CN216662292U - Lifting arm system and lifting machine - Google Patents
Lifting arm system and lifting machine Download PDFInfo
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- CN216662292U CN216662292U CN202122853670.6U CN202122853670U CN216662292U CN 216662292 U CN216662292 U CN 216662292U CN 202122853670 U CN202122853670 U CN 202122853670U CN 216662292 U CN216662292 U CN 216662292U
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Abstract
The utility model relates to the field of mechanical equipment, and provides a lifting arm system and a lifting machine. At the initial stage of arm lifting, the lifting rope is in a loose state, when the main jib is pulled up by the main amplitude transformer mechanism, the head end of the main jib drives the tail end of the auxiliary jib to move upwards, the head end of the auxiliary jib is supported on the ground under the action of gravity to move, the acting force of the main jib and the auxiliary jib on the lifting rope is reduced, and the moment is reduced. When the auxiliary arm rotates relative to the main arm until the lifting rope is tensioned, the main arm rotates to drive the head end of the auxiliary arm to be far away from the ground, the head end of the auxiliary arm and the head end of the main arm are pulled up together, the main arm is lifted by a certain angle, the force arm is reduced, and further the moment is reduced. When the main arm rotates to a preset angle, the main amplitude varying mechanism stops moving, and the auxiliary amplitude varying mechanism pulls the auxiliary arm to the preset angle.
Description
Technical Field
The utility model relates to the technical field of mechanical equipment, in particular to a crane boom system and a crane.
Background
The jib of a crawler crane comprises a main jib and an auxiliary jib, which is also called tower jib, when the auxiliary jib is rotatable relative to the main jib. The existing crane boom comprises an external folding tower boom and an internal folding tower boom, wherein the external folding tower boom is more. In recent years, with the national vigorous development of new energy industries, the hoisting requirement of mountain wind power is increased sharply, and the space of a hoisting site is very limited. In order to follow the trend of industry development and meet market demands, the number of the inward folding tower crane which occupies a small hoisting field is increased.
When the conventional inward-folding tower crane lifts the jib, the auxiliary jib and the main jib are usually fixed together through a locking mechanism, and the main jib and the auxiliary jib are pulled up together through a main amplitude transformer mechanism. The arm lifting method needs to drive the main arm and the auxiliary arm to rotate simultaneously when lifting the arm, has large moment, and cannot realize the effects of lifting a long arm and a heavy arm.
SUMMERY OF THE UTILITY MODEL
The utility model provides a folding-in tower jib, which is used for solving the defects that when a folding-in tower jib crane in the prior art lifts a jib, a main jib and an auxiliary jib are locked by a locking mechanism and are lifted together, so that the moment is large, and a long jib and a heavy jib cannot be lifted, and the main jib and the auxiliary jib are respectively lifted, so that the moment in the initial jib lifting stage is reduced.
The utility model provides a cargo boom system, comprising: the rotary table is used for being in rotary connection with a chassis of the crane; the arm support comprises a main arm and an auxiliary arm, the tail end of the main arm is hinged with the rotary table, and the tail end of the auxiliary arm is hinged with the head end of the main arm; the main amplitude varying mechanism is arranged between the rotary table and the main arm and is used for driving the main arm to pitch; the auxiliary luffing mechanism is arranged between the main arm and the auxiliary arm and used for driving the auxiliary arm to pitch; the lifting mechanism comprises a lifting winch, the lifting winch is arranged on the rotary table, the free end of a lifting rope of the lifting winch is connected with the head end of the auxiliary arm, the middle of the lifting rope sequentially bypasses the tail end of the main arm, the head end of the main arm, the tail end of the auxiliary arm, the head end of the auxiliary arm and the tail end of the main arm, and the lifting winch can control the retraction and release of the lifting rope to change the maximum angle at which the auxiliary arm can rotate relative to the main arm.
According to the utility model, the boom system comprises the following components: the bottom end of the main amplitude mast is hinged with the rotary table; the main jib towing part is connected with the top of the main amplitude mast at one end and connected with the head end of the main jib at the other end; the main amplitude-varying winch is arranged on the rotary table, and a main arm traction rope of the main amplitude-varying winch is connected with the top end of the main amplitude-varying mast; the main luffing winch is used for driving the main luffing mast to rotate relative to the rotary table by controlling the retraction of the main jib hauling rope, and the main luffing mast drives the main jib to rotate relative to the rotary table through the main jib hauling part.
According to the utility model, a cargo boom system is provided, the secondary luffing mechanism comprising: the bottom end of the first secondary amplitude mast is hinged with the head end of the main arm, and a first secondary arm traction piece is arranged between the top of the first secondary amplitude mast and the tail end of the main arm; the bottom end of the second secondary variable amplitude mast is hinged with the head end of the main arm, and a second secondary arm traction piece is arranged between the top end of the second secondary variable amplitude mast and the head end of the secondary arm; the first auxiliary amplitude variation winch is arranged at the tail end of the main arm, and a first auxiliary arm traction rope of the first auxiliary amplitude variation winch bypasses the first auxiliary amplitude variation mast and is connected to the top of the second auxiliary amplitude variation mast and used for dragging the second auxiliary amplitude variation mast to rotate towards the direction close to or far away from the first auxiliary amplitude variation mast.
According to the cargo boom system provided by the utility model, a luffing pulley block is arranged between the second sub-boom traction piece and the top of the second sub-luffing mast, a second sub-luffing winch is further arranged at the tail end of the main boom, the free end of a second sub-boom traction rope of the second sub-luffing winch is in winding connection with the luffing pulley block, and the middle part of the second sub-boom traction rope bypasses the middle part of the first sub-luffing mast and the top of the second sub-luffing mast.
According to the cargo boom system provided by the utility model, the middle part of the lifting rope sequentially bypasses the middle part of the main luffing mast, the middle part of the first secondary luffing mast, the middle part of the second secondary luffing mast, the head end of the secondary arm and the tail end of the main arm.
According to the cargo boom system provided by the utility model, the head end of the auxiliary boom is provided with the extending boom, when the main boom and the auxiliary boom are completely unfolded, the included angle between the inner side of the extending boom and the horizontal direction is gamma, wherein gamma is less than 90 degrees, and gamma is more than or equal to 0 degree.
According to the cargo boom system provided by the utility model, the outer side of the tail end of the extension arm is hinged with the outer side of the head end of the auxiliary arm, a limiting mechanism is arranged between the inner side of the tail end of the extension arm and the inner side of the head end of the auxiliary arm, when the limiting mechanism is positioned at a first limiting position, the inner side of the extension arm and the inner side of the auxiliary arm are positioned on the same plane, and when the limiting mechanism is positioned at a second limiting position and the main arm and the auxiliary arm are completely unfolded, the included angle between the inner side of the extension arm and the horizontal direction is gamma.
According to the cargo boom system provided by the utility model, the roller is arranged at the position where the outer side of the head end of the auxiliary boom is intersected with the extending boom.
According to the boom system provided by the utility model, the anti-back-tilting mechanisms are arranged between the main arm and the rotary table and between the auxiliary arm and the main arm.
The utility model also provides a lifting machine comprising a jib system as claimed in any one of the preceding claims and a chassis on which the jib system is arranged.
According to the boom system provided by the utility model, the free end of the lifting rope of the lifting winch sequentially bypasses the tail end of the main arm, the head end of the main arm, the tail end of the auxiliary arm and the head end of the auxiliary arm, then bypasses the tail end of the main arm, finally returns to the head end of the auxiliary arm, and is fixedly connected with the head end of the auxiliary arm. Therefore, when the hoisting winch tensions the hoisting rope, the head end of the auxiliary arm is attached to the tail end of the main arm, the auxiliary arm and the main arm are fixed together, and the relative rotation of the main arm and the auxiliary arm is limited. At the initial stage of arm lifting, the lifting rope is in a certain loose state, when the main amplitude transformer mechanism pulls the main arm, the tail end of the main arm rotates around the rotating platform to lift, the head end of the main arm drives the tail end of the auxiliary arm to move upwards, and at the moment, because the lifting rope is in the loose state, the head end of the auxiliary arm is supported on the ground to move under the action of gravity. When the auxiliary arm rotates relative to the main arm until the lifting rope is tensioned, the main arm drives the head end of the auxiliary arm to be separated from the ground in the rotating and lifting process, and the auxiliary arm and the main arm are pulled together. When the main arm rotates to a preset angle, the main amplitude varying mechanism stops moving, and the auxiliary amplitude varying mechanism pulls the auxiliary arm to the preset angle. According to the boom system provided by the utility model, in the initial boom raising stage, the head end of the auxiliary boom is supported on the ground, so that the acting force of the main boom and the auxiliary boom on the lifting rope is reduced, and the moment is reduced. When the lifting rope is tensioned and the auxiliary arm is separated from the ground, the main arm is lifted by a certain angle, the force arm is reduced, and further the moment is reduced. The crane boom system provided by the utility model solves the problems that in the prior art, when a folded tower boom is lifted, a main boom and an auxiliary boom are required to be simultaneously pulled up, so that the moment is large, and further a crane boom and a long boom cannot be lifted.
Further, the present invention provides a lifting machine having the same advantages as described above, since the lifting arm system is provided as described above.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a boom system of a crawler crane in a folded state, provided by the utility model;
FIG. 2 is an enlarged view taken at A in FIG. 1 according to the present invention;
FIG. 3 is a schematic structural diagram of the initial boom stage of the boom system of the crawler crane according to the present invention;
FIG. 4 is a schematic structural view of the boom system of the crawler crane according to the present invention when the boom is continuously lifted and the lift cords are tensioned in the state of FIG. 3;
FIG. 5 is a schematic structural view illustrating that the jib system of the crawler crane continues to lift the jib in the state of FIG. 4, and the main jib and the auxiliary jib are pulled together;
FIG. 6 is a schematic structural diagram of a boom system of a crawler crane according to the present invention, in which a lifting rope is loosened in the state of FIG. 5, and a sub-boom is rotated to a vertical state under the action of gravity;
FIG. 7 is a schematic structural diagram of a boom system of a crawler crane according to the present invention after the head end of a hoist rope is separated from the tail end of a main boom in the state of FIG. 6;
FIG. 8 is a schematic structural view of a boom system of a crawler crane provided by the present invention in a fully deployed state;
FIG. 9 is an enlarged view at B of FIG. 3 provided by the present invention;
reference numerals:
100: a chassis;
200: a turntable;
301: main arm 302: an auxiliary arm; 303: an extending arm;
304: positioning a rod; 305: positioning a groove; 306: a zipper;
307: a roller;
401: a main variable mast; 402: a main arm towing member; 403: a main amplitude transformer winch;
404: a main arm haulage rope;
501: a first secondary luffing mast; 502: a second auxiliary luffing mast; 503: a first auxiliary variable amplitude winch;
504: a first sub-arm traction member; 505: a second sub-arm traction member; 506: a first sub-arm pull rope;
601: lifting the winch; 602: a lift cord;
700: an auxiliary amplitude-variable pulley block;
801: a second auxiliary variable-amplitude winch; 802: and the second auxiliary arm pulls the rope.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present 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.
The jib system of the present invention is described below with reference to fig. 1 to 9.
The utility model provides a cargo boom system which is mainly installed on a chassis 100 of a crawler crane. The crane boom system comprises a rotary table 200, a boom, a main luffing mechanism, an auxiliary luffing mechanism and a lifting mechanism.
Wherein the turntable 200 is adapted to be rotatably coupled to the crawler chassis 100.
The arm support comprises two foldable parts, namely a main arm 301 and an auxiliary arm 302, wherein the tail end of the main arm 301 is hinged with the rotary table 200, and the rotation axis of the hinged point is along the horizontal direction. The tail end of the auxiliary arm 302 is hinged with the head end of the main arm 301, the rotation axis of the hinged point is along the horizontal direction, and the head end of the auxiliary arm 302 is a free end.
It should be noted that, with the unfolded boom as a reference, one end of the main arm 301 close to the rotary table 200 is a tail end, one end of the main arm 301 far from the rotary table 200 is a head end, one end of the sub-arm 302 close to the main arm 301 is a tail end, and one end of the sub-arm 302 far from the main arm 301 is a head end.
The main amplitude varying mechanism is arranged between the rotary table 200 and the main arm 301, and is used for driving the main arm 301 to pitch. When the main amplitude transformer mechanism is tightened, the main arm 301 can be pulled to rotate from a zero-degree position parallel to the ground to a ninety-degree position perpendicular to the ground. When the main amplitude transformer mechanism is released, the main arm 301 automatically rotates to a zero-degree position parallel to the ground under the action of the gravity of the main arm 301.
The sub-horn is provided between the main arm 301 and the sub-horn 302, and the sub-horn 302 is used to drive the sub-horn 302 to pitch with respect to the main arm 301. When the auxiliary luffing mechanism is tightened, the auxiliary jib 302 can be pulled to rotate in a direction away from the main arm 301, and when the auxiliary luffing mechanism is loosened, the auxiliary jib 302 rotates in a direction close to the main arm 301 under the action of gravity.
The hoisting mechanism comprises a hoisting winch 601, typically the free end of a hoisting rope 602 of the hoisting winch 601 is adapted to be connected to a cargo hook for hoisting a heavy object. In the embodiment of the present invention, the hoisting rope 602 can be used for connecting with the cargo hook, and can be retracted and extended under the control of the hoisting winch 601, so as to change the maximum angle at which the auxiliary jib 302 can rotate relative to the main jib 301.
When the hoisting winch 601 rotates forward, the free end of the hoisting rope 602 retracts toward the hoisting winch 601, and when the hoisting winch 601 rotates backward, the hoisting rope 602 is loosened, and under the action of the weight or the weight of the jib 302, the hoisting rope 602 extends away from the hoisting winch 601.
In order to fix the main arm 301 and the sub-arm 302 by the lifting rope 602, the free end of the lifting rope 602 sequentially bypasses the tail end of the main arm 301, the head end of the main arm 301, the tail end of the sub-arm 302 and the head end of the sub-arm 302, and then the free end continuously bypasses the tail end of the main arm 301 and is finally fixed at the head end of the sub-arm 302. When the lift cord 602 is tightened, the main arm 301 and the sub-arm 302 can be attached and fixed.
According to the boom system provided by the utility model, the folding form of the main arm 301 and the auxiliary arm 302 is the inward folding form, namely when the main arm 301 and the auxiliary arm 302 are folded, the tail end of the main arm 301 is hinged with the rotary table 200, the head end of the main arm 301 horizontally extends in the direction away from the rotary table 200, the tail end of the auxiliary arm 302 is hinged with the head end of the main arm 301, the head end of the auxiliary arm 302 horizontally extends in the direction close to the rotary table 200, and the auxiliary arm 302 is positioned below the main arm 301.
Note that, with reference to the main arm 301 and the sub-arm 302 being folded, the side where the main arm 301 and the sub-arm 302 are close to each other is defined as the inside, and the side where the main arm 301 and the sub-arm 302 are away from each other is defined as the outside.
Hereinafter, a description will be given of a process of converting the boom system provided by the present invention from the folded state to the unfolded state, which is also referred to as a boom in the art.
In the initial stage of boom raising, the lifting rope 602 sequentially bypasses the tail end of the main arm 301, the head end of the main arm 301, the tail end of the sub-arm 302 and the head end of the sub-arm 302, then the free end continuously bypasses the tail end of the main arm 301, and finally is fixed at the head end of the sub-arm 302, so that the lifting rope 602 is in a loose state. At this time, the main luffing mechanism drives the main arm 301 to rotate, so that the head end of the main arm 301 moves upwards, and simultaneously the head end of the main arm 301 drives the tail end of the auxiliary arm 302 to move upwards together, because the lifting rope 602 is in a loose state, under the action of the self gravity of the auxiliary arm 302, the auxiliary arm 302 and the main arm 301 rotate relatively, and within a certain angle range of the rotation of the main arm 301 relative to the ground, the head end of the auxiliary arm 302 is in contact with the ground, or when the main arm 301 rotates to the position before the lifting rope 602 is tensioned, the head end of the auxiliary arm 302 is in contact with the ground, so that the gravity required to be overcome during arm lifting can be reduced, and the moment during arm lifting is effectively reduced.
In the process of rotating the main arm 301, when the auxiliary arm 302 rotates to a certain angle, the lifting rope 602 is tensioned, so that the angles of the main arm 301 and the auxiliary arm 302 are fixed, and when the main arm 301 continues to rotate, the head end of the auxiliary arm 302 is driven to be separated from the ground, at this time, although the main arm 301 and the auxiliary arm 302 are simultaneously pulled up, because the main arm 301 rotates to a certain angle, the horizontal distance between the position where the head end of the main arm 301 is connected with the main amplitude transformation mechanism and the hinge point of the main arm 301 and the turntable 200 is shortened, that is, the moment arm is shortened, so that the moment in arm lifting is effectively reduced.
Further, when the main arm 301 rotates to a set angle, the hoisting rope 602 is loosened, the sub-arm 302 automatically rotates to a state perpendicular to the ground under the action of gravity, the fixed connection between the free end of the hoisting rope 602 and the head end of the sub-arm 302 is released, the hoisting winch 601 rotates in the direction of tightening the hoisting rope 602, the free end of the hoisting rope 602 is separated from the tail end of the main arm 301, the free end of the hoisting rope 602 at this time only sequentially bypasses the tail end of the main arm 301, the head end of the main arm 301, the tail end of the sub-arm 302 and the head end of the sub-arm 302, and after the hoisting rope 602 bypasses the head end of the sub-arm 302, the cargo hook is connected to the free end of the hoisting rope 602.
Further, the auxiliary luffing mechanism drives the auxiliary boom 302 to rotate relative to the main boom 301 until the auxiliary boom rotates to a preset angle, and then the main luffing mechanism continues to drive the main boom 301 to rotate until the main boom rotates to a working angle, for example, the main boom 301 stops rotating when the main boom 301 rotates to a state perpendicular to the ground.
In summary, the boom system according to the present invention can effectively reduce the moment when the boom is raised, and can perform the boom raising operation of the long boom and the heavy boom.
In one embodiment of the present invention, the main luffing mechanism includes a main luffing mast 401, a main jib towing member 402, and a main luffing winch 403.
The included angle between the main luffing mast 401 and the main jib is smaller than 90 degrees, the bottom end of the main luffing mast 401 is hinged to the rotary table 200, and the rotation axis is along the horizontal direction.
The jib towing member 402 can be a pulling plate or a pulling tube, one end of the jib towing member 402 is connected to the top end of the main luffing mast 401, and the other end is connected to the head end of the jib 301, so that when the main luffing mast 401 rotates backward, the main luffing mast 401 drives the jib 301 to rotate through the jib towing member 402.
The main luffing winch 403 is arranged at the position, on the side, away from the main jib 301, of the main luffing mast 401 of the rotary table 200, the free end of a main jib haulage rope 404 of the main luffing winch 403 is connected with the top end of the main luffing mast 401, when the main luffing winch 403 rotates in the direction of tightening the main jib haulage rope 404, the free end of the main jib haulage rope 404 drives the main luffing mast 401 to rotate backwards, and when the main luffing winch 403 rotates in the direction of loosening the main jib haulage rope 404, the main luffing mast 401 is driven to rotate forwards through the main jib haulage part 402 under the action of the gravity of the main jib 301.
Note that the above-mentioned rear indicates a side of main luffing mast 401 away from main jib 301, and the front indicates a side of main luffing mast 401 near main jib 301.
In one embodiment of the utility model, the secondary horn comprises a first secondary horn 501, a second secondary horn 502 and a first secondary horn winch 503.
The first secondary luffing mast 501 is of a truss structure, the bottom end of the first secondary luffing mast 501 is hinged to the head end of the main boom 301, the rotation axis of the first secondary luffing mast 501 is horizontal, a first secondary boom tractor 504 is arranged between the top of the first secondary luffing mast 501 and the tail end of the main boom 301, and the first secondary boom tractor 504 can be a pulling plate or a pulling pipe.
The second secondary luffing mast 502 is also of a truss structure, the bottom end of the second secondary luffing mast 502 is hinged to the head end of the main jib 301, the rotation axis is along the horizontal direction, and the included angle between the second secondary luffing mast 502 and the outer side of the main jib 301 is larger than the included angle between the first secondary luffing mast 501 and the main jib 301. A second sub-jib traction element 505 is arranged between the second sub-luffing mast 502 and the head end of the sub-jib 302, and the second sub-jib traction element 505 can also be a pulling plate or a pulling tube.
The first secondary luffing winch 503 is disposed at the tail end of the primary jib 301, and the first secondary jib haulage rope 506 of the first secondary luffing winch 503 sequentially passes around the bottom of the first secondary luffing mast 501, the top of the first secondary luffing mast 501, and the top of the second secondary luffing mast 502.
The first sub-jib dragging member 504 and the first sub-jib dragging rope 506 drag the first sub-luffing mast 501 in opposite directions and can be considered as a pair of interacting forces, thus ensuring that the angle between the first sub-luffing mast 501 and the main jib 301 is a fixed value.
When the first secondary luffing winch 503 rotates to retract the first secondary jib haulage rope 506, the first secondary jib haulage rope 506 drives the second secondary luffing mast 502 to rotate in a direction close to the first luffing mast, and simultaneously the second secondary luffing mast 502 drives the secondary jib 302 to rotate and unfold relative to the primary jib 301 through the second secondary jib haulage member 505. When the first secondary luffing winch 503 rotates to loosen the first secondary jib hauling rope 506, the secondary jib 302 rotates relative to the primary jib 301 under the action of the gravity of the secondary jib 302, and the secondary jib 302 rotates to drive the second secondary luffing mast 502 to rotate in a direction away from the first secondary luffing mast 501 through the second secondary jib hauling component 505.
In one embodiment of the utility model, a secondary luffing pulley block 700 is further arranged between the second secondary jib towing member 505 and the top end of the second secondary luffing mast 502, a second secondary luffing winch 801 is arranged at the tail end of the main jib 301, the free end of a second secondary jib towing rope 802 of the second secondary luffing winch 801 sequentially passes around the middle portion of the first secondary luffing mast 501 and the top portion of the second secondary luffing mast 502 and then passes around the secondary luffing pulley block 700, the secondary luffing pulley block 700 comprises two pulleys, one of which is fixedly connected with the top end of the second secondary luffing mast 502, and the other of which is connected with the end portion of the second secondary jib towing member 505.
When the second sub-luffing winch 801 rotates to drive the second sub-boom traction rope 802 to tighten, the two pulleys approach each other, and at the moment, the sub-boom 302 rotates in a direction away from the main boom 301 relative to the main boom 301.
In one-step embodiment, guide wheels are arranged in the middle of the main luffing mast 401, in the middle of the first secondary luffing mast 501, in the middle of the second secondary luffing mast 502, at the head end of the secondary jib 302 and at the tail end of the main jib 301. The free end of the hoisting rope 602 of the hoisting winch 601 sequentially bypasses the guide wheels arranged at the middle part of the first secondary luffing mast 501, the middle part of the second secondary luffing mast 502, the head end of the secondary jib 302 and the tail end of the primary jib 301, and is finally fixedly connected with the head end of the secondary jib 302.
In an embodiment of the present invention, the head end of the auxiliary arm 302 is provided with an extending arm 303, and when the main arm 301 and the auxiliary arm 302 are completely unfolded, an included angle between an inner side of the extending arm 303 and a horizontal direction may be γ, where γ is less than 90 °, and γ is greater than or equal to 0 °. With this arrangement, the boom extension arm 303 extends in a direction away from the sub arm 302 and the main arm 301, and the working radius of the boom system can be effectively increased.
If γ is greater than or equal to 90 degrees, the outrigger 303 extends in a direction close to the main arm 301, which reduces the working radius of the boom system. If γ is less than 0 °, the outrigger arm 303 will extend downward, lowering the hoist height of the hoist arm system.
In a further embodiment, the extending arm 303 and the sub-arm 302 are rotatably arranged so that the inner side of the main arm 301 and the inner side of the sub-arm 302 can fit each other after the sub-arm 302 is folded inwards. The outer side of the tail end of the extending arm 303 is hinged with the outer side of the head end of the auxiliary arm 302, and the rotating direction is along the horizontal direction. A positioning rod 304 arranged along the horizontal direction is arranged at one side of the inner side of the tail end of the extending arm 303 close to the auxiliary arm 302, a positioning groove 305 is arranged at the position corresponding to the positioning rod 304 at the inner side of the head end of the auxiliary arm 302, a zipper 306 is arranged between the positioning rod 304 and the positioning groove 305, wherein the positioning rod 304, the positioning groove 305 and the zipper 306 are limiting mechanisms.
When the extending arm 303 rotates, the positioning rod 304 moves toward the positioning slot 305, and after the positioning rod 304 enters the positioning slot 305, the extending arm 303 cannot rotate continuously and is fixed at the angular position, which is the second limiting position, where the angle is γ, and at this time, the extending arm 303 is at the working position.
When the extending arm 303 rotates, and the positioning rod 304 moves in a direction away from the positioning slot 305 and the zipper 306 is straightened, the extending arm 303 cannot rotate continuously and is fixed at the angular position, which is the first limiting position, and at this time, the inner side of the extending arm 303 and the inner side of the sub-arm 302 are located in the same plane.
In the boom system provided by the present invention, the head end of the sub-boom 302 is in contact with the ground and moves on the ground at the initial stage of the boom raising. In order to make the movement of the sub-arm 302 smoother and prevent the friction from damaging the sub-arm 302, a roller 307 may be provided at a position where the outer side of the head end of the sub-arm 302 meets the outwardly extending arm 303, so that the sliding friction may be converted into rolling friction.
In the boom system provided by the present invention, in order to prevent the main arm 301 from moving continuously after being completely unfolded, a backward tilting prevention mechanism is provided between the rear side of the main arm 301 and the turn table 200; similarly, in order to prevent the sub-arm 302 from rotating with respect to the main arm 301 after rotating to the right position, a backward tilting prevention mechanism may be provided between the rear side of the sub-arm 302 and the outer side of the main arm 301.
The anti-backward-tilting mechanism may be a hydraulic oil cylinder, or may be a push rod and a stopper, taking the main arm 301 and the sub-arm 302 as examples, the stopper may be disposed outside the sub-arm 302, the push rod may be disposed on the main arm 301, and when the sub-arm 302 rotates to a preset angle, the top end of the push rod contacts with the stopper to prevent the sub-arm 302 from continuing to rotate.
The utility model also provides a hoisting machine, which comprises the hoisting arm system and the chassis 100, wherein the chassis 100 can be a crawler chassis 100, and the rotary table 200 of the hoisting arm system can be rotatably connected with the top of the crawler chassis 100.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A boom system, comprising:
the rotary table is used for being in rotary connection with a chassis of the crane;
the arm support comprises a main arm and an auxiliary arm, the tail end of the main arm is hinged with the rotary table, and the tail end of the auxiliary arm is hinged with the head end of the main arm;
the main amplitude varying mechanism is arranged between the rotary table and the main arm and is used for driving the main arm to pitch;
the auxiliary luffing mechanism is arranged between the main arm and the auxiliary arm and used for driving the auxiliary arm to pitch;
the lifting mechanism comprises a lifting winch, the lifting winch is arranged on the rotary table, the free end of a lifting rope of the lifting winch is connected with the head end of the auxiliary arm, the middle of the lifting rope sequentially bypasses the tail end of the main arm, the head end of the main arm, the tail end of the auxiliary arm, the head end of the auxiliary arm and the tail end of the main arm, and the lifting winch can control the retraction and release of the lifting rope to change the maximum angle at which the auxiliary arm can rotate relative to the main arm.
2. The boom system of claim 1, wherein the main horn comprises:
the bottom end of the main amplitude mast is hinged with the rotary table;
the main jib towing part is connected with the top of the main amplitude mast at one end and connected with the head end of the main jib at the other end;
the main amplitude-varying winch is arranged on the rotary table, and a main arm traction rope of the main amplitude-varying winch is connected with the top end of the main amplitude-varying mast;
the main luffing winch is used for driving the main luffing mast to rotate relative to the rotary table by controlling the retraction of the main jib hauling rope, and the main luffing mast drives the main jib to rotate relative to the rotary table through the main jib hauling part.
3. The boom system of claim 2, wherein the secondary horn comprises:
the bottom end of the first secondary luffing mast is hinged with the head end of the main arm, and a first secondary arm traction piece is arranged between the top of the first secondary luffing mast and the tail end of the main arm;
the bottom end of the second secondary variable amplitude mast is hinged with the head end of the main arm, and a second secondary arm traction piece is arranged between the top end of the second secondary variable amplitude mast and the head end of the secondary arm;
the first auxiliary amplitude variation winch is arranged at the tail end of the main arm, and a first auxiliary arm traction rope of the first auxiliary amplitude variation winch bypasses the first auxiliary amplitude variation mast and is connected to the top of the second auxiliary amplitude variation mast and used for dragging the second auxiliary amplitude variation mast to rotate towards the direction close to or far away from the first auxiliary amplitude variation mast.
4. The jib system of claim 3, wherein a luffing pulley block is disposed between the second sub-jib towing member and the top of the second sub-luffing mast, and wherein a second sub-luffing winch is disposed at the trailing end of the main jib, wherein a free end of a second sub-jib towing rope of the second sub-luffing winch is routed to the luffing pulley block, and wherein a middle portion of the second sub-jib towing rope is routed to a middle portion of the first sub-luffing mast and a top portion of the second sub-luffing mast.
5. The jib system of claim 3, wherein the middle portion of the lift line sequentially bypasses the middle portion of the primary luffing mast, the middle portion of the first secondary luffing mast, the middle portion of the second secondary luffing mast, the head end of the secondary jib, and the tail end of the primary jib.
6. The boom system according to claim 1, characterized in that the head end of the secondary boom is provided with a cantilever boom, when the primary boom and the secondary boom are fully deployed, the angle between the inside of the cantilever boom and the horizontal direction is γ, wherein γ < 90 ° and γ ≧ 0 °.
7. The boom system according to claim 6, wherein the outer side of the tail end of the outrigger arm is hinged to the outer side of the head end of the auxiliary arm, a limit mechanism is arranged between the inner side of the tail end of the outrigger arm and the inner side of the head end of the auxiliary arm, when the limit mechanism is located at a first limit position, the inner side of the outrigger arm and the inner side of the auxiliary arm are located on the same plane, and when the limit mechanism is located at a second limit position and the main arm and the auxiliary arm are completely unfolded, the included angle between the inner side of the outrigger arm and the horizontal direction is γ.
8. A jib system according to claim 6 or 7, wherein rollers are provided at the location where the outer side of the head end of the secondary jib intersects the outrigger.
9. The boom system of claim 1, wherein anti-back-tipping mechanisms are disposed between the main arm and the turntable and between the secondary arm and the main arm.
10. Hoisting machine, comprising a jib system according to any of claims 1 to 9 and a chassis, the jib system being arranged on the chassis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122853670.6U CN216662292U (en) | 2021-11-17 | 2021-11-17 | Lifting arm system and lifting machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122853670.6U CN216662292U (en) | 2021-11-17 | 2021-11-17 | Lifting arm system and lifting machine |
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| CN216662292U true CN216662292U (en) | 2022-06-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115744676A (en) * | 2022-12-14 | 2023-03-07 | 浙江三一装备有限公司 | Hoisting equipment and arm hoisting method |
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- 2021-11-17 CN CN202122853670.6U patent/CN216662292U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115744676A (en) * | 2022-12-14 | 2023-03-07 | 浙江三一装备有限公司 | Hoisting equipment and arm hoisting method |
| CN115744676B (en) * | 2022-12-14 | 2023-08-22 | 浙江三一装备有限公司 | Lifting equipment and lifting arm method |
| WO2024124831A1 (en) * | 2022-12-14 | 2024-06-20 | 浙江三一装备有限公司 | Hoisting device and arm lifting method |
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