Split type counterweight structure with adjustable gravity center

Abstract

The split type balance weight structure comprises a main supporting plate, a balance weight transmission mechanism, a balance weight driving mechanism and a balance weight mechanism, the main supporting plate is fixed to a balance weight frame, and the balance weight transmission mechanism is located between the main supporting plate and an auxiliary supporting plate and comprises an upper rotating seat, a lower rotating seat and a driving column; the transmission mechanism is provided with two groups of coaxial driving rings and driven rings which are connected through an elastic connector, the counterweight driving mechanism consists of two rotary drivers which are respectively connected with the driving rings of the transmission mechanism, and the counterweight mechanism consists of two groups of fan-shaped counterweight plates which are respectively fixed on the side wall of an adapter ring of the transmission mechanism.

Description

Technical Field

[0001] The invention relates to a split counterweight structure with adjustable center of gravity, belonging to the field of counterweight frame stabilization equipment. Background Art

[0002] Heavy construction machinery such as tower cranes and other structures will swing in an undirected manner due to the accelerated swing of the hoisted materials and the long-term or periodic blowing of gusts, which will cause the entire bottom of the construction machinery to swing as well. Although current lifting equipment will place counterweights at the bottom, it is still unable to adapt to the real-time swinging upper structure. Excessive counterweights will also increase the bending moment of local parts of the structure, such as the bottom wheel drive structure connecting frame, affecting the structural strength. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the technical problems in the prior art and provide a split counterweight structure with an adjustable center of gravity.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a split counterweight structure with adjustable center of gravity; a main support plate is arranged on the top of the counterweight frame, and the counterweight structure is fixed on the main support plate, and the counterweight structure includes: The counterweight transmission mechanism comprises an upper rotating seat and a lower rotating seat, the upper rotating seat is fixedly connected to the main support plate, the lower rotating seat is fixedly connected to the bottom of the counterweight frame, and a driving column is rotatably connected between the middle part of the upper rotating seat and the middle part of the lower rotating seat; the counterweight transmission mechanism also comprises a first driving ring and a first driven ring coaxially fixed to the driving column, a first adapter ring is rotatably connected to the driving column, the first adapter ring and the first driven ring are elastically rotatably connected through a first elastic connector, the elastic support axis of the first elastic connector is arc-shaped and concentric with the center of the first adapter ring; the counterweight transmission mechanism also comprises a second driving ring and a second driven ring rotatably connected to the driving column, the second driving ring and the second driven ring are fixed to each other, a second adapter ring is rotatably connected to the driving column, the second adapter ring and the second driven ring are elastically rotatably connected through a second elastic connector, the elastic support axis of the second elastic connector is arc-shaped and concentric with the center of the second adapter ring; The counterweight driving mechanism comprises a first rotating driver and a second rotating driver symmetrically arranged on the main support plate, wherein the output end of the first rotating driver is drivingly connected to the first driving ring, and the output end of the second rotating driver is drivingly connected to the second driving ring; And, a counterweight mechanism, the counterweight mechanism includes two sets of fan-shaped counterweight plates, namely a first counterweight plate and a second counterweight plate, wherein the first counterweight plate is vertically fixed to the side wall of the first adapter ring, and the second counterweight plate is vertically fixed to the side wall of the second adapter ring.

[0005] As a further improvement of the present invention, an upper rotating connecting ring is provided on the upper part of the first driving ring, and the upper rotating connecting ring is rotatably connected to the upper rotating seat. An upper adapter flange ring is concentrically arranged on the inner ring of the upper rotating connecting ring, and the upper adapter flange ring is coaxially fixed to the top of the driving column.

[0006] As a further improvement of the present invention, a lower rotating connecting ring is provided at the bottom of the first driven ring, and the lower rotating connecting ring is rotatably connected to the lower rotating seat. A lower adapter flange ring is concentrically arranged on the inner ring of the lower rotating connecting ring, and the lower adapter flange ring is coaxially fixed to the bottom of the driving column; wherein the second driving ring and the second driven ring are located between the first driving ring and the first driven ring.

[0007] As a further improvement of the present invention, a middle support ring is integrally fixed in the middle part of the driving column, and a supporting protrusion ring is integrally provided on the side wall of the middle support ring; wherein, the inner ring of the second driven ring is rotatably connected to the side wall of the middle support ring through a bearing, and the inner ring of the second adapter ring is provided with a supporting contact ring, and the supporting contact ring and the supporting protrusion ring are in transmission contact with each other through a roller bearing.

[0008] As a further improvement of the present invention, a sliding ring is arranged at the bottom of the middle support ring, and the bottom of the first adapter ring is in sliding contact with the sliding ring.

[0009] As a further improvement of the present invention, a plurality of arc-shaped first main inlay grooves are arranged in an annular array on the surface of the first driven ring, a plurality of arc-shaped first secondary inlay grooves are arranged in an annular array on the surface of the first adapter ring, the first elastic connector includes a plurality of first ring-shaped springs inlaid between the first main inlay groove and the first secondary inlay groove, the upper half of the radial axis of the first ring-shaped spring is located in the first main inlay groove, and the lower half of the radial axis of the first ring-shaped spring is located in the first secondary inlay groove; a plurality of arc-shaped second main inlay grooves are arranged in an annular array on the surface of the second driven ring, a plurality of arc-shaped second secondary inlay grooves are arranged in an annular array on the surface of the second adapter ring, the second elastic connector includes a plurality of second ring-shaped springs inlaid between the second main inlay groove and the second secondary inlay groove, the upper half of the radial axis of the second ring-shaped spring is located in the second main inlay groove, and the lower half of the radial axis of the second ring-shaped spring is located in the second secondary inlay groove.

[0010] As a further improvement of the present invention, a first belt loop is coaxially fixed on the first drive ring, and a second belt loop is coaxially fixed on the second drive ring; the output ends of the first rotary drive and the second rotary drive are respectively connected to the first belt loop and the second belt loop through belts.

[0011] As a further improvement of the present invention, at least two groups of counterweight adjustment grooves are arranged in an array on the first counterweight plate and the second counterweight plate, a fixing screw is arranged through the counterweight adjustment groove, the two ends of the fixing screw are connected to the ends of the counterweight adjustment groove by threads, and a plurality of counterweight adjustment blocks are sleeved in an array on the fixing screw.

[0012] As a further improvement of the present invention, the counterweight adjustment blocks are supported and contacted by nylon support sleeves.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention provides two groups of counterweight plates independently driven by two groups of driving mechanisms in the counterweight frame. Through the variable speed swing of the counterweight plates, not only the counterweight frame is provided with reverse acceleration in the swing direction of the engineering machinery, but also precise counterweight adjustment in different directions can be provided for the engineering machinery.

[0014] 2. Using elastic connection mechanism for buffering can prevent high-speed impact caused by sudden start, stop and reversal of counterweight plate drive mechanism to improve safety; high-speed impact may cause unstable shaking of counterweight frame.

[0015] 3. The driving column is fixed by the first driving ring, which can reduce the load on the surface of the driving column, and the end face flange fixation is stronger than the first driving ring interference fit fixation; the same is true for the first driven ring structure at the bottom.

[0016] 4. The sliding ring can provide axial sliding support for the first adapter ring, thereby improving the rotation stability of the first adapter ring.

[0017] 5. Using coil springs as buffers has a longer service life and is easier to disassemble and assemble than leaf springs and other structures.

[0018] 6. Belt drive is lighter and less expensive than gear drive. The elastic force of the belt itself can also provide a certain driving buffer. Compared with gears, the belt has better impact resistance for rapid reversing.

[0019] 7. The counterweight adjustment slot can be conveniently adjusted according to the default facility counterweight conditions and load indicators in the counterweight frame to ensure sufficient output of reverse driving force. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 is a cross-sectional schematic diagram of a split counterweight structure from a front view perspective; Figure 2 It is a top view of the split counterweight structure; Figure 3 is a schematic diagram of the assembly of the first counterweight plate; Figure 4 is a schematic diagram of the assembly of the second counterweight plate; Figure 5 is a schematic diagram of the actuation states of the first counterweight plate and the second counterweight plate; Figure 6 is a schematic diagram of the connection state of the present invention; Figure 7 is a schematic diagram of the actuation process of the first elastic connector; In the figure: 1, main support plate; 2, first adapter ring; 3, first counterweight plate; 4, second adapter ring; 5, second counterweight plate; 6, counterweight adjustment slot; 7, counterweight adjustment block; 8, fixing screw; 9, nylon support sleeve; 10, motor slot; 11, first rotary drive; 12, transmission belt; 13, second rotary drive; 14, upper rotary seat; 15, lower rotary seat; 16, driving column; 17, first driving ring; 18, upper rotating connecting ring; 19, first driven ring; 20, lower rotating connecting ring; 2 1. First secondary inlay groove; 22. First main inlay groove; 23. Sliding ring; 24. Second coil spring; 25. Second drive ring; 26. First coil spring; 27. Second main inlay groove; 28. Second secondary inlay groove; 29. ​​Middle support ring; 30. Support protrusion ring; 31. Support contact ring; 32. First belt loop; 33. Second belt loop; 34. Engineering vehicle body; 35. Connecting pin; 36. Secondary support plate; 37. Lock hole; 38. Auxiliary support column; 39. Sheet metal; 40. Protective baffle. DETAILED DESCRIPTION

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0023] A split counterweight structure with adjustable center of gravity; comprising: like Figure 1 , Figure 2 and Figure 6 The structure includes a main support plate 1 at the top of the counterweight frame and a secondary support plate 36 at the bottom of the counterweight frame, and the counterweight mechanism is fixed between the main support plate 1 and the secondary support plate 36; the main support plate 1 and the secondary support plate 36 are supported and fixed between their outer sides by auxiliary support columns 38, and the split counterweight structure is supported and placed in the space between the auxiliary support columns; the outer side between the main support plate 1 and the secondary support plate 36 is covered with sheet metal 39 to protect the internal counterweight mechanism, wherein a plurality of lock holes 37 are provided on the secondary support plate 36, and connecting pins 35 corresponding to the lock holes 37 are provided on the counterweight connection position of the engineering vehicle body. During installation, the counterweight frame is fixed by plugging the lock holes 37 into the connecting pins 35.

[0024] Counterweight transmission mechanism, such as Figure 1 The counterweight transmission mechanism includes an upper rotating seat 14 and a lower rotating seat 15 . The upper rotating seat 14 is fixedly connected to the main support plate 1 , and the lower rotating seat 15 is fixedly connected to the bottom auxiliary support plate. The counterweight transmission mechanism mainly includes a driving column 16 .

[0025] It also includes a first driving ring 17 and a first driven ring 19 coaxially fixed to the driving column 16. An upper rotating connecting ring 18 is arranged on the upper part of the first driving ring 17. The upper rotating connecting ring 18 is rotatably connected to the upper rotating seat 14. An upper adapter flange ring is concentrically arranged on the inner circle of the upper rotating connecting ring 18. The upper adapter flange ring is coaxially fixed to the top of the driving column 16. A lower rotating connecting ring 20 is arranged at the bottom of the first driven ring 19. The lower rotating connecting ring 20 is rotatably connected to the lower rotating seat 15. A lower adapter flange ring is concentrically arranged on the inner circle of the lower rotating connecting ring 20. The lower adapter flange ring is coaxially fixed to the bottom of the driving column 16.

[0026] like Figure 1 A first adapter ring 2 is rotatably connected to the driving column 16, and the first adapter ring 2 is elastically rotatably connected to the first driven ring 19 through a first elastic connector. A plurality of arc-shaped first main inlay grooves 22 are arranged in an annular array on the surface of the first driven ring 19, and a plurality of arc-shaped first secondary inlay grooves 21 are arranged in an annular array on the surface of the first adapter ring 2. The first elastic connector includes a plurality of first coil springs 26 inlaid between the first main inlay groove 22 and the first secondary inlay groove 21. The upper half of the radial axis of the first coil spring 26 is located in the first main inlay groove 22, and the lower half of the radial axis of the first coil spring 26 is located in the first secondary inlay groove 21.

[0027] When the first elastic connector is actuated, Figure 7 When the first adapter ring 2 and the first driven ring 19 rotate relative to each other, the first secondary inlay groove 21 and the first main inlay groove 22 move relative to each other, and the end of the first secondary inlay groove 21 facing the moving direction will contact with one end of the first coil spring 26, and the end of the first main inlay groove 22 facing the opposite moving direction will contact with the other end of the first coil spring 26, thereby compressing the first coil spring 26. Through the elastic support of the first coil springs 26 during the compression process, elastic buffering is achieved during the relative rotation of the first adapter ring 2 and the first driven ring 19, and the actuation of the second elastic connector is the same as the actuation state of the first elastic connector.

[0028] like Figure 1The counterweight transmission mechanism also includes a second driving ring 25 and a second driven ring rotatably connected to the driving column 16, wherein the second driving ring 25 and the second driven ring are located between the first driving ring 17 and the first driven ring 19, the second driving ring 25 and the second driven ring are fixed to each other as a whole, and a second adapter ring 4 is rotatably connected to the driving column 16, and a middle support ring 29 is integrally fixed in the middle of the driving column 16, and a support protrusion ring 30 is integrally provided on the side wall of the middle support ring 29, wherein the inner ring of the second driven ring is rotatably connected to the side wall of the middle support ring 29 through a bearing, and the inner ring of the second adapter ring 4 is provided with a support contact ring 31, and the support contact ring 31 and the support protrusion ring 30 are in contact through roller bearing transmission; a sliding ring 23 is provided at the bottom of the middle support ring 29, and the bottom of the first adapter ring 2 is in sliding contact with the sliding ring 23.

[0029] like Figure 1 The second adapter ring 4 is elastically rotatably connected to the second driven ring through a second elastic connector. A plurality of arc-shaped second main inlay grooves 27 are arranged in a circular array on the surface of the second driven ring, and a plurality of arc-shaped second secondary inlay grooves 28 are arranged in a circular array on the surface of the first adapter ring 2. The second elastic connector includes a plurality of second coil springs 24 inlaid between the second main inlay grooves 27 and the second secondary inlay grooves 28. The upper half of the radial axis of the second coil spring 24 is located in the second main inlay groove 27, and the lower half of the radial axis of the second coil spring 24 is located in the second secondary inlay groove 28.

[0030] like Figure 1 and Figure 2 , counterweight drive mechanism, the counterweight drive mechanism includes a first rotary driver 11 and a second rotary driver 13 symmetrically arranged on the main support plate 1, and a protective baffle 40 for protecting the rotating machinery is arranged at the position of the main support plate 1 corresponding to the first rotary driver 11 and the second rotary driver 13, and the protective baffle and the main support plate 1 are an integral structure; the first rotary driver 11 and the second rotary driver 13 are both motors, and two groups of symmetrical motor slots 10 are arranged on the main support plate 1, and the motors are installed in the motor slots 10, a first belt loop 32 is coaxially fixed on the first drive ring 17, and a second belt loop 33 is coaxially fixed on the second drive ring 25; the output ends of the first rotary driver 11 and the second rotary driver 13 are respectively connected to the first belt loop 32 and the second belt loop 33 through belt transmission; the first rotary driver 11 and the second rotary driver 13 drive the transmission belt 12 to drive the first belt loop 32 and the second belt loop 33 to rotate, and the first belt loop 32 and the second belt loop 33 can synchronously drive the first driven ring 19 and the second driven ring to rotate.

[0031] like Figure 2 The counterweight mechanism includes two sets of fan-shaped counterweight plates, such as Figure 3and Figure 4 , respectively, the first counterweight plate 3 and the second counterweight plate 5, wherein the first counterweight plate 3 is fixed to the side wall of the first adapter ring 2, and the second counterweight plate 5 is fixed to the side wall of the second adapter ring 4; at least two groups of counterweight adjustment grooves 6 are arranged in an array on the first counterweight plate 3 and the second counterweight plate 5, and a fixing screw 8 is arranged through the counterweight adjustment groove 6, and the two ends of the fixing screw 8 are fixed to the first counterweight plate 3 and the second counterweight plate 5, and a plurality of counterweight adjustment blocks 7 are array-sleeved on the fixing screw 8, and nylon support sleeves 9 are arranged between the counterweight adjustment blocks 7, and the nylon support sleeves 9 are used to prevent the generation of abnormal noise between the counterweight adjustment blocks 7.

[0032] like Figure 2 In the default state of the mechanism, the symmetry axis of the first counterweight plate 3 and the second counterweight plate 5 is perpendicular to the symmetry axis of the first rotary drive 11 and the second rotary drive 13, and the first counterweight plate 3 and the second counterweight plate 5 are unfolded to the maximum angle with each other; in order to compensate for the bending moment of the first counterweight plate 3 and the second counterweight plate 5 in the height gradient direction, the weight of the first counterweight plate 3 and the second counterweight plate 5 is adaptively adjusted by the counterweight adjustment block 7; subsequently, when the engineering machinery is driven to swing due to wind pressure and the swing of the counterweight-mounted cargo, the two sets of counterweight plates can be driven to swing, thereby suppressing the swinging state, and the first counterweight plate and the second counterweight plate are accelerated in the opposite direction of the swinging direction through the acceleration drive of the counterweight, so as to mechanizedly consume the kinetic energy of the swing, and the rotation angle of the first counterweight plate 3 and the second counterweight plate 5 can be adjusted according to the rotation angle of the first counterweight plate 3 and the second counterweight plate 5. The torque output is controlled by the degree. As the first counterweight plate 3 and the second counterweight plate 5 rotate, by default, the main force arms of the first counterweight plate 3 and the second counterweight plate 5 are attached to the rotating shaft of the counterweight frame. During rotation, the force arms can be controlled by controlling the swing angles of the first counterweight plate 3 and the second counterweight plate 5 to reversely compensate for the swing of the mounted cargo and the swing of the engineering machinery caused by wind pressure. When the engineering machinery is subjected to uncertain wind pressure and swings, the first counterweight plate 3 and the second counterweight plate 5 can be swung at variable speeds by the motor. During the variable speed swing, the first counterweight plate 3 and the second counterweight plate 5 can generate acceleration in the circumferential direction, and part of the tangential acceleration will be allocated to the radial direction of the counterweight frame, thereby providing reverse acceleration for the left and right swing of the counterweight frame. By repeatedly swinging the first counterweight plate 3 and the second counterweight plate 5, the swing impact of constant speed and quantitative wind pressure on the engineering machinery can be simulated. Figure 5 At the same time, for a slight weight offset swing, the second counterweight plate 5 on one side of the mechanism can be used to make a certain angle swing correction. However, in order to compensate for the deviation of the center of gravity from the direction perpendicular to the axis of the rotating shaft of the counterweight frame to the direction parallel to the axis of the rotating shaft after the second counterweight plate 5 swings, the first counterweight plate 3 on the other side can be swung in the opposite direction at a small angle to balance the uneven load in the axis direction of the rotating shaft.

[0033] The second coil spring 24 and the first coil spring 26 can prevent rigid transmission impact between the first adapter ring 2 and the first driven ring 19, and between the second adapter ring 4 and the second driven ring. During rapid start-up or change of direction, the driving torque generated by the first driven ring 19 and the second driven ring will first be applied to the first coil spring 26 and the second coil spring 24, so that the first coil spring 26 and the second coil spring 24 are compressed, and then the first coil spring 26 and the second coil spring 24 are relaxed, thereby generating a driving torque on the first adapter ring 2 and the second adapter ring 4.

[0034] With the above-mentioned ideal embodiments of the present invention as inspiration, through the above-mentioned description content, relevant personnel can make various changes and modifications without departing from the scope of the technical idea of ​​the present invention.

Claims

1. A split counterweight structure with adjustable center of gravity; a main support plate (1) is arranged on the top of the counterweight frame, and the counterweight structure is fixed on the main support plate (1), wherein the counterweight The structure includes: The counterweight transmission mechanism comprises an upper rotating seat (14) and a lower rotating seat (15), wherein the upper rotating seat (14) is fixedly connected to the main support plate (1), and the lower rotating seat (15) is fixed to the bottom of the counterweight frame, and a driving column (16) is rotatably connected between the middle of the upper rotating seat (14) and the middle of the lower rotating seat (15); the counterweight transmission mechanism also comprises a first driving ring (17) and a first driven ring (19) coaxially fixed to the driving column (16), and a first adapter ring (2) is rotatably connected to the driving column (16), and the first adapter ring (2) and the first driven ring (19) are connected to each other. The first adapter ring (2) and the second adapter ring (4) are rotatably connected to each other via a first elastic connector, wherein the elastic support axis of the first elastic connector is arc-shaped and concentric with the center of the circle of the first adapter ring (2); the counterweight transmission mechanism also includes a second drive ring (25) and a second driven ring rotatably connected to the drive column (16), the second drive ring (25) and the second driven ring are fixed to each other, a second adapter ring (4) is rotatably connected to the drive column (16), the second adapter ring (4) and the second driven ring are rotatably connected via a second elastic connector, and the elastic support axis of the second elastic connector is arc-shaped and concentric with the center of the circle of the second adapter ring (4); A counterweight drive mechanism, the counterweight drive mechanism comprising a first rotary drive (11) and a second rotary drive (13) symmetrically arranged on the main support plate (1), the output end of the first rotary drive (11) being transmission-connected to a first drive ring (17), and the output end of the second rotary drive (13) being transmission-connected to a second drive ring (25); And, a counterweight mechanism, the counterweight mechanism comprises two sets of fan-shaped counterweight plates, namely a first counterweight plate (3) and a second counterweight plate (5), wherein the first counterweight plate (3) is fixed to the side wall of the first adapter ring (2), and the second counterweight plate (5) is fixed to the side wall of the second adapter ring (4).

2. A split counterweight structure with adjustable center of gravity as claimed in claim 1, characterized in that: An upper rotating connection ring (18) is provided on the upper part of the first driving ring (17). The upper rotating connection ring (18) is rotatably connected to the upper rotating seat (14). An upper transfer flange ring is coaxially arranged on the inner ring of the upper rotating connection ring (18). The upper transfer flange ring is coaxially fixed to the top of the driving column (16).

3. A split counterweight structure with adjustable center of gravity as claimed in claim 2, characterized in that: A lower rotating connection ring (20) is provided at the bottom of the first driven ring (19), and the lower rotating connection ring (20) is rotatably connected to the lower rotating seat (15). A lower transfer flange ring is coaxially arranged on the inner ring of the lower rotating connection ring (20), and the lower transfer flange ring is coaxially fixed to the bottom of the driving column (16); wherein the second driving ring (25) and the second driven ring are located between the first driving ring (17) and the first driven ring (19).

4. The split counterweight structure with adjustable center of gravity as claimed in claim 3, characterized in that: A middle support ring (29) is integrally fixed in the middle of the driving column (16), and a support protrusion ring (30) is integrally provided on the side wall of the middle support ring (29); wherein the inner ring of the second driven ring is rotatably connected to the side wall of the middle support ring (29) via a bearing, and the inner ring of the second adapter ring (4) is provided with a support contact ring (31), and the support contact ring (31) and the support protrusion ring (30) are in transmission contact via a roller bearing.

5. The split counterweight structure with adjustable center of gravity as claimed in claim 4, characterized in that: A sliding ring (23) is arranged at the bottom of the middle support ring (29), and the bottom of the first adapter ring (2) is in sliding contact with the sliding ring (23).

6. A split counterweight structure with adjustable center of gravity as claimed in claim 1, characterized in that: A plurality of arcuate first main inlay grooves (22) are arranged in an annular array on the surface of the first driven ring (19), a plurality of arcuate first auxiliary inlay grooves (21) are arranged in an annular array on the surface of the first adapter ring (2), the first elastic connector comprising a plurality of ring springs inlaid between the first main inlay groove (22) and the first auxiliary inlay groove (21), the upper half of the radial axis of the first ring spring (26) being located in the first main inlay groove (22), and the lower half of the radial axis of the first ring spring (26) being located in the first auxiliary inlay groove (21); A plurality of arc-shaped second main inlay grooves (27) are arranged in an annular array on the surface of the second driven ring, a plurality of arc-shaped second auxiliary inlay grooves (28) are arranged in an annular array on the surface of the first adapter ring (2), and the second elastic connector comprises a plurality of second ring-shaped springs (24) inlaid between the second main inlay grooves (27) and the second auxiliary inlay grooves (28), the upper half of the radial axis of the second ring-shaped spring (24) is located in the second main inlay groove (27), and the lower half of the radial axis of the second ring-shaped spring (24) is located in the second auxiliary inlay groove (28).

7. The split counterweight structure with adjustable center of gravity as claimed in claim 1, characterized in that: A first belt loop (32) is coaxially fixed on the first drive ring (17), and a second belt loop (33) is coaxially fixed on the second drive ring (25); the output ends of the first rotary drive (11) and the second rotary drive (13) are respectively connected to the first belt loop (32) and the second belt loop (33) through belt transmission.

8. The split-type counterweight structure with adjustable center of gravity as claimed in claim 1, characterized in that: At least two groups of counterweight adjustment grooves (6) are arranged in an array on the first counterweight plate (3) and the second counterweight plate (5), and a fixing screw (8) is arranged through the counterweight adjustment groove (6). The two ends of the fixing screw (8) are fixed to the first counterweight plate (3) and the second counterweight plate (5), and a plurality of counterweight adjustment blocks (7) are sleeved in an array on the fixing screw (8).

9. A split counterweight structure with adjustable center of gravity as claimed in claim 8, characterized in that: The counterweight adjustment blocks (7) are supported and contacted with each other through nylon support sleeves (9).

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