CN111422770A

CN111422770A - Steel wire rope pre-tightening equipment and engineering machinery

Info

Publication number: CN111422770A
Application number: CN202010271457.1A
Authority: CN
Inventors: 徐金; 李利斌; 孙沈浩
Original assignee: Sany America Inc
Current assignee: Sany America Inc
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2020-07-17
Anticipated expiration: 2040-04-08
Also published as: CN111422770B

Abstract

The invention relates to the field of mechanical engineering, in particular to steel wire rope pre-tightening equipment and engineering machinery; according to the engineering machinery, the steel wire rope can be stored by the steel wire rope pre-tightening equipment, the pressing wheel of the rope pressing device of the steel wire rope pre-tightening equipment always has the tendency of pressing the steel wire rope to be stored on the winding drum, so that the steel wire rope to be stored on the winding drum can be pre-tightened by the pre-tightening mechanism and can also be pressed on the winding drum by the pressing wheel, the steel wire rope can be tightly wound on the winding drum, and the steel wire rope pre-tightening equipment is ensured to have a good pre-tightening effect on the steel wire rope.

Description

Steel wire rope pre-tightening equipment and engineering machinery

Technical Field

The invention relates to the field of mechanical engineering, in particular to steel wire rope pre-tightening equipment and engineering machinery.

Background

Construction machines are usually provided with a hoisting mechanism for use therewith, such as: when the hoisting height of the crane is large, the winding mechanism needs to wind a plurality of layers of steel wire ropes on the roller. When the crane is lifted by the empty hook, the rope is taken up by the roller, and the steel wire rope is loosely wound on the roller because of very small stress. When the high altitude is suddenly hung and is heavily loaded at this moment, upper wire rope easily sinks into lower floor's wire rope, leads to the rope arrangement confusion, and wire rope is scrapped early, and use cost is high, influences equipment normal use even. In the related technology, in order to enable a steel wire rope wound and stored in a roller of a winch to have pretightening force, a pretightening device is correspondingly configured for the winch; however, the hoisting mechanism with the pre-tightening device provided by the related art still has the problem of poor pre-tightening effect.

Disclosure of Invention

The invention aims to provide steel wire rope pre-tightening equipment and engineering machinery.

The embodiment of the invention is realized by the following steps:

in a first aspect, an embodiment of the present invention provides a steel wire rope pre-tightening apparatus, including a hoisting device, a rope pressing device, and a pre-tightening mechanism,

the winch comprises a winch frame and a roller which is rotatably arranged on the winch frame, wherein the roller is used for accommodating the steel wire rope;

the rope pressing device comprises a pressing wheel, a first shaft and an adjusting assembly, the adjusting assembly is arranged on the hoisting frame, the first shaft is connected with the adjusting assembly, and the first shaft and the axis of the roller are distributed at intervals; the pressing wheel is rotatably sleeved on the first shaft; the adjusting assembly is configured to enable the first shaft to always have a tendency to approach the roller along the radial direction of the roller and enable the pressing wheel to always have a tendency to press the roller so as to press the steel wire rope to be stored between the pressing wheel and the roller; when the steel wire rope pressed between the pressing wheel and the roller is stored in the roller, the pressing wheel can move along the axial direction of the first shaft;

the pre-tightening mechanism comprises a pulley assembly, and the pulley assembly is used for pre-tightening a steel wire rope to be stored in the roller;

when the roller is used for accommodating the steel wire rope, the pulley component, the pinch roller and the roller are sequentially distributed along the moving path of the steel wire rope.

In an optional embodiment, the hoisting frame comprises two side plates which are distributed oppositely, and two axial ends of the roller are respectively and rotatably connected with the two side plates; each side plate is provided with a guide groove, and the length of each guide groove extends along the radial direction of the roller; the two axial ends of the first shaft are respectively in slidable inserting fit with the guide grooves of the two side plates;

the adjustment assembly includes an elastic member connected between the side plate and the first shaft, the elastic member being configured to cause the first shaft to have a tendency to approach the drum at all times and to cause the pinch roller to have a tendency to press against the drum at all times.

In an optional embodiment, the pre-tightening mechanism further comprises a support frame and a driving assembly arranged on the support frame, the pulley assembly comprises a fixed pulley and a movable pulley, a rotating shaft of the fixed pulley, a rotating shaft of the movable pulley and a rotating shaft of the roller are arranged in parallel, and the fixed pulley is rotatably connected to the support frame; the driving assembly is in transmission connection with the movable pulley and is used for driving the movable pulley to be close to or far away from the supporting frame.

In an alternative embodiment, the pretensioning mechanism further comprises a sliding assembly, the supporting frame is slidably connected with the sliding assembly, and the supporting frame is configured to move along the axial direction of the roller relative to the sliding assembly; and/or the presence of a gas in the gas,

the steel wire rope pre-tightening device further comprises a controller, the roller is provided with an encoder and a pressure sensor which are in communication connection with the controller, the steel wire rope is connected with a lifting hook, the encoder is used for detecting the steering of the roller, and the pressure sensor is used for detecting the load of the lifting hook; when the rope is taken up by the roller, the encoder sends a first detection signal to the controller; when the pressure sensor detects that the lifting hook is unloaded, a second detection signal is sent to the controller; the controller is configured to control the driving component to drive the movable pulley to be close to or far away from the supporting frame according to the first detection signal and the second detection signal.

In an optional embodiment, the steel wire rope pre-tightening device further comprises a rope guiding mechanism, the pinch roller and the pre-tightening mechanism are located between the rope guiding mechanism and the winch, the rope guiding mechanism comprises a second shaft and a rope guiding assembly arranged on the second shaft, an axis of the second shaft is parallel to a central axis of the drum, and the rope guiding assembly is used for guiding the steel wire rope to be stored and is configured to move along an axial direction of the second shaft.

In an alternative embodiment, the winch further comprises a first chain wheel in transmission connection with the roller; the second shaft is a threaded shaft, the rope guide assembly is in threaded fit with the threaded shaft, and the rope guide mechanism further comprises a second chain wheel in transmission connection with the threaded shaft; the steel wire rope pre-tightening device further comprises a chain, and the first chain wheel and the second chain wheel are used for supporting the chain.

In an alternative embodiment, the rope guide mechanism further comprises a connecting assembly arranged on the second shaft, and the connecting assembly is configured to move along the axial direction of the second shaft; the rope guiding assembly comprises two rope guiding wheels, the two rope guiding wheels are rotatably arranged on the connecting assembly, and a rope guiding gap is formed between the outer peripheral surfaces of the two rope guiding wheels.

In an alternative embodiment, the connecting assembly comprises a rotating block and a shaft sleeve, the rotating block is rotatably sleeved on the shaft sleeve, and the rope guide wheel is rotatably connected to the rotating block; the shaft sleeve is sleeved on the second shaft and configured to move along the axial direction of the second shaft and drive the rotating block and the rope guide wheel to move along the axial direction of the second shaft.

In an alternative embodiment, the connecting assembly comprises two rotating blocks and two shaft sleeves, the two rotating blocks and the two shaft sleeves are matched in a one-to-one correspondence mode, and the two rotating blocks and the two rope guide wheels are arranged in a one-to-one correspondence mode; the connecting assembly further comprises a adjusting sheet connected between the two rotating blocks, and the adjusting sheet is used for adjusting the gap between the two rope guide wheels.

In a second aspect, an embodiment of the present invention provides a construction machine, including the steel cable pretensioning apparatus according to any one of the foregoing embodiments.

The steel wire rope pre-tightening equipment provided by the embodiment of the invention has the beneficial effects that: the steel wire rope pre-tightening equipment comprises a winch, a rope pressing device and a pre-tightening mechanism, and when a roller stores a steel wire rope, the pulley assemblies, the pinch roller and the roller are sequentially distributed along the moving path of the steel wire rope, so that the steel wire rope to be stored in the winch roller can be pre-tightened by the pulley assemblies of the pre-tightening mechanism in sequence, then passes through the pinch roller and finally is wound on the roller; the pressing wheel always has the trend of pressing on the roller, so that the steel wire rope to be accommodated pre-tightened by the pulley assembly is pressed between the pressing wheel and the roller and then wound on the roller; therefore, when the steel wire rope pre-tightening equipment provided by the embodiment of the invention is used for accommodating a steel wire rope, the steel wire rope can be pre-tightened by using the pulley assembly, and the steel wire rope can be further pressed on the roller by using the pressing wheel, so that the steel wire rope can be tightly wound on the roller, and the steel wire rope pre-tightening equipment is ensured to have a good pre-tightening effect on the steel wire rope.

The engineering machinery of the embodiment of the invention has the beneficial effects that: the engineering machinery provided by the embodiment of the invention comprises the steel wire rope pre-tightening equipment, and the steel wire rope pre-tightening equipment can provide pre-tightening force for the steel wire rope to be stored and has a good pre-tightening effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a steel wire rope pre-tightening device in an embodiment of the invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view taken at III in FIG. 1;

FIG. 4 is a partial schematic view of a movable sheave and a drive assembly in an embodiment of the present invention;

FIG. 5 is a schematic diagram of the configuration of the leader assembly and connector assembly in an embodiment of the present invention;

fig. 6 is a sectional view taken in the direction B-B in fig. 5.

Icon: 010-steel wire rope pre-tightening equipment; 100-hoisting; 200-a rope pressing device; 300-pre-tightening mechanism; 110-a hoisting frame; 111-side plates; 120-a roller; 210-a pinch roller; 220-a first shaft; 230-an adjustment assembly; 310-a pulley assembly; 231-an elastic member; 321-a support frame; 322-a drive assembly; 311-a fixed pulley; 312-a movable pulley; 330-a sliding assembly; 400-a rope guiding mechanism; 410-a second axis; 420-a guide rope assembly; 112-a first sprocket; 113-a second sprocket; 114-a chain; 430-a connection assembly; 421-a rope guide wheel; 422-guide rope gap; 431-a rotating block; 432-shaft sleeve; 433-a trim tab; 121-a first rotating shaft; 232-first connecting plate; 233-a second connecting plate; 323-a drive member; 324-a third connecting plate; 325-pulley shaft; 326-a plug hole; 327-support bars; 411-a mounting plate; 423-axle; 440-guide plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "parallel" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships where the products of the present invention are conventionally placed in use, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiment provides a construction machine, for example: the steel wire rope pre-tightening device 010 can be arranged on various engineering machines such as a crane and a rotary drilling rig and used for retracting and releasing steel wire ropes. It should be understood that the above-described cranes include tower cranes, wheel cranes, crawler cranes, and the like. The following description is given with a crane.

Referring to fig. 1, the wire rope pretensioning device 010 of the present embodiment includes a winch 100, the winch 100 includes a winch frame 110 and a drum 120 rotatably disposed on the winch frame 110, and the drum 120 is used for accommodating the wire rope. The winding frame 110 includes two side plates 111 which are oppositely disposed, and two axial ends of the drum 120 are respectively rotatably connected to the two side plates 111, so that the drum 120 rotates relative to the winding frame 110 to store or release the wire rope. It should be noted that the hoisting frame 110 can be fixedly connected to the body of the crane.

Further, referring to fig. 1, the winding machine 100 further includes a first rotating shaft 121, and the drum 120 is rotatably connected to the winding frame 110 through the first rotating shaft 121. It should be understood that both ends of the first rotating shaft 121 in the axial direction are connected to the two side plates 111, respectively. In this embodiment, the first rotating shaft 121 is rotatably connected to the side plate 111, and the drum 120 is coaxially and fixedly connected to the first rotating shaft 121, so that the drum 120 can rotate around the axis of the first rotating shaft 121 to store, wind, or release the wire rope. In other embodiments, the first shaft 121 is fixedly connected to the side plate 111, and the roller 120 is rotatably sleeved on the first shaft 121.

Still further, referring to fig. 1, the winch 100 of the present embodiment further includes a first chain wheel 112 and a driving mechanism (not shown), wherein the first chain wheel 112 is in transmission connection with the drum 120, and the driving mechanism is in transmission connection with the first chain wheel 112 and is used for driving the first chain wheel 112 and the drum 120 to synchronously rotate so as to store, wind or release the steel wire rope. It should be noted that the driving mechanism includes a motor, and an output shaft of the motor is in transmission connection with the first chain wheel 112 and is used for driving the first chain wheel 112 and the drum 120 to rotate synchronously so as to store, wind or release the steel wire rope. The first chain wheel 112 and the roller 120 are coaxially and fixedly connected, and specifically, the first chain wheel 112 and the roller 120 are coaxially and fixedly connected through a first rotating shaft 121.

Referring to fig. 1 and 2, the steel wire rope pretensioning apparatus 010 of the present embodiment further includes a rope pressing device 200, the rope pressing device 200 includes a pressing wheel 210, a first shaft 220 and an adjusting assembly 230, the adjusting assembly 230 is disposed on the hoisting frame 110, the first shaft 220 is connected to the adjusting assembly 230, and the first shaft 220 and the axis of the drum 120 are distributed at intervals; the pressing wheel 210 is rotatably sleeved on the first shaft 220; the adjusting assembly 230 is configured to make the first shaft 220 always have a tendency to approach the drum 120 in the radial direction of the drum 120 and make the pinch roller 210 always have a tendency to press the drum 120, so as to press the wire rope to be stored between the pinch roller 210 and the drum 120; when the wire rope pressed between the pinch roller 210 and the drum 120 is received in the drum 120, the pinch roller 210 can move in the axial direction of the first shaft 220. With the arrangement, when the steel wire rope is wound and stored by using the steel wire rope pre-tightening device 010, the steel wire rope can be pressed between the pinch roller 210 and the roller 120, and the steel wire ropes can be orderly wound and arranged on the roller 120.

It should be noted that, when the steel wire rope is stored in the drum 120 by the steel wire rope pre-tightening device 010, the steel wire rope is pressed between the pressing wheel 210 and the drum 120, and the steel wire rope is wound around the drum 120 in a circle along the axial direction of the drum 120, the pressing wheel 210 not only rotates around the first shaft 220, but also moves along the winding direction of the steel wire rope in a circle on the drum 120, that is, moves in the axial direction of the drum 120, so as to ensure that the pressing wheel 210 is pressed on the steel wire rope to be stored, and further ensure that the phenomena of looseness, irregular arrangement, rope disorder and the like of the steel wire rope when the steel wire rope is wound around the drum 120 can be reduced.

It should be noted that, in this embodiment, the first shaft 220 is substantially parallel to the axial direction of the drum 120, so that the pressing wheel 210 sleeved on the first shaft 220 can move along with the steel wire rope to be stored along the axial direction of the drum 120, and thus the steel wire rope to be stored is stably pressed between the pressing wheel 210 and the drum 120.

In this embodiment, the two side plates 111 of the hoisting frame 110 are both provided with guide grooves (not shown), and the length of the guide grooves extends along the radial direction of the drum 120; the two axial ends of the first shaft 220 are respectively in slidable insertion fit with the guide grooves of the two side plates 111; so that when the adjusting assembly 230 drives the first shaft 220 to approach the roller 120, the moving path of the pinch roller 210 is more stable, and it is further ensured that the pinch roller 210 can stably press the steel wire rope to be stored between the pinch roller 210 and the roller 120.

Referring to fig. 1 and 3, the adjusting assembly 230 of the present embodiment includes an elastic member 231, the elastic member 231 is connected between the side plate 111 and the first shaft 220, and the elastic member 231 is configured to make the first shaft 220 always have a tendency to approach the roller 120 and make the pressure roller 210 always have a tendency to press the roller 120. So set up, can ensure that pinch roller 210 will treat the wire rope of accomodating steadily and press between pinch roller 210 and cylinder 120, reduce wire rope and appear laxing, arrange untidy, phenomenon such as indiscriminate rope when twining in cylinder 120.

Further, the adjusting assembly 230 of the present embodiment includes two elastic members 231, the two elastic members 231 are disposed in one-to-one correspondence with the two side plates 111, and two axial ends of the first shaft 220 are respectively connected with the two elastic members 231; so set up, can utilize two elastic component 231 to drive first axle 220 steadily and have the trend of being close to cylinder 120 all the time, and then ensure that the pinch roller 210 of cover locating first axle 220 can stably press the wire rope that waits to accomodate.

It should be noted that the elastic member 231 of the present embodiment is a tension spring; in other embodiments, the elastic member 231 may also be an elastic rubber strip or the like.

Referring to fig. 3, the adjusting assembly 230 of the present embodiment further includes two first connecting plates 232, and the two side plates 111, the two first connecting plates 232 and the two elastic members 231 are disposed in a one-to-one correspondence manner; each side plate 111 has an inner side facing the other side plate 111 and an outer side facing away from the other side plate 111, and the first connecting plate 232 is disposed on the outer side of the side plate 111. The guide slot penetrates the corresponding side plate 111 so that the end of the first shaft 220 can be connected with the elastic member 231 penetrating the guide slot; an end of the elastic member 231 remote from the first shaft 220 is connected to the first connection plate 232. With such an arrangement, the elastic member 231 can be stably disposed on the side plate 111 of the winding frame 110, and stably connected to the first shaft 220, and can stably drive the first shaft 220 to have a tendency to approach the drum 120 all the time.

Further, referring to fig. 3, the first shaft 220 is connected to the elastic member 231 through the second connecting plate 233; the first and

second connection plates

232 and 233 are spaced apart in the radial direction of the drum 120 so that the elastic member 231 can extend in the radial direction of the drum 120, thereby ensuring that the elastic member 231 can stably urge the first shaft 220 to have a tendency to approach the drum 120 all the time.

The first connecting plate 232 includes a first plate, a second plate and a third plate connected in a substantially Z-shape, the first plate is connected to the outer side of the side plate 111 such that the third plate is substantially parallel to and spaced apart from the side plate 111, and the third plate is connected to the elastic member 231.

The connection mode of the first connection plate 232 and the side plate 111 can be selected according to requirements; in this embodiment, the first plate is welded to the side plate 111. In other embodiments, the first plate and the side plate 111 may be integrally formed or connected by a fastener, such as a bolt or a screw.

Referring to fig. 1 and 2, the steel wire rope pre-tightening device 010 of the present embodiment further includes a pre-tightening mechanism 300, where the pre-tightening mechanism 300 includes a pulley assembly 310, and the pulley assembly 310 is used for pre-tightening the steel wire rope to be stored in the drum 120; when the drum 120 receives the steel wire rope, the pulley assembly 310, the pinch roller 210 and the drum 120 are sequentially distributed along the moving path of the steel wire rope; so set up, so that when using this wire rope pretension equipment 010 to accomodate wire rope, pretension with loose pulley assembly 310 earlier, make the wire rope after the pretension pressed between pinch roller 210 and cylinder 120, at last winding, accomodate in cylinder 120, that is to say, when this wire rope pretension equipment 010 accomodates wire rope, not only can utilize loose pulley assembly 310 to carry out the pretension to wire rope, can further utilize pinch roller 210 to press wire rope on cylinder 120, make wire rope can be compact, neat winding on cylinder 120, and then ensure that this wire rope pretension equipment 010 has good pretension effect to wire rope. It should be noted that if the pinch roller 210 is worn and the friction provided to the steel cable is relatively reduced, the pulley assembly 310 of the pre-tightening mechanism 300 can still stably provide a certain pre-tightening force, so that the steel cable can be wound and aligned on the drum 120 relatively tightly. After the steel wire ropes are tightly and neatly arranged in the drum 120, the steel wire ropes cannot sink into the loose steel wire ropes on the lower layer of the drum 120 even if being stressed suddenly, so that the steel wire ropes are smoothly released.

Referring to fig. 1 and 2, the pre-tightening mechanism 300 further includes a supporting frame 321 and a driving assembly 322 disposed on the supporting frame 321, the pulley assembly 310 includes a fixed pulley 311 and a movable pulley 312, a rotating shaft of the fixed pulley 311, a rotating shaft of the movable pulley 312 and a rotating shaft of the drum 120 are disposed in parallel, and the fixed pulley 311 is rotatably connected to the supporting frame 321; the driving assembly 322 is in transmission connection with the movable pulley 312 and is used for driving the movable pulley 312 to approach or move away from the supporting frame 321. When the steel wire rope pre-tightening device 010 is used for winding and storing a steel wire rope, the steel wire rope can be wound on the fixed pulley 311 and the movable pulley 312 for pre-tightening, and then the pre-tightened steel wire rope is pressed between the pinch roller 210 and the roller 120, so that the steel wire rope can be tightly wound on the roller 120, and the phenomena of loosening, irregular arrangement, rope disorder and the like of the steel wire rope are reduced.

It should be noted that, the driving assembly 322 is used to drive the movable pulley 312 to approach or leave the supporting frame 321, that is, the pre-tightening strength of the pulley assembly 310 on the steel wire rope can be adjusted by changing the position of the movable pulley 312, so that the pre-tightening mechanism 300 can provide pre-tightening force for the steel wire rope to be stored under various working conditions. Further, the supporting frame 321 is located outside the drum 120 in a radial direction of the drum 120, and the driving assembly 322 can drive the movable pulley 312 to move in the radial direction thereof to approach or separate from the supporting frame 321.

Referring to fig. 2 and 4, the driving assembly 322 includes a driving member 323 and a third connecting plate 324, the driving member 323 is disposed on the supporting frame 321, the movable pulley 312 is in transmission connection with the driving member 323 through the third connecting plate 324, and the driving member 323 drives the third connecting plate 324 to drive the movable pulley 312 to move along the radial direction of the drum 120; the movable pulley 312 is rotatably connected to the third link plate 324 through a pulley shaft 325, the pulley shaft 325 is disposed parallel to the axis of the drum 120, and the movable pulley 312 can rotate around the pulley shaft 325. In order to make the rotation of the movable pulley 312 more flexible and to avoid excessive friction between the movable pulley 312 and the wire rope, a bearing is interposed between the movable pulley 312 and the sliding shaft. Further, the pulley shaft 325 is fixedly connected to the third connecting plate 324, and the movable pulley 312 is further rotatably connected to the pulley shaft 325 through a bearing.

The connection mode of the driving part 323 and the support frame 321 can be selected according to requirements; in this embodiment, the driving member 323 is connected to the supporting frame 321 via a fastener; it should be appreciated that in other embodiments, the driving member 323 may also be snapped, welded, etc. to the support bracket 321. The type of drive 323 can be selected as desired; in this embodiment, the driving member 323 is an electric push rod; in other embodiments, the driving member 323 can be a hydraulic cylinder.

Referring to fig. 4, the connection mode between the third connecting plate 324 and the driving member 323 can be selected according to the requirement; in this embodiment, the third connecting plate 324 is provided with a plug hole 326, and the driving member 323 is plugged and matched with the plug hole 326. In other embodiments, the third connecting plate 324 and the driving member 323 can be connected by welding, bonding, or the like.

Referring to fig. 2, in order to facilitate the fixed pulley 311 to be disposed on the supporting frame 321, the supporting frame 321 is fixedly connected with a supporting rod 327, and the fixed pulley 311 is rotatably connected with one end of the supporting rod 327 away from the supporting frame 321 through a rotating shaft. In this embodiment, the rotating shaft is fixedly connected to the supporting rod 327, and the fixed pulley 311 is rotatably connected to the rotating shaft through a bearing; it should be understood that in other embodiments, the fixed pulley 311 is fixedly connected to the rotating shaft, and the rotating shaft is rotatably connected to the supporting rod 327; in other embodiments, the fixed pulley 311 is rotatably connected to a rotating shaft, which is rotatably connected to the support bar 327. The connection mode of the supporting rod 327 and the supporting frame 321 can be selected according to the requirement; in this embodiment, the supporting rod 327 is welded to the supporting frame 321; in other embodiments, the support bar 327 can be integrally formed with the support frame 321, and can be screwed or connected by a fastener, such as a bolt or a screw. In order to make the rotation of the fixed pulley 311 more flexible and avoid excessive friction between the wire rope and the fixed pulley 311, a bearing is interposed between the fixed pulley 311 and the rotating shaft.

It should be noted that the number of the driving assemblies 322 is the same as that of the movable pulleys 312, and the driving assemblies are arranged in a one-to-one correspondence; the number of the fixed pulleys 311 and the number of the movable pulleys 312 in the pulley assembly 310 can be selected according to needs; in this embodiment, the pulley assembly 310 includes two fixed pulleys 311 and three movable pulleys 312, and one fixed pulley 311, three movable pulleys 312 and another fixed pulley 311 are sequentially distributed at intervals along a direction from the roller 120 to the roller 120; the wire rope to be stored is sequentially wound around the fixed pulley 311 far away from the drum 120, the three movable pulleys 312 and the fixed pulley 311 near the drum 120, and then is pressed between the pinch roller 210 and the drum 120 and then is stored in the drum 120.

It should be noted that each movable pulley 312 has a first position close to the supporting frame 321 and a second position far from the supporting frame 321; when the pre-tightening mechanism 300 is used, the positions of the three movable pulleys 312 are sequentially configured to be located at the second position, the first position and the second position along the direction from the position close to the roller 120 to the position far from the roller 120, or the positions of the three movable pulleys 312 are sequentially configured to be located at the first position, the second position and the first position; in this way, the wire rope is pre-tensioned by means of the movable pulleys 312 alternately arranged at the first position and the second position. It should be understood that, in other embodiments, when the pretensioning mechanism 300 is used, it is not necessary to alternately distribute the plurality of movable pulleys 312 at the first position and the second position, and all of the movable pulleys 312 may be located at the first position or the second position, which is not particularly limited herein.

In order to make the pre-tightening effect of the pre-tightening mechanism 300 on the wire rope better, in the present embodiment, the first position and the second position of the movable pulley 312 are respectively located on both sides of the fixed pulley 311 in the radial direction of the drum 120.

The steel wire rope pre-tightening device 010 of the embodiment further comprises a controller, the roller 120 is provided with an encoder and a pressure sensor which are in communication connection with the controller, the steel wire rope is connected with a lifting hook, the encoder is used for detecting the steering direction of the roller 120, and the pressure sensor is used for detecting the load of the lifting hook; when the drum 120 is winding, the encoder sends a first detection signal to the controller; when the pressure sensor detects that the lifting hook is unloaded, a second detection signal is sent to the controller; the controller is configured to control the driving component to drive the movable pulley to be close to or far away from the supporting frame according to the first detection signal and the second detection signal. The encoder and the pressure sensor are both coaxially and fixedly connected with the drum 120, for example, both the encoder and the pressure sensor may be fixedly connected with the first rotating shaft 121.

Further, the driving members 323 corresponding to the three movable pulleys 312 are all in communication connection with the controller; when the steel wire rope is unwound, the encoder detects that the drum 120 rotates clockwise; when the steel wire rope is taken up, the encoder can detect that the roller 120 rotates anticlockwise, the encoder sends a first detection signal to the controller, at the moment, the lifting hook is unloaded, the pressure value detected by the lifting hook no-load pressure sensor is smaller than the pressure value when the lifting hook carries a heavy object, the pressure sensor can also be considered to detect that the pressure value is very small, and the pressure sensor sends a second detection signal to the controller; the controller controls all the driving members 323 to drive the corresponding movable pulleys 312 to move according to the first detection signal and the second detection signal, and the positions of the three movable pulleys 312 are sequentially configured to be located at the second position, the first position and the second position along the direction from the position close to the roller 120 to the position far away from the roller 120, or the positions of the three movable pulleys 312 are sequentially configured to be located at the first position, the second position and the first position, so that the steel wire rope can shuttle between the fixed pulley 311 and the movable pulley 312 of the pulley assembly 310, and the steel wire rope is pre-tensioned through friction. If the encoder detects that the drum 120 rotates counterclockwise and the pressure sensor detects that the pressure value is very small, both of the conditions cannot be satisfied at the same time, that is, the controller cannot receive the first detection signal and the second detection signal at the same time, the controller does not control the driving member 323 to operate.

It should be understood that in other embodiments, the driving members 323 corresponding to the three movable pulleys 312 are independently controlled by different control switches or controllers, that is, the form in which the controller controls the driving members 323 to drive the movable pulleys 312 to move is not limited to the above form, as long as the movable pulleys 312 can be driven to move to a state capable of automatically pre-tightening the steel wire rope.

The communication connection includes an electrical connection using an electrical wire, or a wireless communication connection using a wireless network or other technologies.

It should be understood that in other embodiments, the pulley assembly 310 may include only the fixed pulley 311 and not the movable pulley 312, and the number of the fixed pulleys 311 may be one, two, etc., and is not particularly limited herein; in other embodiments, the pulley assembly 310 may include only the movable pulley 312 and not the fixed pulley 311, and the number of the movable pulleys 312 may be one, two, etc., and is not particularly limited herein; in other embodiments, the pulley assembly 310 includes both the fixed pulley 311 and the movable pulley 312, the number of the fixed pulley 311 may also be one, three, etc., and the number of the movable pulley 312 may also be one, two, etc., which is not limited herein.

It should be noted that, the steel wire rope pre-tightening device 010 of this embodiment can pre-tighten the steel wire rope through the pulley assembly 310, and a pre-tightening winch is not required to be configured to pre-tighten the steel wire rope, so that the space occupied by the steel wire rope pre-tightening device 010 can be greatly saved. And the pre-tightening winch can only be used in an assembly state, the steel wire rope pre-tightening device 010 in the embodiment can be used in a working state, and automatic pre-tightening and non-pre-tightening of the steel wire rope can be realized according to the requirements of users.

Referring to fig. 1, the pre-tightening mechanism 300 of the present embodiment further includes a sliding assembly 330, the supporting frame 321 is slidably connected to the sliding assembly 330, and the supporting frame 321 is configured to move along the axial direction of the drum 120 relative to the sliding assembly 330; when the supporting frame 321 can move along the axial direction of the roller 120 relative to the sliding assembly 330, the pulley assembly 310 disposed on the supporting frame 321 can move synchronously with the supporting frame 321; in this way, when the wire rope is sequentially wound around the fixed pulley 311 and the movable pulley 312 of the pulley assembly 310, and then pressed between the pinch roller 210 and the drum 120, and finally wound around and stored in the drum 120, because the wire rope is wound around the drum 120 one turn in the axial direction of the drum 120, the fixed pulley 311 and the movable pulley 312 of the pulley assembly 310 rotate around their respective axes under the friction action of the wire rope, and the pulley assembly 310 is also subjected to the friction action of driving the wire rope to move in the axial direction of the drum 120, that is, under the friction action of the fixed pulley 311 and the movable pulley 312, the pulley assembly 310 and the support frame 321 have a tendency to move in the axial direction of the drum 120 relative to the sliding assembly 330, so as to ensure that the wire rope to be stored is always kept in a pre-tightened state by being wound around the pulley assembly 310, and further ensure that the wire rope can be tightly and neatly wound and.

The sliding assembly 330 can be selected as desired; in this embodiment, the sliding assembly 330 includes a sliding rail assembly, for example: ball slide rail etc. and the slide rail subassembly is including deciding the slide rail and with deciding slide rail sliding fit's movable slide rail, decides the slide rail and all extend along the axial of cylinder 120 with the length of moving the slide rail, support frame 321 with move slide rail fixed connection to make support frame 321 and movable slide rail synchronous relative to deciding the slide rail and extend along the axial of cylinder 120. It should be understood that in other embodiments, the sliding assembly 330 may further include a guide rail having a sliding groove, the length of the sliding groove extends along the axial direction of the roller 120, and the supporting frame 321 is slidably inserted into the sliding groove; the sliding assembly 330 is not particularly limited and may be replaced by those skilled in the art according to the related art.

It should be noted that the sliding assembly 330 can be fixedly connected to the body of the crane, so that the supporting frame 321 and the pulley assembly 310 can stably slide relative to the sliding assembly 330.

Referring to fig. 1, the steel wire rope pre-tightening device 010 of the embodiment further includes a rope guiding mechanism 400, the pinch roller 210 and the pre-tightening mechanism 300 are located between the rope guiding mechanism 400 and the winch 100, the rope guiding mechanism 400 includes a second shaft 410 and a rope guiding assembly 420 disposed on the second shaft 410, an axis of the second shaft 410 is parallel to a central axis of the drum 120, and the rope guiding assembly 420 is used for guiding the steel wire rope to be stored and is configured to be capable of moving along an axial direction of the second shaft 410. In this way, when the drum 120 is required to accommodate the wire rope, the wire rope sequentially passes through the wire guide 400, the pulley assembly 310, and the pinch roller 210, and finally winds around the drum 120, so that the wire rope can be guided by the wire guide 420 to move in the direction in which the wire rope is more stably engaged with the pulley assembly 310 and the pinch roller 210.

The second shaft 410 is a threaded shaft, and the guide rope assembly 420 is threadedly engaged with the threaded shaft, so that the guide rope assembly 420 can move in the axial direction of the drum 120 relative to the threaded shaft when the threaded shaft rotates around its own axis. Further, the threaded shaft is a bidirectional threaded shaft.

Further, referring to fig. 1, the rope guiding mechanism 400 of the present embodiment further includes a second sprocket 113 in transmission connection with the threaded shaft; the steel cable pretensioning device 010 further comprises a chain 114, and the first chain wheel 112 and the second chain wheel 113 are used for supporting the chain 114; in this way, when the driving mechanism drives the drum 120 to rotate, the first chain wheel 112 and the second chain wheel 113 rotate synchronously, so that when the steel wire rope is wound around the drum 120 for one turn, the rope guiding assembly 420 on the threaded shaft can move along the axial direction of the drum 120 synchronously with the pressing wheel 210, that is, when the steel wire rope is wound around the drum 120 for one turn along the axial direction of the drum 120, the pressing wheel 210 moves along the winding direction of the steel wire rope on the drum 120 for one turn, and the rope guiding assembly 420 also moves along the winding direction of the steel wire rope on the drum 120 for one turn.

In order to simplify the structure of the wire rope pretensioning device 010, in the present embodiment, the first chain wheel 112 is fixedly connected coaxially with the drum 120, and the second chain wheel 113 is fixedly connected coaxially with the threaded shaft. It should be understood that in other embodiments, the first sprocket 112 may also be drivingly connected to the drum 120 through a gear assembly or the like; similarly, the second chain wheel 113 can also be in transmission connection with the threaded shaft through a gear assembly or the like.

In order to fix the second shaft 410 more stably, referring to fig. 1, the rope guiding mechanism 400 of the present embodiment further includes two mounting plates 411 distributed at intervals, and two axial ends of the second shaft 410 are rotatably connected to the two mounting plates 411 respectively; further, each mounting plate 411 is provided with a bearing, and the second shaft 410 is rotatably connected to the mounting plate 411 by the bearing. The mounting plate 411 may be fixedly connected to a body of the crane, so that the second shaft 410 and the rope guide assembly 420 provided to the second shaft 410 may be more stably positioned with respect to the winch 100 and the pretensioner mechanism 300, and thus the wire rope may be stably guided and pretensioned.

Referring to fig. 5 and 6, the rope guiding mechanism 400 of the present embodiment further includes a connecting assembly 430 disposed on the second shaft 410, and the connecting assembly 430 is configured to move along the axial direction of the second shaft 410; the rope guiding assembly 420 includes two rope guiding wheels 421, wherein the two rope guiding wheels 421 are rotatably disposed on the connecting assembly 430, and a rope guiding gap 422 is formed between the outer circumferential surfaces of the two rope guiding wheels 421. In this way, the wire rope can be stably held between the outer circumferential surfaces of the two sheaves 421, and a good guiding function can be ensured.

The two rope guide pulleys 421 are spaced apart from each other so that the wire rope can pass through a gap between the two rope guide pulleys 421, and the wire rope is guided by the outer circumferential surfaces of the two rope guide pulleys 421.

In order to make the steel wire rope pre-tightening device 010 suitable for a crawler crane with a constantly changing boom angle, or in order to adapt to different hoisting heights, when the steel wire rope enters between the two rope guide wheels 421, the vertical angles are different. In this embodiment, the connection assembly 430 includes a rotation block 431 and a shaft sleeve 432, the rotation block 431 is rotatably sleeved on the shaft sleeve 432, and the rope guide wheel 421 is rotatably connected to the rotation block 431; the shaft sleeve 432 is sleeved on the second shaft 410, and the shaft sleeve 432 is configured to be capable of moving along the axial direction of the second shaft 410 and drive the rotating block 431 and the rope guide wheel 421 to move along the axial direction of the second shaft 410; in this way, not only can the shaft sleeve 432 move along the axial direction of the drum 120 relative to the second shaft 410, but also the rope guide wheel 421 and the rotating block 431 can synchronously rotate around the axial direction of the second shaft 410, so that the steel wire rope can be clamped between the outer peripheral surfaces of the two rope guide wheels 421 from different angles.

Further, referring to fig. 5 and 6, the rope guide 421 is rotatably connected to the rotating block 431 by a wheel shaft 423; still further, the deflector sheave 421 is rotatably connected to the axle 423 by a bearing, and the axle 423 is fixedly connected to the rotating block 431. The connection mode of the wheel shaft 423 and the rotating block 431 can be selected according to requirements; in this embodiment, one end of the axle 423 away from the rope guide wheel 421 is connected with the rotating block 431 by screw threads; in other embodiments, the end of the axle 423 away from the pulley 421 may be connected to the rotating block 431 by welding or integrally molding. It should be appreciated that in other embodiments, the end of the axle 423 distal from the deflector wheel 421 can also be rotatably coupled to the rotation block 431.

Referring to fig. 5, the connecting assembly 430 of the present embodiment includes two rotating blocks 431 and two shaft sleeves 432, the two rotating blocks 431 and the two shaft sleeves 432 are correspondingly matched one by one, and the two rotating blocks 431 and the two rope guiding wheels 421 are correspondingly arranged one by one; connecting assembly 430 further includes a tab 433 connected between two rotating blocks 431; in this way, the gap between the two rotating blocks 431 can be adjusted by using the adjusting piece, and then the gap between the two rope guide wheels 421 can be adjusted, so that the rope guide assembly 420 can guide the steel wire ropes with different diameters.

Specifically, referring to fig. 5, each rope guiding mechanism 400 may be configured with a plurality of adjustment sheets 433 with different lengths, and both ends of each adjustment sheet 433 can be detachably connected to the rotating block 431, for example: and the adjusting sheet 433 with the corresponding length is selected according to the diameter of the steel wire rope. It should be understood that, in some embodiments, the adjustment sheet 433 is provided with a plurality of fixing holes, and the plurality of fixing holes are sequentially distributed at intervals along the length of the adjustment sheet 433, and the adjustment sheet 433 is detachably connected with the two rotating blocks 431 through two fasteners, so that the purpose of adjusting the distance between the rotating blocks 431 can be achieved by selecting different fixing holes to match with the fasteners.

In order to more stably move the guide rope assembly 420, the pulley assembly 310, and the supporting bracket 321 in the axial direction of the drum 120 when the wire rope is received by the wire rope preloading device 010. Referring to fig. 1, the rope guiding mechanism 400 further includes a guiding plate 440, one end of the guiding plate 440 is in threaded connection with the threaded shaft, and the other end is fixedly connected with the supporting frame 321; therefore, when the driving mechanism drives the roller 120 to rotate and the driving rope guiding assembly 420 synchronously moves along the axial direction of the roller 120 on the threaded shaft, the supporting frame 321 and the pulley assembly 310 are synchronously driven to move along the axial direction of the roller 120. Further, the guide plate 440 can be fixedly connected to any one of the two rotating blocks 431, so as to further improve the stability of the guide rope assembly 420, the pulley assembly 310 and the supporting frame 321 moving along the axial direction of the drum 120 in synchronization.

The working process of the steel wire rope pre-tightening device 010 provided by the embodiment includes: the driving piece 323 corresponding to each movable pulley 312 drives the movable pulley 312 to move to the first position or the second position; passing the wire rope between the two rope guide wheels 421, and clamping and guiding the wire rope by the outer peripheral surfaces of the two rope guide wheels 421; the steel wire rope passing through the rope guide assembly 420 sequentially shuttles and winds on the corresponding fixed pulley 311 and the movable pulley 312 from one end far away from the drum 120 to one end close to the drum 120; finally, the wire rope is pressed between the pinch roller 210 and the drum 120, and finally the wire rope is stored and wound around the drum 120.

In summary, when the steel wire rope is stored in the steel wire rope pre-tightening device 010 according to the embodiment of the present invention, on one hand, the pre-tightening mechanism 300 can be used to pre-tighten the steel wire rope, and on the other hand, the pinch roller 210 can be used to press the steel wire rope between the pinch roller 210 and the drum 120, so as to ensure that the steel wire rope pre-tightening device 010 has a good pre-tightening effect.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel wire rope pre-tightening device is characterized by comprising a winding device, a rope pressing device and a pre-tightening mechanism,

the winch comprises a winch frame and a roller which is rotatably arranged on the winch frame, and the roller is used for accommodating a steel wire rope;

the rope pressing device comprises a pressing wheel, a first shaft and an adjusting component, the adjusting component is arranged on the hoisting frame, the first shaft is connected with the adjusting component, and the first shaft and the axis of the roller are distributed at intervals; the pressing wheel is rotatably sleeved on the first shaft; the adjusting assembly is configured to enable the first shaft to always have a tendency to approach the roller along the radial direction of the roller and enable the pressing wheel to always have a tendency to press against the roller so as to press the steel wire rope to be stored between the pressing wheel and the roller; when the steel wire rope pressed between the pressing wheel and the roller is accommodated in the roller, the pressing wheel can move along the axial direction of the first shaft;

the pre-tightening mechanism comprises a pulley assembly, and the pulley assembly is used for pre-tightening the steel wire rope to be accommodated in the roller;

when the roller contains the steel wire rope, the pulley assembly, the pinch roller and the roller are sequentially distributed along the moving path of the steel wire rope.

2. The steel wire rope pre-tightening device according to claim 1, wherein the hoisting frame comprises two side plates which are oppositely distributed, and two axial ends of the roller are respectively and rotatably connected to the two side plates; each side plate is provided with a guide groove, and the length of each guide groove extends along the radial direction of the roller; the two axial ends of the first shaft are respectively in slidable splicing fit with the guide grooves of the two side plates;

the adjustment assembly includes an elastic member connected between the side plate and the first shaft, the elastic member being configured to cause the first shaft to always have a tendency to approach the roller and the pressure roller to always have a tendency to press against the roller.

3. The steel wire rope pre-tightening device according to claim 1, wherein the pre-tightening mechanism further comprises a support frame and a driving assembly arranged on the support frame, the pulley assembly comprises a fixed pulley and a movable pulley, a rotating shaft of the fixed pulley, a rotating shaft of the movable pulley and a rotating shaft of the roller are arranged in parallel, and the fixed pulley is rotatably connected to the support frame; the driving assembly is in transmission connection with the movable pulley and is used for driving the movable pulley to be close to or far away from the supporting frame.

4. The wire rope pretensioning apparatus according to claim 3, wherein the pretensioning mechanism further comprises a slide assembly, the support frame is slidably connected with the slide assembly, and the support frame is configured to be movable relative to the slide assembly in an axial direction of the drum; and/or the presence of a gas in the gas,

the steel wire rope pre-tightening device further comprises a controller, the roller is provided with an encoder and a pressure sensor which are in communication connection with the controller, the steel wire rope is connected with a lifting hook, the encoder is used for detecting the steering direction of the roller, and the pressure sensor is used for detecting the load of the lifting hook; when the rope is wound on the roller, the encoder sends a first detection signal to the controller; when the pressure sensor detects that the lifting hook is unloaded, sending a second detection signal to the controller; the controller is configured to control the driving assembly to drive the movable pulley to approach or move away from the supporting frame according to the first detection signal and the second detection signal.

5. The steel wire rope pre-tightening device according to any one of claims 1 to 4, further comprising a rope guide mechanism, wherein the pinch roller and the pre-tightening mechanism are located between the rope guide mechanism and the winch, the rope guide mechanism comprises a second shaft and a rope guide assembly arranged on the second shaft, an axis of the second shaft is parallel to a central axis of the drum, and the rope guide assembly is used for guiding the steel wire rope to be stored and is configured to move along an axial direction of the second shaft.

6. The wire rope pretensioning apparatus according to claim 5, wherein the winch further comprises a first sprocket drivingly connected to the drum; the second shaft is a threaded shaft, the rope guide assembly is in threaded fit with the threaded shaft, and the rope guide mechanism further comprises a second chain wheel in transmission connection with the threaded shaft; the steel wire rope pre-tightening device further comprises a chain, and the first chain wheel and the second chain wheel are used for supporting the chain.

7. The wire rope pretensioning apparatus according to claim 5, wherein the rope guide mechanism further comprises a connection assembly provided to the second shaft, and the connection assembly is configured to be movable in an axial direction of the second shaft; the rope guiding assembly comprises two rope guiding wheels, the two rope guiding wheels are rotatably arranged on the connecting assembly, and a rope guiding gap is formed between the outer peripheral surfaces of the rope guiding wheels.

8. The steel wire rope pre-tightening device according to claim 7, wherein the connecting assembly comprises a rotating block and a shaft sleeve, the rotating block is rotatably sleeved on the shaft sleeve, and the rope guide wheel is rotatably connected to the rotating block; the shaft sleeve is sleeved on the second shaft and configured to move along the axial direction of the second shaft and drive the rotating block and the rope guide wheel to move along the axial direction of the second shaft.

9. The steel wire rope pre-tightening device according to claim 8, wherein the connecting assembly comprises two rotating blocks and two shaft sleeves, the two rotating blocks and the two shaft sleeves are matched in a one-to-one correspondence manner, and the two rotating blocks and the two rope guide wheels are arranged in a one-to-one correspondence manner; the connecting assembly further comprises a trimmer connected between the two rotating blocks, and the trimmer is used for adjusting the gap between the two rope guide wheels.

10. A working machine comprising a wire rope pretensioning apparatus according to any one of claims 1-9.