Turnover type hoisting clamp for round bar machining

Abstract

The invention relates to a turnover type hoisting clamp for round bar machining, and belongs to the technical field of hoisting clamps. Comprising a stand column, a hanging bracket is fixedly arranged at the lower end of the stand column, connecting frames are arranged on the two sides of the lower end of the hanging bracket respectively, an outer clamp frame and an inner clamp frame are slidably hinged to the two connecting frames respectively, the outer clamp frame and the inner clamp frame are connected through a telescopic assembly, and the outer clamp frame is connected with the stand column through a lifting assembly. The lower end of the outer clamp frame and the lower end of the inner clamp frame are each provided with a clamping and overturning assembly, and each clamping and overturning assembly comprises a rotatable clamping jaw. The problem that round bars need to be transferred and overturned through two steps at present is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of hoisting fixtures, and in particular relates to a reversible hoisting fixture for processing round bar materials. Background Art

[0002] Wind turbine flanges are large annular flanges with various sizes ranging from 3.5 meters in diameter to 8 meters in diameter. They are important components that are indispensable for connecting wind turbine towers. Their raw materials are mainly round bars of various sizes such as φ650, φ700, φ800, and φ900. After these round bars of various sizes enter the factory, they are sawn into several small sections and transported in parallel to the heating furnace. They need to be erected and heated in the heating furnace, which requires horizontal parallel transportation and flipping to an upright position. Previously, we first used a crane to lift them to the designated heating furnace, and then used a material reclaimer to flip them upright before sending them to the heating furnace. It takes a long time to complete these two processes, requires more equipment, and requires more operators, resulting in low efficiency. Therefore, improvements need to be made based on the above problems. Summary of the invention

[0003] The invention overcomes the shortcomings of the prior art and provides a reversible hoisting fixture for round bar material processing, thereby solving the problem that two steps are required to transport and reverse the round bar material.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions.

[0005] A flippable lifting fixture for processing round bar materials comprises a column, a hanger is fixedly arranged at the lower end of the column, a connecting frame is respectively arranged on both sides of the lower end of the hanger, an outer clamp frame and an inner clamp frame are respectively slidably hinged on the two connecting frames, the outer clamp frame is connected to the inner clamp frame by a telescopic component, and the outer clamp frame is connected to the column by a lifting component, and a clamping and flipping component is respectively arranged at the lower end of the outer clamp frame and the inner clamp frame, and the clamping and flipping component comprises a rotatable clamping claw.

[0006] Furthermore, the hanger includes two front-to-back symmetrical triangular plates, the upper ends of the two triangular plates are fixedly connected to the lower end of the column; a first hinged rod is fixedly arranged between the two left corners and between the two right corners of the lower ends of the two triangular plates; the two ends of the connecting frame are respectively provided with a first waist-shaped groove and a second waist-shaped groove, and the first waist-shaped grooves on the upper sides of the two connecting frames are respectively slidably connected to the outer sides of the two first hinged rods of the hanger.

[0007] Furthermore, the inner clamp frame and the outer clamp frame are mutually crossed X-shaped structures, and the inner clamp frame is located on the inner side of the outer clamp frame; the inner clamp frame includes two inner clamp frame plates that are symmetrical in front and back, and the upper ends of the two inner clamp frame plates are fixedly connected by a second hinge rod, and the clamping and flipping assembly is arranged between the lower ends of the two inner clamp frame plates, and the second hinge rod is slidably inserted into the second waist-shaped groove of the left connecting frame; The outer clamp frame includes two front-to-back symmetrical outer clamp frame plates, the upper ends of the two outer clamp frame plates are fixedly connected by a third hinge rod, the clamping and flipping assembly is arranged between the lower ends of the two outer clamp frame plates, and the third hinge rod is slidably inserted into the second waist-shaped groove of the right connecting frame.

[0008] Furthermore, the telescopic assembly includes a connecting tube and a connecting shaft; one end of the connecting shaft is rotatably set in the middle of the inner clamp frame, and one end of the connecting tube is rotatably set in the middle of the outer clamp frame, and the end of the connecting shaft away from the inner clamp frame is slidably inserted into the opening of the end of the connecting tube away from the outer clamp frame; a spline groove is provided on the inner wall of the connecting tube, and a spline sleeve is fixedly provided at the end of the connecting shaft away from the inner clamp frame, and the spline sleeve is slidably inserted into the spline groove.

[0009] Furthermore, the lifting assembly includes an inverted T-shaped box, a hanging shaft, and a blocking block; the inverted T-shaped box includes a vertical section and a horizontal section, the horizontal section is horizontally arranged along the left and right directions, and the lower end of the vertical section is connected to the middle part of the horizontal section; the upper end of the vertical section of the inverted T-shaped box is fixedly arranged in the middle part of the inner side of the hanger; a sliding hole is arranged in the middle part of the bottom plate of the horizontal section of the inverted T-shaped box, and the sliding hole corresponds to the vertical section on the upper side; a vertical hanging shaft is slidably inserted in the vertical section of the inverted T-shaped box, the upper end of the hanging shaft is slidably inserted in the interior of the column, and the lower end of the hanging shaft The lever extends through the sliding hole to the outside of the inverted T-shaped box; a vertical pull groove is provided on the side wall of the column; a horizontal pull rod is fixedly provided on the upper end of the outer side surface of the hanging shaft, the pull rod passes through the pull groove on the column and extends to the outside of the column; an inner sliding opening that passes through the left and right is provided at the lower end of the hanging shaft, and the length direction of the inner sliding opening is provided along the vertical direction; a locking block is fixedly provided on one side of the outer side surface of the hanging shaft close to the lower end, and the locking block is a conical structure that is thin at the top and thick at the bottom, and a conical locking groove that is thin at the top and thick at the bottom is provided on the lower end surface of the locking block.

[0010] Furthermore, the lifting assembly also includes a wedge block, a connecting rod, a first spring, and an adjusting nut; a wedge block is slidably arranged on both sides of the horizontal section of the inverted T-shaped box, and the two wedge blocks are symmetrically arranged on the left and right sides of the suspension shaft; the end faces of the two wedge blocks on one side close to each other are respectively acting inclined surfaces, the upper edges of the acting inclined surfaces on the two wedge blocks are close to each other and the lower edges are away from each other; a connecting rod is fixedly arranged at the ends of the two wedge blocks that are away from each other, and an external thread is arranged on the outer side of the end of the connecting rod that is away from the wedge block; a first spring is respectively sleeved on the outer side of each connecting rod, the first spring is located on the inner side of the horizontal section of the inverted T-shaped box, one end of the first spring is connected to the wedge block, and the other end of the first spring is connected to the inner wall of the horizontal section of the inverted T-shaped box; a mounting tube is fixedly arranged at both ends of the horizontal section of the inverted T-shaped box, and the ends of the connecting rods on both sides that are away from the wedge block respectively pass through the mounting tube on the same side and extend to the outside of the mounting tube; an adjusting nut is rotatably arranged at the ends of the two mounting tubes that are away from each other, and the adjusting nut is screwed on the outer side of the connecting rod on the same side.

[0011] Furthermore, the lifting assembly also includes a slide tube, a clamping block, and a sliding block. A slide tube is slidably sleeved on the outer side of the lower end of the hanging shaft, and an outer sliding mouth that passes through the left and right is arranged on the side wall of the slide tube. The outer sliding mouth corresponds to the inner sliding mouth, and the clamping block is inserted into the inner sliding mouth and the outer sliding mouth; the lower end of the slide tube is hinged to the middle part of the inner clamp frame, and a circular ring-shaped sliding block is fixedly arranged at the upper end opening of the slide tube. The sliding block is sleeved on the outer side of the hanging shaft, and the upper and lower ends of the outer side surface of the sliding block are both conical structures. The conical surface of the upper end remains thin at the top and thick at the bottom, and the conical surface of the lower end remains thick at the top and thin at the bottom.

[0012] Furthermore, the clamping and flipping assembly also includes a fixed box, a clamping block, a rotating shaft, a limit plate, a counterweight, and a third spring; a fixed box is fixedly arranged at the lower ends of the inner clamp frame and the outer clamp frame respectively; a rotating hole that passes through the fixed box is arranged in the middle of the fixed box, and a rotating shaft is slidably inserted in the rotating hole, and the rotating shaft can rotate in the rotating hole; a clamping claw is fixedly arranged at one end of the rotating shaft facing the other side of the clamping and flipping assembly, and a limit plate is fixedly arranged at one end of the rotating shaft away from the other side of the clamping and flipping assembly, and the clamping claw and the limit plate are respectively located on the left and right sides of the fixed box; a third spring is sleeved on the outer side of the rotating shaft, the third spring is located on the side of the fixed box away from the limit plate, and the two ends of the third spring are respectively connected to the clamping claw and the fixed box; the clamping claw is a cubic structure, and an arc-shaped clamping groove is arranged at one end of the clamping claw close to the other side of the clamping and flipping assembly, and the axis of the clamping groove is horizontally arranged along the front-back direction; a counterweight is fixedly arranged at the lower end of the clamping claw.

[0013] Furthermore, the clamping and flipping assembly also includes a limit box, a fourth spring, a limit block, and a positioning plate. A positioning plate is fixedly arranged on one end of the outer side of the rotating shaft close to the clamping claw, and the positioning plate is located on the inner side of the third spring. The positioning plate is a circular ring-shaped plate structure located in the front and rear vertical planes, and a circular ring-shaped annular groove is arranged on the end face of one side of the positioning plate close to the fixed box, and a positioning opening is respectively arranged at the front and rear ends of the annular groove; a circular ring-shaped limit box is fixedly arranged on one end of the fixed box close to the clamping claw, and the limit box is located on the outer side of the rotating shaft; a hollow limit groove is respectively arranged on the inner sides of the upper and lower ends of the limit box, and an opening is arranged at one end of the limit groove close to the clamping claw; a fourth spring is arranged inside the limit groove, and a limit block is slidably inserted into the opening of the limit groove, and the two ends of the fourth spring are respectively fixedly connected to the limit block and the inner wall of the limit groove.

[0014] Furthermore, a leveling assembly is respectively provided at the lower end of each fixed box, and the leveling assembly includes a T-block, a storage cylinder, a leveling rod, a rubber wheel, and a second spring; a T-slot is provided at the lower end of the fixed box, and the T-slot extends along the front-rear horizontal direction, and a T-block is slidably provided inside the T-slot; two front and rear vertical storage cylinders are fixedly provided at the lower end of the T-block, and the lower ends of the storage cylinders remain open; the upper ends of the two leveling rods are respectively inserted upward into the inside of the two storage cylinders, and the lower ends of the two leveling rods are respectively rotatably provided with a rubber wheel; a second spring is respectively provided at the inner upper end of each storage cylinder, and the upper and lower ends of the second spring are respectively fixedly connected to the inner top surface of the storage cylinder and the upper end of the leveling rod.

[0015] The beneficial effects of the present invention compared with the prior art are as follows: The present invention facilitates the flipping of the workpiece while clamping it through the cooperation of the rotating shaft and the clamping jaws, thereby improving production efficiency; through the cooperation of the outer clamp frame and the inner clamp frame, the clamping jaws can automatically clamp the workpiece using the lever principle, and the workpiece is clamped more tightly as it goes up, thereby improving safety and stability; through the cooperation of the limit block and the positioning plate, the workpiece will not shake during the movement after being flipped from the horizontal direction to the vertical direction, thereby improving the stability of the lifting fixture; through the cooperation of the connecting frame and the hanging shaft, the distance between the outer clamp frame and the inner clamp frame can be expanded, thereby facilitating the clamping of workpieces with larger diameters and improving the efficiency of clamping workpieces; the device turns the two processes of lifting and flipping round bar materials into one process, thereby reducing auxiliary equipment and operators, shortening time, reducing labor intensity, increasing safety, stability and reliability, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings: Figure 1 It is a three-dimensional schematic diagram of the present invention as a whole; Figure 2It is a three-dimensional schematic diagram after cutting of the present invention; Figure 3 It is a three-dimensional schematic diagram of the lifting assembly; Figure 4 It is a schematic diagram of the internal structure of the lifting assembly; Figure 5 It is a partial structural schematic diagram of the lifting assembly; Figure 6 This is the connection diagram of the clamping and flipping components and the leveling components. Figure 1 ; Figure 7 It is a schematic diagram of the internal structure of the leveling component; Figure 8 It is a schematic diagram of the structure of the clamping and flipping assembly after half-section; Fig. 9 This is the connection diagram of the clamping and flipping components and the leveling components. Figure 2 ; Fig.10 This is the connection diagram of the clamping and flipping components and the leveling components. Figure 3 ; Fig.11 It is a schematic diagram of the positions of the two positioning ports on the positioning plate; Fig.12 yes Figure 8 A local enlarged schematic diagram of the middle A; Among them, 1 is a column, 2 is a connecting seat, 3 is a lifting ring, 4 is a hanger, 5 is a fixing plate, 6 is a connecting frame, 7 is an outer clamp frame, 8 is an inner clamp frame, 9 is a connecting cylinder, 10 is a connecting shaft, 11 is a spline sleeve, 12 is an inverted T-shaped box, 13 is a hanging shaft, 14 is a positioning block, 15 is a sliding cylinder, 16 is a clamping block, 17 is a slider, 18 is a wedge block, 19 is a connecting rod, 20 is a first spring, 21 is an adjusting screw nut, 22 is a fixed box, 23 is a clamping block, 24 is an internal thread groove, 25 is a T-block, 26 is a storage tube, 27 is a leveling rod, 28 is a rubber wheel, 29 is a second spring, 30 is a rotating shaft, 31 is a limit plate, 32 is a clamping claw, 33 is a counterweight block, 34 is a third spring, 35 is a limit box, 36 is a fourth spring, 37 is a limit block, 38 is a positioning plate, 39 is an annular slide groove, and 40 is a positioning port. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0018] like Figure 1As shown in FIG. 12 , the present invention provides a flippable lifting fixture for processing round bar materials, comprising a column 1, a hanger 4 is fixedly arranged at the lower end of the column 1, a connecting frame 6 is respectively arranged on both sides of the lower end of the hanger 4, an outer clamp frame 7 and an inner clamp frame 8 are respectively slidably hinged on the two connecting frames 6, the outer clamp frame 7 and the inner clamp frame 8 are connected by a telescopic assembly, and the outer clamp frame 7 is connected to the column 1 by a lifting assembly, and a clamping and flipping assembly is respectively arranged at the lower end of the outer clamp frame 7 and the inner clamp frame 8, and the clamping and flipping assembly includes a rotatable jaw 32.

[0019] The column 1 is a vertically arranged rod-shaped structure, and a connecting seat 2 is rotatably arranged at the upper end of the column 1. A lifting ring 3 is fixedly arranged at the upper end of the connecting seat 2. By connecting the lifting equipment with the lifting ring 3, the entire lifting fixture can be lifted.

[0020] The hanger 4 includes two front-to-back symmetrical triangles, the lower ends of which are kept horizontal; both triangles are isosceles triangle structures, and both are located in the vertical plane in the left-right direction. The left and right sides of the two triangles are fixedly connected by a fixing plate 5, so that the two triangles are fixedly connected. The upper ends of the two triangles are fixedly connected to the lower end of the column 1; a first hinge rod is fixedly set between the two left corners and the two right corners of the lower ends of the two triangles.

[0021] The connecting frame 6 is a straight rod-shaped structure, and a first waist-shaped groove and a second waist-shaped groove are respectively provided at both ends of the connecting frame 6, and the length direction of the first waist-shaped groove and the second waist-shaped groove are both provided along the length direction of the connecting frame 6. The first waist-shaped grooves on the upper sides of the two connecting frames 6 are close to each other, and the second waist-shaped grooves on the lower sides of the two connecting frames 6 are far away from each other, and the first waist-shaped grooves of the two connecting frames 6 are respectively slidably sleeved on the outer sides of the two first hinged rods of the hanger 4.

[0022] The inner clamp frame 8 and the outer clamp frame 7 are X-shaped structures that intersect each other.

[0023] The inner clamp frame 8 includes two inner clamp frame plates that are symmetrical in front and back, and the inner clamp frame plates are curved rod-shaped structures located in the left and right vertical planes. The upper ends of the two inner clamp frame plates are fixedly connected by a second hinge rod, and the clamping and flipping assembly is arranged between the lower ends of the two inner clamp frame plates. The two inner clamp frame plates are also fixedly connected by an L-shaped seat. The second hinge rod is slidably inserted into the second waist-shaped groove of the left connecting frame 6.

[0024] The outer clamp frame 7 includes two front-to-back symmetrical outer clamp frame plates, which are curved rod-shaped structures located in the left and right vertical planes. The upper ends of the two outer clamp frame plates are fixedly connected by a third hinge rod, and the clamping and flipping assembly is arranged between the lower ends of the two outer clamp frame plates. The two outer clamp frame plates are also fixedly connected by an L-shaped seat. The third hinge rod is slidably inserted into the second waist-shaped groove of the right connecting frame 6.

[0025] The inner clamp frame 8 is located on the inner sides of the two outer clamp frame plates of the outer clamp frame 7 .

[0026] The telescopic assembly includes a connecting tube 9 and a connecting shaft 10. One end of the connecting shaft 10 is rotatably arranged in the middle of the inner clamp frame 8, and one end of the connecting tube 9 is rotatably arranged in the middle of the outer clamp frame 7. The end of the connecting shaft 10 away from the inner clamp frame 8 is slidably inserted into the opening of the end of the connecting tube 9 away from the outer clamp frame 7. A spline groove is arranged on the inner wall of the connecting tube 9, and a spline sleeve 11 is fixedly arranged at the end of the connecting shaft 10 away from the inner clamp frame 8, and the spline sleeve 11 is slidably inserted into the spline groove.

[0027] The lifting assembly includes an inverted T-shaped box 12 , a hanging shaft 13 , a positioning block 14 , a slide cylinder 15 , a clamping block 16 , a sliding block 17 , a wedge block 18 , a connecting rod 19 , a first spring 20 , and an adjusting nut 21 .

[0028] The inverted T-shaped box 12 is a hollow inverted T-shaped box structure, and the inverted T-shaped box 12 includes a vertical section and a horizontal section, and the horizontal section is horizontally arranged along the left and right direction, and the lower end of the vertical section is connected to the middle of the horizontal section. The upper end of the vertical section of the inverted T-shaped box 12 is fixedly arranged at the inner middle of the hanger 4. A sliding hole is arranged in the middle of the bottom plate of the horizontal section of the inverted T-shaped box 12, and the sliding hole corresponds to the upper vertical section.

[0029] A vertical suspension shaft 13 is slidably inserted inside the vertical section of the inverted T-shaped box 12. The upper end of the suspension shaft 13 is slidably inserted inside the column 1, and the lower end of the suspension shaft 13 extends through the sliding hole to the outside of the inverted T-shaped box 12. A vertical pull groove is provided on the side wall of the column 1, and a horizontal pull rod is fixedly provided on the upper end of the outer surface of the suspension shaft 13. The pull rod passes through the pull groove on the column 1 and extends to the outside of the column 1. By operating the pull rod, the suspension shaft 13 can be controlled to rise and fall inside the column 1. An inner side sliding opening that passes through the left and right is provided at the lower end of the suspension shaft 13, and the length direction of the inner side sliding opening is provided along the vertical direction. A positioning block 14 is fixedly provided on one side of the outer side surface of the suspension shaft 13 near the lower end. The positioning block 14 is a conical structure with a thin top and a thick bottom. A conical positioning groove with a thin top and a thick bottom is provided on the lower end surface of the positioning block 14.

[0030] A wedge block 18 is slidably arranged on both sides of the horizontal section of the inverted T-shaped box 12, and the two wedge blocks 18 are symmetrically arranged on the left and right sides of the suspension shaft 13; the wedge block 18 is a cubic structure, and the end faces of the two wedge blocks 18 on one side close to each other are respectively the action inclined surfaces, and the upper edges of the action inclined surfaces on the two wedge blocks 18 are close to each other and the lower edges are far away from each other. A connecting rod 19 is fixedly arranged at the ends of the two wedge blocks 18 that are far away from each other, and the connecting rod 19 is horizontally arranged along the left and right directions, and the outer side of the end of the connecting rod 19 away from the wedge block 18 is provided with an external thread. A first spring 20 is sleeved on the outer side of each connecting rod 19, and the first spring 20 is located on the inner side of the horizontal section of the inverted T-shaped box 12. One end of the first spring 20 is connected to the wedge block 18, and the other end of the first spring 20 is connected to the inner wall of the horizontal section of the inverted T-shaped box 12. A mounting tube is fixedly disposed at both ends of the horizontal section of the inverted T-shaped box 12. The mounting tube is a cylindrical structure with both ends penetrated. The mounting tube is horizontally disposed along the left-right direction and is connected to the inside of the horizontal section of the inverted T-shaped box 12. The ends of the connecting rods 19 on both sides away from the wedge 18 pass through the mounting tubes on the same side and extend to the outside of the mounting tubes. An adjusting nut 21 is rotatably disposed at the ends of the two mounting tubes away from each other. The adjusting nut 21 is screwed to the outside of the connecting rod 19 on the same side. By rotating the adjusting nut 21, the position of the connecting rod 19 and the wedge 18 inside the horizontal section of the inverted T-shaped box 12 can be adjusted.

[0031] A slide tube 15 is slidably sleeved on the outer side of the lower end of the hanging shaft 13, and an outer sliding opening that passes through the left and right is set on the side wall of the slide tube 15. The outer sliding opening corresponds to the inner sliding opening. The clamping block 16 is inserted into the inner sliding opening and the outer sliding opening, and the hanging shaft 13 is connected to the slide tube 15 through the clamping block 16. The lower end of the slide tube 15 is hinged to the middle part of the inner clamp frame 8, and the hinge axis of the lower end of the slide tube 15 is horizontally set along the front-back direction. A circular slider 17 is fixedly set at the upper end opening of the slide tube 15, and the slider 17 is sleeved on the outer side of the hanging shaft 13. The upper and lower ends of the outer side surface of the slider 17 are conical structures. The cone surface at the upper end is kept thin at the top and thick at the bottom, and the cone surface at the lower end is kept thick at the top and thin at the bottom.

[0032] The clamping and flipping components arranged at the lower ends of the inner clamp frame 8 and the outer clamp frame 7 are arranged symmetrically.

[0033] The clamping and flipping assembly also includes a fixing box 22 , a clamping block 23 , a rotating shaft 30 , a limiting plate 31 , a counterweight block 33 , a third spring 34 , a limiting box 35 , a fourth spring 36 , a limiting block 37 , and a positioning plate 38 .

[0034] A fixing box 22 is fixedly provided at the lower end of the inner clamp frame 8 and the outer clamp frame 7. The fixing box 22 is a cubic structure, and a row of vertically arranged blocks 23 are respectively provided on the front and rear side end faces of the fixing box 22, and an internal thread groove 24 is provided on the outer end face of the middle block 23. A row of vertically arranged mounting holes is fixedly provided at the lower end of the end faces of one side of the two inner clamp frame plates close to each other, and the front and rear rows of mounting holes are respectively sleeved on the outer sides of the front and rear rows of blocks 23 of the fixing box 22 on the right side, and the front and rear fixing bolts are respectively screwed into the inner thread grooves 24 of the front and rear middle blocks 23, thereby fixing the fixing box 22 on the right side to the inner clamp frame plate. A row of vertically arranged mounting holes is fixedly provided at the lower end of the end surfaces of one side where the two outer clamp frame plates are close to each other, and the front and rear rows of mounting holes are respectively sleeved on the outer sides of the front and rear rows of blocks 23 of the left fixed box 22, and the front and rear fixing bolts are respectively screwed into the internal thread grooves 24 of the front and rear middle blocks 23, thereby fixing the left fixed box 22 to the outer clamp frame plate.

[0035] A rotating hole that passes through the fixed box 22 is provided in the middle part, and a rotating shaft 30 is slidably inserted in the rotating hole, and the rotating shaft 30 can rotate in the rotating hole. A clamping claw 32 is fixedly provided at one end of the rotating shaft 30 that clamps the flip assembly on the other side, and a limiting plate 31 is fixedly provided at one end of the rotating shaft 30 that is away from the other side of the clamping flip assembly. The clamping claw 32 and the limiting plate 31 are respectively located on the left and right sides of the fixed box 22. A third spring 34 is sleeved on the outer side of the rotating shaft 30, and the third spring 34 is located on the side of the fixed box 22 away from the limiting plate 31. The two ends of the third spring 34 are respectively connected to the clamping claw 32 and the fixed box 22. Under the action of the rebound force of the third spring 34, the limiting plate 31 is connected to the fixed box 22, and the distance between the clamping claw 32 and the fixed box 22 is kept at the maximum.

[0036] The clamping jaw 32 is a cubic structure, and an arc-shaped clamping groove is provided at one end of the clamping jaw 32 close to the other side of the clamping flip assembly, and the axis of the clamping groove is horizontally arranged along the front-back direction. A counterweight block 33 is fixedly arranged at the lower end of the clamping jaw 32, and the counterweight block 33 is used to ensure that the clamping jaw 32 always remains vertical without being affected by external forces.

[0037] A positioning plate 38 is fixedly provided on one end of the outer side surface of the rotating shaft 30 close to the clamping claw 32. The positioning plate 38 is located on the inner side of the third spring 34. The positioning plate 38 is a circular ring-shaped plate structure located in the front and rear vertical planes. A circular ring-shaped annular groove 39 is provided on the end surface of one side of the positioning plate 38 close to the fixed box 22, and a positioning port 40 is respectively provided at the front and rear ends of the annular groove 39.

[0038] A circular limit box 35 is fixedly arranged at one end of the fixed box 22 near the clamping claw 32, and the limit box 35 is located outside the rotating shaft 30. A hollow limit groove is respectively arranged inside the upper and lower ends of the limit box 35, and the axis of the limit groove is arranged horizontally along the left and right direction, and an opening is arranged at one end of the limit groove near the clamping claw 32. A fourth spring 36 is arranged inside the limit groove, and a limit block 37 is slidably inserted inside the opening of the limit groove, and the two ends of the fourth spring 36 are respectively fixedly connected to the limit block 37 and the inner wall of the limit groove.

[0039] A leveling assembly is provided at the lower end of each fixed box 22, and the leveling assembly includes a T-block 25, a storage tube 26, a leveling rod 27, a rubber wheel 28, and a second spring 29. A T-slot is provided at the lower end of the fixed box 22, and the T-slot extends along the front-back horizontal direction, and a T-block 25 is slidably provided inside the T-slot. Two front and back vertical storage tubes 26 are fixedly provided at the lower end of the T-block 25, and the lower end of the storage tube 26 remains open. The upper ends of the two leveling rods 27 are respectively inserted upward into the two storage tubes 26, and a rubber wheel 28 is rotatably provided at the lower end of the two leveling rods 27. A second spring 29 is provided at the inner upper end of each storage tube 26, and the upper and lower ends of the second spring 29 are respectively fixedly connected to the inner top surface of the storage tube 26 and the upper end of the leveling rod 27.

[0040] The present invention provides a method for using a reversible lifting fixture for round bar processing, comprising the following steps: Step 1: First, connect the lifting fixture to the lifting equipment through the lifting ring 3, then start the lifting equipment, lift the lifting fixture through the lifting equipment, and then move the position of the lifting fixture through the lifting equipment. When the lifting fixture moves to the top of the workpiece, the lifting fixture is controlled to descend through the lifting equipment. When the workpiece is placed in the middle of the lifting fixture, the lifting equipment is continued to be controlled to descend until the rubber wheels 28 of the leveling components on both sides of the lifting fixture are in contact with the ground. When the rubber wheels 28 of the leveling components on both sides are in contact with the ground, the clamping and flipping components on both sides are at the same height.

[0041] Before the rubber wheel 28 contacts the ground, the blocking block 14 on the hanging shaft 13 is located at the upper end of the two wedge blocks 18, and the blocking block 14 is limited by the upper end of the end surface of the two wedge blocks 18 that are close to each other, to ensure that the hanging shaft 13 does not continue to slide downward, and the hanging shaft 13 maintains a fixed initial height; the lower end of the hanging shaft 13 is connected to the middle part of the inner clamp frame 8 through the slide tube 15, so that the distance between the middle part of the inner clamp frame 8 and the hanger 4 remains fixed, and the inner clamp frame 8 and the outer clamp frame 7 maintain a fixed initial opening angle.

[0042] Step 2: After the rubber wheel 28 contacts the ground, the distance between the left and right clamps 32 gradually increases, and the distance between the upper end of the inner clamp frame 8 and the upper end of the outer clamp frame 7 also gradually increases, so that the distance between the lower ends of the two connecting frames 6 gradually increases. At the same time, the connecting shaft 10 and the connecting cylinder 9 also move away from each other, and the slide cylinder 15 gradually approaches the hanger 4. The slide cylinder 15 slides upward relative to the hanger 13, and the slide cylinder 15 drives the slider 17 to slide upward synchronously. The slider 17 sliding upward pushes the left and right wedges 18 outward through the conical surface of its outer upper end, so that the two wedges 18 move away from each other, and the two first springs 20 are compressed. After the slider 17 passes the left and right wedges 18 upward, the slide cylinder 15 drives the slider 17 to continue to slide upward, and the conical surface of the outer upper end of the slider 17 enters the inside of the positioning groove of the positioning block 14, and the conical surface of the outer upper end of the slider 17 keeps in contact with the inner wall of the positioning groove. At this time, under the action of the rebound force of the first spring 20 , the upper ends of the action inclined surfaces of the two wedge blocks 18 are in contact with the conical surface of the outer lower end of the sliding block 17 .

[0043] Step 3, at this time, the workpiece is located between the two clamps 32, and then the lifting device is controlled to rise, and the lifting device drives the column 1 and the hanger 4 to rise. At this time, the slide 15 drives the slider 17 to descend synchronously due to its own weight. Since the inner wall of the conical surface positioning groove at the upper end of the outer side of the slider 17 remains in contact at this time, when the slide 15 drives the slider 17 to descend, the slider 17 drives the suspension shaft 13 to descend synchronously, and the conical surface at the lower end of the outer side of the slider 17 pushes the two wedges 18 outward, so that the two wedges 18 are separated from each other again, and the two first springs 20 are compressed again. Since the slider 17 is engaged with the positioning block 14 at this time, when the slider 17 passes through the two wedges 18 smoothly, the positioning block 14 also passes through the two wedges 18 smoothly, so that the suspension shaft 13 can continue to descend relative to the initial height. In this way, there is no upward pulling force at the connection between the inner clamp frame 8 and the slide cylinder 15, so that the distance between the middle part of the inner clamp frame 8 and the hanger 4 continues to increase, the opening angle of the inner clamp frame 8 and the outer clamp frame 7 continues to decrease, the lower ends of the two connecting frames 6 continue to rotate downward, the connecting shaft 10 and the connecting cylinder 9 continue to approach, and the two clamping jaws 32 continue to approach, thereby clamping the workpiece.

[0044] Step four, when clamping the workpiece, the clamping jaws 32 on both sides first abut against the surface of the workpiece, when the clamping jaws 32 on both sides approach the workpiece and clamp the workpiece, the third spring 34 will be squeezed, the third spring 34 will be compressed, and the rotating shafts 30 on both sides will move outward. At this time, the positioning plate 38 will move with the movement of the rotating shaft 30, and the annular groove 39 on the outer side of the positioning plate 38 will abut against the upper and lower limit blocks 37. When the rotating shaft 30 continues to move outward, the limit block 37 will be pushed into the limit groove through the positioning plate 38. At this time, the fourth spring 36 is in a compressed state. When the fourth spring 36 cannot be compressed, the clamping jaws 32 on both sides completely clamp the workpiece.

[0045] Step 5, after clamping the workpiece, control the lifting equipment to continue to rise, thereby controlling the lifting fixture to continue to rise, and then completely lift the workpiece. Since the workpiece is in the shape of a round rod, when the jaws 32 on both sides are not at the same horizontal position as the center of gravity of the workpiece, the workpiece will flip, thereby driving the jaws 32 on both sides to flip, and then control the limit block 37 to slide in the annular slide 39. When the upper and lower limit blocks 37 slide to the front and rear positioning ports 40, the limit blocks 37 will be pushed outward by the fourth spring 36, and the outer ends of the two limit blocks 37 will be respectively inserted into the two positioning ports 40, so that the limit box 35 and the positioning plate 38 are clamped and fixed, thereby fixing the rotating shaft 30, thereby fixing the jaws 32. At this time, the workpiece flips from a horizontal state to a vertical state, and the workpiece no longer shakes. When the lifting equipment controls the lifting fixture to continue to move upward, the inner clamp frame 8 and the outer clamp frame 7 will automatically clamp the workpiece with the jaws 32 using the lever principle, and the clamping is tighter as it goes up.

[0046] Step 6: When the workpiece is moved to the designated position, the lifting device is started to descend, thereby controlling the descent of the lifting fixture, and the lifting fixture drives the workpiece to descend as a whole. When the lower end of the workpiece contacts the ground, as the lifting fixture continues to descend as a whole, the inner clamp frame 8 and the outer clamp frame 7 rise relative to the hanger 4, and the inner clamp frame 8 drives the slide 15 to also begin to rise relative to the hanger 4. The distance between the slide 15 and the hanger 4 gradually decreases, so that the jaws 32 at the lower ends of the inner clamp frame 8 and the outer clamp frame 7 gradually loosen until the workpiece is separated from the two jaws 32. After the workpiece is separated, the inner clamp frame 8 and the outer clamp frame 7 move downward again under the action of gravity until the two jaws 32 contact each other. Then the lifting equipment moves the lifting fixture as a whole to the initial location, and manually pulls the lever upward to make the hanging shaft 13 slide upward inside the column 1, and the hanging shaft 13 drives the blocking block 14 to slide upward inside the vertical section of the inverted T-shaped box 12, and at the same time, the hanging shaft 13 drives the slide 15 to rise synchronously through the clamping block 16. In the process of the hanging shaft 13 driving the blocking block 14 to rise, the blocking block 14 pushes the wedge blocks 18 on both sides outward until the blocking block 14 slides upward to the top of the two wedge blocks 18 and then releases the lever. At this time, the blocking block 14 cannot slide downward under the limit of the two wedge blocks 18 and returns to the initial height. At the same time, the slide 15 also returns to the initial height, and the inner clamp frame 8 and the outer clamp frame 7 also return to the initial opening angle. At this time, the next workpiece can be hoisted.

[0047] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A reversible lifting fixture for round bar processing, characterized in that: The invention comprises a column (1), a hanger (4) is fixedly arranged at the lower end of the column (1), a connecting frame (6) is respectively arranged on both sides of the lower end of the hanger (4), an outer clamp frame (7) and an inner clamp frame (8) are respectively slidably hinged on the two connecting frames (6), the outer clamp frame (7) and the inner clamp frame (8) are connected by a telescopic component, and the outer clamp frame (7) is connected to the column (1) by a lifting component, and a clamping and flipping component is respectively arranged at the lower end of the outer clamp frame (7) and the inner clamp frame (8), and the clamping and flipping component comprises a rotatable clamping claw (32).

2. The reversible hoisting fixture for round bar processing according to claim 1 is characterized in that: The hanger (4) comprises two front-to-back symmetrical triangular plates, the upper ends of the two triangular plates being fixedly connected to the lower end of the column (1); a first hinged rod is fixedly arranged between the two left corners and between the two right corners of the lower ends of the two triangular plates; the two ends of the connecting frame (6) are respectively provided with a first waist-shaped groove and a second waist-shaped groove, and the first waist-shaped grooves on the upper sides of the two connecting frames (6) are respectively slidably sleeved on the outer sides of the two first hinged rods of the hanger (4).

3. The reversible hoisting fixture for round bar processing according to claim 2 is characterized in that: The inner clamp frame (8) and the outer clamp frame (7) are X-shaped structures that intersect each other, and the inner clamp frame (8) is located on the inner side of the outer clamp frame (7); the inner clamp frame (8) includes two inner clamp frame plates that are symmetrical in front and back, and the upper ends of the two inner clamp frame plates are fixedly connected by a second hinge rod, and the clamping and flipping assembly is arranged between the lower ends of the two inner clamp frame plates, and the second hinge rod is slidably inserted into the second waist-shaped groove of the left connecting frame (6); the outer clamp frame (7) includes two outer clamp frame plates that are symmetrical in front and back, and the upper ends of the two outer clamp frame plates are fixedly connected by a third hinge rod, and the clamping and flipping assembly is arranged between the lower ends of the two outer clamp frame plates, and the third hinge rod is slidably inserted into the second waist-shaped groove of the right connecting frame (6).

4. The reversible hoisting fixture for round bar processing according to claim 1 is characterized in that: The telescopic assembly comprises a connecting tube (9) and a connecting shaft (10); one end of the connecting shaft (10) is rotatably arranged in the middle of the inner clamp frame (8), and one end of the connecting tube (9) is rotatably arranged in the middle of the outer clamp frame (7); the end of the connecting shaft (10) away from the inner clamp frame (8) is slidably inserted into the opening of the end of the connecting tube (9) away from the outer clamp frame (7); a spline groove is arranged on the inner wall of the connecting tube (9), and a spline sleeve (11) is fixedly arranged at the end of the connecting shaft (10) away from the inner clamp frame (8), and the spline sleeve (11) is slidably inserted into the spline groove.

5. The reversible hoisting fixture for round bar processing according to claim 1 is characterized in that: The lifting assembly comprises an inverted T-shaped box (12), a suspension shaft (13), and a positioning block (14); the inverted T-shaped box (12) comprises a vertical section and a horizontal section, the horizontal section is horizontally arranged along the left-right direction, and the lower end of the vertical section is connected to the middle part of the horizontal section; the upper end of the vertical section of the inverted T-shaped box (12) is fixedly arranged at the middle part of the inner side of the hanger (4); a sliding hole is arranged in the middle part of the bottom plate of the horizontal section of the inverted T-shaped box (12), and the sliding hole corresponds to the vertical section on the upper side; a vertical suspension shaft (13) is slidably inserted in the interior of the vertical section of the inverted T-shaped box (12), and the upper end of the suspension shaft (13) is slidably inserted in the interior of the column (1), and the suspension shaft (13) is The lower end passes through the sliding hole and extends to the outside of the inverted T-shaped box (12); a vertical shifting groove is provided on the side wall of the column (1); a horizontal shifting rod is fixedly provided at the upper end of the outer surface of the hanging shaft (13); the shifting rod passes through the shifting groove on the column (1) and extends to the outside of the column (1); a left-right through inner sliding opening is provided at the lower end of the hanging shaft (13); the length direction of the inner sliding opening is arranged along the vertical direction; a locking block (14) is fixedly provided on one side of the outer side surface of the hanging shaft (13) close to the lower end; the locking block (14) is a conical structure with a thin upper part and a thick lower part; a conical locking groove with a thin upper part and a thick lower part is provided on the lower end surface of the locking block (14).

6. The reversible hoisting fixture for round bar processing according to claim 5 is characterized in that: The lifting assembly further comprises a wedge (18), a connecting rod (19), a first spring (20), and an adjusting nut (21); a wedge (18) is slidably arranged on both sides of the horizontal section of the inverted T-shaped box (12), and the two wedges (18) are symmetrically arranged on the left and right sides of the suspension shaft (13); the end surfaces of the two wedges (18) on the side close to each other are respectively acting inclined surfaces, and the upper edges of the acting inclined surfaces on the two wedges (18) are close to each other and the lower edges are away from each other; a connecting rod (19) is fixedly arranged at the ends of the two wedges (18) away from each other, and an external thread is arranged on the outer side of the end of the connecting rod (19) away from the wedge (18); and each connecting rod (1 A first spring (20) is sleeved on the outer side of each of the two inverted T-shaped boxes (9), the first spring (20) is located on the inner side of the horizontal section of the inverted T-shaped box (12), one end of the first spring (20) is connected to the wedge block (18), and the other end of the first spring (20) is connected to the inner wall of the horizontal section of the inverted T-shaped box (12); a mounting tube is fixedly arranged at both ends of the horizontal section of the inverted T-shaped box (12), and the ends of the connecting rods (19) on both sides away from the wedge block (18) respectively pass through the mounting tube on the same side and extend to the outside of the mounting tube; an adjusting nut (21) is rotatably arranged at the ends of the two mounting tubes away from each other, and the adjusting nut (21) is screwed to the outer side of the connecting rod (19) on the same side.

7. The reversible hoisting fixture for round bar processing according to claim 5 is characterized in that: The lifting assembly further comprises a slide tube (15), a clamping block (16), and a slider (17). A slide tube (15) is slidably sleeved on the outer side of the lower end of the suspension shaft (13). A left-right through outer slide opening is arranged on the side wall of the slide tube (15). The outer slide opening corresponds to the inner slide opening. The clamping block (16) is inserted into the inner slide opening and the inner side slide opening. The lower end of the slide tube (15) is hinged to the middle part of the inner clamp frame (8). A circular slider (17) is fixedly arranged at the upper end opening of the slide tube (15). The slider (17) is sleeved on the outer side of the suspension shaft (13). The upper and lower ends of the outer side surface of the slider (17) are both conical structures. The conical surface of the upper end is kept thin at the top and thick at the bottom, and the conical surface of the lower end is kept thick at the top and thin at the bottom.

8. The reversible hoisting fixture for round bar processing according to claim 1 is characterized in that: The clamping and flipping assembly further comprises a fixed box (22), a clamping block (23), a rotating shaft (30), a limiting plate (31), a counterweight (33), and a third spring (34); a fixed box (22) is fixedly arranged at the lower end of the inner clamp frame (8) and the outer clamp frame (7), respectively; a rotating hole is arranged in the middle of the fixed box (22) and is passed through the fixed box (22), a rotating shaft (30) is slidably inserted in the rotating hole, and the rotating shaft (30) can rotate in the rotating hole; a clamping claw (32) is fixedly arranged at one end of the rotating shaft (30) facing the other side of the clamping and flipping assembly, and a clamping claw (32) is fixedly arranged at one end of the rotating shaft (30) away from the other side of the clamping and flipping assembly A limit plate (31) is provided, and the clamping claw (32) and the limit plate (31) are respectively located on the left and right sides of the fixed box (22); a third spring (34) is sleeved on the outer side of the rotating shaft (30), and the third spring (34) is located on the side of the fixed box (22) away from the limit plate (31), and the two ends of the third spring (34) are respectively connected to the clamping claw (32) and the fixed box (22); the clamping claw (32) is a cubic structure, and an arc-shaped clamping groove is provided at one end of the clamping claw (32) close to the other side for clamping the flip assembly, and the axis of the clamping groove is horizontally arranged along the front-back direction; a counterweight block (33) is fixedly arranged at the lower end of the clamping claw (32).

9. The reversible hoisting fixture for round bar processing according to claim 8, characterized in that: The clamping and flipping assembly further comprises a limit box (35), a fourth spring (36), a limit block (37), and a positioning plate (38). The positioning plate (38) is fixedly arranged at one end of the outer side surface of the rotating shaft (30) close to the clamping claw (32). The positioning plate (38) is located on the inner side of the third spring (34). The positioning plate (38) is a circular ring-shaped plate structure located in the front and rear vertical planes. A circular ring-shaped annular groove (39) is arranged on the end surface of one side of the positioning plate (38) close to the fixed box (22). A positioning groove (39) is arranged at the front and rear ends of the annular groove (39). A ring-shaped limit box (35) is fixedly arranged at one end of the fixed box (22) close to the clamping claw (32), and the limit box (35) is located outside the rotating shaft (30); a hollow limit groove is respectively arranged on the inner side of the upper and lower ends of the limit box (35), and an opening is arranged at one end of the limit groove close to the clamping claw (32); a fourth spring (36) is arranged inside the limit groove, and a limit block (37) is slidably inserted into the opening of the limit groove, and the two ends of the fourth spring (36) are respectively fixedly connected to the limit block (37) and the inner wall of the limit groove.

10. The reversible hoisting fixture for round bar processing according to claim 8, characterized in that: A leveling assembly is provided at the lower end of each fixed box (22), the leveling assembly comprising a T-shaped block (25), a storage tube (26), a leveling rod (27), a rubber wheel (28), and a second spring (29); a T-shaped slot is provided at the lower end of the fixed box (22), the T-shaped slot extends along the front-rear horizontal direction, and a T-shaped block (25) is slidably provided inside the T-shaped slot; two front and rear vertical storage tubes (26) are fixedly provided at the lower end of the T-shaped block (25), and the lower end of the storage tube (26) remains open; the upper ends of the two leveling rods (27) are respectively inserted upward into the inside of the two storage tubes (26), and the lower ends of the two leveling rods (27) are respectively rotatably provided with a rubber wheel (28); a second spring (29) is provided at the inner upper end of each storage tube (26), and the upper and lower ends of the second spring (29) are respectively fixedly connected to the inner top surface of the storage tube (26) and the upper end of the leveling rod (27).

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