Heavy jacking structure

Abstract

The invention discloses a heavy jacking structure which comprises a main frame and is characterized by further comprising a plurality of sets of symmetrical supporting frames arranged on the main frame. The hydraulic assembly drives the supporting piece to move directionally, the transverse moving rod fixedly connected with the supporting piece drives the crank plate to rotate along the axis of the rotating shaft rod, the crank plate is driven to rotate along the axis of the rotating shaft rod, and the jacking roller is movably connected to the top end of the supporting frame and rotationally connected to the supporting frame through linkage assemblies movably connected to the two ends of the jacking roller, and the transverse moving rod is in transmission connection with the bottom end of the linkage assemblies. The jacking roller movably connected with the crank plate moves along the rotating shaft rod, so that the jacking roller jacks a plate placed at the top end of the jacking roller upwards, jacking is achieved through a crank plate rotating structure, the limitation of the high requirement for synchronism of multiple oil cylinders is overcome, and meanwhile the phenomena of jamming and shaking easily occurring when the multiple oil cylinders directly jack up and down are eradicated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of jacking equipment, in particular to a heavy jacking structure. BACKGROUND

[0002] The heavy jacking structure is a mechanical system for bearing and jacking hundreds to thousands of tons of extremely heavy load, which has the core characteristics of extremely large output force, extremely high structural stability and safety and reliability, is usually composed of large-diameter hydraulic cylinders, high-strength steel structure bases and jacks, and precise control systems, and is widely used in major engineering projects such as overall translation of large buildings, installation of heavy equipment, shipbuilding, bridge jacking and replacement; the automatic welding conveying line used in the heavy equipment manufacturing industry of the shipyard is an inevitable trend of manufacturing transformation towards intelligence, high efficiency and green; the steel plates in the shipyard are generally heavy and large in size.

[0003] The prior art has the following disadvantages: the structure of up-and-down straight jacking of the oil cylinder plus the guide column guide is a conventional way; however, considering the large range of load, there is a partial load working condition, and the synchronization of the oil liquid after the distribution of the oil cylinder is a big test, and the guide column type jacking is prone to jamming, shaking and noise. SUMMARY

[0004] The purpose of the present application is to provide a heavy jacking structure, which drives the directional motion of the support member through the hydraulic assembly, drives the horizontal moving rod fixedly connected to the support member to rotate along the axis of the rotating shaft, drives the jacking roller movably connected to the crank plate to move along the rotating shaft, and drives the jacking roller to jack up the plate placed at the top end, so as to realize jacking by the rotating structure of the crank plate, overcome the high requirement of synchronization of multiple oil cylinders, and eliminate the jamming and shaking phenomenon that occurs when multiple oil cylinders are jacked up and down.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a heavy jacking structure, comprising a main frame, characterized in that a plurality of symmetrical support frames are arranged on the main frame; a jacking roller is movably connected to the top end of the support frame, and the jacking roller is rotatably connected to the support frame through a linkage assembly movably connected at both ends; a horizontal moving rod is drivingly connected to the bottom end of the linkage assembly; a hydraulic assembly is arranged below the main frame, the hydraulic assembly is drivingly connected with a support member, and the support member drives the horizontal moving rod fixedly connected thereto to move horizontally along the main frame; when the hydraulic assembly drives the support member, the linkage assembly is driven to move along the axis of the linkage assembly and the support frame by the horizontal moving rod, and the linkage assembly drives the jacking roller to jack up the plate.

[0006] Further description of the above technical scheme:

[0007] The jacking roller comprises a rotating shaft, a crank plate symmetrically arranged at both ends of the rotating shaft, a supporting wheel fixedly connected to the rotating shaft, a limiting frame arranged at the crank plate, and a limiting cap arranged in the limiting frame and fixedly connected to the rotating shaft.

[0008] Further description of the above technical solution:

[0009] The hydraulic assembly comprises a bottom plate, a support block fixedly connected to the top end of the bottom plate, a hydraulic cylinder rotatably connected to one end of the support block, an extension rod arranged at one end of the hydraulic cylinder, and a connecting shaft fixedly connected to the end of the extension rod away from the hydraulic cylinder.

[0010] Further description of the above technical solution:

[0011] The support member comprises a horizontal column fixedly connected to the horizontal moving rod at both ends, a connecting seat fixedly connected to one end of the horizontal column, and a support column symmetrically fixedly connected to both ends of the connecting seat.

[0012] Further description of the above technical solution:

[0013] The crank plate is provided with a rotating groove at the top end, a rotating shaft rod movably connected in the rotating groove, and a rotating shaft seat symmetrically arranged at both ends of the rotating shaft rod and fixed to the main frame.

[0014] Further description of the above technical solution:

[0015] The crank plate is provided with an embedded groove at one end close to the rotating groove, a limiting rod fixedly connected in the embedded groove, a linkage rod arranged at one end of the limiting rod, a supporting spring sleeved on the outside of the limiting rod, and the supporting spring abutting against the supporting spring.

[0016] Further description of the above technical solution:

[0017] Further comprising a brake member, the brake member comprising a linkage rod, a matching wheel rotatably connected to one end of the linkage rod and abutting against the protruding shaft block, an active arm fixedly connected to the other end of the linkage rod, and a brake pad fixedly connected to the end of the active arm away from the linkage rod.

[0018] Further description of the above technical solution:

[0019] The crank plate is provided with a linkage shaft at the bottom end, the linkage shaft is drivingly connected to the horizontal moving rod, the horizontal moving rod is fixedly connected to a gasket at one end, the gasket is fixedly connected to a connecting column at one end, a locking rod is sleeved on the end of the connecting column away from the gasket, and a first spring is fixedly connected between the locking rod and the gasket.

[0020] Further description of the above technical solution:

[0021] Also include a self-locking frame, and the self-locking frame is arranged on the support frame, the self-locking frame includes a positioning plate, one end of the positioning plate is fixedly connected with a convex shaft block, the bottom end of the positioning plate is fixedly connected with a guide block, the guide block is provided with a locking groove, the end of the guide block close to the locking groove is movably provided with a sliding block, and the sliding block is slidably arranged in the guide groove of the guide block.

[0022] As a further description of the above technical solutions:

[0023] The end of the sliding block close to the locking groove is fixedly connected with a limiting strip, the other end of the sliding block is fixedly connected with a sliding strip, the two ends of the sliding strip are symmetrically fixedly connected with sliding blocks, the sliding blocks are slidably connected with directional rods, the two ends of the directional rods are symmetrically fixedly connected with fixed ears, and the fixed ears and the sliding blocks are fixedly connected with return springs.

[0024] The present application provides a heavy lifting structure, which has the following advantages:

[0025] In the present application, the support member is driven to move directionally by the hydraulic assembly, the cross-moving rod fixed to the support member drives the crank plate to rotate around the axis of the rotating shaft, the lifting roller movably connected to the crank plate moves along the rotating shaft, so that the lifting roller lifts the plate placed on the top end upward, the lifting is realized by the rotation structure of the crank plate, which overcomes the high requirement of synchronization of multiple oil cylinders and eliminates the jamming and shaking phenomenon that easily occurs when multiple oil cylinders directly lift upward. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A structural schematic view of the heavy lifting structure is provided in the present application;

[0027] Figure 2 A structural schematic view of the support member is provided in the present application;

[0028] Figure 3 A structural schematic view of the cross-moving rod is provided in the present application;

[0029] Figure 4 A structural schematic view of the hydraulic cylinder is provided in the present application; Figure 3 An enlarged view of A in the present application;

[0030] Figure 5 A structural schematic view of the hydraulic cylinder is provided in the present application;

[0031] Figure 6 A structural schematic view of the brake pad is provided in the present application;

[0032] Figure 7 An enlarged view of B in the present application; Figure 6 An enlarged view of B in the present application;

[0033] Figure 8 A structural schematic view of the positioning plate is provided in the present application;

[0034] Figure 9 Schematic diagram of the structure of the guide block in the present invention;

[0035] Figure 10 Schematic diagram of the structure of the locking rod in the present invention.

[0036] Legend: 1. Main frame; 11. Support legs; 12. Rotating shaft seat; 13. Rotating shaft rod; 2. Hydraulic assembly; 21. Hydraulic cylinder; 22. Telescopic rod; 23. Connecting shaft; 24. Support block; 25. Bottom plate; 3. Support member; 31. Cross column; 32. Pillar; 33. Connecting seat; 4. Transverse rod; 41. Gasket; 42. Connecting column; 43. Locking rod; 44. First spring; 5. Lifting roller; 51. Rotating shaft; 52. Support wheel; 53. Limiting cap; 6. Linking assembly; 61. Crank plate; 62. Rotating Rotating groove; 63. Limiting frame; 64. Linking shaft; 65. Built-in groove; 7. Self-locking frame; 71. Positioning plate; 72. Raised shaft block; 73. Guide block; 731. Guide groove; 74. Locking groove; 75. Sliding block; 751. Limiting bar; 752. Sliding bar; 753. Sliding block; 76. Resetting member; 761. Orienting rod; 762. Resetting spring; 763. Fixing ear; 8. Braking member; 81. Linking rod; 82. Fitting wheel; 83. Movable arm; 84. Brake pad; 85. Limiting rod; 86. Support spring. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] Reference Figures 1-10 A heavy-duty jacking structure includes a main frame 1, which is characterized in that it also includes multiple groups of symmetrical support frames arranged on the main frame 1; the top of the support frame is movably connected with a jacking roller 5, and the jacking roller 5 is rotatably connected to the support frame through a linkage assembly 6 movably connected at both ends, and the bottom end of the linkage assembly 6 is transmission-connected with a transverse rod 4; it also includes a hydraulic assembly 2 arranged under the main frame 1, the hydraulic assembly 2 is transmission-connected with a support member 3, and the support member 3 drives the fixedly connected transverse rod 4 to move horizontally along the main frame 1 through the hydraulic assembly 2; when the hydraulic assembly 2 drives the support member 3, the transverse rod 4 drives the linkage assembly 6 to move along the center of the connecting shaft 23 between the linkage assembly 6 and the support frame, and the linkage assembly 6 drives the jacking roller 5 to lift the plate.

[0039] Specifically, the main frame 1 is symmetrically distributed in a rectangular structure at both ends of the jacking roller 5, the main frame 1 is supported by the support legs 11 fixedly connected at the bottom ends, the support frame is supported by the linkage assembly 6 movably connected at both ends of the jacking roller 5, the support frame comprises the rotating shaft seat 12 fixed on the main frame 1, the rotating shaft rod 13 movably connected with the crank plate 61 in the linkage assembly 6 and located between the two rotating shaft seats 12, when the hydraulic assembly 2 drives the support 3 to move in a direction, the horizontal moving rod 4 fixedly connected with the support 3 drives the crank plate 61 to rotate along the axis of the rotating shaft rod 13, the jacking roller 5 movably connected with the crank plate 61 moves along the rotating shaft rod 13, so that the jacking roller 5 jacks up the plate placed at the top end of the jacking roller 5, the rotation structure of the crank plate 61 is used to realize jacking, which overcomes the high requirement of synchronization of multiple oil cylinders and eliminates the jamming and shaking phenomenon that easily occurs when multiple oil cylinders vertically jack up.

[0040] The jacking roller 5 comprises the rotating shaft 51, the crank plates 61 are symmetrically and penetratingly arranged at both ends of the rotating shaft 51, the support wheels 52 are fixedly connected on the rotating shaft 51, the limiting frames 63 are arranged on the rotating shaft 51 penetrating the crank plates 61, the limiting caps 53 are arranged in the limiting frames 63 and fixedly connected on the rotating shaft 51; the hydraulic assembly 2 comprises the bottom plate 25, the support blocks 24 are fixedly connected at the top end of the bottom plate 25, the hydraulic cylinders 21 are movably connected at one end of the support blocks 24, the connecting shafts 23 are fixedly connected at the ends of the telescopic rods 22 away from the hydraulic cylinders 21; the support 3 comprises the horizontal columns 31 fixedly connected at both ends of the horizontal moving rod 4, the connecting seats 33 are fixedly connected at one end of the horizontal columns 31, and the support columns 32 are symmetrically and fixedly connected at both ends of the connecting seats 33.

[0041] Specifically, the rotating shaft 51 of the jacking roller 5 penetrates the crank plates 61 and is limited by the limiting frames 63, and finally the limiting caps 53 limit the rotating shaft 51 movably connected in the limiting frames 63 on the crank plates 61, the bottom plate 25 in the hydraulic assembly 2 is used as a support, the support blocks 24 fixedly connected with the hydraulic cylinders 21 are movably connected, the hydraulic cylinders 21 drive the telescopic rods 22 to move the connecting shafts 23 to the support 3, the connecting shafts 23 are movably connected with the connecting seats 33 fixedly connected on the horizontal columns 31, when the hydraulic cylinders 21 drive the support 3 connected with the telescopic rods 22 to move, the support blocks 24 connected with the hydraulic cylinders 21 and the connecting shafts 23 connected with the connecting seats 33 ensure that the support 3 moves stably, and the hydraulic cylinders 21 can be adjusted according to the moving direction of the support 3 so as to be more stable when driving the support 3 to move.

[0042] The top end of the crank plate 61 is provided with a rotating groove 62, a rotating shaft rod 13 is movably connected in the rotating groove 62, the rotating shaft rod 13 is symmetrically provided with rotating shaft seats 12 at both ends, and the rotating shaft seats 12 are fixed on the main frame 1; the end of the crank plate 61 close to the rotating groove 62 is provided with an embedded groove 65, a limiting rod 85 is fixedly connected in the embedded groove 65, the limiting rod 85 is penetrated by a connecting rod 81 at one end, a supporting spring 86 is sleeved on the outer side of the limiting rod 85, and the supporting spring 86 is abutted on the supporting spring 86; further comprising a brake 8, the brake 8 comprises the connecting rod 81, the connecting rod 81 is rotatably connected with a matching wheel 82 at one end, the matching wheel 82 is abutted on the protruding shaft block 72, the connecting rod 81 is fixedly connected with a movable arm 83 at the other end, and the movable arm 83 is fixedly connected with a brake pad 84 at the end away from the connecting rod 81.

[0043] Specifically, the rotating rod is rotatably connected in the rotating groove 62 of the crank plate 61, and the connecting rod 81 is slidably connected in the embedded groove 65 of the crank plate 61, when the crank plate 61 rotates along the rotating shaft rod 13, the matching wheel 82 rotatably connected at one end of the connecting rod 81 is abutted on the protruding shaft block 72 to move, so that the matching wheel 82 drives the connecting rod 81 to move along the limiting rod 85 penetrated by the connecting rod 81, and the supporting spring 86 in the embedded groove 65 is stressed, the movable arm 83 fixedly connected with the connecting rod 81 and the brake pad 84 fixedly connected with the movable arm 83 are abutted on the rotating shaft 51 under the driving of the connecting rod 81, so that the jacking roller 5 is frictionally locked by the brake pad 84 when moving, so that the jacking roller 5 is in a stopped state when moving, when the protruding part of the protruding shaft block 72 where the matching wheel 82 moves, the brake pad 84 is separated from the rotating shaft 51, and does not affect the subsequent use of the jacking roller 5, the device is simple in structure, flexible in use, and is worth being widely promoted.

[0044] The bottom end of the crank plate 61 is provided with a connecting shaft 64, and the connecting shaft 64 is drivingly connected with the transverse rod 4, the transverse rod 4 is fixedly connected with a gasket 41 at one end, the gasket 41 is fixedly connected with a connecting column 42 at one end, the connecting column 42 is sleeved with a locking rod 43 at the end away from the gasket 41, and the locking rod 43 is fixedly connected with the gasket 41 through a first spring 44; further comprising a self-locking frame 7, and the self-locking frame 7 is arranged on the supporting frame, the self-locking frame 7 comprises a positioning plate 71, the positioning plate 71 is fixedly connected with a protruding shaft block 72 at one end, the bottom end of the positioning plate 71 is fixedly connected with a guide block 73, the guide block 73 is provided with a locking groove 74, the end of the guide block 73 close to the locking groove 74 is movably provided with a sliding block 75, and the sliding block 75 is slidably arranged in the guide groove 731 of the guide block 73; the end of the sliding block 75 close to the locking groove 74 is fixedly connected with a limiting strip 751, the other end of the sliding block 75 is fixedly connected with a sliding strip 752, the both ends of the sliding strip 752 are symmetrically fixedly connected with sliding blocks 753, the sliding blocks 753 are slidably connected with directional rods 761, the both ends of the directional rods 761 are symmetrically fixedly connected with fixed ears 763, and the fixed ears 763 are fixedly connected with the sliding blocks 753 through return springs 762.

[0045] Specifically, the crank plate 61 bottom end through the connecting shaft 64 and horizontal moving rod 4 active connection, when the hydraulic cylinder 21 drive telescopic rod 22 with horizontal column 31 and the support column 32 solid connection horizontal overflow rod movement, located in the horizontal moving rod 4 solid connection gasket 41 connected to the connecting column 42, connecting column 42 through the first spring 44 will lock bar 43 elastic resistance on the guide block 73, when the horizontal moving rod 4 drive crank plate 61 along the shaft rod 13 axis movement, lock bar 43 along the guide block 73 to the lock groove 74 direction movement, when the lock bar 43 movement to the lock groove 74, the synchronous movement of the jacking roller 5 to the highest, the state under the lock groove 74 through the positioning plate 71 unloading, reduce the pressure in the hydraulic cylinder 21, when you need to reset the jacking roller 5, the hydraulic cylinder 21 drive telescopic rod 22 with crank plate 61 continue to move, will lock bar 43 along the lock groove 74 to the sliding block 75, and through the sliding block 75 solid connection limit strip 751 on the lock bar 43 limit, then the hydraulic cylinder 21 drive telescopic rod 22 shrink, so that the lock bar 43 drive sliding block 75 movement, sliding block 75 through the sliding bar 752 along the guide block 73 direction groove movement, at the same time, located in the sliding bar 752 solid connection slider 753 extrusion located in the reset part 76 in the direction of the rod 761 outer sleeve reset spring 762 stress, when the sliding block 75 in the lock bar 43 drive movement to the end of the direction groove, sliding block 75 cover lock groove 74, then the lock bar 43 extrusion first spring 44 shrink, so that the lock bar 43 and limit strip 751 separate, has realized the lock bar 43 automatic locking and separation effect, improve the height of the device running automation.

[0046] Working principle: the main frame 1 is supported by the support leg 11 fixedly connected at the bottom end, the support frame is supported by the linkage assembly 6 movably connected at both ends of the jacking roller 5, the support frame comprises the rotating shaft seat 12 fixed on the main frame 1, the rotating shaft rod 13 movably connected with the linkage assembly 6 between the two rotating shaft seats 12, and the crank plate 61 movably connected with the linkage assembly 6, when the hydraulic assembly 2 drives the support 3 to move directionally, the cross moving rod 4 fixedly connected with the support 3 drives the crank plate 61 to rotate along the rotating shaft rod 13, the jacking roller 5 movably connected with the crank plate 61 moves along the rotating shaft rod 13, so that the jacking roller 5 jacks up the plate placed at the top end, and the jacking is realized by the rotating structure of the crank plate 61, wherein, when the crank plate 61 rotates along the rotating shaft rod 13, the abutting wheel 82 movably connected at one end of the linkage rod 81 moves on the convex shaft block 72, so that the abutting wheel 82 drives the linkage rod 81 to move along the limiting rod 85 penetrating through the linkage rod 81, and the support spring 86 in the built-in groove 65 is stressed, the movable arm 83 fixedly connected with the linkage rod 81 and the brake pad 84 fixedly connected with the movable arm 83 are abutted with the rotating shaft 51 under the driving of the linkage rod 81, so that the jacking roller 5 is frictionally locked by the brake pad 84 when moving, so that the jacking roller 5 is in a stopped state when moving, when the convex shaft block 72 protrudes when the abutting wheel 82 moves, the brake pad 84 is separated from the rotating shaft 51, which does not affect the subsequent use of the jacking roller 5, secondly, when the cross moving rod 4 drives the crank plate 61 to move along the rotating shaft rod 13, the lock rod 43 moves along the guide block 73 to the lock groove 74, when the lock rod 43 moves into the lock groove 74, the jacking roller 5 moves to the highest position synchronously, in this state, the lock groove 74 is unloaded by the positioning plate 71, and the pressure in the hydraulic cylinder 21 is reduced, when it is needed to reset the jacking roller 5, the hydraulic cylinder 21 drives the telescopic rod 22 to drive the crank plate 61 to continue to move, the lock rod 43 moves along the lock groove 74 to the sliding block 75, and the lock rod 43 is limited by the limiting strip 751 fixedly connected with the sliding block 75, then the hydraulic cylinder 21 drives the telescopic rod 22 to contract, so that the lock rod 43 drives the sliding block 75 to move, the sliding block 75 moves along the directional groove in the guide block 73 through the sliding strip 752, at the same time, the sliding block 753 fixedly connected with the sliding strip 752 extrudes the reset spring 762 outside the directional rod 761 in the reset part 76, when the sliding block 75 moves to the end of the directional groove under the driving of the lock rod 43, the sliding block 75 covers the lock groove 74, then the lock rod 43 extrudes the first spring 44 to contract, so that the lock rod 43 is separated from the limiting strip 751, and the effect that the lock rod 43 is automatically locked and separated is realized.

[0047] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A heavy-duty jacking structure comprising a main frame (1), characterized in that: It also includes multiple groups of symmetrical support frames arranged on the main frame (1); The top end of the support frame is movably connected to a lifting roller (5), and the lifting roller (5) is rotatably connected to the support frame through a linkage assembly (6) movably connected at both ends, and the bottom end of the linkage assembly (6) is transmission-connected to a transverse rod (4); It also includes a hydraulic assembly (2) disposed under the main frame (1), wherein the hydraulic assembly (2) is in transmission connection with a support member (3), and the support member (3) drives a fixedly connected transverse rod (4) to move in a horizontal direction along the main frame (1) through the hydraulic assembly (2); When the hydraulic assembly (2) drives the support member (3), the linkage assembly (6) is driven by the transverse rod (4) to move along the center of the connecting shaft (23) between the linkage assembly (6) and the support frame, and the linkage assembly (6) drives the lifting roller (5) to lift the plate.

2. A heavy-duty lifting structure according to claim 1, characterized in that: The lifting roller (5) includes a rotating shaft (51), crank plates (61) are symmetrically passed through both ends of the rotating shaft (51), a supporting wheel (52) is fixedly connected to the rotating shaft (51), a limiting frame (63) is provided on the rotating shaft (51) passing through the crank plate (61), a limiting cap (53) is provided in the limiting frame (63), and the limiting cap (53) is fixedly connected to the rotating shaft (51).

3. A heavy-duty lifting structure according to claim 1, characterized in that: The hydraulic assembly (2) comprises a base plate (25), a support block (24) is fixedly connected to the top end of the base plate (25), one end of the support block (24) is rotatably connected to a hydraulic cylinder (21), one end of the hydraulic cylinder (21) is provided with a telescopic rod (22), and the end of the telescopic rod (22) away from the hydraulic cylinder (21) is fixedly connected to a connecting shaft (23).

4. A heavy-duty lifting structure according to claim 1, characterized in that: The support member (3) comprises a transverse column (31), and both ends of the transverse column (31) are fixedly connected to the transverse rod (4); one end of the transverse column (31) is fixedly connected to a connecting seat (33), and both ends of the connecting seat (33) are symmetrically fixedly connected to pillars (32).

5. The heavy-duty lifting structure according to claim 2, characterized in that: A rotation groove (62) is provided at the top of the crank plate (61), a rotating shaft rod (13) is movably connected in the rotating groove (62), and rotating shaft seats (12) are symmetrically provided at both ends of the rotating shaft rod (13), and the rotating shaft seats (12) are fixed on the main frame (1).

6. A heavy-duty lifting structure according to claim 2, characterized in that: An end of the crank plate (61) close to the rotating groove (62) is provided with an internal groove (65), a limiting rod (85) is fixedly connected in the internal groove (65), one end of the limiting rod (85) passes through a connecting rod (81), and a support spring (86) is sleeved on the outer side of the limiting rod (85), and the support spring (86) is against the support spring (86).

7. The heavy-duty lifting structure according to claim 1, characterized in that: The brake member (8) further comprises a connecting rod (81), one end of the connecting rod (81) being rotatably connected to a fitting wheel (82), and the fitting wheel (82) being attached to the raised shaft block (72), the other end of the connecting rod (81) being fixedly connected to a movable arm (83), and the end of the movable arm (83) away from the connecting rod (81) being fixedly connected to a brake pad (84).

8. The heavy-duty lifting structure according to claim 2, characterized in that: A connecting shaft (64) is provided at the bottom end of the crank plate (61), and the connecting shaft (64) is transmission-connected to the transverse rod (4), one end of the transverse rod (4) is fixedly connected to a gasket (41), one end of the gasket (41) is fixedly connected to a connecting column (42), and one end of the connecting column (42) away from the gasket (41) is sleeved with a locking rod (43), and a first spring (44) is fixedly connected between the locking rod (43) and the gasket (41).

9. The heavy-duty lifting structure according to claim 1, characterized in that: The self-locking frame (7) is further provided on the support frame. The self-locking frame (7) includes a positioning plate (71), one end of the positioning plate (71) is fixedly connected to a raised shaft block (72), the bottom end of the positioning plate (71) is fixedly connected to a guide block (73), a locking groove (74) is provided in the guide block (73), and a sliding block (75) is movably provided at one end of the guide block (73) close to the locking groove (74), and the sliding block (75) is slidably provided in the guide groove (731) provided in the guide block (73).

10. A heavy-duty lifting structure according to claim 9, characterized in that: One end of the sliding block (75) close to the locking groove (74) is fixedly connected to a limit strip (751), the other end of the sliding block (75) is fixedly connected to a sliding strip (752), both ends of the sliding strip (752) are symmetrically fixedly connected to sliders (753), a directional rod (761) is slidably connected inside the slider (753), both ends of the directional rod (761) are symmetrically fixedly connected to fixing ears (763), and a return spring (762) is fixedly connected between the fixing ears (763) and the slider (753).

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