A kind of safety height limiting device for lifting machinery

Abstract

The present invention belongs to the technical field of cranes, and in particular to a safety height limit device for cranes. In view of the problem that the steel rope on the existing crane will be temporarily loosened due to inertia when it stops, and thus easily detached from the connection with the guide wheel, the following scheme is proposed, which includes a fixed rod, the top of which is slidably connected to two symmetrically arranged positioning plates, a positioning shaft is rotatably connected between the two positioning plates, a guide wheel is fixedly mounted on the positioning shaft, a steel rope is transmission-connected to the guide wheel, a winding mechanism is provided on the fixed rod, the winding mechanism cooperates with the steel rope, a buffer mechanism is provided on the top of the fixed rod, the buffer mechanism is transmission-connected to the two positioning plates, and a through hole is opened on the fixed rod. The present invention is simple to operate, easy to use, can facilitate the limit buffering of the steel rope when it stops, and can also facilitate the positioning and winding of the steel rope, which is convenient for people to use.

Description

Technical Field

[0001] The invention relates to the technical field of cranes, and in particular to a safety height limiting device for cranes. Background Art

[0002] Hoisting machinery is a kind of engineering machinery that can lift, transport and load and unload materials. It is widely used in lifting and hoisting operations in construction sites, ports, oil fields, railways, warehouses, wind power and other working conditions, such as building bridges, installing power generation equipment, shipbuilding, erecting wind turbines, etc. In recent years, with the rapid development of the national economy, the role of cranes in many industries has become increasingly important. Hoisting machinery has become an important tool to reduce labor intensity and improve production efficiency, and the improvement of crane performance has also received more and more attention.

[0003] The steel rope on the existing crane will be temporarily loose due to inertia when it stops, so it is easy to be disconnected from the guide wheel, so we propose a safety height limit device for the crane. Summary of the invention

[0004] The purpose of the present invention is to solve the defect that the steel rope on the existing crane will be temporarily loose due to inertia when it stops, so that it is easy to be disconnected from the guide wheel, and a safe height limiting device for lifting machinery is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A safety height limit device for a lifting machinery comprises a fixed rod, the top of the fixed rod is slidably connected to two symmetrically arranged positioning plates, a positioning shaft is rotatably connected between the two positioning plates, a guide wheel is fixedly mounted on the positioning shaft, a steel rope is transmission-connected to the guide wheel, a winding mechanism is provided on the fixed rod, the winding mechanism cooperates with the steel rope, a buffer mechanism is provided on the top of the fixed rod, the buffer mechanism is transmission-connected to the two positioning plates, a through hole is opened on the fixed rod, a transmission shaft is rotatably connected on the inner wall of the through hole, a transmission wheel is fixedly mounted on the transmission shaft, the transmission wheel is transmission-connected to the steel rope, a clamping mechanism is provided on the transmission shaft, and the clamping mechanism is transmission-connected to the buffer mechanism.

[0007] Preferably, the buffer mechanism includes two buffer grooves, which are opened at the top of the fixed rod, and the inner wall of the buffer groove is rotatably connected with a rotating rod, the rotating rod is movably connected with a connecting block, the connecting block is fixedly connected to the corresponding positioning plate, and a buffer spring is fixedly installed on the left side of the connecting block, one end of the buffer spring is fixedly connected to the inner wall of the buffer groove, rotating grooves are opened on the inner walls of both sides of the buffer groove, the outer ring of the bearing is fixedly installed on the inner wall of the rotating groove, the inner ring of the bearing is fixedly connected to the corresponding rotating rod, the buffer spring and the buffer groove can buffer the positioning plate through the connecting block, and then can buffer the steel rope.

[0008] Preferably, the winding mechanism includes a protective box, which is fixedly installed on the top of the fixed rod, and a motor is installed on one side of the protective box, a rotating shaft is rotatably connected inside the protective box, the rotating shaft is fixedly connected to the output shaft of the motor, a winding roller is fixedly installed on the rotating shaft, the steel rope is wound on the winding roller, a positioning rod is fixedly installed on one side of the protective box, a guide ring is fixedly installed on the bottom of the positioning rod, and the setting of the winding roller and the guide ring can carry out directional winding of the steel rope.

[0009] Preferably, the clamping mechanism includes two rotating plates, which are fixedly mounted at both ends of the transmission shaft, and a moving rod is slidably connected on the inner wall of the buffer groove, and a clamping block is fixedly mounted on one end of the two moving rods that are close to each other, and a plurality of clamping slots are provided on the sides of the two rotating plates that are away from each other, and the clamping block cooperates with the corresponding clamping slots. A movable hole is provided on the connecting block, and the movable hole is movably connected to the corresponding rotating rod, and a positioning block is fixedly mounted on the inner wall of the movable hole, and a threaded groove is provided on the rotating rod, and the positioning block is slidably connected to the threaded groove, and a driving gear is fixedly mounted on the rotating rod, and a rack is fixedly mounted on the top of the moving rod, and the driving gear and the rack are meshed with each other. The movable connecting block drives the rotating rod to rotate through the sliding connection between the positioning block and the threaded groove, and the mutual meshing of the driving gear and the rack drives the action of the clamping block and the clamping slot on the moving rod, thereby enabling the transmission shaft to be clamped and fixed.

[0010] Compared with the prior art, the advantages of the present invention are:

[0011] (1) Since the buffer groove and the buffer spring are provided in this solution, the positioning plate can be buffered through the connecting block, thereby buffering and resetting the steel rope;

[0012] (2) Due to the sliding connection between the thread groove and the positioning block, and the sliding connection between the connecting block and the buffer groove, the moving connecting block can drive the rotating rod to rotate;

[0013] (3) Due to the mutual meshing of the driving gear and the rack, and the mutual cooperation between the clamping block and the clamping groove, the rotating rotating rod can drive the moving rod to clamp the rotating plate, and then the steel rope can be buffered through the transmission wheel.

[0014] The invention is simple to operate and easy to use, can facilitate position limiting and buffering of the steel rope when it stops, and can also facilitate positioning and winding of the steel rope, so that people are convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a safety height limiting device for a lifting machinery proposed by the present invention;

[0016] Figure 2 A schematic side view of the structure of a safety height limiting device for a lifting machinery proposed by the present invention;

[0017] Figure 3 A schematic diagram of the structure of a winding mechanism of a lifting machinery safety height limiting device proposed by the present invention;

[0018] Figure 4 A schematic diagram of the side view of the rotating plate of a lifting machinery safety height limiting device proposed by the present invention;

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of a connecting block and a rotating rod of a lifting machinery safety height limiting device proposed by the present invention.

[0020] In the figure: 1. fixing rod; 2. positioning plate; 3. guide wheel; 4. buffer groove; 5. connecting block; 6. rotating rod; 7. buffer spring; 8. steel rope; 9. protective box; 10. rotating shaft; 11. winding roller; 12. motor; 13. positioning rod; 14. guide ring; 15. through hole; 16. transmission shaft; 17. transmission wheel; 18. moving rod; 19. driving gear; 20. rack; 21. rotating plate; 22. block; 23. slot; 24. movable hole; 25. threaded groove; 26. positioning block. DETAILED DESCRIPTION

[0021] The technical solution in this embodiment will be clearly and completely described below in conjunction with the drawings in this embodiment.

[0022] Embodiment 1

[0023] Reference Figure 1-5A safety height limit device for a lifting machinery comprises a fixed rod 1, the top of the fixed rod 1 is slidably connected to two symmetrically arranged positioning plates 2, a positioning shaft is rotatably connected between the two positioning plates 2, a guide wheel 3 is fixedly installed on the positioning shaft, a steel rope 8 is transmission-connected to the guide wheel 3, a winding mechanism is provided on the fixed rod 1, the winding mechanism and the steel rope 8 cooperate with each other, a buffer mechanism is provided on the top of the fixed rod 1, the buffer mechanism is transmission-connected to the two positioning plates 2, a through hole 15 is opened on the fixed rod 1, a transmission shaft 16 is rotationally connected on the inner wall of the through hole 15, a transmission wheel 17 is fixedly installed on the transmission shaft 16, the transmission wheel 17 is transmission-connected to the steel rope 8, a clamping mechanism is provided on the transmission shaft 16, and the clamping mechanism is transmission-connected to the buffer mechanism.

[0024] In this embodiment, the buffer mechanism includes two buffer grooves 4, which are opened at the top of the fixed rod 1, and the inner wall of the buffer groove 4 is rotatably connected with a rotating rod 6, and the rotating rod 6 is movably connected with a connecting block 5, the connecting block 5 is fixedly connected to the corresponding positioning plate 2, and a buffer spring 7 is fixedly installed on the left side of the connecting block 5, one end of the buffer spring 7 is fixedly connected to the inner wall of the buffer groove 4, and rotating grooves are opened on the inner walls of the two sides of the buffer groove 4, and the outer ring of the bearing is fixedly installed on the inner wall of the rotating groove, and the inner ring of the bearing is fixedly connected to the corresponding rotating rod 6. The buffer spring 7 and the buffer groove 4 can buffer the positioning plate 2 through the connecting block 5, and then can buffer the steel rope 8.

[0025] In this embodiment, the winding mechanism includes a protective box 9, which is fixedly installed on the top of the fixed rod 1, and a motor 12 is installed on one side of the protective box 9. A rotating shaft 10 is rotatably connected inside the protective box 9, and the rotating shaft 10 is fixedly connected to the output shaft of the motor 12. A winding roller 11 is fixedly installed on the rotating shaft 10, and the steel rope 8 is wound on the winding roller 11. A positioning rod 13 is fixedly installed on one side of the protective box 9, and a guide ring 14 is fixedly installed on the bottom of the positioning rod 13. The setting of the winding roller 11 and the guide ring 14 can carry out directional winding of the steel rope 8.

[0026] In this embodiment, the clamping mechanism includes two rotating plates 21, which are fixedly mounted at both ends of the transmission shaft 16. The inner wall of the buffer groove 4 is slidably connected with a moving rod 18, and a clamping block 22 is fixedly mounted on the ends of the two moving rods 18 that are close to each other. A plurality of clamping grooves 23 are provided on the sides of the two rotating plates 21 that are away from each other, and the clamping blocks 22 cooperate with the corresponding clamping grooves 23. A movable hole 24 is provided on the connecting block 5, and the movable hole 24 is movably connected with the corresponding rotating rod 6, and a positioning block is fixedly mounted on the inner wall of the movable hole 24. 26, a thread groove 25 is provided on the rotating rod 6, and the positioning block 26 is slidably connected with the thread groove 25. A driving gear 19 is fixedly installed on the rotating rod 6, and a rack 20 is fixedly installed on the top of the moving rod 18. The driving gear 19 and the rack 20 are meshed with each other. The movable connecting block 5 drives the rotating rod 6 to rotate through the sliding connection between the positioning block 26 and the thread groove 25, and drives the action of the clamping block 22 and the clamping groove 23 on the moving rod 18 through the mutual meshing of the driving gear 19 and the rack 20, so that the transmission shaft 16 can be clamped and fixed.

[0027] Embodiment 2

[0028] Reference Figure 1-5 A safety height limit device for a lifting machinery comprises a fixed rod 1, the top of the fixed rod 1 is slidably connected to two symmetrically arranged positioning plates 2, a positioning shaft is rotatably connected between the two positioning plates 2, a guide wheel 3 is welded on the positioning shaft, a steel rope 8 is transmission-connected to the guide wheel 3, a winding mechanism is provided on the fixed rod 1, the winding mechanism and the steel rope 8 cooperate with each other, a buffer mechanism is provided on the top of the fixed rod 1, the buffer mechanism is transmission-connected to the two positioning plates 2, a through hole 15 is opened on the fixed rod 1, a transmission shaft 16 is rotatably connected on the inner wall of the through hole 15, a transmission wheel 17 is welded on the transmission shaft 16, the transmission wheel 17 is transmission-connected to the steel rope 8, a clamping mechanism is provided on the transmission shaft 16, and the clamping mechanism is transmission-connected to the buffer mechanism.

[0029] In this embodiment, the buffer mechanism includes two buffer grooves 4, which are opened at the top of the fixed rod 1, and the inner wall of the buffer groove 4 is rotatably connected with a rotating rod 6, and the rotating rod 6 is movably connected with a connecting block 5, the connecting block 5 is fixedly connected to the corresponding positioning plate 2, and a buffer spring 7 is welded on the left side of the connecting block 5, one end of the buffer spring 7 is fixedly connected to the inner wall of the buffer groove 4, and rotating grooves are opened on the inner walls of both sides of the buffer groove 4, and the outer ring of the bearing is welded on the inner wall of the rotating groove, and the inner ring of the bearing is fixedly connected to the corresponding rotating rod 6. The buffer spring 7 and the buffer groove 4 can buffer the positioning plate 2 through the connecting block 5, and then can buffer the steel rope 8.

[0030] In this embodiment, the winding mechanism includes a protective box 9, which is welded to the top of the fixed rod 1, and a motor 12 is installed on one side of the protective box 9. A rotating shaft 10 is rotatably connected inside the protective box 9, and the rotating shaft 10 is fixedly connected to the output shaft of the motor 12. A winding roller 11 is welded on the rotating shaft 10, and the steel rope 8 is wound on the winding roller 11. A positioning rod 13 is welded to one side of the protective box 9, and a guide ring 14 is welded to the bottom of the positioning rod 13. The setting of the winding roller 11 and the guide ring 14 can carry out directional winding of the steel rope 8.

[0031] In this embodiment, the clamping mechanism includes two rotating plates 21, which are welded at both ends of the transmission shaft 16. The inner wall of the buffer groove 4 is slidably connected with a moving rod 18, and the ends of the two moving rods 18 close to each other are welded with a clamping block 22. The sides of the two rotating plates 21 away from each other are provided with a plurality of clamping grooves 23, and the clamping blocks 22 cooperate with the corresponding clamping grooves 23. A movable hole 24 is provided on the connecting block 5, and the movable hole 24 is movably connected with the corresponding rotating rod 6, and a positioning block 2 is welded on the inner wall of the movable hole 24. 6, a thread groove 25 is provided on the rotating rod 6, and the positioning block 26 is slidably connected with the thread groove 25. A driving gear 19 is welded on the rotating rod 6, and a rack 20 is welded on the top of the moving rod 18. The driving gear 19 and the rack 20 are meshed with each other. The movable connecting block 5 drives the rotating rod 6 to rotate through the sliding connection between the positioning block 26 and the thread groove 25, and drives the action of the clamping block 22 and the clamping groove 23 on the moving rod 18 through the mutual meshing of the driving gear 19 and the rack 20, so that the transmission shaft 16 can be clamped and fixed.

[0032] Working principle: when working, start the motor 12 switch, the output shaft of the motor 12 drives the rotating shaft 10 to rotate, the rotating shaft 10 drives the winding roller 11 to rotate, the winding roller 11 winds the steel rope 8, and the steel rope 8 can be positioned by the setting of the guide ring 14, so that the winding roller 11 stably winds the steel rope 8, and at the same time, the steel rope 8 presses the guide wheel 3 under the action of the gravity of the object, so that the guide wheel 3 moves to the left, and the connecting block 5 is buffered by the action of the buffer spring 7 and the buffer groove 4. At the same time, the moving steel rope 8 drives the transmission wheel 17 to rotate through the connection with the transmission wheel 17, and drives the transmission shaft 16 to rotate. When the steel rope 8 stops, the object on the steel rope 8 continues to move forward under the action of inertia. The steel rope 8 is loosened by the buffer spring 7, which drives the positioning plate 2 to move through the connecting block 5, and then presses the steel rope 8 through the guide wheel 3, so that the steel rope 8 remains in a taut state. At the same time, the movable connecting block 5 drives the rotating rod 6 to rotate through the sliding connection between the threaded groove 25 and the positioning block 26. The rotating rod 6 drives the moving rod 18 to move through the mutual engagement of the driving gear 19 and the rack 20. The moving rod 18 cooperates with the card block 22 and the card groove 23 to position the transmission shaft 16, and buffers the steel rope 8 through the friction force between the transmission wheel 17 and the steel rope 8, so that the steel rope 8 can be limited and buffered, which is convenient for people to use.

Claims

1. A lifting machinery safety height limit device, comprising a fixing rod (1), characterized in that: The top of the fixed rod (1) is slidably connected to two symmetrically arranged positioning plates (2), a positioning shaft is rotatably connected between the two positioning plates (2), a guide wheel (3) is fixedly mounted on the positioning shaft, a steel rope (8) is transmission-connected to the guide wheel (3), a winding mechanism is provided on the fixed rod (1), the winding mechanism and the steel rope (8) cooperate with each other, a buffer mechanism is provided on the top of the fixed rod (1), the buffer mechanism is transmission-connected to the two positioning plates (2), a through hole (15) is opened on the fixed rod (1), a transmission shaft (16) is rotationally connected to the inner wall of the through hole (15), a transmission wheel (17) is fixedly mounted on the transmission shaft (16), the transmission wheel (17) is transmission-connected to the steel rope (8), a clamping mechanism is provided on the transmission shaft (16), the clamping mechanism is transmission-connected to the buffer mechanism; The buffer mechanism comprises two buffer grooves (4), the two buffer grooves (4) are arranged at the top of the fixed rod (1), and the inner wall of the buffer groove (4) is rotatably connected to a rotating rod (6), and the rotating rod (6) is movably connected to a connecting block (5), the connecting block (5) is fixedly connected to the corresponding positioning plate (2), and a buffer spring (7) is fixedly installed on the left side of the connecting block (5), and one end of the buffer spring (7) is fixedly connected to the inner wall of the buffer groove (4).

2. A lifting machinery safety height limiting device according to claim 1, characterized in that: The winding mechanism comprises a protective box (9), the protective box (9) being fixedly mounted on the top of the fixed rod (1), and a motor (12) being mounted on one side of the protective box (9), a rotating shaft (10) being rotatably connected inside the protective box (9), the rotating shaft (10) being fixedly connected to an output shaft of the motor (12), a winding roller (11) being fixedly mounted on the rotating shaft (10), and a steel rope (8) being wound around the winding roller (11).

3. A lifting machinery safety height limiting device according to claim 1, characterized in that: The clamping mechanism comprises two rotating plates (21), the two rotating plates (21) are fixedly mounted at two ends of the transmission shaft (16), a moving rod (18) is slidably connected to the inner wall of the buffer groove (4), a clamping block (22) is fixedly mounted on one end of the two moving rods (18) close to each other, and a plurality of clamping grooves (23) are provided on one side of the two rotating plates (21) away from each other, and the clamping blocks (22) cooperate with the corresponding clamping grooves (23).

4. A lifting machinery safety height limiting device according to claim 2, characterized in that: A positioning rod (13) is fixedly mounted on one side of the protection box (9), and a guide ring (14) is fixedly mounted on the bottom of the positioning rod (13).

5. A lifting machinery safety height limiting device according to claim 1, characterized in that: The connecting block (5) is provided with a movable hole (24), the movable hole (24) is movably connected to the corresponding rotating rod (6), and a positioning block (26) is fixedly mounted on the inner wall of the movable hole (24), the rotating rod (6) is provided with a thread groove (25), and the positioning block (26) is slidably connected to the thread groove (25).

6. A lifting machinery safety height limiting device according to claim 5, characterized in that: A driving gear (19) is fixedly mounted on the rotating rod (6), a rack (20) is fixedly mounted on the top of the moving rod (18), and the driving gear (19) and the rack (20) are meshed with each other.

7. A lifting machinery safety height limiting device according to claim 1, characterized in that: The inner walls on both sides of the buffer groove (4) are provided with rotation grooves, the outer ring of the bearing is fixedly mounted on the inner wall of the rotation groove, and the inner ring of the bearing is fixedly connected to the corresponding rotating rod (6).

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