A variable rigidity swing frame

Abstract

The present invention relates to the technical field of dynamic balancing test equipment, and more particularly to a variable rigidity pendulum frame, comprising a frame, a bearing seat provided on the frame, and multiple rigidity adjustment mechanisms provided below the bearing seat, each of the rigidity adjustment mechanisms comprising a connecting assembly for connecting the frame and the bearing seat and a first adjustment assembly for adjusting the rigidity of the connection between the connecting assembly and the bearing seat, the connecting assembly being connected between the frame and the bearing seat, and the first adjustment assembly being connected to the connecting assembly. The present application has the effect of adjusting the rigidity of the pendulum frame and improving the accuracy of dynamic balancing measurements.

Description

Technical Field

[0001] The present invention relates to the technical field of dynamic balance testing equipment, in particular to a variable rigidity pendulum frame. Background Art

[0002] During the rotor manufacturing process, it is generally necessary to use a balancing machine to perform ultra-high speed dynamic balancing tests on the rotor.

[0003] During ultra-high-speed dynamic balancing tests, the rotor's ends must be placed within the bearing blocks of the balancing machine's pendulum frame and rotated at high speed. Due to tolerances and imperfections in the rotor manufacturing process, different rotors experience varying radial stresses during high-speed rotation. However, existing pendulum frames typically have fixed rigidity. Therefore, when subjected to varying radial stresses, the pendulum frame and bearing blocks are susceptible to vibration, reducing the accuracy of dynamic balancing measurements. Summary of the Invention

[0004] In order to adjust the rigidity of the pendulum frame and improve the accuracy of dynamic balance measurement, the present application provides a variable rigidity pendulum frame.

[0005] This application provides a variable rigidity swing frame, which adopts the following technical solution:

[0006] A variable rigidity swing frame includes a frame, a bearing seat is provided on the frame, and multiple sets of rigidity adjustment mechanisms are provided below the bearing seat. Each of the rigidity adjustment mechanisms includes a connecting component for connecting the frame and the bearing seat and a first adjustment component for adjusting the rigidity of the connection between the connecting component and the bearing seat. The connecting component is connected between the frame and the bearing seat, and the first adjustment component is connected to the connecting component.

[0007] By adopting the above technical solution, the connecting assembly can securely connect the frame and the bearing seat, helping to improve the bearing seat's ability to withstand radial stress, helping to reduce the bearing seat's vibration, and improving the accuracy of balance measurements. The first adjustment assembly can adjust the rigidity of the connection between the connecting assembly and the bearing seat, helping to further reduce the vibration of the bearing seat and the frame, thereby reducing the impact of vibration on dynamic balance measurement results and improving the accuracy of dynamic balance measurements.

[0008] In a specific possible implementation scheme, the connecting assembly includes a connecting plate, a connecting rod and a plurality of steel sheets, the connecting plate is arranged on the frame, the connecting rod and one end of the plurality of steel sheets are arranged on the connecting plate, the connecting rod and one end of the plurality of steel sheets away from the connecting plate are connected to the bearing seat, and the plurality of steel sheets are spaced apart and arranged on both sides of the connecting rod.

[0009] By adopting the above technical solution, the frame and the bearing seat can be rigidly connected through connecting rods and multiple steel sheets, which helps to improve the bearing capacity of the bearing seat to the radial stress generated when the rotor rotates, thereby reducing the vibration of the bearing seat and improving the accuracy of balance measurement.

[0010] In a specific feasible implementation scheme, the first adjustment component includes a first clamping block, a second clamping block, a piston and multiple piston rods, the first clamping block and the second clamping block are respectively arranged on the steel sheets on both sides of the connecting rod, the first clamping block and the second clamping block are arranged at the connection between the steel sheet and the bearing seat, an active cavity is provided in the first clamping block, the piston is provided in the active cavity, one end of multiple piston rods is provided on the second clamping block, and one end of multiple piston rods away from the second clamping block is connected to the piston, the first clamping block is provided with a liquid inlet interface and a liquid outlet interface, and the liquid inlet interface and the liquid outlet interface are both connected to the active cavity.

[0011] By adopting the above technical solution, part of the hydraulic oil in the movable chamber is extracted using the liquid outlet interface, which can cause the piston to move in the direction away from the second clamping block, thereby driving the second clamping block to clamp the end of the steel sheet through multiple piston rods, which helps to increase the rigidity of the connection between the bearing seat and the steel sheet, and can further slow down the vibration of the bearing seat and the frame, thereby helping to reduce the impact of vibration on the balance measurement results and improving the accuracy of the balance measurement of the balancing maneuver.

[0012] In a specific possible implementation scheme, a clamping plate is provided on the side walls of the first clamping block and the second clamping block, each of the clamping plates is pressed against one of the steel sheets, and a plurality of second adjustment components for adjusting the rigidity of the middle part of the steel sheet are provided on the clamping plate. One end of the clamping plate away from the first clamping block and the second clamping block is connected to the connecting plate, and a locking component for locking the clamping plate and the steel sheet is provided on the connecting plate.

[0013] By adopting the above technical solution, when the first clamping block and the second clamping block clamp the ends of the steel sheet, they can drive the abutting plate to abut other parts of the steel sheet. The second adjustment component can cooperate with the abutting plate to adjust the rigidity of the middle part of the steel sheet, which can further reduce the vibration of the bearing seat and the frame, thereby helping to reduce the impact of vibration on the balance measurement results and improving the accuracy of the balance measurement of the balancing maneuver. The locking component can lock the abutting plate and the end of the steel sheet near the connecting plate, which helps to increase the rigidity of the connection between the steel sheet and the abutting plate and the connecting plate, and can further reduce the vibration of the bearing seat and the frame, thereby helping to reduce the impact of vibration on the balance measurement results and improving the accuracy of the balance measurement of the balancing maneuver.

[0014] In a specific feasible implementation scheme, each group of the second adjustment components includes an adjusting bolt, an adjusting nut, a support spring and a plurality of support plates. The adjusting bolt passes through the steel plate and the clamping plate. The adjusting nut is threadedly connected to the adjusting bolt. The support spring and the plurality of support plates are both mounted on the adjusting bolt. The plurality of support plates are connected to both ends of the support spring.

[0015] By adopting the above technical solution, when the first clamping block and the second clamping block clamp the ends of the two steel sheets connected to the bearing seat, tightening the adjusting nut can cause the adjusting bolt and the adjusting nut to press against the middle portions of the two clamping plates, thereby tightening the middle portions of the two steel sheets. At the same time, under the elastic force of the supporting spring, the multiple supporting plates support the middle portions of the two steel sheets. The coordinated action of the adjusting bolt, adjusting nut, supporting spring, and multiple supporting plates can enhance the rigidity of the middle portions of the two steel sheets, thereby reducing the vibration of the bearing seat and the frame, helping to reduce the impact of vibration on the balance measurement results and improving the accuracy of the balance measurement of the balancing machine.

[0016] In a specific feasible implementation scheme, each group of the second adjustment components includes a hollow bolt, a locking nut, a support airbag and an inflation joint, the hollow bolt passes through the steel sheet and the clamping plate, the locking nut is threadedly connected to the hollow bolt, the support airbag is arranged on the side wall of the hollow bolt and is connected to the hollow bolt, the support airbag is located between multiple steel sheets, and the inflation joint is connected to the hollow bolt.

[0017] By adopting the above technical solution, when the first clamping block and the second clamping block clamp the ends of the two steel sheets connected to the bearing seat, tightening the locking nut can enable the hollow bolt and the locking nut to press against the middle parts of the two clamping plates, thereby tightening the middle parts of the two steel sheets. At the same time, by inflating the supporting airbag through the inflation joint, the supporting airbag can support the middle parts of the two steel sheets. With the coordinated action of the hollow bolt, the locking nut and the supporting airbag, the rigidity of the middle parts of the two steel sheets can be enhanced, thereby reducing the vibration of the bearing seat and the frame, helping to reduce the impact of vibration on the balance measurement results and improving the accuracy of the balance measurement of the balancing maneuver.

[0018] In a specific feasible implementation scheme, the locking assembly includes a first locking block, a second locking block and a magnetic member, the first locking block and the second locking block are both arranged on the connecting plate, the first locking block is provided with a plurality of dovetail blocks, the second locking block is provided with a plurality of dovetail grooves for clamping the plurality of dovetail blocks, and the magnetic member is arranged on the surface of the first locking block and the second locking block facing the connecting plate.

[0019] By adopting the above technical solution, the magnetic part can attract each other with the connecting plate, thereby improving the stability of the first locking block and the second locking block placed on the connecting plate; the dovetail block and the dovetail groove can be engaged with each other, thereby improving the firmness of the connection between the first locking block and the second locking block, helping to improve the locking effect of the clamping plate and the steel sheet, thereby helping to increase the rigidity of the connection between the steel sheet and the clamping plate and the connecting plate, and can further slow down the vibration of the support seat and the frame, thereby helping to reduce the impact of vibration on the balance measurement results, and improving the accuracy of the balance measurement of the balance maneuver.

[0020] In a specific feasible implementation scheme, an anti-loosening groove is provided on the clamping plate adjacent to the head of the adjusting bolt, the head of the adjusting bolt is arranged in the anti-loosening groove, and an anti-loosening gasket is provided on the adjusting bolt, and the anti-loosening gasket is arranged between the adjusting nut and the clamping plate adjacent to the adjusting nut.

[0021] By adopting the above technical solution, the head of the adjusting bolt is placed in the anti-loosening groove, which can improve the tightness of the adjusting bolt; the setting of the anti-loosening gasket can prevent the loosening of the adjusting nut, thereby improving the tightening effect of the adjusting bolt and adjusting nut on the clamping plate and steel sheet.

[0022] In a specific possible implementation manner, the frame is provided with a plurality of supporting members for elastically supporting the bearing seat, and one end of each supporting member away from the frame is connected to the bearing seat.

[0023] By adopting the above technical solution, the support member can elastically support the bearing seat and buffer the vibration transmitted by the bearing seat, thereby slowing down the vibration of the frame, helping to reduce the impact of vibration on the balance measurement results and improving the accuracy of the balance measurement of the balance maneuver.

[0024] In a specific feasible implementation scheme, each of the supporting members includes a limiting sleeve, a supporting spring and two supporting rods, one of the supporting rods is arranged on the frame, and the other supporting rod is arranged on the bearing seat, the two supporting rods are arranged on the same straight line, the limiting sleeve is connected to the end of the two supporting rods that are close to each other, and the supporting spring is arranged in the movable sleeve and connected to the two supporting rods.

[0025] By adopting the above technical solution, when the end of the rotor rotates in the bearing seat, the bearing seat will vibrate. When the vibration is transmitted to the support rod, the support rod will compress the support spring, and the support spring will produce elastic deformation, thereby absorbing vibration and buffering, thereby slowing down the vibration of the frame, helping to reduce the impact of vibration on the balance measurement results, and improving the accuracy of the balance measurement of the balancing maneuver.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The connection assembly provides a rigid connection between the frame and the bearing seat, thereby improving the bearing seat's ability to withstand radial stress, helping to mitigate vibration of the bearing seat and improving the accuracy of balance measurements. The first adjustment assembly enhances the rigidity of the connection between the connection assembly and the bearing seat, further improving the bearing seat's ability to withstand radial stress, thereby further mitigating vibration of the bearing seat and the frame and further improving the accuracy of balance measurements.

[0028] 2. The provision of the second adjustment component can enhance the rigidity of the middle portion of the steel sheet, thereby helping to further mitigate the vibration of the bearing seat and the frame, reducing the impact of vibration on the balance measurement results, and improving the accuracy of the balance measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0030] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0031] Figure 3 It is a schematic diagram showing the specific structure of the rigidity adjustment mechanism in Example 1 of the present application.

[0032] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0033] Figure 5 It is a schematic diagram showing the specific structure of the support member in Example 1 of the present application.

[0034] Figure 6 It is a schematic diagram showing the specific structure of the second adjustment component in Example 2 of the present application.

[0035] Explanation of reference numerals: 1. frame; 2. bearing seat; 3. rigidity adjustment mechanism; 31. connecting assembly; 311. connecting plate; 312. connecting rod; 313. steel sheet; 32. first adjustment assembly; 321. first clamping block; 322. second clamping block; 323. piston; 324. piston rod; 4. movable chamber; 5. abutting plate; 6. second adjustment assembly; 61. adjusting bolt; 62. adjusting nut; 63. supporting spring; 64. Support plate; 65. Hollow bolt; 66. Locking nut; 67. Support airbag; 68. Inflating connector; 7. Locking assembly; 71. First locking block; 72. Second locking block; 73. Magnetic member; 8. Liquid inlet interface; 9. Liquid outlet interface; 10. Dovetail block; 11. Dovetail groove; 12. Anti-loosening groove; 13. Anti-loosening gasket; 14. Support member; 141. Limit sleeve; 142. Support spring; 143. Support rod. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-6 This application is described in further detail.

[0037] Example 1:

[0038] The present application discloses a variable rigidity swing frame, referring to Figure 1 , including a frame 1, on which a bearing seat 2 for mounting a rotor is fixedly mounted, and two sets of rigidity adjustment mechanisms 3 are arranged below the bearing seat 2, and the two sets of rigidity adjustment mechanisms 3 are symmetrically arranged along the axis of the bearing seat 2 in the vertical direction.

[0039] Reference Figure 1 and Figure 2 Each set of rigidity adjustment mechanisms 3 includes a connecting assembly 31, which includes a connecting plate 311, a connecting rod 312, and two steel plates 313. The connecting plate 311 is fixedly mounted on the frame 1. One end of the connecting rod 312 and the two steel plates 313 are fixedly connected to the connecting plate 311. The ends of the connecting rod 312 and the two steel plates 313 away from the connecting plate 311 are fixedly connected to the bottom of the bearing seat 2. The two steel plates 313 are symmetrically arranged along the axis of the connecting rod 312. When the rotor rotates on the bearing seat 2, the connecting rod 312 and the two steel plates rigidly connect the frame 1 and the bearing seat 2, which helps to improve the bearing capacity of the bearing seat 2 for the radial stress generated during the rotation of the rotor, thereby helping to reduce the vibration of the bearing seat 2 itself, minimize the impact of vibration on the accuracy of balance measurement, and help improve the accuracy of balance measurement.

[0040] Reference Figure 2 and Figure 3When the cam 32 is in the unlock state, the cam 32 is in the unlock state, and the lock 312 is unlocked, so the cam 322 is unlocked and the lock 312 is unlocked. By extracting the hydraulic oil in the movable chamber 4 through the liquid outlet interface 9, the piston 323 can be moved in the direction away from the second clamping block 322, thereby driving the movement of the second clamping block 322 through the piston rod 323, so that the first clamping block 321 and the second clamping block 322 can clamp the connection between the two steel sheets 313 and the supporting seat 2, increasing the rigidity of the connection, helping to further reduce the vibration of the supporting seat 2 and the frame 1, and further improving the accuracy of dynamic balance measurement.

[0041] Reference Figure 2 and Figure 3 The side walls of the first clamping block 321 and the second clamping block 322 are both fixedly connected to a clamping plate 5. The end of each clamping plate 5 away from the bearing seat 2 is fixedly connected to the connecting plate 311. Each clamping plate 5 is tightly abutted against a steel sheet 313. A locking assembly 7 is provided on the connecting plate 311. The locking assembly 7 includes a first locking block 71, a second locking block 72 and a magnetic member 73. The first locking block 71 and the second locking block 72 are both fixedly placed on the connecting plate 311. A plurality of dovetail blocks 10 are integrally formed on the side wall of the first locking block 71 facing the second locking block 72. A plurality of dovetail grooves 11 are formed on the side wall of the second locking block 72 facing the first locking block 71. The first locking block 71 and the second locking block 72 are clamped together by the dovetail blocks 10 and the dovetail grooves 11. The magnetic member 73 is fixedly mounted on the surface of the first locking block 71 and the second locking block 72 facing the connecting plate 311. In this embodiment, the magnetic member 73 is a magnet. The first locking block 71 and the second locking block 72 are respectively placed on the connecting plate 311 to lock the ends of the abutting plate 5 and the steel sheet 313, so that the multiple dovetail blocks 10 are engaged in the multiple dovetail grooves 11. This helps to improve the firmness of the connection between the first locking block 71 and the second locking block 72, thereby improving the locking effect of the abutting plate 5 and the steel sheet 313, and further increasing the rigidity of the connection between the steel sheet 313, the abutting plate 5 and the connecting plate 311, helping to further reduce the vibration of the support seat 2 and the frame 1, and improving the accuracy of dynamic balance measurement.

[0042] Reference Figure 2 and Figure 4 The abutment plate 5 is provided with multiple sets of second adjustment assemblies 6, each of which includes an adjustment bolt 61, an adjustment nut 62, a support spring 63, and two support pieces 64. The adjustment bolt 61 extends through and connects the steel sheet 313 and the abutment plate 5. The abutment plate 5, which is fixedly connected to the first locking block 71, is provided with multiple anti-loosening grooves 12. The heads of the adjustment bolts 61 are placed in the anti-loosening grooves 12, which help improve the tightness of the connection between the adjustment bolts 61 and the abutment plate 5. The adjustment nut 62 is threadedly connected to the tail of the adjustment bolt 61. The adjustment bolt 61 is provided with an anti-loosening washer 13. The anti-loosening washer 13 is disposed between the adjustment nut 62 and the abutment plate 5 to prevent the adjustment nut 62 from loosening, thereby improving the firmness of the threaded connection between the adjustment nut 62 and the adjustment bolt 61. The support spring 63 is sleeved on the adjustment bolt 61 and located between the two steel sheets 313. The two support pieces 64 are fixedly connected to the ends of the support spring 63 and sleeved on the adjustment bolt 61. When the abutting plate 5 abuts the steel sheet 313, the adjusting nut 62 is tightened so that the adjusting nut 62 and the head of the adjusting bolt 61 press against the middle portion of the abutting plate 5, thereby pressing against the middle portion of the steel sheet 313. When the adjusting nut 62 and the adjusting bolt 61 press against the middle portion of the steel sheet 313, the two supporting plates 64 support the middle portion of the steel sheet 313 under the elastic force of the supporting spring 63. When the steel sheet 313 is simultaneously tightened and supported, the rigidity of the middle portion of the steel sheet 313 is enhanced, which helps to further reduce the vibration of the bearing seat 2 and the frame 1, and further improves the accuracy of the dynamic balance measurement.

[0043] Reference Figure 1 and Figure 5 Two supporting members 14 are symmetrically fixed on both sides of each connecting rod 312 on the frame 1. The end of each supporting member 14 away from the frame 1 is fixedly connected to the outer wall of the bearing seat 2. Each supporting member 14 includes a limiting sleeve 141, a supporting spring 142, and two coaxially arranged supporting rods 143. One supporting rod 143 is fixedly connected to the frame 1, and the other supporting rod 143 is fixedly connected to the bearing seat 2. The limiting sleeve 141 is sleeved on the outside of the adjacent ends of the two supporting rods 143. The two ends of the supporting spring 142 are fixedly connected to the adjacent ends of the two supporting rods 143 and are located inside the limiting sleeve 141. When the rotor rotates in the bearing seat 2, the supporting spring 142 can absorb and buffer the vibration transmitted by the supporting rod 143, which helps to slow down the vibration of the frame 1, thereby reducing the impact of vibration on the balance measurement results and improving the accuracy of the balance measurement of the balancing maneuver.

[0044] The implementation principle of the embodiment of the present application is as follows: when the rotor rotates on the bearing seat 2, the connecting rod 312 and the two steel plates rigidly connect the frame 1 and the bearing seat 2. The hydraulic oil in the movable chamber 4 is extracted through the liquid outlet interface 9, so that the piston 323 moves in the direction away from the second clamping block 322, thereby driving the second clamping block 322 to move through the piston 323 rod, so that the first clamping block 321 and the second clamping block 322 can clamp the connection between the two steel plates 313 and the bearing seat 2, thereby increasing the rigidity of the connection, helping to reduce the vibration of the bearing seat 2 and the frame 1, and improving the accuracy of dynamic balance measurement. By locking the ends of the abutting plate 5 and the steel plate 313 through the first locking block 71 and the second locking block 72, the rigidity of the connection between the steel plate 313 and the abutting plate 5 and the connecting plate 311 can be increased, which helps to further reduce the vibration of the bearing seat 2 and the frame 1 and improve the accuracy of dynamic balance measurement. When the abutting plate 5 abuts the steel sheet 313, the adjusting nut 62 is tightened so that the adjusting nut 62 and the head of the adjusting bolt 61 press against the middle portion of the abutting plate 5, thereby pressing against the middle portion of the steel sheet 313. When the adjusting nut 62 and the adjusting bolt 61 press against the middle portion of the steel sheet 313, the two supporting plates 64 support the middle portion of the steel sheet 313 under the elastic force of the supporting spring 63. When the steel sheet 313 is simultaneously tightened and supported, the rigidity of the middle portion of the steel sheet 313 is enhanced, which helps to further reduce the vibration of the bearing seat 2 and the frame 1, and further improves the accuracy of the dynamic balance measurement.

[0045] Example 2:

[0046] Reference Figure 6 The embodiment of the present application differs from the first embodiment in that each set of second adjustment components 6 includes a hollow bolt 65, a locking nut 66, a supporting airbag 67, and an inflation connector 68. The hollow bolt 65 is connected through the steel sheet 313 and the abutting plate 5. The locking nut 66 is threadedly connected to the hollow bolt 65. The supporting airbag 67 is fixedly connected to the side wall of the hollow bolt 65 and communicates with the interior of the hollow bolt 65. The supporting airbag 67 is arranged between the two steel sheets 313. The inflation connector 68 communicates with the interior of the hollow bolt 65. When the abutting plate 5 is pressed against the steel sheet 313, the locking nut 66 is tightened so that the locking nut 66 and the head of the hollow bolt 65 press against the middle portion of the abutting plate 5, thereby pressing against the middle portion of the steel sheet 313. When the locking nut 66 and the head of the hollow bolt 65 press the middle part of the steel sheet 313, air is inflated into the supporting airbag 67 through the inflation joint 68, so that the supporting airbag 67 supports the middle parts of the two steel sheets 313. When the steel sheet 313 is tightened and supported at the same time, it helps to enhance the rigidity of the middle part of the steel sheet 313, helps to further slow down the vibration of the bearing seat 2 and the frame 1, and further improves the accuracy of dynamic balance measurement.

[0047] The working principle of the embodiment of the present application is as follows: when the abutting plate 5 abuts against the steel sheet 313, tightening the adjusting nut 62 can cause the adjusting nut 62 and the head of the adjusting bolt 61 to press against the middle portion of the abutting plate 5, thereby causing the abutting plate 5 to press against the middle portion of the steel sheet 313. When the middle portions of the two steel sheets 313 are pressed against each other, the two supporting plates 64, under the elastic force of the supporting spring 63, support the middle portion of the steel sheet 313. The steel sheet 313 is simultaneously subjected to the tightening and supporting effects in opposite directions, which helps to enhance the rigidity of the middle portion of the steel sheet 313, further reducing the vibration of the bearing seat 2 and the frame 1, and further improving the accuracy of the dynamic balance measurement.

[0048] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A variable rigidity swing frame, comprising a frame (1), wherein a bearing seat (2) is provided on the frame (1), and characterized in that: A plurality of rigidity adjustment mechanisms (3) are provided below the bearing seat (2), each rigidity adjustment mechanism (3) comprising a connecting component (31) for connecting the frame (1) and the bearing seat (2) and a first adjustment component (32) for adjusting the rigidity of the connection between the connecting component (31) and the bearing seat (2), the connecting component (31) being connected between the frame (1) and the bearing seat (2), and the first adjustment component (32) being connected to the connecting component (31); The connecting assembly (31) includes a connecting plate (311), a connecting rod (312) and a plurality of steel sheets (313); the connecting plate (311) is arranged on the frame (1); one end of the connecting rod (312) and the plurality of steel sheets (313) are both arranged on the connecting plate (311); one end of the connecting rod (312) and the plurality of steel sheets (313) away from the connecting plate (311) are both connected to the bearing seat (2); and the plurality of steel sheets (313) are spaced apart and arranged on both sides of the connecting rod (312); The first adjusting assembly (32) includes a first clamping block (321), a second clamping block (322), a piston (323) and a plurality of piston rods. The first clamping block (321) and the second clamping block (322) are respectively arranged on the steel sheet (313) on both sides of the connecting rod (312). The first clamping block (321) and the second clamping block (322) are arranged at the connection between the steel sheet (313) and the bearing seat (2). An active cavity (4) is provided in the first clamping block (321). The piston (323) is provided in the active cavity (4). One end of the plurality of piston rods is provided on the second clamping block (322). One end of the plurality of piston rods away from the second clamping block (322) is connected to the piston (323). A liquid inlet interface (8) and a liquid outlet interface (9) are provided on the first clamping block (321). Both the liquid inlet interface (8) and the liquid outlet interface (9) are communicated with the active cavity (4). A clamping plate (5) is provided on the side walls of the first clamping block (321) and the second clamping block (322), and each of the clamping plates (5) is pressed against a steel sheet (313). The clamping plates (5) are provided with a plurality of second adjustment components (6) for adjusting the rigidity of the middle part of the steel sheet (313). One end of the clamping plate (5) away from the first clamping block (321) and the second clamping block (322) is connected to the connecting plate (311), and the connecting plate (311) is provided with a locking component (7) for locking the clamping plate (5) and the steel sheet (313).

2. The variable rigidity swing frame according to claim 1, characterized in that: Each group of the second adjustment components (6) includes an adjustment bolt (61), an adjustment nut (62), a support spring (63) and a plurality of support pieces (64); the adjustment bolt (61) passes through the steel sheet (313) and the clamping plate (5); the adjustment nut (62) is threadedly connected to the adjustment bolt (61); the support spring (63) and the plurality of support pieces (64) are both sleeved on the adjustment bolt (61); and the plurality of support pieces (64) are connected to both ends of the support spring (63).

3. The variable rigidity swing frame according to claim 1, characterized in that: Each group of the second adjustment components (6) includes a hollow bolt (65), a locking nut (66), a supporting airbag (67) and an inflation joint (68), wherein the hollow bolt (65) passes through the steel sheet (313) and the abutting plate (5), the locking nut (66) is threadedly connected to the hollow bolt (65), the supporting airbag (67) is arranged on the side wall of the hollow bolt (65) and is communicated with the hollow bolt (65), the supporting airbag (67) is located between the plurality of steel sheets (313), and the inflation joint (68) is communicated with the hollow bolt (65).

4. The variable rigidity swing frame according to claim 1, characterized in that: The locking assembly (7) includes a first locking block (71), a second locking block (72) and a magnetic member (73); the first locking block (71) and the second locking block (72) are both arranged on the connecting plate (311); the first locking block (71) is provided with a plurality of dovetail blocks (10); the second locking block (72) is provided with a plurality of dovetail grooves (11) for clamping the plurality of dovetail blocks (10); the magnetic member (73) is arranged on a surface of the first locking block (71) and the second locking block (72) facing the connecting plate (311).

5. The variable rigidity swing frame according to claim 2, characterized in that: An anti-loosening groove (12) is provided on the abutting plate (5) adjacent to the head of the adjusting bolt (61), the head of the adjusting bolt (61) is arranged in the anti-loosening groove (12), an anti-loosening washer (13) is provided on the adjusting bolt (61), and the anti-loosening washer (13) is arranged between the adjusting nut (62) and the abutting plate (5) adjacent to the adjusting nut (62).

6. The variable rigidity swing frame according to claim 1, characterized in that: The frame (1) is provided with a plurality of supporting members (14) for elastically supporting the bearing seat (2), and one end of each supporting member (14) away from the frame (1) is connected to the bearing seat (2).

7. The variable rigidity swing frame according to claim 6, characterized in that: Each of the supporting members (14) comprises a limiting sleeve (141), a supporting spring (142) and two supporting rods (143); one supporting rod (143) is arranged on the frame (1), and the other supporting rod (143) is arranged on the bearing seat (2); the two supporting rods (143) are arranged on the same straight line; the limiting sleeve (141) is connected to one end of the two supporting rods (143) that is close to each other; the supporting spring (142) is arranged in the limiting sleeve (141) and connected to the two supporting rods (143).

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