CN219156334U - Cable winding and unwinding device for crane - Google Patents

Abstract

The cable winding and unwinding device for the crane comprises a cable winding and unwinding device arranged on a trolley, wherein the cable winding and unwinding device comprises a vertically arranged protective shell, the upper end of the protective shell is detachably fixed on the trolley, the upper end of the protective shell extends upwards to the upper part of a lifting reel, the bottom end of the protective shell extends downwards to the lower part of the trolley, a fixed pulley block is rotatably assembled in the top end of the protective shell, a movable pulley block which is arranged below the fixed pulley block and corresponds to the fixed pulley block is arranged in the protective shell, and a cable is wound between the movable pulley block and the fixed pulley block; the top of protective housing is equipped with a plurality of leading wheel support, and rotatable assembly has leading wheel and line ball wheel on the leading wheel support, and leading wheel and line ball wheel are parallel and the interval sets up, and the cable passes between leading wheel and the line ball wheel and twines on the leading wheel. The utility model has simple structure and convenient use.

Description

Cable winding and unwinding device for crane

Technical Field

The utility model belongs to the technical field of hoisting equipment, and particularly relates to a cable winding and unwinding device for a crane.

Background

The crane is a multi-action hoisting machine for vertically lifting and horizontally carrying heavy objects in a certain range, which is also called a crown block, an aerial crane and a crane, and generally comprises a crane beam frame, a crane trolley, a cart travelling mechanism, a trolley travelling mechanism and a crane lifting hook, and sometimes power is required to be supplied to the crane lifting hook.

Disclosure of Invention

The utility model provides a cable winding and unwinding device for solving the technical problem that cables are broken due to non-uniform winding and unwinding speed and lifting speed of a lifting hook.

When the cable is required to be contracted, the movable pulley block vertically moves downwards under the action of gravity of the movable pulley block, the cable is wound between the movable pulley block and the fixed pulley block, and the cable is wound and unwound through lifting of the movable pulley block. The top of protective housing is equipped with a plurality of leading wheel support, and rotatable assembly has leading wheel and line ball wheel on the leading wheel support, and leading wheel and line ball wheel are parallel and the interval sets up, and the cable passes between leading wheel and the line ball wheel and twine on the leading wheel, and the leading wheel plays the guide effect to the cable, and the effect of line ball wheel is to avoiding the cable to jump out in the leading wheel, plays the effect of protection cable.

The inside slide rail that is equipped with two vertical settings of cable winding and unwinding devices's protective housing, two slide rails are fixed respectively in the both sides of running block, and the both sides of running block all are fixed with the slider, slider sliding fit on the slide rail, and the slide rail plays the guide effect to the running block, reduces running block's rocking to reduced the traction force of cable, strengthened the life of cable.

The adoption of the scheme has the following advantages:

when the cable is required to be released, the movable pulley block moves vertically upwards under the traction of the cable, and when the cable is required to be contracted, the movable pulley block moves vertically downwards under the action of gravity of the movable pulley block, the cable is wound between the movable pulley block and the fixed pulley block, and the cable is wound and unwound through the lifting of the movable pulley block, so that the cable is convenient to use; the sliding block is slidingly assembled on the sliding rail, the sliding rail plays a role in guiding the movable pulley block, and the shaking of the movable pulley block is reduced, so that the traction force of the cable is reduced, and the service life of the cable is prolonged; the guide wheel plays a guiding role on the cable, and the function of the line ball wheel can avoid the cable to jump out from the guide wheel, plays the effect of protection cable.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic diagram of a second perspective structure of the present utility model;

FIG. 3 is a schematic diagram of a front view of the present utility model;

FIG. 4 is a left side view of the present utility model;

FIG. 5 is a schematic top view of the present utility model;

FIG. 6 is a schematic structural view of a cart travel mechanism;

fig. 7 is an enlarged view of a portion B of fig. 6;

fig. 8 is an enlarged view of a portion a of fig. 2;

FIG. 9 is a schematic diagram of a front view of a cable take-up and pay-off device;

FIG. 10 is a schematic left-hand view of a cable take-up and pay-off device;

FIG. 11 is a schematic view of the cross-sectional view taken along the direction A-A of FIG. 10;

FIG. 12 is a schematic diagram of a front view of a crane hook;

FIG. 13 is a schematic view of the B-B cross-sectional structure of FIG. 12;

FIG. 14 is a schematic perspective view of a crane hook;

FIG. 15 is a schematic view of the construction of the spreader reverser;

FIG. 16 is a schematic view of the structure of the connection plate and pin shaft;

FIG. 17 is a schematic perspective view of a junction box;

fig. 18 is a schematic diagram showing a second perspective structure of the junction box;

FIG. 19 is a schematic view of an exploded construction of the junction box;

FIG. 20 is a schematic perspective view of the reverse hook device;

fig. 21 is a schematic view of the assembly between the counter hook assembly and the main beam.

Reference numerals: 1. a crane beam frame; 2. a cart travel mechanism; 3. a lifting trolley; 4. a lifting mechanism; 5. a cable winding and unwinding device; 6. a crane hook; 7. a sling reverser; 8. a junction box; 9. a lead frame; 10. a reverse hook device; 11. a main beam; 111. the trolley moves along the track; 12. an upper end beam; 13. a cart walking track; 21. traveling wheels of the cart; 211. a support part; 212. a support shaft; 213. a wheel bearing assembly; 214. a gear portion; 215. a support rod bearing; 216. a support rod; 217. a second gear; 22. a gear post; 23. a support frame; 24. a cart power mechanism; 241. a cart walking motor; 242. a first bevel gear; 243. a transmission shaft; 244. a first gear; 245. a second bevel gear; 25. a third gear; 251. a gear frame; 26. a camera; 261. a camera bracket; 31. a trolley travel mechanism; 32. hoisting the frame; 33. lifting holes; 41. lifting the winding drum; 42. a chain; 43. a lifting motor; 51. a protective housing; 52. a fixed pulley block; 53. a movable pulley block; 54. a cable; 55. a guide wheel bracket; 551. a guide wheel; 552. a wire pressing wheel; 56. a slide rail; 561. a slide block; 61. a lifting hook supporting tube; 62. a lower support table; 621. an upper support table; 622. a support plate; 63. a rotating electric machine; 64. a connector; 641. a coupling; 642. a pin; 643. a support bearing; 65. a connecting plate; 651. a fixing part; 66. a lifting hook; 661. a flange plate; 662. an anti-unhooking member; 71. a support column; 711. chamfering; 72. a pin shaft; 721. a pin shaft fixing chain; 722. a fixing hole; 73. a handle; 74. a baffle; 81. a base; 811. a wire inlet hole; 82. a junction box body; 821. locking; 822. a handle; 823. a support leg; 83. a protective cover; 831. fixing the column; 832. a wire outlet hole; 84. a reinforcing plate; 85. a clamping block; 86. a clamping groove; 91. a cart chain supporting rail; 92. a support slat; 93. a cart support chain; 94. a trolley chain supporting rail; 95. a trolley support chain; 101. a first support block; 102. a second support block; 103. a first arm; 104. a second arm; 105. a hook part; 106. a fixed bracket; 107. an adjusting rod; 108. a fitting hole; 109. and a hinge shaft.

Detailed Description

As shown in fig. 1-21, a chain bridge crane comprises a crane beam frame 1, wherein the crane beam frame 1 comprises two parallel upper end beams 12 which are arranged at intervals, two parallel main beams 11 which are arranged at intervals are arranged between the two upper end beams 12, trolley walking rails 111 which are arranged parallel to the main beams 11 are laid on the top ends of the main beams 11, the upper end beams 12 and the main beams 11 play a supporting role, the end parts of the two main beams 11 are detachably fixed on the top ends of the upper end beams 12, the upper end beams 12 are movably assembled on the trolley walking rails 13 through a trolley walking mechanism 2, and the trolley walking mechanism 2 can drive the crane beam frame 1 to freely move along the longitudinal direction of the trolley walking rails 13. The movable trolley 3 that is equipped with in top of girder 11, be equipped with trolley travelling mechanism 31 on the trolley 3, trolley travelling mechanism 31 assembles on the trolley travelling rail 111 on girder 11 top, trolley travelling mechanism 31 can drive hoist trolley 3 along trolley travelling rail 111 free movement, trolley travelling mechanism 31 is including assembling trolley travelling motor and the trolley travelling wheel on trolley 3, trolley travelling motor's power take-off shaft and trolley travelling wheel transmission are connected, be equipped with hoisting mechanism 4 and cable take-up and pay-off 5 on the trolley 3, the below of hoisting mechanism 4 is equipped with hoist lifting hook 6, hoist lifting hook 6 passes through chain 42 and connects on hoisting mechanism 4.

The cart travelling mechanism 2 comprises cart travelling wheels 21, the cart travelling wheels 21 are rotatably assembled at two ends of the upper end beams 12, a gear column 22 which is arranged parallel to the main beams 11 is arranged between the two upper end beams 12, transmission teeth are arranged on the gear column 22, two ends of the gear column 22 are in transmission connection with the cart travelling wheels 21 on the upper end beams 12, the cart travelling mechanism 2 further comprises a support frame 23 which is fixed on the trolley 3, a plurality of groups of cart power mechanisms 24 are fixed at the top ends of the support frame 23, the cart power mechanisms 24 are in transmission connection with the gear column 22, and the cart power mechanisms 24 can drive the gear column 22 to rotate so as to drive the cart travelling wheels 21 to rotate.

The cart power mechanism 24 is provided with two groups and is symmetrically arranged, the cart power mechanism 24 comprises a cart walking motor 241 which is vertically arranged, a first bevel gear 242 is fixed on a power output shaft of the cart walking motor 241, the first bevel gear 242 is vertically arranged, a transmission shaft 243 which is horizontally arranged is rotatably assembled at the lower end of the support frame 23, a second bevel gear 245 and a first gear 244 are fixed on the transmission shaft 243, the first bevel gear 242 and the second bevel gear 245 are meshed with each other, the first gear 244 is meshed with the gear column 22, the cart power mechanism 24 drives the first bevel gear 242 to rotate, the first bevel gear 242 transmits power to the second bevel gear 245, and then the first gear 244 on the transmission shaft 243 transmits power to the gear column 22. The cart running wheel 21 comprises a supporting portion 211, the supporting portion 211 is in rolling fit with the cart running rail 13, supporting shafts 212 which are horizontally arranged are fixed at two ends of the supporting portion 211, the supporting shafts 212 are rotatably assembled on the upper end beam 12 through wheel bearing assemblies 213, a gear portion 214 is arranged at one end of the supporting portion 212, the gear portion 214 and the supporting portion 212 are coaxially arranged, and the outer diameter of the gear portion 214 is larger than that of the supporting portion 212, so that derailment is avoided. The upper end beam 12 above the cart travelling wheel 21 is rotatably connected with a horizontally arranged supporting rod 216 through a supporting rod bearing 215, one end of the supporting rod 216 is fixedly connected with the gear column 22 in a coaxial line detachable mode, a second gear 217 is fixed on the supporting rod 216, and the second gear 217 is meshed with the gear part 214 of the cart travelling wheel 21. The gear rack 251 is fixed on the main beam 11 below the gear column 22, the gear rack 251 plays a supporting role, one end of the gear rack 151 extends to the lower side of the gear column 22, a third gear 25 is rotatably arranged on the gear rack 251, the upper end of the third gear 25 is meshed with the gear column 22, the third gear 25 is arranged right below the middle of the gear column 22, the stability of the gear column 22 can be improved, and the deformation of the gear column 22 is reduced.

The lifting mechanism 4 comprises a lifting winding drum 41 which is horizontally arranged, two ends of the lifting winding drum 41 can be rotatably assembled on the lifting trolley 3, a chain notch for assembling a chain 42 is formed in the lifting winding drum 41, the upper end of the chain 42 is assembled in the chain notch, and the lower end of the chain 42 is detachably fixed on the crane hook 6; lifting motors 43 are arranged on the lifting trolleys 3 at two ends of the lifting reel 41, the two lifting motors 43 are symmetrically arranged, power output shafts of the two lifting motors 43 are in transmission connection with the lifting reel 41, the lifting motor 43 drives the lifting reel 41 to rotate, the lifting reel 41 pulls a chain 42 to move upwards or downwards, and then the height of the crane lifting appliance 6 is adjusted.

The cable winding and unwinding device 5 comprises a vertically arranged protective shell 51, the cross section of the protective shell 51 is rectangular, the upper end of the protective shell 51 can be detachably fixed on the trolley 3, the upper end of the protective shell 51 extends upwards to the upper side of the lifting drum 41, the bottom end of the protective shell 51 extends downwards to the lower side of the trolley 3, a fixed pulley block 52 is rotatably assembled in the top end of the protective shell 51, a plurality of fixed pulleys are arranged on the fixed pulley block 52, a movable pulley block 53 which is arranged in the protective shell 51 below the fixed pulley block 52 and corresponds to the fixed pulley block 52 is arranged in the protective shell 51, a cable 54 is wound between the movable pulley block 53 and the fixed pulley block 52, the movable pulley block 53 moves vertically upwards, and the cable 54 is released; when the cable 54 is required to be contracted, the movable pulley block 53 vertically moves downwards under the action of gravity of the cable 54, the cable 54 is wound between the movable pulley block 53 and the fixed pulley block 52, and the cable 54 is wound and unwound through lifting of the movable pulley block 53. The top of the protective shell 51 is provided with a plurality of guide wheel brackets 55, the guide wheel brackets 55 are rotatably provided with guide wheels 551 and wire pressing wheels 552, the guide wheels 551 and the wire pressing wheels 552 are arranged in parallel and at intervals, the cable 54 passes through the space between the guide wheels 551 and the wire pressing wheels 552 and is wound on the guide wheels 551, the guide wheels 551 play a role in guiding the cable 54, and the wire pressing wheels 552 can prevent the cable 54 from jumping out of the guide wheels 551 and play a role in protecting the cable 54. The inside of the protective housing 51 of the cable winding and unwinding device 5 is provided with two vertically arranged sliding rails 56, the two sliding rails 56 are respectively fixed on two sides of the movable pulley block 53, the two sides of the movable pulley block 53 are respectively fixed with a sliding block 561, the sliding blocks 561 are slidably assembled on the sliding rails 56, the sliding rails 56 play a guiding role on the movable pulley block 53, and shaking of the movable pulley block 53 is reduced, so that traction force of the cable 54 is reduced, and service life of the cable 54 is prolonged.

The crane hook 6 includes the lifting hook stay tube 61 of vertical setting, the inside cavity of lifting hook stay tube 61, and lifting hook stay tube 61's upper end can be dismantled and fix on the chain 42, lifting hook stay tube 61's bottom can be dismantled and be fixed with the lower brace table 62, the top of lower brace table 62 is equipped with the last brace table 621 of level setting, be equipped with the backup pad 622 that a plurality of even interval set up between last brace table 621 and the lower brace table 62, go up brace table 621 and fix on lower brace table 62 through backup pad 622, go up brace table 621's top and be fixed with the rotating electrical machines 63 of vertical setting, rotating electrical machines 63 and cable 54 switch-on in the cable winding and unwinding devices 5. The top of lower brace table 62 is rotatably equipped with connector 64 through supporting bearing 643, connector 64 plays the connection effect, the upper end of connector 64 passes through the shaft coupling 641 transmission with the power take off shaft of rotating electrical machines 63 and is connected, the below of lower brace table 62 is equipped with the connecting plate 65 of vertical setting, the upper end of connecting plate 65 is equipped with fixed part 651, the upper end of connecting plate 65 upwards extends lower brace table 62 and can dismantle fixed connection through pin 642 with connector 64, the lower extreme of connecting plate 65 can be dismantled through the ring flange 661 and be fixed with lifting hook 66, start rotating electrical machines 63, rotating electrical machines 63 pass through connector 64 and drive connecting plate 65 rotation, realize the rotation regulation of lifting hook 66.

The lifting appliance reverser 7 is arranged between the connecting plate 65 and the lifting hook 66, the angle of the lifting hook 66 is convenient to adjust, the lifting appliance reverser 7 comprises a vertically arranged supporting column 71, a vertically arranged rectangular through hole is formed in the supporting column 71, a chamfer 711 is arranged at the through hole at the top end of the supporting column 71, the connecting plate 65 is convenient to position and insert, the connecting plate 65 can be inserted into the through hole in the supporting column 71, a fixing hole 722 which is horizontally arranged is formed in the side face of the supporting column 71, a fixing hole 722 which corresponds to the fixing hole 722 in the supporting column 71 is formed in the connecting plate 65, the supporting column 71 is fixedly connected with the connecting plate 65 through a pin shaft 72, when the angle of the lifting hook 66 needs to be adjusted, the pin shaft 72 is pulled down, the lifting hook 66 and the supporting column 71 are rotated by 180 degrees, the connecting plate 65 is inserted into the through hole in the supporting column 71, and then the pin shaft 72 penetrates into the fixing holes 722 in the connecting plate 65 and the supporting column 71. The one end of round pin axle 72 is fixed with handle 73, be connected with round pin axle fixed chain 721 on the handle 73, the other end of round pin axle fixed chain 721 is fixed on support column 71, the setting of handle 73 conveniently lifts off round pin axle 72, the lower extreme of support column 71 is equipped with and is L-shaped baffle 74, the setting of baffle 74 can reduce the rotation of round pin axle 72, the bottom mounting of support column 71 has flange 661, support column 71 can dismantle fixed connection with lifting hook 66 through flange 611, be equipped with unhook 662 on the lifting hook 66, the setting of unhook 662 can avoid the heavy object unhook when lifting by crane 33 the heavy object, the security is strengthened.

The crane trolley 3 is provided with the junction box 8, the junction box 8 comprises a base 81 with a fixing function, a plurality of junction box bodies 82 are fixed at the top end of the base 81, supporting feet 823 are arranged at four corners of the bottom of the junction box bodies 82, fixing holes are formed in the supporting feet 823, the junction box bodies 82 are detachably fixed on the base 81 through fixing bolts, two sides of the junction box bodies 82 are rotatably connected with lock catches 821, the two lock catches 821 are symmetrically arranged, a handle 822 is fixed between the two lock catches 821, a protective cover 83 is arranged above the junction box 8, fixing columns 831 which are arranged in one-to-one correspondence with the lock catches 821 are fixed on two sides of the protective cover 83, a wire outlet 832 is formed in one side of the protective cover 83, an aviation connector is assembled in the wire outlet 832, a wire inlet 811 is formed below the base, clamping blocks 85 are vertically arranged on the side walls in the junction box bodies 82, the clamping blocks 85 and the clamping grooves 86 are arranged in one-to-one correspondence with the clamping blocks 85, the protective cover 83 is convenient to position the protective cover 83, the protective cover 83 is conveniently buckled on the junction box bodies 82, the junction box 8 is arranged in a buckling mode, the junction box 8 is convenient to detach and the junction box 8 is convenient to open by maintenance personnel; reinforcing plates 84 are arranged on two sides of the base 81, and the strength of the base is improved by the reinforcing plates 84.

The upper end beam 12 on the left side of the main beam 11 is fixedly provided with a lead frame 9 which is vertically arranged, one side of the lead frame 9 is provided with a cart support chain rail 91 which is parallel to the upper end beam 12, the upper end of the cart support chain rail 91 is open, two L-shaped support battens 92 are arranged in the cart support chain rail 91, the support battens 92 are fixed on the inner wall of the cart support chain rail 91, an interval exists between the two support battens 92, the support battens 92 are provided with cart support chains 93, the arrangement of the support battens 92 plays a supporting role on the cart support chains 93, the contact area of the cart support chains 93 and air is increased, the heat dissipation speed is increased, one end of the cart support chains 93 is fixed with the lead frame 9, one side of the main beam 11 is fixedly provided with a cart support chain rail 94, a cart support chain 95 is arranged in the cart support chain rail 94, the current cart power supply generally adopts a conductive slide block, the power supply rail is arranged above a workshop steel structure factory, the bridge crane is powered by the conductive slide block, the conductive slide block is required to be replaced frequently, the power supply is improved, the safety of the crane is improved, and the work efficiency is improved.

The two ends of the trolley 3 are respectively provided with an anti-hooking device 10, the anti-hooking devices 10 comprise a first supporting block 101 and a second supporting block 102, the first supporting block 101 and the second supporting block 102 are respectively and correspondingly fixed on the trolley 3, the first supporting block 101 is rotatably connected with a first support arm 103 through a hinge shaft 109, the second supporting block 102 is rotatably connected with a second support arm 104 through a hinge shaft 109, the first support arm 103 and the second support arm 104 are symmetrically arranged, the bottoms of the first support arm 103 and the second support arm 104 are respectively provided with an L-shaped hook part 105, the top ends of the first support arm 103 and the second support arm 104 are respectively provided with an adjusting rod 107, the adjusting rods 107 extend to the upper side of the trolley 3, a fixing bracket 106 which is vertically arranged is fixed on the trolley 3, a plurality of assembly holes 108 which are used for fixing the adjusting rods 107 are arranged on the fixing bracket 106, the distances between the hook parts 105 and the main beams 11 can be adjusted, the main beams 11 with different specifications can be suitable for being arranged in sequence, the anti-hooking devices 10 are arranged from top to bottom, the trolley 3 can be prevented from derailing, and the safety performance is avoided.

Preferably, a lifting frame 32 for lifting the trolley 3 is arranged above the lifting mechanism 4, four corners of the bottom end of the lifting frame 32 are fixed on the trolley 3, the lifting frame 32 is a dome-shaped frame, and lifting holes 33 for lifting are formed in the top end of the lifting frame 32.

Preferably, the bottom end of the protective housing 51 of the cable winding and unwinding device 5 is provided with a paying-off hole, and the bottom end of the protective housing 51 is detachably fixed with a camera bracket 261, and the camera bracket 261 is provided with a camera 26.

The using process comprises the following steps:

when the crane beam frame is in operation, firstly, the position of the crane beam frame 1 is adjusted, a crane walking motor 43 on the crane walking mechanism 2 is started, a power output shaft of the crane walking motor 43 rotates, the first gear 244 is driven to rotate through a first bevel gear 242 and a second bevel gear 245, the first gear 244 transmits power to a gear column 22, a second gear 217 arranged at the end part of the gear column 22 drives a gear part 214 on the crane walking wheel 21 to rotate, a support part 211 of the crane walking wheel 21 rolls along a crane walking track 13, so that the crane beam frame 1 is driven to freely move along the crane walking track 13, the crane walking motor 43 is stopped when the crane beam frame 1 moves above a weight to be lifted, and when the crane beam frame 1 walks along the crane walking track 13, a lead frame 9 drags one end of a crane supporting chain 93, and the crane supporting chain 93 is flatly paved in the crane supporting chain track 91 in a reciprocating manner;

the position of the lifting trolley 3 is adjusted, a trolley travelling motor on the trolley travelling mechanism 31 is started firstly, the trolley travelling motor drives trolley travelling wheels to freely reciprocate along a trolley travelling rail 111 at the top end of the main beam 11, when the lifting trolley 3 moves to the position right above a heavy object to be lifted, the trolley travelling motor is stopped, and when the lifting trolley 3 moves along the trolley travelling rail 111 on the main beam 11, (because of a positioning reverse backlash eliminating function in an electric control system, friction force is not generated between the first gear 244 and the gear column 22, and the first gear 244 and the gear column 22 are not damaged);

the height of the crane hook 6 is adjusted, the lifting motor 43 is started, the lifting motor 43 drives the lifting drum 41 to rotate, the lifting drum 41 rotates and releases the chain 42, the crane hook 3 freely falls in the vertical direction under the action of self gravity, after the crane hook 6 falls to a designated position, the rotating motor 63 on the crane hook 6 is started, the power output shaft of the rotating motor 63 drives the connector 64 to rotate, the connector 64 drives the lifting hook 66 to rotate, after the angle of the lifting hook 66 is adjusted, the rotating motor 63 is stopped, then the trolley travelling motor is started, the position of the lifting trolley 3 is adjusted, the lifting motor 43 is started again after the lifting hook 66 hangs a heavy object, the lifting drum 41 is driven to reversely rotate, the lifting drum 41 pulls the chain 42, and the chain 42 pulls the lifting hook 66 and the heavy object to vertically rise;

when the crane hook 6 is assembled, the angle of the crane hook 6 needs to be adjusted, the pin shaft 72 is rotated through the handle 73, so that the handle 73 is separated from the blocking of the baffle 74, then the pin shaft 72 is pulled out, the hook 66 and the support column 71 are moved downwards until the connecting plate 65 is moved out of the support column 71, then the hook 66 and the support column 71 are moved upwards after the hook 66 and the support column 71 are rotated clockwise by 180 degrees, the connecting plate 65 is inserted into the support column 71 again, then the support column 71 is fixed on the connecting plate 65 through the pin shaft 72, the pin shaft 72 is rotated, and the handle 73 is rotated into the baffle 74, so that the reversing of the hook 66 is realized;

when the crane hook 6 falls down in the vertical direction, the cable pulls the movable pulley block 53 to move vertically upwards, the sliding block 561 slides upwards in the sliding rail 56, the distance between the movable pulley block 53 and the fixed pulley block 52 is reduced, and the cable 54 between the movable pulley block 53 and the fixed pulley block 52 is released; similarly, when the crane hook 6 ascends, the movable pulley block 53 vertically falls under the action of self gravity, at the moment, the sliding block 561 vertically slides downwards along the sliding rail 56, the distance between the movable pulley block 53 and the fixed pulley block 52 is increased, and the cable 54 is wound between the movable pulley block 53 and the fixed pulley block 52, so that the cable 54 is wound and unwound;

when the junction box 8 is used, a cable enters the junction box body 82 from a wire inlet hole 811 at the bottom end of the base 81, the conversion of the circuit is completed in the junction box body 82, and then the cable passes through a hole 832 on the protective cover 83; when the protective cover needs to be detached, the handle 822 is pressed, the lock catch 821 rotates and is separated from the fixed column 831 on the protective cover 83, after a cable passes out from the wire outlet 832 on the protective cover 83, the protective cover 83 is buckled above the junction box body 82, the handle 822 is rotated upwards, and the fixed column 831 falls into the lock catch 821, so that the protective cover 83 is fixed;

when the counter hook device 10 is installed, the first supporting block 101 and the second supporting block 102 are welded according to the distance between the two main beams 11, and the distance between the hook part 105 and the main beams 11 is adjusted by installing the adjusting rod 107 at the height of the supporting frame 106, so that the counter hook device 10 is suitable for the main beams 11 with different specifications.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "horizontal", "vertical", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The above embodiments are illustrative of the present utility model, and not limiting, and any simple modifications of the present utility model fall within the scope of the present utility model.

Claims (4)

1. The utility model provides a cable winding and unwinding devices for hoist, is including setting up the cable winding and unwinding devices on the travelling bogie, and cable winding and unwinding devices includes the protective housing of vertical setting, and protective housing's upper end can be dismantled and fix on the travelling bogie, its characterized in that: the upper end of the protective shell upwards extends to the upper side of the lifting winding drum, the bottom end of the protective shell downwards extends to the lower side of the lifting trolley, a fixed pulley block is rotatably assembled in the top end of the protective shell, a movable pulley block which is arranged corresponding to the fixed pulley block is arranged in the protective shell below the fixed pulley block, and a cable is wound between the movable pulley block and the fixed pulley block.

2. The cable winding and unwinding device for a crane according to claim 1, wherein: the top of protective housing is equipped with a plurality of leading wheel support, and rotatable assembly has leading wheel and line ball wheel on the leading wheel support, and leading wheel and line ball wheel are parallel and the interval sets up, and the cable passes between leading wheel and the line ball wheel and twines on the leading wheel.

3. The cable winding and unwinding device for a crane according to claim 2, wherein: the inside slide rail that is equipped with two vertical settings of cable winding and unwinding devices's protective housing, two slide rails are fixed respectively in the both sides of running block, and the both sides of running block all are fixed with the slider, slider sliding assembly on the slide rail.

4. A cable take-up and pay-off device for a crane according to any one of claims 1 to 3, characterized in that: pay-off holes are formed in the bottom end of a protective shell of the cable winding and unwinding device, a camera support is detachably fixed to the bottom end of the protective shell, and a camera is assembled on the camera support.

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