Electric telescopic positioning device

Abstract

An electric telescopic positioning device for a lifting device comprises an upper crossbeam with hanging shafts fixed at both ends, and a slab clamp is arranged on both sides below the upper crossbeam. The upper ends of a pair of pull rods of the slab clamp are hinged via hinge shaft i, and the lower ends are respectively hinged to the upper ends of a pair of clamp arms via hinge shaft ii. A hinge shaft iii is provided in the lower middle part of the clamp arm, and a clamp claw is fixed at the lower end. The two ends of the lower crossbeam are fixed to the slab clamp. It is characterized in that an electric telescopic positioning seat is fixed to the middle part of the lower crossbeam via bolt i. The electric telescopic positioning seat adopting this technical solution is installed on the slab clamp, so that the slab clamp can adapt to the complex and changeable on-site use environment, and can realize that slabs of different thicknesses can be lifted with only one specification and model of slab clamp, and the number of slabs lifted at a single time can also be adjusted. Thereby greatly improving and reducing production costs and improving operational safety.

Description

Technical Field

[0001] The invention relates to a lifting sling. Background Art

[0002] In the slab production line, slabs 23 of different thicknesses often need to be hoisted according to different process requirements. Different working conditions also have different requirements for the number of slabs 23 to be hoisted at a time, sometimes a single slab, sometimes multiple slabs. To hoist the slabs 23, a hoisting tool slab clamp is required. The structure of the slab clamp is shown in the attached figure. Figure 1 , 2 As shown, it includes an upper crossbeam 26 with hanging shafts 25 fixed at both ends of the upper part, and the slab clamp is arranged on both sides below the upper crossbeam 26. The upper ends of a pair of pull rods 27 of the slab clamp are hinged through hinge shafts i-53, and the lower ends are respectively hinged to the upper ends of a pair of clamp arms 28 through hinge shafts ii-54. A hinge shaft iii-55 is provided in the lower middle part of the clamp arm 28, and a clamp claw 21 is fixed at the lower end. When working, the slab clamp is placed on the steel plate through a fixed positioning seat 22, the hanging shaft 25 is lifted by the crane hook, the pull rod 27 and the clamp arm 28 are driven by the upper crossbeam 26, and the slab 23 is lifted by clamping the clamp claw 21. Among them, the fixed positioning seat 22 is a device in the slab clamp that has the function of controlling the thickness of the slab 23 lifted and the number of slabs 23 lifted at a single time. Therefore, the vertical height between the lower surface of the fixed positioning seat 22 and the clamp teeth determines the thickness of the slab 23 that the slab clamp can lift and the number of slabs 23 lifted at a single time. As attached Figure 3 , 4 As shown. The positioning seat in the traditional slab clamp is fixed, so the slab clamp with a fixed positioning seat 22 can only lift a fixed number of slabs 23, for example, only one piece at a time or only two pieces at a time. It cannot flexibly adapt to the changing use environment on site and has low efficiency. In the production process, in order to lift slabs 23 of different specifications, it is often necessary to configure slab clamps of various specifications, which not only causes a waste of resources, but also increases the workload of equipment maintenance. Frequent replacement of slab clamps of different specifications also causes a waste of time, reduced efficiency, and the generation of safety hazards. Summary of the invention

[0003] In order to solve the problems existing in the above-mentioned prior art, the present invention adopts the following technical scheme: an electric telescopic positioning device for a lifting sling, comprising an upper crossbeam with hanging shafts fixed at both ends, and a slab clamp is arranged on both sides below the upper crossbeam. The upper ends of a pair of pull rods of the slab clamp are hinged through hinge shaft i, and the lower ends are respectively hinged to the upper ends of a pair of clamp arms through hinge shaft ii. The lower middle part of the clamp arm is provided with a hinge shaft iii and a clamp claw is fixed at the lower end. The two ends of the lower crossbeam are fixed to the slab clamp. It is characterized in that: the middle part of the lower crossbeam is fixed with an electric telescopic positioning mechanism through bolt i. The electric telescopic positioning mechanism includes an inner box body inside the outer box body and a motor installed on the outer box body. The motor is a reduction motor. The outer box body includes a long side plate of the outer box body with protrusions on both sides below and an isosceles trapezoid on the top, a group of short side plates of the outer box body, and an upper cross plate and a lower cross plate in the horizontal direction. The upper cross plate and the upper cover plate are fixed to each other, and the upper cover plate is provided with a circular hole i. The protrusion below the long side plate of the outer box body is fixed with a mounting plate. A side bracket is fixed on the upper side of the lower template of the outer long side plate of the outer box body by screws i. A motor is fixed on the side bracket. A pinion is fixed on the output shaft end of the motor. A buffer frame with an inverted "J"-shaped cross section and a central through hole is provided. The buffer frame is fixed to the lower side of the upper cover plate by bolts ii after a spring is inserted into the buffer frame. The inverted T-shaped buffer shaft passes through the central through hole of the buffer frame, the spring, and the circular hole i provided on the upper cover plate from bottom to top and is fastened by a nut. The spring is a disc spring. The lower template is provided with a circular hole ii coaxial with the circular hole i on the upper cover plate, and the flange of the guide frame with an inverted "J"-shaped cross section is provided with a through hole i. The outer circumferential surface of the inner gear ring is provided with an inner groove and the periphery is provided with a through hole iii. Screws ii penetrate the flange and are fastened to the lower template with the inner gear ring. An outer gear ring with a through hole iv on the periphery and an inner groove on the inner circumferential surface is provided. A ball is provided between the outer groove of the inner gear ring and the inner groove of the outer gear ring. The outer gear ring and the pinion are meshed with each other. A connecting cover with an inverted bowl-shaped cross section is provided, and a through hole ii is provided on the large circumference of the connecting cover, and a vertical long hole is provided on the small circumference. Bolts iii penetrate the through hole ii on the large circumference of the outer gear ring and the through hole iv on the connecting cover to fasten the connecting cover to the outer gear ring. The inner gear ring and the lower template on the outer box body are fixed by evenly distributed screws ii, and the outer gear ring and the connecting cover are fastened by evenly distributed bolts iii. Both sides of the long side plate in the area below the lower template are fixed with a slide rail top block structure. The inner box body includes a pair of inner box body U-shaped notch plates and a pair of inner box body long vertical plates, an inner box body short vertical plate and a square end cover at the bottom of the U-shaped notch to form a hollow structure, and the lower part of the structure is fixed to the electric telescopic positioning seat as a whole. Rollers are installed in the electric telescopic positioning seat. A nut is provided in the center of the square end cover. Vertical slide rails are provided on both sides of each inner box body U-shaped notch plate and on the outer side of each inner box body long vertical plate. The outer slide rail positions of the inner box body corresponding to the outer box body long vertical plate and the outer box body short vertical plate are all equipped with slide rail top block structures. The slide rail top block structure includes a guide bar fastened to the gland by screws iii, and the gland is fastened to the long side plate by screws iv.The nut is placed between the end cover ii and the nut rack fixed on the long vertical plate of the inner box. A radial movable gap is provided between the nut and the end cover ii and the nut rack. The upper end of the lead screw is provided with a horizontal hole, and the thick-diameter lifting block provided in the middle and upper part is placed in the nut and the guide frame. The upper end of the lead screw is inserted into the horizontal hole and the vertical long hole by the transition pin. Nuts are fastened at both ends of the transition pin. The lower surface of the buffer shaft presses the upper surface of the lead screw. There is a movable gap between the upper end surface of the lifting block and the bottom of the bowl-shaped inverted connection cover.

[0004] The electric telescopic positioning seat adopting this technical solution is installed on the slab clamp, so that the slab clamp can adapt to the complex and changeable on-site use environment, and can use only one type of slab clamp to lift slabs of different thicknesses, and can also adjust the number of slabs lifted at a time, thereby greatly improving and reducing production costs and improving operational safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] The present invention is described in detail below with reference to the accompanying drawings, parts and serial numbers:

[0006] Figure 1 A schematic diagram of the slab clamp structure with a traditional positioning seat installed in the prior art.

[0007] Figure 2 for Figure 1 Left view of .

[0008] Figure 3 for Figure 2 Part of the figure - Schematic diagram of a fixed positioning seat lifting a single workpiece.

[0009] Figure 4 for Figure 2 Part of the figure - Schematic diagram of a fixed positioning seat lifting two workpieces.

[0010] Figure 5 The present invention is a schematic diagram of the structure of a slab clamp equipped with an electric telescopic positioning device of a lifting device.

[0011] Figure 6 for Figure 5 Left view of .

[0012] Figure 7 for Figure 6 Part of the figure - Schematic diagram of the electric telescopic positioning device lifting a single workpiece.

[0013] Figure 8 for Figure 6 Part of the figure - Schematic diagram of the electric telescopic positioning device lifting multiple workpieces.

[0014] Fig. 9 It is an axonometric view of the electric telescopic positioning device of the present invention.

[0015] Fig.10 for Fig. 9 Left view of .

[0016] Fig.11 for Fig. 9 main view.

[0017] Fig.12 It is a front view of the outer box body of the electric telescopic positioning device of the present invention.

[0018] Fig.13 for Fig.12 Left view of .

[0019] Fig.14 It is a cross-sectional view of the AA section of the ascending station of the electric telescopic positioning device of the present invention.

[0020] Fig.15 It is a cross-sectional view of the AA section of the lowering station of the electric telescopic positioning device of the present invention.

[0021] Fig.16 for Fig.14 Magnified view of part I.

[0022] Fig.17 for Fig.14 An enlarged view of the structure of the electric telescopic part.

[0023] Fig.18 It is an isometric view of the inner box structure of the electric telescopic positioning device of the present invention.

[0024] Fig.19 for Fig.18 main view.

[0025] Fig. 20 for Fig.18 Left view of .

[0026] Fig.21 for Fig.18 BB section slide rail and slide rail top block structure schematic diagram.

[0027] Fig. 22 for Fig.14 An enlarged view of part II.

[0028] Fig.23 for Fig.16 CC cross-section diagram in .

[0029] In the figure:

[0030] 1. Long vertical plate of outer box, 2. Upper cover, 3. Buffer frame, 4. Spring, 5. Buffer shaft, 6. Motor, 7. Pinion, 8. Transition pin, 9. Connecting cover, 10. Outer gear ring, 11. Inner gear ring, 12. Guide frame, 13. Lead screw, 14. Square end cover, 15. Nut, 16. Nut frame, 17. Long vertical plate of inner box, 18. Slide rail, 19. Slide rail top block, 20. Roller, 21. Clamp claw, 22. Fixed positioning seat, 23. Slab, 24. Electric telescopic positioning seat, 25. Hanging shaft, 26. Upper beam, 27. Pull rod, 28. Clamp arm, 29. Lower crossbeam Beam, 30. Bolt i, 31. Ball, 32. Flanging, 33. Pressure cover, 34. Protrusion, 35. Short vertical plate of outer box, 36. U-shaped notch plate of inner box, 37. Side bracket, 38. Round hole i, 39. Screw i, 40. Upper template, 41. Lower template, 42. Bolt ii, 43. Nut, 44. Round hole ii, 45. Lifting block, 46. Screw ii, 47. Through hole i, 48. Bolt iii, 49. Horizontal hole, 52. Through hole iv, 53. Twisted shaft i, 54. Twisted shaft ii, 55. Twisted shaft iii, 56. Screw iii, 59. Vertical long hole. DETAILED DESCRIPTION

[0031] In order to overcome these defects in the prior art, the present invention proposes the following technical solutions: an electric telescopic positioning device for a lifting device, comprising an upper crossbeam 26 with hanging shafts 25 fixed at both ends, and a slab clamp is arranged on both sides below the upper crossbeam 26. The upper ends of a pair of pull rods 27 of the slab clamp are hinged via hinge shafts i-53, and the lower ends are respectively hinged to the upper ends of a pair of clamp arms 28 via hinge shafts ii-54. A hinge shaft iii-55 is provided in the lower middle part of the clamp arm 28, and a clamp claw 21 is fixed at the lower end, and the two ends of the lower crossbeam 29 are fixed to the slab clamp. It is characterized in that an electric telescopic positioning mechanism is fixed to the middle part of the lower crossbeam 29 via bolts i-30. The electric telescopic positioning mechanism includes an inner box body inside an outer box body and a motor 6 installed on the outer box body. Motor 6 is a reduction motor.

[0032] The outer box body includes an outer box body long side plate 1 with protrusions 34 on both sides below and an isosceles trapezoid on the top, a group of outer box body short side plates 35, and an upper horizontal plate 40 and a lower horizontal plate 41 in the horizontal direction. The upper horizontal plate 40 is fixed to the upper cover plate 2. The upper cover plate 2 is provided with a circular hole i-38. The mounting plate 36 is fixed on the protrusion 34 below the long side plate 1 of the outer box body. A side bracket 37 is fixed above the outer lower template 41 of the long side plate 1 of the outer box body by screws i-39. A motor 6 is fixed to the side bracket 37. A pinion 7 is fixed to the output shaft end of the motor 6. A buffer frame 3 with an inverted "X" cross section and a central through hole is provided. The buffer frame 3 is fixed to the bottom of the upper cover plate 2 by bolts ii-42 after a spring 4 is inserted into the buffer frame 3. The spring 4 is a disc spring. The inverted T-shaped buffer shaft 5 passes through the central through hole of the buffer frame 3, the spring 4, and the circular hole i-38 on the upper cover plate 2 from bottom to top, and is fastened by a nut 43. The lower template 41 is provided with a circular hole ii-44 coaxial with the circular hole i-38 on the upper cover plate 2, and the flange 32 of the guide frame 12 with an inverted "J" cross section is provided with a through hole i-47, the outer circumferential surface of the inner gear ring 11 is provided with an inner groove and the periphery is provided with a through hole iii, and the screw ii-46 passes through the flange 32 and is fastened to the lower template 41 with the inner gear ring 11. An outer gear ring 10 with a through hole iv-52 on the periphery and an inner groove on the inner circumferential surface is provided. A ball 31 is provided between the outer groove of the inner gear ring 11 and the inner groove of the outer gear ring 10. The outer gear ring 10 is meshed with the pinion 7. A connecting cover 9 with an inverted bowl-shaped cross section is provided, and the large circumference of the connecting cover 9 is provided with a through hole ii and the small circumference is provided with a vertical long hole 59. Bolts iii-48 penetrate through holes ii on the large circumference of the outer gear ring 10 and through holes iv-52 on the connection cover 9 to fasten the connection cover 9 to the outer gear ring 10. The inner gear ring 11 and the lower template 41 on the outer box body 1 are fastened by evenly distributed screws ii-46, and the outer gear ring 10 and the connection cover 9 are fastened by evenly distributed bolts iii-48. In this case, the number of screws ii-46 and bolts iii-48 are both 20. Both sides of the long side plate 1 in the area below the lower template 41 are fixed with a slide rail top block structure.

[0033] The inner box body comprises a pair of inner box U-shaped notch plates 36, a pair of inner box long vertical plates 17, inner box short vertical plates and a square end cover 14 at the bottom of the U-shaped notch to form a hollow structure, and the lower part of the structure is fixed to the electric telescopic positioning seat 24 as a whole. The electric telescopic positioning seat 24 is equipped with a roller 20, which can protect itself from being damaged when it contacts the slab 23 during operation. A nut 15 is provided at the center of the square end cover 14. The nut 15 is placed between the end cover ii-14 and the nut rack 16 fixed on the inner box long vertical plate 17. A radial movable gap is provided between the nut 15 and the end cover ii-14 and the nut rack 16. Vertical slide rails 18 are provided on both sides of each inner box U-shaped notch plate and on the outer side of each inner box long vertical plate 17. A slide rail top block structure is installed at the position of the inner box outer slide rail 18 corresponding to the outer box long vertical plate 1 and the outer box short vertical plate 35. This slide rail top block structure includes a guide bar 19 fastened to the pressure cover 33 by screws iii-56. The pressure cover 33 is fastened to the long side plate 1 by screws iv. The inner box body is provided with a slide rail 18 in contact with the outer box body slide rail top block, constraining the inner box body to move up and down only in the vertical direction. A lead screw 13 with a transverse hole 49 at the upper end and a thick-diameter lifting block 45 at the upper middle part are placed in the nut 15 and the guide frame 12. The upper end of the lead screw 13 is inserted into the transverse hole 49 and the vertical long hole 59 by the transition pin 8. Nuts are fastened at both ends of the transition pin 8. The lower surface of the buffer shaft 5 presses the upper surface of the lead screw 13. A movable spacing is provided between the upper end surface of the lifting block 45 and the inverted bowl-shaped bottom of the connecting cover 9.

[0034] The working process of the electric telescopic positioning device of the present invention is as follows:

[0035] The pinion 7 fixed at the lower shaft end of the reduction motor 6 meshes and drives the outer gear ring 10 of the slewing support mechanism to rotate in positive and negative directions. The outer gear ring 10 drives the transition pin 8 through the connecting cover 9 to drive the lead screw 13 to rotate, so that the nut 15 installed on the inner box body moves up and down, and then the inner box body connected to the nut 15 is lifted and lowered in the outer box body.

[0036] The roller 20 located in the inner box will first contact the slab 23 when the slab clamp is working. At this time, the impact force generated by the deadweight of the slab clamp and the speed of falling will cause the inner box to drive the square nut 15 to move upward, thereby causing the lead screw 13 to move upward. At this time, the buffer shaft 5 pressed against the upper surface of the lead screw 13 will slowly compress the spring 4 to contract under the pressure of the upward movement of the lead screw 13, absorbing the impact force caused by the impact, thereby protecting the lead screw 13 and the thread of the nut 15. Since the small circular periphery of the connecting cover 9 is provided with a vertical long hole 59, and the guide frame 12 on which the lead screw 13 is installed has reserved space for movement, the lead screw 13 can move upward freely when an impact occurs without hitting the connecting cover 9 and the transition pin 8, effectively playing a buffering and regulating role.

Claims

1. An electric telescopic positioning device, comprising an upper crossbeam (26) with hanging shafts (25) fixed at both ends of the upper part, a slab clamp arranged at both sides below the upper crossbeam (26), the upper ends of a pair of pull rods (27) of the slab clamp being hinged via hinge shafts i (53) and the lower ends being hinged to the upper ends of a pair of clamp arms (28) via hinge shafts ii (54), the lower middle part of the clamp arm (28) being provided with hinge shafts iii (55) and the lower end being fixed with clamp claws (21), the two ends of a lower crossbeam (29) being fixed to the slab clamp, the middle part of the lower crossbeam (29) being fixed with an electric telescopic positioning mechanism via bolts i (30); the electric telescopic positioning mechanism comprising an inner box body inside an outer box body and a motor (6) mounted on the outer box body, characterized in that The outer box body comprises a set of outer box body long vertical plates (1) and a set of outer box body short vertical plates (35) fixed to each other, the two sides of which are provided with protrusions (34) and the top is an isosceles trapezoid, and an upper template (40) and a lower template (41) in the horizontal direction; the upper template (40) and the upper cover plate (2) are fixed to each other, and the upper cover plate (2) is provided with a circular hole i (38); the inner box body U-shaped notch plate (36) is fixed to the protrusion (34) below the outer box body long vertical plate (1); a side bracket (37) is fixed to the upper side of the lower template (41) of the outer box body long vertical plate (1) by screws i (39); a motor (6) is fixed to the side bracket (37); a pinion (7) is fixed to the output shaft end of the motor (6); a buffer frame (3) with an inverted "J"-shaped cross section and a central through hole is provided, and the buffer frame (3) is fixed to the inner side by bolts ii (42) after a spring (4) is inserted into the buffer frame (3). Below the upper cover plate (2); an inverted T-shaped buffer shaft (5) passes through the central through hole of the buffer frame (3), the spring (4), and the circular hole i (38) provided on the upper cover plate (2) in sequence from bottom to top and is fastened by a nut (43); the lower template (41) is provided with a circular hole ii (44) coaxial with the circular hole i (38) on the upper cover plate (2); a through hole i (47) is provided on the flange (32) of the guide frame (12) having an inverted "J" cross section; an inner groove is provided on the outer circumferential surface of the inner gear ring (11) and a through hole iii (51) is provided on the periphery; a screw ii (46) passes through the flange (32) and is fastened to the lower template (41) with the inner gear ring (11); an outer gear ring (10) is provided with a through hole iv (52) on the periphery and an inner groove is provided on the inner circumferential surface; a ball (31) is provided between the outer groove of the inner gear ring (11) and the inner groove of the outer gear ring (10); The outer gear ring (10) and the pinion (7) are meshed with each other; a connecting cover (9) having an inverted bowl-shaped cross section is provided, the large circumference of the connecting cover (9) is provided with a through hole ii (50) and the small circumference is provided with a vertical long hole (59); bolts iii (48) penetrate through the through hole ii (50) on the large circumference of the outer gear ring (10) and the through hole iv (52) on the connecting cover (9) to fasten the connecting cover (9) and the outer gear ring (10); both sides of the outer box body long vertical plate (1) below the lower template (41) are fixed with a slide rail top block structure; The inner box body comprises a pair of inner box body U-shaped notch plates (36), a pair of inner box body long vertical plates (17), an inner box body short vertical plates and a square end cover ii (14) at the bottom of the U-shaped notch of the pair of inner box body U-shaped notch plates (36) to form a hollow structure, the bottom of which is fixed to the electric telescopic positioning seat (24) as a whole; a nut (15) is provided at the center of the square end cover ii (14); vertical slide rails (18) are provided on both sides of each inner box body U-shaped notch plate (36) and on the outer side of each inner box body long vertical plate (17); the nut (15) is placed between the square end cover ii (14) and a nut frame (16) fixed on the inner box body long vertical plate (17); a radial movable gap is provided between the nut (15) and the square end cover ii (14) and the nut frame (16); A lead screw (13) having a transverse hole (49) with a vertical long hole (59) in cross section is provided at the upper end, and a thick-diameter lifting block (45) is provided at the middle and upper part and is inserted into the nut (15) and the guide frame (12); the upper end of the lead screw (13) is inserted into the transverse hole (49) and the vertical long hole (59) by a transition pin (8); the lower surface of the buffer shaft (5) presses the upper surface of the lead screw (13); and a movable spacing is provided between the upper end surface of the lifting block (45) and the inverted bowl-shaped bottom of the connecting cover (9).

2. The electric telescopic positioning device according to claim 1 is characterized in that The motor (6) is a reduction motor.

3. The electric telescopic positioning device according to claim 1 is characterized in that : The spring (4) is a disc spring.

4. The electric telescopic positioning device according to claim 1, characterized in that The electric telescopic positioning seat (24) is provided with a roller (20).

5. The electric telescopic positioning device according to claim 1 is characterized in that A slide rail top block structure is installed at the position of the outer slide rail (18) of the inner box body corresponding to the outer box body long vertical plate (1) and the outer box body short vertical plate (35).

6. The electric telescopic positioning device according to claim 5, characterized in that The slide rail top block structure comprises a guide bar (19) fastened to a gland (33) by screws iii (56), and the gland (33) is fastened to the long vertical plate (1) of the outer box body by screws iv (57).

7. The electric telescopic positioning device according to claim 1 is characterized in that The inner gear ring (11) is fixed to the lower template (41) on the long vertical plate (1) of the outer box body by means of evenly distributed screws ii (46), and the outer gear ring (10) is fixed to the connecting cover (9) by means of evenly distributed bolts iii (48).

8. The electric telescopic positioning device according to claim 1, characterized in that : Nuts are fastened at both ends of the transition pin (8).

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