CN218539090U - Steel wire rope pre-tightening device, winch system and tower crane - Google Patents
Steel wire rope pre-tightening device, winch system and tower crane Download PDFInfo
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- CN218539090U CN218539090U CN202121958347.9U CN202121958347U CN218539090U CN 218539090 U CN218539090 U CN 218539090U CN 202121958347 U CN202121958347 U CN 202121958347U CN 218539090 U CN218539090 U CN 218539090U
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- 229910000831 Steel Inorganic materials 0.000 title claims description 52
- 239000010959 steel Substances 0.000 title claims description 52
- 238000004804 winding Methods 0.000 claims abstract description 56
- 238000005303 weighing Methods 0.000 claims description 18
- 230000000903 blocking effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 description 14
- 238000001125 extrusion Methods 0.000 description 9
- 238000009434 installation Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The utility model relates to an engineering machine tool field, especially a wire rope preloading device, hoist engine system and tower machine, wire rope preloading device include the support, it is connected with the pretension reel to rotate on the support, still be provided with mechanical braking system on the support, mechanical braking system is configured to: the mechanical braking system provides frictional resistance to rotation of the pre-tensioning spool. The application a wire rope preloading device, when using, wire rope arrives the hoist engine after winding the pretension reel earlier to the winding is on the hoist engine, the hoist engine is received the rope, and wire rope drives the pretension reel and rotates, mechanical braking system exerts in wire rope winding opposite direction's pretightning force to the pretension reel through the mode that provides frictional resistance, and this pretightning force is exerted on wire rope through the pretension reel, through mechanical structure, it compares in the manual work, can provide more stable and more appropriate pretightning force for wire rope, in order to satisfy subsequent operation requirement.
Description
Technical Field
The utility model relates to an engineering machine tool field, especially a wire rope preloading device, hoist engine system and tower machine.
Background
In the use process of an engineering machine (such as hoisting, luffing, hoisting and other mechanisms in a tower crane or hoisting and other mechanisms in a rotary drilling rig), a steel wire rope wound on a winding drum is usually used as a hoisting, traction or tensioning tool and is the most common and essential important part of the engineering machine.
In the actual use process, especially for a winding drum needing to wind the steel wire rope in multiple layers, the steel wire rope is very necessary to apply proper pretightening force to the winding drum when the steel wire rope is installed on the winding drum for the first time, and the method can effectively ensure that the steel wire rope can be in a tight state on the winding drum and is wound on the winding drum tightly and neatly. The steel wire rope which is not pre-tightened can cause unbalanced stress and serious deformation of the steel wire rope in the winding process, and the steel wire rope is unevenly arranged on the winding drum or mutually bitten or even disordered, so that the abrasion loss of the steel wire rope is greatly increased, the service life of the steel wire rope is influenced, and great potential safety hazards are caused; therefore, when the steel wire rope is installed on the winding drum for the first time, the steel wire rope can be applied with proper pretightening force to obviously improve the rope arrangement effect of the steel wire rope on the winding drum, so that the abrasion loss of the steel wire rope is effectively reduced, the service life of the steel wire rope is prolonged, and the use safety and reliability of the whole machine are improved.
The problem is not effectively solved at present, the steel wire rope still mainly stays in the industry at the primary stage that the steel wire rope is wound by manpower when being installed on a winding drum for the first time, and the method can not guarantee that the steel wire rope can obtain stable and proper pretightening force completely, so that great potential safety hazards are left for subsequent use.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the steel wire rope pre-tightening device, the winch system and the tower crane are provided aiming at the problems that in the prior art, the steel wire rope is wound by manpower when being installed on a winding drum for the first time, so that the steel wire rope cannot be guaranteed to obtain stable and proper pre-tightening force, and great potential safety hazards are left for subsequent use.
In order to realize the purpose, the utility model discloses a technical scheme be:
a steel wire rope pre-tightening device comprises a support, a pre-tightening drum is rotatably connected to the support, a mechanical braking system is further arranged on the support, and the mechanical braking system is configured to: the mechanical braking system provides frictional resistance to rotation of the pre-tensioning spool.
In this application, the mechanical braking system provides a frictional resistance to rotation of the pre-tensioning spool of a magnitude that does not stop the pre-tensioning spool from rotating.
The application a wire rope preloading device, when using, wire rope arrives the hoist engine after winding the pretension reel earlier to the winding is on the hoist engine, at this in-process, the hoist engine is received the rope, and wire rope drives the pretension reel and rotates, mechanical braking system exerts in wire rope winding opposite direction's pretightning force to the pretension reel through the mode that provides frictional resistance, and this pretightning force is exerted on wire rope through the pretension reel, through mechanical structure, it compares in the manual work, and then can provide more stable and more appropriate pretightning force for wire rope, in order to satisfy subsequent operation requirement.
Preferably, the support comprises a first support frame and a second support frame, a central shaft is connected between the first support frame and the second support frame, the pre-tightening winding drum is located between the first support frame and the second support frame, the pre-tightening winding drum is in running fit with the central shaft, and the mechanical braking system is arranged on the central shaft.
Preferably, the pretension reel includes the barrel and connect in the inside interior bushing plate of barrel, the outer wall of barrel is used for winding wire rope, interior bushing plate with center pin normal running fit, mechanical braking system is including locating epaxial friction disc of center, the friction disc is kept away from one side of interior bushing plate has set gradually pressure disk and extrusion subassembly, extrusion subassembly with the center pin is connected, just extrusion subassembly can drive the pressure disk pushes away the friction disc makes the friction disc with interior bushing plate frictional contact.
Preferably, the pressing assembly comprises an elastic piece and a fastening piece, the fastening piece is in threaded connection with the central shaft, the elastic piece is in a compression state, the elastic piece is located between the pressure plate and the fastening piece, and the elastic piece presses the pressure plate along the direction towards the friction plate.
Whole mechanical braking system structure is small and exquisite, and it is compared in hydraulic pressure or pneumatic braking system, and the transportation, simple to operate can rely on the manual work to set up in higher position: such as a tower crane.
Preferably, the mechanical braking systems are arranged on two sides of the lining plate, and the mechanical braking systems on the two sides can be in frictional contact with the lining plate from the two sides of the lining plate.
Preferably, a rope blocking rod is connected between the first support frame and the second support frame and is located on the outer side of the pre-tightening winding drum.
The application also discloses a hoist engine system, including wire rope, hoist engine and as this application wire rope preloading device, wire rope walks around twine behind the pretension reel in on the hoist engine, wire rope is in twine at least two circles on the pretension reel.
The application a hoist engine system, when using, wire rope arrives the hoist engine after winding pretension reel earlier to the winding is on the hoist engine, at this in-process, the hoist engine is received the rope, and wire rope drives the pretension reel and rotates, mechanical braking system exerts in wire rope winding opposite direction's pretightning force to the pretension reel through the mode that provides frictional resistance, and this pretightning force is exerted on wire rope through the pretension reel, through mechanical structure, it compares in the manual work, and then can provide more stable and more appropriate pretightning force for wire rope, in order to satisfy subsequent operation requirement.
The application also discloses tower machine, including gyration superstructure and weighing pulley, still include as this application a hoist engine system, wire rope preloading device set up in weighing pulley with between the hoist engine, wire rope walks around in proper order weighing pulley with twine behind the pretension reel in on the hoist engine, wire rope preloading device the hoist engine with weighing pulley all connect in on the gyration superstructure.
The weighing pulley on the tower crane is used for measuring and limiting the load borne by the steel wire rope.
The rotary upper structure on the tower crane comprises a rotary support, a crane boom, a tower head or a balance arm.
The application a tower machine, it has used this application on tower machine wire rope preloading device, based on weigh the pulley with position installation wire rope preloading device between the hoist engine is better in effect, so will wire rope preloading device set up in weigh the pulley with between the hoist engine, when using, wire rope twines pretension reel earlier and reachs the hoist engine again to twine on the hoist engine, at this in-process, the hoist engine is received the rope, and wire rope drives the pretension reel and rotates, mechanical brake system applys the pretension opposite in wire rope winding direction to the pretension reel through the mode that provides frictional resistance, and this pretension is applyed on wire rope through the pretension reel, and through mechanical structure, it compares in the manual work, and then can provide more stable and more appropriate pretension for wire rope, in order to satisfy subsequent operation requirement.
Preferably, the steel wire rope pre-tightening device further comprises a pressing plate, the pressing plate is detachably connected with the support, a cross beam is clamped between the pressing plate and the support, and the cross beam is connected with the rotary upper structure.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the application a wire rope preloading device, when using, wire rope arrives the hoist engine after twining the pretension reel earlier to twine on the hoist engine, at this in-process, the hoist engine is received the rope, and wire rope drives the pretension reel and rotates, mechanical brake system exerts in wire rope winding opposite direction's pretightning force to the pretension reel through the mode that provides frictional resistance, and this pretightning force is exerted on wire rope through the pretension reel, through mechanical structure, it compares in the manual work, and then can provide more stable and more appropriate pretightning force for wire rope, in order to satisfy subsequent operation requirement.
2. The application a wire rope preloading device, whole mechanical braking system structure is small and exquisite, and it is compared in hydraulic pressure or pneumatic braking system, the transportation, simple to operate can rely on the manual work to set up in higher position: such as a tower crane or the like.
3. The application a hoist engine system, when using, wire rope arrives the hoist engine after twining the pretension reel earlier to twine on the hoist engine, at this in-process, the hoist engine is received the rope, and wire rope drives the pretension reel and rotates, mechanical braking system exerts in wire rope winding opposite direction's pretightning force to the pretension reel through the mode that provides frictional resistance, and this pretightning force is exerted on wire rope through the pretension reel, through mechanical structure, it compares in the manual work, and then can provide more stable and more appropriate pretightning force for wire rope, in order to satisfy subsequent operation requirement.
4. The application a tower machine, it has used this application on tower machine wire rope preloading device, based on weigh the pulley with position installation wire rope preloading device between the hoist engine is better in effect, so will wire rope preloading device set up in weigh the pulley with between the hoist engine, when using, wire rope twines pretension reel earlier and reachs the hoist engine again to twine on the hoist engine, at this in-process, the hoist engine is received the rope, and wire rope drives the pretension reel and rotates, mechanical brake system applys the pretension opposite in wire rope winding direction to the pretension reel through the mode that provides frictional resistance, and this pretension is applyed on wire rope through the pretension reel, and through mechanical structure, it compares in the manual work, and then can provide more stable and more appropriate pretension for wire rope, in order to satisfy subsequent operation requirement.
Drawings
Fig. 1 is a schematic structural diagram of a steel wire rope pre-tightening device of the present invention.
FIG. 2 is a schematic structural view of the pre-tightening reel of the present invention
FIG. 3 is a cross-sectional view of the pre-tightening reel of the present invention cooperating with a mechanical braking system
Fig. 4 is a schematic diagram of the relative position relationship between the weighing pulley, the hoisting machine and the steel wire rope pre-tightening device of the tower crane of the present invention.
An icon: 1-a support; 2-pre-tightening the winding drum; 3-a mechanical braking system; 4-a first support frame; 5-a second support frame; 6-central axis; 7-a cylinder body; 8-inner lining plate; 9-friction plate; 10-side plate; 11-a central hole; 12-a platen; 13-a belleville spring; 14-round nuts; 15-a baffle; 16-a rope blocking rod; 17-a platen; 18-long bolt; 19-a steel wire rope; 22-weighing pulley; 23-a winch; 24-beam.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
As shown in fig. 1 to 3, the steel wire rope pre-tightening device according to the present embodiment includes a support 1, a pre-tightening drum 2 is rotatably connected to the support 1, a mechanical braking system 3 is further disposed on the support 1, and the mechanical braking system 3 is configured to: the mechanical braking system 3 provides frictional resistance to the rotation of the pre-tensioning drum 2.
In the present application, the mechanical braking system 3 provides a frictional resistance to the rotation of the pre-tensioning reel 2 that does not stop the rotation of the pre-tensioning reel 2.
The application a wire rope preloading device, when using, wire rope 19 arrives hoist engine 23 after winding pretension reel 2 earlier to the winding is on hoist engine 23, at this in-process, hoist engine 23 receipts rope, wire rope 19 drives pretension reel 2 and rotates, mechanical braking system 3 exerts in 19 winding direction opposite's pretightning force of wire rope to pretension reel 2 through the mode that provides frictional resistance, and this pretightning force is exerted on wire rope 19 through pretension reel 2, through mechanical structure, it compares in the manual work, and then can provide more stable and more appropriate pretightning force for wire rope 19, in order to satisfy subsequent operation requirement.
Specifically, the mechanical braking system 3 may have the following structure: the support 1 comprises a first support frame 4 and a second support frame 5, a central shaft 6 is connected between the first support frame 4 and the second support frame 5, the pre-tightening winding drum 2 is located between the first support frame 4 and the second support frame 5, the pre-tightening winding drum 2 is in running fit with the central shaft 6, and the mechanical braking system 3 is arranged on the central shaft 6.
The pre-tightening winding drum 2 comprises a drum body 7 and an inner lining plate 8 connected to the inner side of the drum body 7, the outer wall of the drum body 7 is used for winding a steel wire rope 19, the inner lining plate 8 is in running fit with the center shaft 6, the mechanical braking system 3 comprises a friction plate 9 arranged on the center shaft 6, the friction plate 9 is far away from one side of the inner lining plate 8, a pressure plate 12 and an extrusion assembly are sequentially arranged, the extrusion assembly is connected with the center shaft 6, the extrusion assembly can drive the pressure plate 12 to push the friction plate 9, and the friction plate 9 is in friction contact with the inner lining plate 8.
Specifically, the friction plate 9 provided on the center shaft 6: at least two cases are included: the friction plate 9 is arranged on the central shaft 6, and the friction plate 9 is sleeved on the central shaft 6.
Specifically, the inner lining plate 8 is provided with a central hole 11 which is rotatably matched with the central shaft 6.
The extrusion subassembly includes elastic component and fastener, the fastener with center pin 6 threaded connection, the elastic component is in compression state, the elastic component is located pressure disk 12 with between the fastener, just the elastic component is along the extrusion of the direction towards friction disc 9 pressure disk 12.
Whole mechanical brake system 3 structure is small and exquisite, and it is compared in hydraulic pressure or pneumatic braking system, and the transportation, simple to operate can rely on the manual work to set up in higher position: such as a tower crane.
The elastic component can select a belleville spring 13, and the fastener can select a round nut 14, specifically: one side of the pressure plate 12, which is far away from the friction plate 9, is provided with a belleville spring 13, the belleville spring 13 abuts against the pressure plate 12, one side of the belleville spring 13, which is far away from the friction plate 9, is provided with a round nut 14, the round nut 14 abuts against the belleville spring 13, and the round nut 14 is in threaded connection with the central shaft 6.
In addition to the above, it is further preferable that the mechanical brake systems 3 are provided on both sides of the lining plate 8, and the mechanical brake systems 3 on both sides are capable of being brought into frictional contact with the lining plate 8 from both sides of the lining plate 8.
In addition, in a further preferable mode, a rope blocking rod 16 is connected between the first support frame 4 and the second support frame 5, and the rope blocking rod 16 is located on the outer side of the pre-tightening winding drum 2.
Example 2
As shown in fig. 1 to 3, the embodiment provides a steel wire rope pre-tightening device, which is used for effectively pre-tightening a steel wire rope when the steel wire rope is firstly installed on a winding drum, and has the advantages of simple structure, pure mechanical type, small volume, light weight, convenience in installation, disassembly, use and maintenance, high cost performance, and contribution to large-scale popularization in the industry.
The utility model provides a simple and convenient wire rope preloading device, this wire rope preloading device includes: the pre-tightening winding drum 2 is used for winding a steel wire rope; the mechanical braking system 3 compresses the friction surface of the pre-tightening drum 2 and applies pre-tightening force opposite to the winding direction of the pre-tightening drum 2 in a manner of providing friction resistance; and the bracket 1 is used for connecting and supporting the pre-tightening winding drum 2 and the mechanical braking system 3, and the whole device can be reliably and conveniently fixed at a specified installation position.
In addition to the above, in a further preferred aspect, the preload reel 2 includes: two side plates 10, a cylinder 7 and an inner lining plate 8; the mechanical braking system 3 includes: the friction plate assembly comprises two friction plates 9, two pressure plates 12, two belleville springs 13 and four round nuts 14; the stent 1 comprises: the device comprises a first support frame 4, a second support frame 5, a central shaft 6, two baffles 15, a rope blocking rod 16, two pressure plates 17, four long bolts 18 and other standard connecting parts.
In addition to the above, it is further preferable that the side plate 10, the cylinder 7, and the lining plate 8 of the pre-tightening reel 2 are welded to each other. Wherein the left and right side plates 10 play a role in limiting the rope arrangement range of the steel wire rope; the cylinder 7 between the two side plates 10 is a cylinder which can be wound by the steel wire rope 19; the left and right surfaces of the lining plate 8 connected with the inside of the cylinder 7 are provided with friction surfaces contacted with the friction plate 9 to obtain the friction resistance provided by the friction plate 9, the central hole 11 on the lining plate 8 is in clearance fit with the excircle contact surface of the central shaft 6, grease is required to be coated on the excircle contact surface when the position is installed, so that the steel wire rope can drive the pre-tightening drum 2 to stably and smoothly rotate around the central shaft 6 under the condition of overcoming the friction resistance to obtain proper pre-tightening force.
In addition, in a further preferable mode, the side plate 10 and the lining plate 8 of the pre-tightening reel 2 are provided with a certain number of circular lightening holes under the condition of ensuring the strength, so that the weight of the pre-tightening reel 2 is reduced to the maximum.
In addition to the above, in a further preferred aspect, the mechanical brake system 3 is configured such that the disc springs 13 are pressed by a screw tightening force of round nuts 14 screwed to both ends of the center shaft 6; the belleville spring 13 is pressed by the round nut 14 to be elastically deformed so as to provide pressing force to press the pressure plate 12; the pressing plate 12 presses another friction surface of the friction plate 9 contacted with the lining plate 8 of the pre-tightening drum 2 at the same time by pressing the friction plate 9 against the friction surface contacted with the pressing plate; the contact surface of the central hole 11 of the pressure plate 12 and the excircle of the central shaft 6 is limited by adopting flat key connection to be incapable of rotating around the central shaft 6, so that the friction plate 9 pressed on the lining plate 8 of the pre-tightening winding drum 2 by the pressure plate 12 can provide pre-tightening force, namely friction resistance opposite to the winding direction of the pre-tightening winding drum 2.
On the basis of the above, in a further preferable mode, two round nuts 14 are respectively arranged at two ends of the central shaft 6 to ensure that stable and reliable thread tightening force is obtained; meanwhile, the screw tightening length of the round nuts 14 on the two ends of the central shaft 6 can be manually adjusted, so that the elastic deformation of the belleville springs 13, which is generated by the extrusion of the round nuts 14, is changed, the pressing force applied to the friction plates 9 is changed, and finally, the expected steel wire rope pre-tightening force, namely the friction resistance, is obtained.
On the basis, in a further preferable mode, a central shaft 6 of the bracket 1 is used for connecting the pre-tightening winding drum 2 and the mechanical braking system 3 and transmitting force to the left and right supporting frames through a contact surface of the central hole 11; the lower end surface of the baffle 15 arranged on the support frame is jointed with the flat surfaces at the two ends of the central shaft 6 to limit the relative rotation of the central shaft 6 and the support frame; the rope blocking rod 16 connects the left and right support frames together through related connecting standard parts, so that the rigidity of the device is enhanced, and the axial installation width of the device is limited; the pressure plate 17 and the long bolt 18 are matched with the supporting frame to ensure that the device can be conveniently and reliably fixed on a designated mounting cross beam.
On the basis, in a further preferable mode, the axial installation width of the device can be adjusted within the range of the maximum length of the central shaft 6 by adjusting the locking positions of the connecting standard parts at the two ends of the rope blocking rod 16 so as to adapt to different installation environments; the specification and the length of the long bolt 18 and the size of the pressing plate 17 can be changed according to different appearance profiles of the mounting beam, so that the long bolt can be conveniently and reliably fixed at different mounting and fixing positions.
Example 3
As shown in fig. 1 to 4, the present application further discloses a winch system, which includes a steel wire rope 19, a winch 23 and the steel wire rope pre-tightening device as described in the present application, wherein the steel wire rope 19 is wound around the pre-tightening drum 2 and then wound on the winch 23, and the steel wire rope 19 is wound on the pre-tightening drum 2 for at least two turns.
The application a hoist engine system, when using, wire rope 19 arrives hoist engine 23 after winding pretension reel 2 earlier to the winding is on hoist engine 23, at this in-process, hoist engine 23 receipts rope, wire rope 19 drives pretension reel 2 and rotates, mechanical braking system 3 exerts in 19 winding direction opposite's pretightning force of wire rope to pretension reel 2 through the mode that provides frictional resistance, and this pretightning force is exerted on wire rope 19 through pretension reel 2, through mechanical structure, it compares in the manual work, and then can provide more stable and more appropriate pretightning force for wire rope 19, in order to satisfy subsequent operation requirement.
Example 4
As shown in fig. 1-4, the application also discloses a tower crane, including gyration superstructure and weighing pulley 22, still include a hoist engine system as in the application, wire rope preloading device set up in weighing pulley 22 with between hoist engine 23, wire rope 19 walk around in proper order weighing pulley 22 with twine behind the pretension reel 2 on hoist engine 23, wire rope preloading device hoist engine 23 with weighing pulley 22 all connect in on the gyration superstructure.
The weighing pulley 22 on the tower crane is used to measure and limit the load borne by the wire rope 19.
The rotary upper structure on the tower crane comprises a rotary support, a crane boom, a tower head or a balance arm.
The application discloses a tower machine, it has used this application on tower machine wire rope preloading device, based on weighing pulley 22 with position installation wire rope preloading device between hoist engine 23 is better in effect, so will wire rope preloading device set up in weighing pulley 22 with between the hoist engine 23, when using, wire rope 19 arrives hoist engine 23 after earlier winding pretension reel 2, and twines on hoist engine 23, at this in-process, hoist engine 23 receipts rope, and wire rope 19 drives pretension reel 2 and rotates, mechanical braking system 3 applys pretension opposite direction's pretension in wire rope 19 winding direction to pretension reel 2 through the mode that provides frictional resistance, and this pretension is applyed on wire rope 19 through pretension reel 2, and through mechanical structure, it compares in the manual work, and then can provide more stable and more appropriate pretension for wire rope 19 to satisfy subsequent operation requirement.
On the basis, in a further preferable mode, the steel wire rope pre-tightening device further comprises a pressing plate 17, the pressing plate 17 is detachably connected with the support 1, a cross beam 24 is clamped between the pressing plate 17 and the support 1, and the cross beam 24 is connected with the rotary upper structure.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (10)
1. The steel wire rope pre-tightening device is characterized by comprising a support (1), wherein a pre-tightening winding drum (2) is connected to the support (1) in a rotating mode, a mechanical braking system (3) is further arranged on the support (1), and the mechanical braking system (3) is configured to be as follows: the mechanical braking system (3) provides frictional resistance for the rotation of the pre-tightening winding drum (2).
2. A steel wire rope pretensioning device according to claim 1, wherein the bracket (1) comprises a first support frame (4) and a second support frame (5), a central shaft (6) is connected between the first support frame (4) and the second support frame (5), the pretensioning drum (2) is located between the first support frame (4) and the second support frame (5), the pretensioning drum (2) is in running fit with the central shaft (6), and the mechanical braking system (3) is arranged on the central shaft (6).
3. A steel cord pretensioning device according to claim 2, characterized in that the pretensioning drum (2) comprises a drum (7) and an inner lining (8) connected to the inside of the drum (7), the outer wall of the drum (7) is used for winding the steel cord (19), the inner lining (8) is rotatably engaged with the central shaft (6), and the mechanical braking system (3) provides frictional resistance to the rotation of the inner lining (8).
4. A steel wire rope pre-tightening device according to claim 3, wherein the mechanical braking system (3) comprises a friction plate (9) arranged on the central shaft (6), a pressure plate (12) and a squeezing assembly are sequentially arranged on one side of the friction plate (9) far away from the inner lining plate (8), the squeezing assembly is connected with the central shaft (6), and the squeezing assembly can drive the pressure plate (12) to push the friction plate (9), so that the friction plate (9) and the inner lining plate (8) are in frictional contact.
5. A wire rope pretensioning device according to claim 4, characterized in that the pressing assembly comprises a spring element and a fastening element, the fastening element being in threaded connection with the central shaft (6), the spring element being in a compressed state, the spring element being located between the pressure plate (12) and the fastening element, and the spring element pressing the pressure plate (12) in a direction towards the friction discs (9).
6. A steel cord pretensioning device according to claim 3, characterized in that the mechanical braking system (3) is provided on both sides of the inner lining (8), the mechanical braking systems (3) on both sides being frictionally contactable with the inner lining (8) from both sides of the inner lining (8).
7. A steel wire rope pretensioning device according to any one of claims 2-6, characterized in that a rope blocking lever (16) is connected between the first support frame (4) and the second support frame (5), and the rope blocking lever (16) is located outside the pretensioning drum (2).
8. A hoisting system comprising a wire rope (19) and a hoisting machine (23), characterized by further comprising a wire rope pretensioning device according to any one of claims 1-7, wherein the wire rope (19) is wound around the pretensioning drum (2) and then wound around the hoisting machine (23), and the wire rope (19) is wound at least two turns around the pretensioning drum (2).
9. A tower crane, comprising a revolving superstructure and a weighing pulley (22), characterized in that it further comprises a winch system according to claim 8, wherein the wire rope pre-tightening device is arranged between the weighing pulley (22) and the winch (23), the wire rope (19) sequentially bypasses the weighing pulley (22) and the pre-tightening winding drum (2) and then winds on the winch (23), and the wire rope pre-tightening device, the winch (23) and the weighing pulley (22) are all connected on the revolving superstructure.
10. The tower crane according to claim 9, characterized in that the pre-tightening device for the steel wire rope further comprises a pressing plate (17), the pressing plate (17) is detachably connected with the bracket (1), a cross beam (24) is clamped between the pressing plate (17) and the bracket (1), and the cross beam (24) is connected with the rotary upper structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121958347.9U CN218539090U (en) | 2021-08-19 | 2021-08-19 | Steel wire rope pre-tightening device, winch system and tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121958347.9U CN218539090U (en) | 2021-08-19 | 2021-08-19 | Steel wire rope pre-tightening device, winch system and tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218539090U true CN218539090U (en) | 2023-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121958347.9U Expired - Fee Related CN218539090U (en) | 2021-08-19 | 2021-08-19 | Steel wire rope pre-tightening device, winch system and tower crane |
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| CN (1) | CN218539090U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115650092A (en) * | 2022-10-25 | 2023-01-31 | 徐州建机工程机械有限公司 | Rope tightening device and tower crane |
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2021
- 2021-08-19 CN CN202121958347.9U patent/CN218539090U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115650092A (en) * | 2022-10-25 | 2023-01-31 | 徐州建机工程机械有限公司 | Rope tightening device and tower crane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20230228 |