A multi-degree-of-freedom adjustable crane lifting tool suitable for irregularly shaped workpieces

Abstract

This invention relates to the field of lifting equipment technology, specifically disclosing a multi-degree-of-freedom adjustable crane lifting equipment suitable for irregularly shaped workpieces. The equipment includes a first adjustment structure, a second adjustment structure, and several clamping structures. The second adjustment structure is movably disposed below the first adjustment structure, and the clamping structures are equidistantly disposed on the second adjustment structure in a clockwise direction. This lifting equipment can not only adapt to the lifting operations of various irregularly shaped workpieces such as irregular castings, curved components, asymmetrical shells, and special profiles, but also meet the lifting needs of conventionally shaped workpieces by quickly adjusting the clamping parameters. It eliminates the need for frequent changes of lifting equipment for different workpieces, effectively reducing preparation time and improving lifting efficiency. It is widely applicable to multiple industries such as machining, equipment manufacturing, construction, and logistics, and has extremely high practical value and market potential.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lifting devices, in particular to a multi-degree-of-freedom adjusting crane lifting device suitable for special-shaped workpieces. BACKGROUND

[0002] In the industries of mechanical processing, equipment manufacturing, construction and logistics transfer, the lifting operation of special-shaped workpieces such as irregular castings, curved surface components, asymmetric shells and special profiles has always been a difficulty. Traditional lifting devices are mostly fixed structures with single clamping form, which are only suitable for regular-shaped workpieces and cannot match the profile, center of gravity and attitude requirements of special-shaped workpieces, thus having obvious limitations in actual use. Moreover, the existing lifting devices are mostly bidirectional clamping, which cannot stably clamp irregular workpieces. Conventional lifting devices are mostly rigidly connected and cannot realize multi-directional inclination and angle fine adjustment, especially when lifting special-shaped workpieces, the center of gravity is easy to deviate and the attitude is easy to tilt, which cannot meet the safe transfer requirements of precision special-shaped workpieces. SUMMARY

[0003] The present application aims to provide a multi-degree-of-freedom adjusting crane lifting device suitable for special-shaped workpieces to solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a multi-degree-of-freedom adjusting crane lifting device suitable for special-shaped workpieces, comprising a first adjusting structure, a second adjusting structure and a plurality of clamping structures; the second adjusting structure is movably arranged below the first adjusting structure, and the plurality of clamping structures are equidistantly arranged on the second adjusting structure and arranged along the clockwise direction; wherein the first adjusting structure is used to be connected with a lifting machine device, and the first adjusting structure can adjust the multi-directional inclination of the second adjusting structure; the second adjusting structure is used to bear the plurality of clamping structures, and the second adjusting structure can adjust the relative spacing of the clamping structures; the plurality of clamping structures are arranged in the clockwise direction, forming a plurality of directions to simultaneously apply force for clamping, and the position and spacing of the second adjusting structure can be adjusted to match the lifting of special-shaped or normal-shaped workpieces.

[0005] Preferably, the first control structure comprises a first mounting disc, a boom, a plurality of first wheel seats, a plurality of first guide wheels, a plurality of first hydraulic cylinder bodies and a plurality of first steel ropes; the first mounting disc is circular, one end of the boom is fixedly connected to the middle of the upper wall of the first mounting disc, and the other end of the boom is provided with a hanging opening, one end of each of the plurality of first wheel seats is equidistantly arranged on the side wall of the first mounting disc and arranged in a clockwise direction, each of the plurality of first guide wheels is movably arranged on the other end of the first wheel seat, one end of each of the plurality of first hydraulic cylinder bodies is fixedly penetrated through the first mounting disc, and the first hydraulic cylinder body corresponds to the first guide wheel, one end of each of the plurality of first steel ropes is fixedly connected to the telescopic end of the first hydraulic cylinder body, and the other end of each of the plurality of first steel ropes is downwardly guided through the first guide wheel.

[0006] Preferably, the second control structure comprises a second mounting disc, a plurality of adjusting arms, a plurality of fastening bolts, a plurality of fastening nuts and a plurality of electric sliding rails; the second mounting disc is circular and has a diameter larger than that of the first mounting disc, the second mounting disc is movably arranged below the first mounting disc, the second mounting disc is equidistantly provided with a plurality of arc-shaped adjusting grooves, one end of each of the plurality of adjusting arms is movably arranged on the upper wall of the second mounting disc, the movable connection position of the adjusting arm corresponds to the middle of the adjusting groove, a fitting groove is formed in the middle of one end of each of the plurality of adjusting arms and can be in communication with the adjusting groove, the other end of each of the plurality of adjusting arms is connected with the other end of the first steel rope, one end of each of the plurality of fastening bolts is movably penetrated through the fitting groove and the adjusting groove, each of the plurality of fastening nuts is screwed on the fastening bolt and fixedly attached to the lower wall of the second mounting disc, and each of the plurality of electric sliding rails is fixedly arranged on the lower wall of the other end of the adjusting arm.

[0007] Preferably, the clamping structure comprises a supporting unit and a force applying unit; the force applying unit is fixedly arranged on the supporting unit.

[0008] Preferably, the supporting unit comprises an adapter seat, a turnover arm, a plurality of clamping arms, a plurality of adjusting bolts, a plurality of adjusting nuts and a damping spring body; one end of the adapter seat is fixedly arranged on one of the electric sliding rails, and is driven to move along the adjusting arm by the electric sliding rail; a wire groove is arranged in the middle of the adapter seat; one end of the turnover arm is movably embedded in the other end of the adapter seat, and the maximum included angle between the turnover arm and the adapter seat is 135 degrees; a plurality of positioning holes are equidistantly arranged at the other end of the turnover arm; a plurality of clamping arms are equidistantly provided with the same positioning holes as the turnover arm at one end, and the other end of the clamping arm has a different shape structure; one end of the clamping arm is detachably arranged on the other end of the turnover arm; a plurality of adjusting bolts are movably penetrated through the positioning holes of the other end of the turnover arm and the positioning holes of one end of the clamping arm; a plurality of adjusting nuts are screwed on the adjusting bolts to fix the turnover arm and the clamping arm; and the damping spring body is movably connected between the middle of the side wall of the turnover arm and the middle of the side wall of the adapter seat, and is arranged obliquely.

[0009] Preferably, the force applying unit comprises a second hydraulic cylinder body, a pair of second guide wheels and a second steel rope; one end of the second hydraulic cylinder body is fixedly penetrated through the middle of one end of the adapter seat; one of the second guide wheels is movably arranged in the middle of the wire groove; the other of the second guide wheels is movably arranged on the lower wall of the middle of the turnover arm and located below the damping spring body; one end of the second steel rope is fixedly connected to the telescopic end of the second hydraulic cylinder body; the other end of the second steel rope is movably penetrated through the wire groove and fixedly connected to the lower wall of the turnover arm after being guided by the two second guide wheels.

[0010] Preferably, the second hydraulic cylinder body is elongated to drive the turnover arm to turn over and compress the damping spring body, so as to clamp and fix.

[0011] Preferably, the clamping structure can adjust the clamping range through the electric sliding rail body.

[0012] Preferably, the adjusting arm can swing along the positioning groove of the second mounting disc, and the adjusting arm is fixed by the fastening bolt and the fastening nut.

[0013] Preferably, the first hydraulic cylinder body is elongated to drive the adjusting arm to pull the workpiece to be clamped to be inclined.

[0014] The multi-degree-of-freedom adjusting crane hoist suitable for special-shaped workpieces has the beneficial effects that: 1. This invention, through the independent drive of multiple sets of first hydraulic cylinders in the first control structure to differentially retract and extend the corresponding first steel rope, combined with the guiding effect of the first guide wheel, can apply multi-directional controllable tension to the second control structure, realizing the tilting posture adjustment of the second mounting plate and the clamped workpiece in any direction and at any angle. It can accurately match the center of gravity position and lifting posture requirements of irregular workpieces, completely solving the problems of center of gravity offset, posture skew, accidental overturning and violent shaking that are common when traditional rigid lifting tools lift irregular workpieces. It meets the high-precision and safe transfer requirements of precision irregular workpieces. At the same time, the maximum opening and closing angle design of 135° between the flipping arm and the adapter in the clamping structure further enhances the posture adaptability to the tilted wall surface of the workpiece.

[0015] 2. This invention constructs a three-level adjustable flexible clamping system with adjustable clamping angle, clamping width, and clamping end shape: The adjusting arm of the second control structure can swing freely along the arc-shaped adjustment groove of the second mounting plate, and the position can be quickly locked by fastening bolts and nuts, flexibly adjusting the angle of adjacent clamping structures to adapt to irregularly shaped workpieces with different outer peripheral contours; the electric slide rail on the lower wall of the adjusting arm can drive the clamping structure to move radially in a straight line, realizing stepless adjustment of the clamping width and being compatible with workpieces of different sizes and specifications; the clamping arm of the clamping structure adopts a detachable modular design, and the clamping arm of the corresponding shape can be replaced according to the special shape of the workpiece such as curved surface, edge, and groove, ensuring that the clamping end fits the workpiece wall and avoiding uneven clamping force and local stress concentration caused by poor contact.

[0016] 3. Several clamping structures are arranged in a clockwise ring at equal intervals along the second mounting plate, forming a multi-directional synchronous force-applying clamping mode. Compared with the traditional bidirectional clamping method, the clamping force distribution is more balanced, which can effectively prevent irregularly shaped workpieces from slipping or being squeezed and deformed during the entire process of lifting, transferring, and placing. The force-applying unit adopts a hydraulic drive combined with steel cable transmission, and the power output is stable and controllable. The clamping force can be precisely adjusted by the output pressure of the second hydraulic cylinder, which can not only ensure firm clamping, but also avoid damage to the surface of precision workpieces due to excessive clamping force. At the same time, the shock-absorbing spring body set at an angle in the support unit can absorb vibration and impact during clamping and lifting, further improving the stability of the lifting process.

[0017] In summary, this lifting tool is not only suitable for lifting various irregularly shaped workpieces such as castings, curved components, asymmetrical shells, and special profiles, but it can also meet the lifting needs of conventionally shaped workpieces by quickly adjusting the clamping parameters. This eliminates the need for frequent tool changes for different workpieces, effectively reducing preparation time and improving lifting efficiency. It is widely applicable to various industries such as machining, equipment manufacturing, construction, and logistics, and has extremely high practical value and promising market prospects. Attached Figure Description

[0018] Figure 1Assembling structure schematic diagram of the present application; Figure 2 Assembling structure schematic diagram of the first regulating structure and the second regulating structure of the present application; Figure 3 Assembling structure schematic diagram of the first regulating structure of the present application; Figure 4 Assembling structure schematic diagram of the second regulating structure of the present application; Figure 5 Assembling structure schematic diagram of the clamping structure of the present application; Figure 6 Assembling structure schematic diagram of the clamping structure of the present application; Figure 5 Assembling structure schematic diagram of the clamping structure of the present application; Figure 7 Assembling structure schematic diagram of the clamping structure of the present application; Figure 1 Assembling structure schematic diagram of the clamping structure of the present application.

[0019] In the figure: 1, the first regulating structure, 11, the first mounting disc, 12, the boom, 13, the first wheel seat, 14, the first guide wheel, 15, the first hydraulic cylinder main body, 16, the first steel rope, 2, the second regulating structure, 21, the second mounting disc, 22, the adjusting arm, 23, the fastening bolt, 24, the fastening nut, 25, the electric sliding rail, 3, the clamping structure, 31, the supporting unit, 311, the adapter seat, 312, the turnover arm, 313, the clamping arm, 314, the adjusting bolt, 315, the adjusting nut, 316, the shock absorbing spring main body, 32, the force applying unit, 321, the second hydraulic cylinder main body, 322, the second guide wheel, 323, the second steel rope; 4, the position adjusting groove, 5, the matching groove, 6, the wire groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0021] Please refer to Figures 1-7The application provides a technical scheme: a multi-freedom adjusting crane sling suitable for special-shaped workpieces, comprising a first adjusting structure 1, a second adjusting structure 2 and a plurality of clamping structures 3; the second adjusting structure 2 is movably arranged below the first adjusting structure 1, and the plurality of clamping structures 3 are equidistantly arranged on the second adjusting structure 2 and arranged in a clockwise direction; wherein the first adjusting structure 1 is used for being connected with a hoisting machine device, and the first adjusting structure 1 can adjust the multi-directional inclination of the second adjusting structure 2; the second adjusting structure 2 is used for bearing the plurality of clamping structures 3, and the second adjusting structure 2 can adjust the relative spacing of the clamping structures 3; the plurality of clamping structures 3 are arranged in a clockwise direction, so that synchronous force is applied in multiple directions for clamping, and the position and spacing of the second adjusting structure 2 can be adjusted to match the hoisting of workpieces in special shapes or normal shapes.

[0022] As a preferred scheme, further, the first adjusting structure 1 comprises a first mounting disc 11, a boom 12, a plurality of first wheel seats 13, a plurality of first guide wheels 14, a plurality of first hydraulic cylinder bodies 15 and a plurality of first steel ropes 16; the first mounting disc 11 is circular, one end of the boom 12 is fixedly connected to the middle part of the upper wall of the first mounting disc 11, and the other end of the boom 12 is provided with a hanging opening; one end of each of the plurality of first wheel seats 13 is equidistantly arranged on the side wall of the first mounting disc 11 and arranged in a clockwise direction; each of the plurality of first guide wheels 14 is movably arranged on the other end of each of the plurality of first wheel seats 13; one end of each of the plurality of first hydraulic cylinder bodies 15 is fixedly penetrated through the first mounting disc 11, and each of the plurality of first hydraulic cylinder bodies 15 corresponds to one of the plurality of first guide wheels 14; one end of each of the plurality of first steel ropes 16 is fixedly connected to the telescopic end of each of the plurality of first hydraulic cylinder bodies 15, and the other end of each of the plurality of first steel ropes 16 is downwardly guided through the corresponding first guide wheel 14; the boom 12 is connected with an external hoisting device through the top hanging opening, so as to realize the suspension and hoisting of the whole sling; the first mounting disc 11 serves as a mounting base and provides stable support for each component; the first wheel seats 13 and the first guide wheels 14 arranged equidistantly along the side wall of the first mounting disc 11 form uniformly distributed guide units; the first hydraulic cylinder body 15 is fixedly installed on the first mounting disc 11, and the telescopic end thereof is connected with one end of the first steel rope 16; after the first steel rope 16 is turned through the corresponding first guide wheel 14, the first steel rope 16 extends downward and is connected to the second adjusting structure 2; when one or more of the first hydraulic cylinder bodies 15 perform telescopic actions, the corresponding first steel ropes 16 are retracted or extended, and under the guidance of the first guide wheels 14, tension is applied to the corresponding directions of the second adjusting structure 2; through the differential retraction and extension of the plurality of first steel ropes 16, the inclination angle adjustment of the second adjusting structure 2 in multiple directions is realized.

[0023] More specifically, the first control structure 1 is connected with the external crane hook through the hanging port at the top of the boom 12, realizing the suspension and lifting of the whole lifting tool; the circular first mounting disc 11 serves as an integrated upper mounting base, providing rigid support for all the upper adjusting components; a plurality of first wheel seats 13 are fixedly installed along the side wall of the first mounting disc 11 in a clockwise and equidistant manner, and each first wheel seat 13 is movably installed with a first guide wheel 14 at the end, forming a guide unit corresponding to a first hydraulic cylinder body 15; a plurality of first hydraulic cylinder bodies 15 are vertically fixed on the first mounting disc 11, and the extension end thereof is fixedly connected with the upper end of a corresponding first steel rope 16, and the lower end of the first steel rope 16 is connected to the upper end of an adjusting arm 22 of the second control structure 2 after being turned by the corresponding first guide wheel 14; when it is necessary to adjust the inclination of the second control structure 2 and the clamped workpiece, according to the center of gravity position of the special-shaped workpiece and the target lifting angle, any one or more first hydraulic cylinder bodies 15 are independently controlled to perform the extension and retraction action: when a certain first hydraulic cylinder body 15 is elongated, the extension end thereof pulls the corresponding first steel rope 16 to wind down, and after being guided by the first guide wheel 14, an upward pulling force is applied to the corresponding direction of the second control structure 2; when a certain first hydraulic cylinder body 15 is retracted, the corresponding first steel rope 16 is loosened, and the corresponding direction of the second control structure 2 is inclined downward under the action of gravity; through the differential synchronous extension and retraction of a plurality of first hydraulic cylinder bodies 15, the continuous inclination adjustment of the second control structure 2 in any direction on the horizontal plane within the range of 0° to the preset maximum angle is realized, so that the center of gravity of the clamped workpiece is always near the vertical lifting axis of the lifting tool.

[0024] As a preferred solution, further, the second control structure 2 comprises a second mounting disc 21, a plurality of adjusting arms 22, a plurality of fastening bolts 23, a plurality of fastening nuts 24 and a plurality of electric sliding rails 25; the second mounting disc 21 is circular, and the diameter of the second mounting disc 21 is greater than that of the first mounting disc 11, the second mounting disc 21 is movably arranged below the first mounting disc 11, the second mounting disc 21 is provided with a plurality of arc-shaped adjusting grooves 4 at equal intervals, one end of each of the plurality of adjusting arms 22 is movably arranged on the upper wall of the second mounting disc 21, and the movable connection position of the adjusting arm 22 corresponds to the middle part of the adjusting groove 4, a fitting groove 5 is formed in the middle part of one end of each of the plurality of adjusting arms 22, and the fitting groove 5 can communicate with the adjusting groove 4, the other end of each of the plurality of adjusting arms 22 is connected with the other end of the first steel wire 16, one end of each of the plurality of fastening bolts 23 is movably penetrated through the fitting groove 5 and the adjusting groove 4, and each of the plurality of fastening nuts 24 is screwed on the fastening bolt 23 and fixed to the lower wall of the second mounting disc 21, and each of the plurality of electric sliding rails 25 is fixedly arranged on the lower wall of the other end of the adjusting arm 22; the second mounting disc 21 serves as a middle bearing base, and the diameter greater than that of the first mounting disc 11 provides sufficient installation and movement space for the adjusting arms 22 and the clamping structure 3 below, which is movably arranged below the first mounting disc 11 and can be tilted in multiple directions with the tension of the first steel wire 16; one end of the adjusting arm 22 is movably arranged on the upper wall of the second mounting disc 21, the fitting groove 5 in the middle part of the adjusting arm 22 communicates with the arc-shaped adjusting groove 4 on the second mounting disc 21, the fastening bolt 23 penetrates through the fitting groove 5 and the adjusting groove 4, and is locked by the fastening nut 24 on the lower wall of the second mounting disc 21 to realize the positioning and fixing of the adjusting arm 22 after swinging; when it is necessary to adjust the clamping direction, the fastening nut 24 can be loosened to make the adjusting arm 22 swing along the arc-shaped adjusting groove 4 with the movable connection point as the center, complete the adjustment of the included angle between the adjacent clamping structures 3, and lock the position after the adjustment is completed by tightening the fastening nut 24 again; the other end of the adjusting arm 22 is connected with the first steel wire 16 to directly receive the driving tension of the first control structure 1 and realize overall tilt adjustment; the electric sliding rail 25 is fixedly arranged on the lower wall of the other end of the adjusting arm 2 to bear and drive the clamping structure 3 to move linearly along the adjusting arm 22, complete flexible adjustment of the clamping width and position, the clamping structure 3 can adjust the clamping range through the electric sliding rail 25, the adjusting arm 22 can swing along the adjusting groove 4 of the second mounting disc 21, and the adjusting arm 22 is fixed by the fastening bolt 23 and the fastening nut 24, the first hydraulic cylinder body 15 is elongated to drive the adjusting arm 22 through the first steel wire 16 to realize the tilting of the clamped workpiece.

[0025] More specifically, the second control structure 2 takes the circular second mounting disc 21 as the central core bearing base, which has a larger diameter than the first mounting disc 11 and is suspended above the first mounting disc 11 to provide sufficient radial installation and movement space for the lower adjustment arm 22 and the clamping structure 3; one end of the adjustment arm 22 is hingedly connected to the upper wall of the second mounting disc 21 through a pin shaft, and the hinge point coincides with the center of the arc-shaped positioning slot 4 corresponding to the second mounting disc 21. The matching slot 5 in the middle of the one end of the adjustment arm 22 is connected with the arc-shaped positioning slot 4 above and below, and the fastening bolt 23 is sequentially threaded through the matching slot 5 and the positioning slot 4 from top to bottom, and the lower end of the fastening bolt 23 extends out of the lower wall of the second mounting disc 21 and is screwed with the fastening nut 24 to realize the rigid positioning of the adjustment arm 22 after swinging; the other end of the adjustment arm 22 is fixedly connected to the lower end of the corresponding first steel wire 16 in the first control structure 1, directly receiving the tension of the first steel wire 16; when it is necessary to adjust the clamping angle of the adjacent clamping structure 3 to adapt to the outer contour of the special-shaped workpiece, the fastening nut 24 below the corresponding adjustment arm 22 is loosened first, so that the adjustment arm 22 can swing along the track of the arc-shaped positioning slot 4 with the end hinge point as the center, and after the adjustment arm 22 is swung to the target angle and the clamping angle of the adjacent clamping structure 3 matches the workpiece contour, the fastening nut 24 is tightened again to realize the position locking of the adjustment arm 22 through the friction force of the fastening bolt 23 and the lower wall of the second mounting disc 21; when the first hydraulic cylinder body 15 of the first control structure 1 performs the extension and retraction action, the corresponding first steel wire 16 will directly pull the outer end of the adjustment arm 22 to move up and down, thereby driving the entire second mounting disc 21 and all the clamping structures 3 below to tilt synchronously, completing the adjustment of the workpiece hoisting posture; the electric sliding rail 25 is fixedly installed on the lower wall of the adjustment arm 22 along the length direction of the adjustment arm 22, and the upper end of the clamping structure 3 is fixedly connected with the sliding block of the electric sliding rail 25. The clamping structure 3 is driven by the sliding block of the electric sliding rail 25 to move radially and linearly along the adjustment arm 22, realizing stepless and continuous adjustment of the clamping radius and the clamping width, and accurately matching workpieces of different sizes.

[0026] As a preferred solution, further, the clamping structure 3 includes a support unit 31 and a force applying unit 32; the force applying unit 32 is fixedly arranged on the support unit 31.

[0027] As a preferred further, the supporting unit 31 comprises an adapter seat 311, a turnover arm 312, a plurality of clamping arms 313, a plurality of adjusting bolts 314, a plurality of adjusting nuts 315 and a damping spring body 316; the adapter seat 311 is fixedly arranged at one end of one of the electric sliding rails 25 and is driven to move along the adjusting arm 22 by the electric sliding rail 25, the middle part of the adapter seat 311 is provided with a wire groove 6, one end of the turnover arm 312 is movably embedded in the other end of the adapter seat 311, and the maximum included angle between the turnover arm 312 and the adapter seat 311 is 135 degrees, a plurality of adjusting holes are equidistantly arranged at the other end of the turnover arm 312, one end of each of the plurality of clamping arms 313 is equidistantly provided with the same adjusting hole as the turnover arm 312, and the other end of each of the clamping arms 313 has a different shape structure, one end of each of the clamping arms 313 is detachably arranged on the other end of the turnover arm 312, each of the adjusting bolts 314 is movably penetrated through the adjusting hole at the other end of the turnover arm 312 and the adjusting hole at one end of the clamping arm 313, each of the adjusting nuts 315 is screwed on the adjusting bolt 314 for fixing the turnover arm 312 and the clamping arm 313, and the damping spring body 316 is movably connected between the middle part of the side wall of the turnover arm 312 and the middle part of the side wall of the adapter seat 311, and is obliquely arranged; the adapter seat 311 is fixedly installed on the electric sliding rail 25 and can be integrally translated along the adjusting arm 22 with the electric sliding rail 25 to coarsely adjust the clamping position and the clamping width; the wire groove 6 in the middle part of the adapter seat 311 is used to provide a space for the second steel wire 323 to pass through and guide; one end of the turnover arm 312 is movably embedded in the adapter seat 311, and the maximum opening and closing angle between the two is 135 degrees, which can freely swing within a certain range to adapt to the inclination angle and curved profile of the outer wall of the workpiece, and the damping spring body 316 is obliquely connected between the turnover arm 312 and the adapter seat 311 to apply an elastic supporting force to the turnover arm 312 in normal state, keep the turnover arm 312 in an open state, and absorb vibration and impact during clamping and lifting; the clamping arm 313 is detachably installed at the end of the turnover arm 312 through the adjusting bolt 314 and the adjusting nut 315, the clamping arm 313 and the turnover arm 312 are positioned and connected through the corresponding adjusting holes, different structural shapes of the clamping arm 313 can be replaced according to the shape of the special-shaped workpiece to ensure that the clamping arm 313 is closely attached to the outer wall of the workpiece; the adjusting bolt 314 and the adjusting nut 315 are matched to realize the assembly and disassembly and position locking of the clamping arm 313.

[0028] More specifically, the support unit 31 is installed with a hub 311 as the core of the base, and the upper end is rigidly connected with the slider of the second control structure 2 electric sliding rail 25, which can be linearly translated along the length direction of the adjustment arm 22 with the electric sliding rail 25, realizing the coarse adjustment of the clamping position and the clamping width; the middle part of the hub 311 is provided with a through lead slot 6 along the length direction, which provides a dedicated space for the second steel wire 323 of the force applying unit 32 to pass through and guide, avoiding frictional interference with other components during the movement of the steel wire; one end of the turnover arm 312 is movably embedded in the inner cavity of the hub 311 away from the electric sliding rail 25 through a pin shaft, and the two form a hinged connection, and through the cooperation of the limiting stop on the inner cavity of the hub 311 and the pin shaft, the maximum opening angle of the turnover arm 312 relative to the hub 311 is limited to 135°, so that the turnover arm 312 can freely swing within the range of 0° to 135° to adapt to different inclination angles and curved profiles of the outer wall of the workpiece; the shock absorbing spring body 316 is arranged in an inclined state, and its two ends are movably hinged between the side wall of the turnover arm 312 and the side wall of the hub 311 through pin shafts, and in normal state, the shock absorbing spring body 316 is in a slightly stretched state, exerting an elastic support force outward on the turnover arm 312, so that the turnover arm 312 is stably kept at the maximum opening angle, reserving sufficient operating space for the workpiece to be placed into the clamping space; during the clamping action, the shock absorbing spring body 316 is compressed, which can absorb the rigid impact in the clamping moment, and can buffer the shaking and vibration of the workpiece during lifting and transporting, avoiding damage to the surface of the workpiece or loosening of the clamping due to impact; the other end of the turnover arm 312 is provided with a plurality of coaxial positioning holes equidistantly along the length direction, and the ends of the clamping arms 313 are also provided with positioning holes with the same diameter and pitch as those of the turnover arm 312, and the other ends of the clamping arms 313 are designed as various adaptive structures such as plane, arc surface, V-shaped surface and toothed surface according to the shape characteristics of different workpieces; when installing the clamping arm 313, the end is attached to the end face of the turnover arm 312, the position of the clamping arm 313 is adjusted to align the corresponding positioning holes, the adjusting bolt 314 is sequentially inserted into the aligned positioning holes from one side, and the adjusting nut 315 is screwed onto the protruding end of the adjusting bolt 314 and is tightened with a pre-tightening force, so that the clamping arm 313 and the turnover arm 312 are rigidly fixed; by selecting different aligned positioning holes, the total length of the clamping arm 313 protruding from the turnover arm 312 can be adjusted to realize the fine adjustment of the clamping depth; when different shaped workpieces need to be adapted, the adjusting nut 315 is loosened, the original clamping arm 313 is removed, and the corresponding shaped clamping arm 313 is replaced and locked again to complete the switching.

[0029] As a preferred solution, further, the force applying unit 32 comprises a second hydraulic cylinder body 321, a pair of second guide wheels 322 and a second steel wire 323; one end of the second hydraulic cylinder body 321 is fixedly penetrated through the middle part of one end of the adapter seat 311, one of the second guide wheels 322 is movably arranged in the middle part of the wire guide groove 6, and the other of the second guide wheels 322 is movably arranged on the lower wall of the turnover arm 312 below the shock absorbing spring body 316; one end of the second steel wire 323 is fixedly connected to the telescopic end of the second hydraulic cylinder body 321, and the other end of the second steel wire 323 is movably penetrated through the wire guide groove 6 of the adapter seat 311 and fixedly connected to the lower wall of the turnover arm 312 after being staggered guided by the two second guide wheels 322; the second hydraulic cylinder body 321 is fixedly installed on the middle part of one end of the adapter seat 311 to provide power for the clamping action; one end of the second steel wire 323 is connected to the telescopic end of the second hydraulic cylinder body 321, and the other end of the second steel wire 323 is penetrated through the wire guide groove 6 of the adapter seat 311 and finally fixedly connected to the lower wall of the turnover arm 312 after being diverted and guided by one of the second guide wheels 322 in the wire guide groove 6 and the other of the second guide wheels 322 on the lower wall of the turnover arm 312; when the second hydraulic cylinder body 321 is extended, the telescopic end of the second hydraulic cylinder body 321 pulls the second steel wire 323, and under the guidance of the two second guide wheels 322, the second steel wire 323 generates a downward pulling force on the turnover arm 312, driving the turnover arm 312 to turn and fold to one side of the adapter seat 311; when the second hydraulic cylinder body 321 is retracted, the pulling force disappears, and the elastic force of the shock absorbing spring body 316 pushes the turnover arm 312 to reset and open, thereby completing the clamping and loosening cycle, and the second hydraulic cylinder body 321 is extended to drive the turnover arm 312 to turn and compress the shock absorbing spring body 316 for clamping and fixing.

[0030] More specifically, when the clamping action is performed, the telescopic end of the second hydraulic cylinder body 321 extends outward, pulling the second steel wire 323 fixedly connected thereto to move in the direction of the hydraulic cylinder, and under the continuous guidance of the two second guide wheels 322, the pulling force of the second steel wire 323 is converted into an upward traction force on the lower wall of the turnover arm 312, driving the turnover arm 312 to turn and fold to one side to the adapter seat 311 with the hinge point of the adapter seat 311 as the center, while compressing the shock absorbing spring body 316 arranged obliquely, until the clamping arm 313 installed on the end of the turnover arm 312 tightly abuts the outer wall of the workpiece and applies a preset clamping force, completing the clamping and fixing of the workpiece; when the loosening action is performed, the telescopic end of the second hydraulic cylinder body 321 retracts inward, the pulling force of the second steel wire 323 gradually disappears, the compressed shock absorbing spring body 316 releases the elastic potential energy, pushing the turnover arm 312 to reverse and reset to the maximum open angle, the clamping arm 313 is out of contact with the outer wall of the workpiece, completing the loosening operation, and thus the continuous clamping and loosening of the workpiece is realized.

[0031] The detailed connection means is a well-known technology in the art, and the working principle and process are mainly introduced below. The specific work is as follows.

[0032] When the equipment is in use, the first control structure 1 is connected to the external lifting equipment through the hook of the top rod 12 to achieve overall suspension and lifting; the first mounting plate 11 serves as the upper base, and the first wheel seat 13 and the first guide wheel 14, which are arranged clockwise at equal intervals along its side wall, form a uniform guiding unit. When the first hydraulic cylinder body 15 extends or retracts, it pulls the corresponding first steel rope 16. After turning through the first guide wheel 14, it applies differentiated tension to the second control structure 2 below. Through the independent winding and unwinding of multiple sets of first steel ropes 16, the second control structure 2 is controlled to achieve multi-directional and multi-angle tilt posture adjustment to adapt to the center of gravity and lifting angle requirements of irregular workpieces. In the second adjustment structure 2, the second mounting plate 21 serves as the central bearing base. Its arc-shaped adjustment groove 4 cooperates with the matching groove 5 of the adjustment arm 22. The fastening bolt 23 and the fastening nut 24 can realize the positioning and locking after the adjustment arm 22 swings, thereby adjusting the included angle between adjacent clamping structures 3 to match the outer periphery of the irregular workpiece. The other end of the adjustment arm 22 is connected to the first steel rope 16 to receive the tilt adjustment power. The electric slide rail 25 is located on the lower wall of the adjustment arm 22 and can drive the clamping structure 3 to move linearly along the adjustment arm 22, flexibly changing the clamping width and radial position. The clamping structure 3 is divided into a support unit 31 and a force application unit 32. In the support unit 31, the adapter 311 is fixedly connected to the electric slide rail 25, and the flipping arm 312 is movably embedded in the adapter 311 with a maximum opening angle of 135 degrees. The shock-absorbing spring body 316 is inclinedly connected between the flipping arm 312 and the adapter 311, and remains open and provides cushioning under normal conditions. The clamping arm 313 is detachably installed at the end of the flipping arm 312 through the adjusting bolt 314 and the adjusting nut 315, and can be changed to adapt the shape according to the workpiece shape to ensure a tight fit. In the force application unit 32, the second hydraulic cylinder body 321 is fixed to the adapter seat 311. One end of the second steel rope 323 is connected to the telescopic end of the second hydraulic cylinder body 321. After being guided by two second guide wheels 322 on the lower wall of the tilting arm 312 in the wire guide groove 6, it is fixed to the tilting arm 312. When the second hydraulic cylinder body 321 extends, the second steel rope 323 pulls the tilting arm 312 to tilt inward and retract, thus completing the workpiece clamping. When the second hydraulic cylinder body 321 retracts, the shock-absorbing spring body 316 pushes the tilting arm 312 to reset and open, thereby releasing the workpiece. During the lifting process, the clamping structure 3 is moved by the electric slide rail 25 to fit the outer surface of the workpiece. The workpiece is subjected to force by the flipping of the clamping arm 313 to achieve clamping stability. At the same time, the clamping structure 3 can also be moved by the adjusting arm 22 to fit the irregular outer wall of the workpiece. Then, the first control structure 1 is connected to the lifting device to lift and raise the workpiece. After lifting, the first hydraulic cylinder body 15 can be extended and retracted, thereby driving the second mounting plate 21 and the clamping structure 3 to tilt in multiple directions through the first steel rope 16.

[0033] In summary, the present application can complete the multi-freedom attitude adjustment of special-shaped workpieces, flexible clamping and stable lifting, and can adapt to the lifting operation of various irregular shapes and conventional workpieces.

[0034] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A multi-degree-of-freedom adjustable crane lifting device suitable for irregularly shaped workpieces, characterized in that, It includes a first control structure (1), a second control structure (2), and several clamping structures (3); the second control structure (2) is movably disposed below the first control structure (1), and several clamping structures (3) are equidistantly disposed on the second control structure (2), and the clamping structures (3) are arranged in a clockwise direction; The first control structure (1) is used to connect with the hoisting equipment, and the first control structure (1) can adjust the second control structure (2) to tilt in multiple directions. The second control structure (2) is used to support multiple clamping structures (3), and the second control structure (2) can adjust the relative spacing of the clamping structures (3). Several clamping structures (3) are arranged clockwise to form multiple directions of synchronous force for clamping. The position and spacing of the second control structure (2) can be adjusted to fit the lifting of irregular or normal shaped workpieces.

2. The multi-degree-of-freedom adjustable crane lifting device suitable for irregularly shaped workpieces according to claim 1, characterized in that, The first control structure (1) includes a first mounting plate (11), a boom (12), a plurality of first wheel seats (13), a plurality of first guide wheels (14), a plurality of first hydraulic cylinder bodies (15), and a plurality of first steel ropes (16). The first mounting plate (11) is circular. One end of the boom (12) is fixedly connected to the middle of the upper wall of the first mounting plate (11), and the other end of the boom (12) is provided with a hanging hole. One end of several first wheel seats (13) is equidistantly arranged on the side wall of the first mounting plate (11) and arranged clockwise. Several first guide wheels (14) are movably arranged on the other end of the first wheel seats (13). One end of several first hydraulic cylinder bodies (15) is fixedly inserted through the first mounting plate (11), and the first hydraulic cylinder bodies (15) are respectively corresponding to the first guide wheels (14). One end of several first steel ropes (16) is fixedly connected to the telescopic end of the first hydraulic cylinder body (15), and the other end of several first steel ropes (16) is guided downward through the first guide wheels (14).

3. A multi-degree-of-freedom adjustable crane lifting device suitable for irregularly shaped workpieces according to claim 2, characterized in that, The second control structure (2) includes a second mounting plate (21), several adjusting arms (22), several fastening bolts (23), several fastening nuts (24), and several electric slide rails (25). The second mounting plate (21) is circular, and its diameter is larger than that of the first mounting plate (11). The second mounting plate (21) is movably disposed below the first mounting plate (11). The second mounting plate (21) is provided with several arc-shaped adjustment grooves (4) at equal intervals. One end of several adjustment arms (22) is movably disposed on the upper wall of the second mounting plate (21), and the movable connection part of the adjustment arm (22) corresponds to the middle of the adjustment groove (4). The middle of one end of several adjustment arms (22) Each has a fitting groove (5) and the fitting groove (5) can communicate with the adjustment groove (4). The other end of each of the adjustment arms (22) is connected to the other end of the first steel rope (16). One end of each of the fastening bolts (23) passes through the fitting groove (5) and the adjustment groove (4). Each of the fastening nuts (24) is screwed onto the fastening bolts (23) and fixed to the lower wall of the second mounting plate (21). Each of the electric slide rails (25) is fixedly installed on the lower wall of the other end of the adjustment arm (22).

4. A multi-degree-of-freedom adjustable crane lifting device suitable for irregularly shaped workpieces according to claim 3, characterized in that, The clamping structure (3) includes a support unit (31) and a force application unit (32); the force application unit (32) is fixedly mounted on the support unit (31).

5. A multi-degree-of-freedom adjustable crane lifting device suitable for irregularly shaped workpieces according to claim 4, characterized in that, The support unit (31) includes an adapter (311), a flipping arm (312), several clamping arms (313), several adjusting bolts (314), several adjusting nuts (315), and a shock-absorbing spring body (316). One end of the adapter (311) is fixedly mounted on one of the electric slide rails (25) and moves along the adjusting arm (22) via the electric slide rails (25). A wire groove (6) is provided in the middle of the adapter (311). One end of the flipping arm (312) is movably embedded in the other end of the adapter (311), and the maximum angle between the flipping arm (312) and the adapter (311) is 135 degrees. Several adjustment holes are equidistantly arranged on the other end of the flipping arm (312). Several clamping arms (313) have the same adjustment holes as the flipping arm (312) equidistantly arranged on one end, and the other end of the clamping arms (313) is... With different shapes and structures, one end of each of the clamping arms (313) is detachably mounted on the other end of the flipping arm (312). Each of the adjusting bolts (314) is movably inserted through the adjusting hole at the other end of the flipping arm (312) and the adjusting hole at one end of the clamping arm (313). Each of the adjusting nuts (315) is screwed onto the adjusting bolts (314) to fix the flipping arm (312) and the clamping arm (313). The two ends of the shock-absorbing spring body (316) are movably connected between the middle of the side wall of the flipping arm (312) and the middle of the side wall of the adapter (311), and the shock-absorbing spring body (316) is inclined.

6. A multi-degree-of-freedom adjustable crane lifting device suitable for irregularly shaped workpieces according to claim 5, characterized in that, The force application unit (32) includes a second hydraulic cylinder body (321), a pair of second guide wheels (322), and a second steel rope (323); One end of the second hydraulic cylinder body (321) is fixedly inserted through the middle of one end of the adapter seat (311). One of the second guide wheels (322) is movably disposed in the middle of the wire guide groove (6), and the other second guide wheel (322) is movably disposed on the lower wall of the middle part of the tilting arm (312) and located below the shock-absorbing spring body (316). One end of the second steel rope (323) is fixedly connected to the telescopic end of the second hydraulic cylinder body (321), and the other end of the second steel rope (323) is movably inserted through the wire guide groove (6) and is fixedly connected to the lower wall of the tilting arm (312) after being guided by the two second guide wheels (322).

7. A multi-degree-of-freedom adjustable crane lifting device suitable for irregularly shaped workpieces according to claim 6, characterized in that, The second hydraulic cylinder body (321) extends and drives the second steel rope (323) to pull the flipping arm (312) to flip and compress the shock-absorbing spring body (316) for clamping and fixing.

8. A multi-degree-of-freedom adjustable crane lifting device suitable for irregularly shaped workpieces according to claim 7, characterized in that, The clamping structure (3) can adjust the clamping range via the electric slide rail (25) main body.

9. A multi-degree-of-freedom adjustable crane lifting device suitable for irregularly shaped workpieces according to claim 7, characterized in that, The adjusting arm (22) can swing along the adjusting groove (4) on the second mounting plate (21), and the adjusting arm (22) is fixed to the fastening nut (24) by the fastening bolt (23).

10. A multi-degree-of-freedom adjustable crane lifting device suitable for irregularly shaped workpieces according to claim 7, characterized in that, The first hydraulic cylinder body (15) extends and drives the adjusting arm (22) through the first steel rope (16) to achieve the tilting of the clamped workpiece.

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