention is implemented using the following technical solution:

[0005] In a first aspect, the present invention provides a sliding counterweight device, including a counterweight 1, a turntable 2, and a telescopic cylinder 3; one of the piston rod and the cylinder body of the telescopic cylinder 3 is hinged to the counterweight 1, and the other is hinged to the turntable 2.

[0006] The turntable 2 is externally connected to the turntable support 21, and the counterweight 1 is supported on the turntable support 21 and detachably connected to the turntable support 21. When the counterweight 1 is detached from the turntable support 21, the counterweight telescopic cylinder 3 can drive the counterweight 1 to slide along the direction of the turntable 2.

[0007] Furthermore, the turntable support 21 is provided with a turntable friction plate 2-1 on the side facing the counterweight, and the counterweight 1 is provided with a counterweight friction plate 1-7 on the side facing the turntable friction plate 2-1. When the counterweight 1 slides, the turntable friction plate 2-1 and the counterweight friction plate are in contact.

[0008] Furthermore, the counterweight 1 is provided with a lubrication pipe 15, the counterweight friction plate 1-7 is provided with an elongated groove 1-7.2, and the elongated groove 1-7.2 is provided with an oil passage hole 1-7.3; the grease inlet of the lubrication pipe 15 is connected to the oil cup 1-3, and the grease inlet of the lubrication pipe 15 is connected to the corresponding oil passage hole 1-7.3.

[0009] Furthermore, a first gap is left between the grease inlet of the lubrication pipe 15 and the counterweight friction plate 1-7.

[0010] Furthermore, the counterweight 1 is equipped with a counterweight mounting base 12 and a counterweight threaded seat 16. The counterweight mounting base 12 is located between the counterweight friction plate 1-7 and the counterweight threaded seat 16. The counterweight friction plate 1-7 is fixedly connected to the counterweight threaded seat 16 by counterweight friction plate fixing bolts 1-9.

[0011] Furthermore, a limiting block 1-8 is connected to the counterweight friction plate 1-7, and a limiting block 1-8 is provided on each side of the turntable support 21 for limiting the sliding movement of the counterweight 1.

[0012] Furthermore, the counterweight 1 is detachably connected to the turntable support 21 by counterweight fixing bolts 1-6. The counterweight fixing bolts 1-6 pass through the turntable support 21, the turntable friction plate 2-1, the counterweight friction plate 1-7, the counterweight mounting seat 12, and are screwed to the counterweight threaded seat 16 in sequence.

[0013] Furthermore, the turntable friction plate 2-1 is provided with elongated holes corresponding to the possible target sliding positions of the counterweight 1; the turntable friction plate 2-1 extends beyond the turntable support 21 and leaves a second gap between it and the limiting block 1-8, and the maximum adjustable gap after the counterweight fixing bolt 1-6 is inserted into the elongated hole is not less than the second gap.

[0014] In a second aspect, the present invention provides a control system for a sliding counterweight device, including a controller 4, a sensor 5, a control panel 6, and the sliding counterweight device described in any one of the first aspects.

[0015] The sensor 5 is used to collect electrical signals that can reflect the assembly state of the counterweight 1 and the turntable support 21; the assembly state includes disassembly state and locking state;

[0016] The control panel 6 is used to receive the counterweight sliding mode set by the user, and the counterweight sliding mode includes at least the counterweight sliding direction;

[0017] The controller 4 is used to determine the assembly status of the counterweight and the turntable support based on the electrical signal. In response to the assembly status being in the disassembly state, the controller 4 drives the counterweight to perform a sliding operation according to the counterweight sliding mode set by the user through the counterweight telescopic cylinder 3. In response to the assembly status being in the locked state, the controller controls the control panel 4 to output and display subsequent operation instructions.

[0018] Thirdly, the present invention provides an excavator including a control system for a sliding counterweight device as described in any of the first aspects or a sliding counterweight device as described in the second aspect.

[0019] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0020] This invention discloses a sliding counterweight device, including a counterweight, a turntable, and a counterweight telescopic cylinder. The piston rod / cylinder body of the counterweight telescopic cylinder is hinged to the counterweight, and the cylinder body / piston rod of the counterweight telescopic cylinder is hinged to the turntable. The turntable is externally connected to a turntable support, and the counterweight is supported on the turntable support and detachably connected to the turntable support. When the counterweight and the turntable support are locked, the counterweight and the turntable remain relatively stationary, satisfying the counterweight requirements of the turntable. When the counterweight and the turntable support are detached, the counterweight telescopic cylinder drives the counterweight to slide along the turntable support towards or away from the turntable. Without changing the weight of the counterweight, by changing the distance between the counterweight and the turntable, i.e., by changing the lever arm, the counterweight requirements of different working conditions are met. Furthermore, the counterweight being supported on the turntable support reduces the structural strength requirements of the counterweight telescopic cylinder and ensures the stability of the counterweight during the sliding process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a sliding counterweight device provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of a counterweight sealing plate provided in an embodiment of the present invention;

[0023] Figure 3 This is a partial structural diagram of a sliding counterweight device in its non-sliding state according to an embodiment of the present invention;

[0024] Figure 4 This is a partial structural diagram of a sliding counterweight device in a backward sliding state according to an embodiment of the present invention;

[0025] Figure 5 yes Figure 3 A partial cross-sectional view along direction A;

[0026] Figure 6 yes Figure 4 A partial cross-sectional view along direction B;

[0027] Figure 7 Figure 6 A magnified view of a portion within the central circular area;

[0028] Figure 8 This is a schematic diagram of the structure of a limiting block provided in an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of a counterweight friction plate provided in an embodiment of the present invention;

[0030] Figure 10This is a schematic diagram of the structure of a turntable friction plate provided in an embodiment of the present invention;

[0031] Figure 11 This is a block diagram illustrating the working principle of a control system for a sliding counterweight device provided in an embodiment of the present invention.

[0032] In the diagram: 1. Counterweight; 2. Turntable; 3. Counterweight telescopic cylinder; 4. Controller; 5. Position sensor; 6. Control panel; 11. Counterweight sealing plate; 111. Through hole; 12. Counterweight mounting base; 13. Counterweight cylinder lifting lug; 14. Oil cup mounting base; 15. Lubrication pipe; 16. Counterweight threaded seat; 21. Turntable support; 22. Turntable cylinder lifting lug; 41. Sliding mode; 1-1. U-shaped plate; 1-2. Cylinder guard plate; 1-3. Oil cup; 1-4. Pin fixing bolt; 1-5. First pin; 1-6. Counterweight fixing bolt Bolt; 1-7, counterweight friction plate; 1-7.1, first rounded corner; 1-7.2, oil passage hole; 1-7.3, elongated groove; 1-8, limiting block; 1-8.1, second rounded corner; 1-9, counterweight friction plate fixing bolt; 1-10, limiting block fixing bolt; turntable friction plate; 2-1, turntable friction plate; 2-1.1, countersunk hole; 2-1.2, third rounded corner; 2-1.3, oblong hole; 2-2, pin fixing bolt; 2-3, second pin; 11, opening; 411, forward mode; 412, backward mode. Detailed Implementation

[0033] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.

[0034] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0035] Example 1:

[0036] like Figure 1 The diagram shown is a structural schematic of a sliding counterweight device provided in Embodiment 1 of the present invention, including: counterweight 1, turntable 2 and counterweight telescopic cylinder 3.

[0037] The counterweight telescopic cylinder 3 includes a cylinder body and a piston rod passing through the cylinder body, and is enclosed by cylinder guard plates 1-2 to protect the counterweight telescopic cylinder 3. (See also...) Figure 1The piston rod is hinged to the counterweight 1, and the cylinder body is hinged to the turntable 2. The hinge structure can be achieved through a combination of lugs and pins. Specifically, a counterweight cylinder lug 13 can be provided on the counterweight, and a turntable cylinder lug 22 can be provided on the turntable 2. A first pin 1-5 passes through the counterweight cylinder lug 13 and the piston rod to achieve the hinge between the piston rod and the counterweight; a second pin 2-3 passes through the turntable cylinder lug 22 and the cylinder body to achieve the hinge between the cylinder body and the turntable 2. As a variation, the piston rod can also be hinged to the turntable 2, and the cylinder body can be hinged to the counterweight 1.

[0038] Turntable 2 is externally connected to turntable support 21. Counterweight 1 is supported on turntable support 21 and is detachably connected to turntable support 21. When counterweight 1 and turntable support 21 are in the detached state, counterweight telescopic cylinder 3 can drive counterweight 1 to slide along turntable support 21 towards or away from turntable 2. Counterweight telescopic cylinder 3 can only drive counterweight 1 to perform linear motion and will not deviate. By adjusting the relative position of counterweight and turntable, the lever arm can be changed. Without changing the weight of counterweight, the counterweight requirements of different working conditions can be met. Furthermore, the fact that counterweight 1 is supported on turntable support can reduce the structural strength requirements of counterweight telescopic cylinder 3, while ensuring the stability of counterweight 1 during the sliding process.

[0039] As an embodiment of the present invention, the counterweight 1 is detachably connected to the turntable support 21 by counterweight fixing bolts 1-6. The counterweight fixing bolts 1-6 pass through the turntable support 21, the turntable friction plate 2-1, the counterweight friction plate 1-7, the counterweight mounting seat 12 and the counterweight threaded seat 16 in sequence, ensuring that the counterweight 1 can only move back and forth (taking the coordinate direction shown in the figure as an example).

[0040] To further improve the stability of the counterweight, in this embodiment of the invention, two counterweight telescopic cylinders 3 are arranged. The two counterweight telescopic cylinders 3 are symmetrically distributed about the center of gravity of the counterweight 1. The hinge points between the two counterweight telescopic cylinders 3 and the counterweight are not higher than the center of gravity of the counterweight 1.

[0041] The position of the counterweight's center of gravity (front-back, left-right, up-down) can be achieved through density-based filling. Furthermore, the front-back direction of the counterweight's center of gravity is designed as follows: See [link / reference needed]. Figure 4 When counterweight 1 slides backward to its maximum position, i.e., when counterweight fixing bolts 1-6 are in position one, position two, position three, or position four, the front-back position of the center of gravity of counterweight 1 is in front of the line connecting position one and position two, so as to ensure the stability of the counterweight at the maximum sliding distance.

[0042] The bottom of counterweight 1 has a groove corresponding to the counterweight telescopic cylinder 3, and a counterweight mounting seat 12 is provided in the groove. Counterweight 1 is supported on the turntable support 21 by the counterweight mounting seat. See Figure 2A counterweight sealing plate 11 is provided on the side of the counterweight 1 closest to the turntable. A U-shaped groove is provided on the counterweight sealing plate 11 at the position corresponding to the counterweight mounting base 12. To facilitate the installation of the counterweight telescopic cylinder, a through hole 111 is provided on the counterweight sealing plate 11 for the counterweight telescopic cylinder to pass through. A U-shaped plate 1-1 is provided in the through hole 111. The U-shaped plate 1-1 can partially cover the through hole 111, ensuring the sealing of the internal space of the counterweight 1 and strengthening the structural strength around the through hole 111.

[0043] like Figures 5 to 7 As shown, the counterweight 1 is also equipped with a counterweight threaded seat 16 and a counterweight friction plate 1-7. A counterweight mounting base 12 is located between the counterweight threaded seat 16 and the counterweight friction plate 1-7. The counterweight friction plate 1-7 is fixedly connected to the counterweight threaded seat 16 by counterweight friction plate fixing bolts 1-9. Correspondingly, the turntable support 21 has a turntable friction plate 2-1 on the side facing the counterweight 1. (See Figure 1) Figure 10 The turntable friction plate 2-1 has multiple countersunk holes, and countersunk screws passing through these holes fix the turntable friction plate 2-1 to the turntable support 21. When the counterweight 1 slides, the upper surface of the turntable friction plate 2-1 is in contact with the lower surface of the counterweight friction plate 1-7. The counterweight friction plate 1-7 and the turntable friction plate 2-1 can be made of wear-resistant materials to reduce wear during sliding. When severe wear occurs, only the corresponding friction plate needs to be replaced, ensuring sliding accuracy and the sliding stability of the counterweight 1.

[0044] See Figure 7 , Figure 8 Limiting blocks 1-8 are connected to the bottom of the counterweight friction plate 1-7 and are fixedly connected to the counterweight threaded seat 16 by limiting block fixing bolts 1-10. One limiting block 1-8 is provided on each side of the turntable support 21 for limiting the sliding movement of the counterweight 1. The limiting block 1-8 is designed with an L-shaped structure, with its bottom protruding inwards and extending to the bottom of the turntable support 21. The protruding structure can prevent large displacements between the counterweight 1 and the turntable support 21 in the vertical direction, ensuring the stability of the counterweight 1's sliding movement.

[0045] To reduce wear and frictional resistance during sliding of related components, a lubrication mechanism is provided inside the counterweight 1 in this embodiment of the invention, such as... Figure 5As shown, the lubrication mechanism includes an oil cup 1-3, an oil cup mounting base 14, and a lubrication pipe 15. The grease inlet of the lubrication pipe 15 is connected to the oil cup mounting base 14, and the grease outlet of the lubrication pipe 15 extends to the counterweight friction plate 1-7. Multiple grease outlets can be configured according to the length of the counterweight friction plate 1-7. The grease flowing from the grease outlet can pass through the counterweight friction plate 1-7 and enter between the counterweight friction plate 1-7 and the turntable friction plate 2-1. In one embodiment of the invention, the oil cup 1-3 is positioned above the counterweight threaded seat 16, and the lubrication pipe 15 sequentially passes through the counterweight threaded seat 16 and the counterweight mounting base 12, extending above the counterweight friction plate 1-7. A first gap d is left between the grease outlet and the upper surface of the counterweight friction plate 1-7. The design of the first gap d ensures that the grease reaches the oil passage hole 1-7.2 of the counterweight friction plate 1-7 while preventing manufacturing errors from affecting the installation accuracy of the counterweight friction plate 1-7.

[0046] like Figure 9 As shown, multiple elongated grooves 1-7.3 are formed in the counterweight friction plate 1-7, and oil holes 1-7.2 are formed in each elongated groove 1-7.3. The elongated grooves 1-7.3 can extend along the width direction of the counterweight friction plate 1-7. The grease flowing out from the lubrication pipe reaches the gap between the counterweight friction plate 1-7 and the turntable friction plate 2-1 through the oil holes 1-7.2 and the elongated grooves 1-7.3.

[0047] like Figure 7 As shown, the rotary table friction plate 2-1 extends beyond the rotary table support 21 to fully protect the rotary table support 21 from wear. A second gap L2 is left between the rotary table friction plate 2-1 and the limiting block 1-8, and a third gap L3 is left between the protruding structure of the limiting block 1-8 and the rotary table support 21. The length of the elongated groove 1-7.2 is greater than the length of the inner side of the limiting block 1-8, and the excess part is set as an offset gap L1. The setting of the offset gap L1 can reduce the assembly accuracy requirements, and even if there are assembly errors, the grease can still smoothly enter the second gap L2 and the third gap L3.

[0048] See Figure 10 The turntable friction plate 2-1 has elongated holes corresponding to the possible target sliding positions of the counterweight 1. When the counterweight and the turntable support are in the locked state, the counterweight fixing bolts 1-6 pass through these elongated holes. See also Figure 3 or Figure 4 , Figure 10The three elongated holes should be located on the lines connecting positions one and two, three and four, and five and six, respectively. The elongated holes are designed to ensure that the counterweight can still be smoothly assembled after position adjustment. Assuming the counterweight fixing bolt 1-6 is inserted into the elongated hole, the gap between the elongated hole and the counterweight fixing bolt 1-6 is the fourth gap L4. This fourth gap L4 must be greater than the second gap L2 between the turntable friction plate 2-1 and the limit block 1-8. This ensures that even when the counterweight 1 experiences a maximum left-right offset distance of L2 during sliding, the counterweight fixing bolt 1-6 can still be installed.

[0049] To reduce structural damage caused by contact, the sliding counterweight device provided by this invention has rounded corners on multiple structural components, such as... Figure 8 As shown, multiple second rounded corners 1-8.1 are designed on the surface of the limiting block 1-8. This can prevent structural damage caused by the limiting block 1-8 contacting the surface of the turntable friction plate 2-1 and the turntable support 21 during the sliding process of the counterweight 1. Figure 10 As shown, the four edges of the turntable friction plate 2-1 are provided with several first rounded corners 1-7.1, which can prevent structural damage when the counterweight friction plate 1-7 and the turntable friction plate 2-1 come into contact during the sliding process. The four edges of the turntable friction plate 2-1 are provided with several third rounded corners 2-1.2, which can prevent structural damage when the turntable friction plate 2-1 comes into contact with the surface of the counterweight friction plate 1-7 during the sliding process.

[0050] Example 2:

[0051] This invention provides a control system for a sliding counterweight device, such as... Figure 11 As shown, it includes a controller 4, a sensor, a control panel 6, and a sliding counterweight device as described in Embodiment 1.

[0052] The sensor is used to collect electrical signals that reflect the assembly state of the counterweight 1 and the turntable support 21; the assembly state includes a disassembled state and a locked state. By installing sensors at the positions of the counterweight fixing bolts 1-6 and detecting the installation positions of the counterweight fixing bolts 1-6, the detected electrical signals are sent to the controller 4 for processing. In this embodiment of the invention, the sensor is a position sensor 5. Figure 3 For example, when counterweight fixing bolts 1-6 are detected at positions one, two, five, and six, it indicates that counterweight 1 has not slipped and is locked to the turntable support 21. If counterweight fixing bolts 1-6 are not detected at positions one through six, it indicates that counterweight 1 is disassembled from the turntable support 21 and can be driven to slide. The position sensor 5 can be a distance sensor or a reflective photoelectric sensor as used in existing technologies.

[0053] The control panel 6 is used to receive the counterweight sliding mode set by the user and can also be used to display operation commands. The counterweight sliding mode includes: forward mode 411 and backward mode 412. The operation commands can be "Please operate the counterweight backward sliding button", "Please remove the counterweight fixing bolt", "Please install the counterweight fixing bolt", etc., or other commands, such as alarm commands.

[0054] The controller 4 is used to determine the assembly status of the counterweight 1 and the turntable support 21 based on the electrical signal fed back by the sensor 5. In response to the assembly status being disassembled, the controller 4 drives the counterweight to perform sliding operation according to the counterweight sliding mode set by the user through the counterweight telescopic cylinder 3. In response to the assembly status being locked, the controller controls the control panel 4 to output and display subsequent operation instructions.

[0055] Taking backward sliding as an example, when the user enters the backward mode 412 of the counterweight sliding mode 41 from the control panel 6, the position sensor 5 enters the working mode for the first time. If it detects that none of the counterweight fixing bolts 1-6 are installed at positions one, two, five, and six, it sends a signal to the controller 4 and displays "Please operate the counterweight backward sliding button" on the control panel 6. After the user operates, the counterweight slides backward to the distance pre-stored in the controller 4 and stops. Then, the position sensor 5 enters the working mode for the second time. If it detects that all of the counterweight fixing bolts 1-6 are installed at positions one, two, three, and four, it sends a signal to the controller 4 and automatically exits the counterweight sliding mode 41. If the position sensor 5 detects that any or all of the counterweight fixing bolts 1-6 are installed at positions one, two, five, and six when it first enters the working mode, it sends a signal to the controller 4 and displays "Please remove the counterweight fixing bolts" on the control panel 6. The next operation can only be performed after the user removes the counterweight fixing bolts. If the position sensor 5 detects that the counterweight fixing bolts 1-6 are not installed at any one or all of the positions 1, 2, 3, and 4 when it enters the working mode for the second time, it will send a signal to the controller 4 and display "Please install the counterweight fixing bolts" on the control panel 6. The next operation can only be performed after the user installs the counterweight fixing bolts 1-6.

[0056] Example 3:

[0057] This invention provides an excavator, including the control system of the sliding counterweight device described in Embodiment 1 or the sliding counterweight device described in Embodiment 2.

[0058] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A sliding counterweight device, characterized in that, It includes a counterweight (1), a turntable (2), and a counterweight telescopic cylinder (3); The piston rod and cylinder body of the counterweight telescopic cylinder (3) are hinged to the counterweight (1) and the other is hinged to the turntable (2); The turntable (2) is externally connected to a turntable support (21), and the counterweight (1) is supported on the turntable support (21) and is detachably connected to the turntable support (21); when the counterweight (1) is detached from the turntable support (21), the counterweight telescopic cylinder (3) drives the counterweight (1) to slide along the turntable support (21) towards or away from the turntable (2); The turntable support (21) is provided with a turntable friction plate (2-1) on the side facing the counterweight, and the counterweight (1) is provided with a counterweight friction plate (1-7) on the side facing the turntable friction plate (2-1). When the counterweight (1) slides, the turntable friction plate (2-1) and the counterweight friction plate (1-7) are in contact. The counterweight (1) is provided with a lubrication pipe (15), and the counterweight friction plate (1-7) is provided with an elongated groove (1-7.3), and an oil passage hole (1-7.2) is provided in the elongated groove; the grease inlet of the lubrication pipe (15) is connected to the oil cup (1-3), and the grease outlet of the lubrication pipe (15) is connected to the oil passage hole (1-7.2); Limiting blocks (1-8) are connected to the counterweight friction plate (1-7). Each limiting block (1-8) is provided on both sides of the turntable support (21) for limiting the sliding movement of the counterweight (1). A first gap is left between the grease outlet of the lubrication pipe (15) and the counterweight friction plate (1-7); the turntable friction plate extends beyond the turntable support (21) and a second gap is left between it and the limiting block (1-8); a third gap is left between the protruding structure of the limiting block (1-8) and the turntable support (21); the length of the elongated groove (1-7.3) is greater than the length of the inner side of the limiting block (1-8), and the excess part is set as an offset gap.

2. The sliding counterweight device according to claim 1, characterized in that, The counterweight (1) is equipped with a counterweight mounting seat (12) and a counterweight threaded seat (16). The counterweight mounting seat (12) is located between the counterweight friction plate (1-7) and the counterweight threaded seat (16). The counterweight friction plate (1-7) is fixedly connected to the counterweight threaded seat (16) by the counterweight friction plate fixing bolt (1-9).

3. The sliding counterweight device according to claim 2, characterized in that, The counterweight (1) is detachably connected to the turntable support (21) by counterweight fixing bolts (1-6). The counterweight fixing bolts (1-6) pass through the turntable support (21), the turntable friction plate (2-1), the counterweight friction plate (1-7), the counterweight mounting seat (12), and are screwed to the counterweight threaded seat (16).

4. The sliding counterweight device according to claim 3, characterized in that, The turntable friction plate (2-1) is provided with elongated holes corresponding to the possible target sliding positions of the counterweight (1); the maximum adjustable gap after the counterweight fixing bolt (1-6) is inserted into the elongated hole is not less than the second gap.

5. A control system for a sliding counterweight device, characterized in that, Includes a controller, a sensor, a control panel, and the sliding counterweight device as described in any one of claims 1 to 4; The sensor (5) is used to collect electrical signals that can reflect the assembly state of the counterweight (1) and the turntable support (21); the assembly state includes disassembly state and locking state; The control panel (6) is used to receive the counterweight sliding mode set by the user, and the counterweight sliding mode includes at least the counterweight sliding direction; The controller (4) is used to determine the assembly state of the counterweight and the turntable support according to the electrical signal. In response to the assembly state being disassembled, the controller drives the counterweight to perform sliding operation according to the counterweight sliding mode set by the counterweight telescopic cylinder (3). In response to the assembly state being locked, the controller controls the control panel (6) to output and display subsequent operation instructions.

6. An excavator, characterized in that, The control system includes the sliding counterweight device as described in any one of claims 1 to 4 or the sliding counterweight device as described in claim 5.

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