WO2013170567A1 - 起重机超起装置及伸缩臂起重机 - Google Patents

起重机超起装置及伸缩臂起重机 Download PDF

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Publication number
WO2013170567A1
WO2013170567A1 PCT/CN2012/081949 CN2012081949W WO2013170567A1 WO 2013170567 A1 WO2013170567 A1 WO 2013170567A1 CN 2012081949 W CN2012081949 W CN 2012081949W WO 2013170567 A1 WO2013170567 A1 WO 2013170567A1
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WO
WIPO (PCT)
Prior art keywords
super
strut
arm
crane
drawstring
Prior art date
Application number
PCT/CN2012/081949
Other languages
English (en)
French (fr)
Inventor
詹纯新
刘权
李孟寒
宁玮
Original Assignee
中联重科股份有限公司
湖南中联重科专用车有限责任公司
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Application filed by 中联重科股份有限公司, 湖南中联重科专用车有限责任公司 filed Critical 中联重科股份有限公司
Publication of WO2013170567A1 publication Critical patent/WO2013170567A1/zh

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62Constructional features or details
    • B66C23/82Luffing gear
    • B66C23/821Bracing equipment for booms
    • B66C23/826Bracing equipment acting at an inclined angle to vertical and horizontal directions
    • B66C23/828Bracing equipment acting at an inclined angle to vertical and horizontal directions where the angle is adjustable

Definitions

  • the present invention relates to the field of construction machinery, and in particular to a crane super-lifting device and a telescopic crane.
  • the crane super-lifting device is composed of two left and right struts and is connected with the basic arm, and the main pulling rope and the pulling point are arranged as follows: the first tensioning device and the super-lifting strut The movable end is connected to the end of the crane telescopic arm, and the second tensioning device is connected with the movable end of the overhanging strut and the crane turntable or the tail of the main arm.
  • CN 101618840A discloses a telescopic boom crane and its super-lifting device.
  • the super-lifting device is as shown in FIG. 1 , and mainly includes two super-lifting strut 1 symmetrical with the jib plane of the jib, and a main arm arm and an overhanging strut at the end of the telescopic arm 9 of the jib.
  • the first tensioning device 3 at the end of the hoisting is connected to the second tensioning device 4 which is connected to the end of the boom or the turret and the end of the struts 1 .
  • the overhanging strut 1 is connected to the basic arm 8 of the boom via a bottom support.
  • the use of the above-mentioned super-lifting device and the pulling rope and the pulling point arrangement of the super-lifting device effectively reduce the deflection of the boom in the plane of the variable amplitude and the plane of rotation, but cannot simultaneously make the boom in the plane of rotation and change
  • the anti-stability ability of the plane structure is maximized.
  • the anti-stability of the structure of the boom in the plane of rotation and the plane of the variable plane is in the state of “changing and decreasing” with the change of the opening angle of the strut, which limits the further improvement of the crane. It includes lifting performance including working height, amplitude and lifting weight, so the crane can only carry out super-long lifting, but not ultra-high lifting.
  • the present invention is directed to a crane super-lifting device and a telescopic crane to solve the problem that the crane super-lifting device and the telescopic crane in the prior art cannot simultaneously stabilize the lifting arm in the rotating plane and the variable-width plane structure.
  • the ability is maximized, so only the ultra-long lifting can be carried out, and the problem of ultra-high lifting can not be carried out.
  • the present invention provides a crane superlifting device for a telescopic boom crane, the telescopic boom crane including a turntable and a boom, the boom comprising a main arm and a main arm arm disposed at an upper end of the main arm,
  • the main arm includes a basic arm pivotally connected to the turntable and a telescopic arm that can be extended or retracted relative to the basic arm.
  • the crane super-lifting device comprises: an ultra-up strut group, and the super-start strut group includes N super-strength strut.
  • each of the super-pillars has a connecting end and a movable end, and the connecting end is pivotally connected with the basic arm of the telescopic crane;
  • the first tensioning device is connected to each of the super-pillars Between the movable end and the boom above the telescopic arm;
  • the second tensioning device connected Between the movable end of each super-pillar and the tail of the turret or the basic arm;
  • the crane super-lifting device includes a super-long hoisting mode and an ultra-high hoisting mode. Further, in the ultra-long hoisting mode, with the boom as the boundary, the N super-stretching struts are on the opposite side to the inclined side of the basic arm.
  • the N super-pilling struts are distributed around the basic arm.
  • the N super-pilling struts are four super-pushing struts located in the same plane of rotation, and the four super-pushing struts include: a first inner super-pushing strut, which is rotatable relative to the basic arm in a plane of rotation
  • the flank plane of the boom is rotated at a position of 0° to a position at 45° to the plane of the jib of the jib;
  • the first outer struts of the struts are movable in a plane of rotation relative to the first inner struts Rotating from a position at 0° to the first inner super-pivoting strut to a position 90° to the first inner super-pivoting strut;
  • the second inner super-pivoting strut is rotatable relative to the basic arm in a plane of rotation
  • the yaw plane of the boom is rotate
  • the crane super-lifting device comprises the following drawing of the pulling rope and the pulling point:
  • the first tensioning device comprises a pulling rope set
  • the pulling rope set comprises N pulling ropes
  • the N pulling ropes are connected one by one in the N super-lifting Between the movable end of the strut and the main arm.
  • the crane super-lifting device comprises the following cable and pull point arrangement: the telescopic arm comprises at least two telescopic boom sections, and at least two telescopic arms comprise a top telescopic boom section with a top end connecting the main arm arm head and a top telescopic boom section.
  • the super-up strut set includes a first outer super-up strut and a second outer super-up strut located at the outermost side and the first outer super-up strut and the second
  • the N-2 inner side of the outer super-pivoting strut is super-stretched
  • the first tensioning device comprises a drawstring set
  • the drawstring set comprises N drawstrings corresponding to the N super-starting strut
  • the drawstring includes a first outer drawstring and a second outer drawstring and N-2 inner drawstrings between the first outer drawstring and the second outer drawstring; the first outer drawstring and the second outer drawstring respectively Correspondingly connecting the movable end of the first outer super-lifting strut and the second outer super-pilling strut and the main arm arm head, and the N-2 inner inner pulling rope respectively correspondingly connecting the movable ends of the N-2 inner super-starting strut
  • N is a natural number greater than or equal to 4; the number of intermediate telescopic boom segments is two or more; N-2 inner inner drawstrings are respectively connected to the movable ends of the N-2 inner super-starting strut and two The head of the same or different intermediate telescoping section in the middle telescoping section.
  • the crane super-lifting device comprises the following pull rope and pull point arrangement: the boom of the telescopic boom crane further comprises a jib, the jib is connected with the main arm arm head relatively fixedly; the telescopic arm comprises at least two section telescopic arm joints , to The two-section telescopic arm includes a top telescopic boom section connecting the main boom arm head and at least one intermediate telescopic boom section between the top telescopic boom section and the basic arm; the super-stretching strut group includes the first outer side super-located on the outermost side a strut and a second outer super-pivoting strut and N-2 inner super-lifting strut between the first outer super-up strut and the second outer super-pivoting strut; the first tensioning device comprises a drawstring set The drawstring group includes N drawstrings corresponding to the one of the N overhanging stays, and the N drawstring includes a first outer drawstring and a second outer drawstring
  • the auxiliary arm includes an auxiliary extension section stay connected to the auxiliary arm section, and the first outer pull cord and the second outer pull cord are correspondingly connected to the first outer riser strut and the second outer riser strut Active end and auxiliary extension section struts.
  • the crane super-lifting device comprises the following pulling rope and pull point arrangement: the turntable further comprises an auxiliary strut group, the auxiliary strut group comprises at least one auxiliary strut, and the first end of the at least one auxiliary strut is connected with the turntable
  • the second tensioning device includes N tensioning units corresponding to the one of the N overhanging struts; at least a part of the tensioning unit is connected to the movable end of the corresponding overhanging struts and the auxiliary struts are opposite to the first end Two ends.
  • the crane super-lifting device comprises the following pull cord and pull point arrangement: the lifting arm further comprises a fixed extension member fixed to the top end of the main arm arm head, comprising a first lateral fixing portion group and a second lateral direction a fixing portion group, each of the lateral fixing portion groups includes N lateral fixing portions distributed along an outer circumference of the long member; the crane super-lifting device includes an arm-head strut group, and the arm-head strut group includes N-arm supporting rods The inner end portions of the N arm stays are connected in one-to-one correspondence with the N lateral fixing portions of the first lateral fixing portion group or the second lateral fixing portion group; the first tensioning device is connected to the N roots The movable end of the super-pillar is between the outer end of the N-arm strut.
  • the first tensioning device comprises a drawstring set, and the drawstring set comprises N drawstrings corresponding to the N overhanging strut one by one, and each of the N drawstrings is connected to the opposite flush
  • the movable end of the strut is between the outer end of the arm strut.
  • the inner end portions of the N arm studs are connected in one-to-one correspondence with the N lateral fixing portions in the second lateral fixing portion group, and the N super-strength strut and the N-arm strut cross each other Setting;
  • the first tensioning device comprises a drawstring set
  • the drawstring set comprises a 2 drawstring puller
  • the two drawstrings are connected to the movable end of each of the N overhanging stays, and the two pullers are connected
  • the cords are respectively connected to the outer ends of the two arm stays adjacent to the overhanging strut.
  • the present invention also provides a telescopic crane comprising a turret, a hoisting arm and a crane superlifting device connected to the jib.
  • the hoisting arm comprises a main arm and a main arm arm head disposed at an upper end of the main arm, the main arm comprising Pivot connected to the turntable
  • the base arm and the telescopic arm that can be extended or retracted relative to the base arm, wherein the boom raising device is the aforementioned boom raising device.
  • the crane super-lifting device of the invention and the telescopic crane with the crane super-lifting device can realize the ultra-long hoisting mode of the traditional crane and the conventional crane without the change according to the arrangement of the pulling rope and the pulling point.
  • the ultra-high lifting mode allows the main boom to adopt an elevation angle of close to or reaching 90°, which greatly expands the lifting performance of the telescopic crane.
  • FIG. 1 is a perspective view showing a three-dimensional structure of a crane super-lifting device in the prior art
  • FIG. 2 is a second telescopic device connecting a telescopic crane with a super-lifting device in a super-long suspension mode according to an embodiment of the present invention
  • FIG. 3 is a structural schematic view of the first type of drawstring and pull point arrangement of the basic arm tail
  • FIG. 3 is a telescopic boom crane with a super-lifting device according to an embodiment of the present invention.
  • FIG. 1 is a perspective view showing a three-dimensional structure of a crane super-lifting device in the prior art
  • FIG. 2 is a second telescopic device connecting a telescopic crane with a super-lifting device in a super-long suspension mode according to an embodiment of the present invention
  • FIG. 3 is a structural schematic view of the first type of drawstring and pull point arrangement of the basic arm tail
  • FIG. 3 is a telescopic boom crane with a super-
  • FIG. 4 is a structural schematic view of the first type of drawstring and pull point arrangement in the rear of the turntable;
  • FIG. 4 is a telescopic boom crane with a super-lifting device according to an embodiment of the present invention, and the second tensioning device is connected to the turntable in the ultra-long suspension mode
  • FIG. 5 is a schematic structural view of a second type of drawstring and pull point arrangement according to an embodiment of the present invention;
  • FIG. 5 is a telescopic boom crane with a super-lifting device according to an embodiment of the present invention, and the second tensioning device is connected to the turntable in a super-long suspension mode
  • FIG. 6 is a structural schematic view of a third type of drawstring and pull point arrangement;
  • FIG. 4 is a telescopic boom crane with a super-lifting device according to an embodiment of the present invention, and the second tensioning device is connected to the turntable in the ultra-long suspension mode
  • FIG. 5 is a schematic structural view of a second type of drawstring
  • FIG. 6 is a telescopic boom crane with a super-lifting device according to an embodiment of the present invention, and the second tensioning device is connected to the turn in a super-long suspension mode.
  • FIG. 7 is a structural schematic view of a fourth type of drawstring and pull point arrangement in the rear;
  • FIG. 7 is a telescopic boom crane with a super-lifting device according to an embodiment of the present invention, and the second tensioning device is connected to the turntable in a super-long suspension mode
  • FIG. 8 is a structural schematic view of a fifth type of drawstring and pull point arrangement;
  • FIG. 8 is a telescopic crane with a super-lifting device according to an embodiment of the present invention.
  • the second tensioning device is connected to the rear of the turntable in an ultra-high lift mode.
  • a structure diagram of the auxiliary strut group and adopting the sixth type of drawstring and pull point arrangement is a second tensioning device of the telescopic crane with the super-lifting device in the ultra-high suspension mode according to the embodiment of the present invention.
  • a structural schematic diagram of the seventh type of drawstring and pull point arrangement is connected to the rear of the turntable and the auxiliary strut group.
  • the crane super-lifting device of the present invention is used for a telescopic crane, the telescopic crane includes a lower vehicle 110, a rotary table 120 and a lifting arm, and the lifting arm comprises a main arm 140 and a main arm arm 170 disposed at an upper end of the main arm 140,
  • the main arm 140 includes a base arm 141 pivotally coupled to the turret 120 and a telescoping arm 142 that is extendable or retractable relative to the base arm 141.
  • the crane superlifting device includes an overhanging strut group, a first tensioning device, and a second tensioning device.
  • the super-strength strut group includes N super-strength strut.
  • N is a natural number greater than or equal to 3, for example, may be 5, 6, 7, 8, etc., of course, limited by the installation position and control complexity of the super-pillars
  • the super-starting strut group The number of struts is preferably 3 or more and 8 or less.
  • Each of the super-starting strut members has a connecting end and a movable end, and the connecting end is pivotally connected to the basic arm 141 of the telescopic crane.
  • the first tensioning device is coupled between the movable end of each of the overhanging struts and the jib above the telescopic arm.
  • a second tensioning device is coupled between the movable end of each of the overhanging struts and the tail of the turret 120 or the base arm 141.
  • the crane super-lift device can operate in ultra-long-lift mode and ultra-high lift mode.
  • the technical feature of the present invention "above the telescopic arm" includes the telescopic arm itself.
  • the crane super-lifting device and the telescopic crane with the crane super-lifting device can realize the ultra-long hoisting mode of the traditional crane and the super-unsupplied by the traditional crane according to the change of the arrangement of the pulling rope and the pulling point.
  • the ultra-high hoisting mode referred to in the present invention means that the main arm can be suspended with an elevation angle approaching or reaching 90°.
  • the adoption of the ultra-high lifting mode greatly expands the lifting performance of the telescopic crane.
  • the N super-lifting struts are all in the basic arm
  • the N super-pilling struts are distributed around the basic arm 141. More preferably, the N overhanging struts are evenly distributed around the base arm 141. This arrangement allows the main boom of the crane to work stably when approaching or reaching an elevation angle of 90°.
  • the crane refers to a four-bar super-lifting vertical crane (that is, ultra-high lifting). Its working mode mainly includes traditional ultra-long lifting mode, and there are two unique and ultra-high lifting modes.
  • the four super-lifting struts have different opening modes: for example, when the super-long hoisting, there may be a "V" type, an inverted “one” type or a double “V” type opening mode, and this embodiment is In the ultra-long-loading mode, the arrangement of each of the drawstrings and the pull points is described by taking the inverted "one" type as an example; when the ultra-high lifting is carried out, it is preferable that the four stays are evenly distributed along the circumference of the basic arm 141. As shown in FIG. 2 to FIG.
  • the super-stretching strut group 150 is composed of four super-starting struts located in the same plane of rotation, and the four super-starting struts are respectively the first inner super-starting strut 151 and the second inner side.
  • the first inner super-pivoting strut 151 is rotatable relative to the base arm 141 from a position at 0° to the plane of the jib of the jib in a plane of rotation to a position at 45° to the plane of the jib of the jib.
  • the rotary driving device that drives the first inner super-lifting strut 151 may be a first cylinder mounted between the first inner super-lifting strut 151 and the basic arm 141.
  • the plane in which the boom is located when the boom is rotated relative to the base of the basic arm is the plane of the jib of the jib.
  • the first outer super-pivoting struts 154 are rotatable from a position at 0° with the first inner super-pivoting struts 151 to a position with the first inner super-pivoting struts 151 in a plane of rotation with respect to the first inner super-pivoring struts 151. 90° position.
  • the rotary drive for driving the first outer super-pivoting struts 154 may be a fourth cylinder mounted between the first inner super-pivoting struts 151 and the first outer super-pivoting struts 154.
  • the second inner overhanging strut 152 is rotatable relative to the base arm 141 from a position at 0[deg.] to the plane of the jib of the jib in a plane of rotation to a position at 45[deg.] with the plane of the jib of the jib.
  • the rotary driving device that drives the second inner super-lifting strut 152 may be a second cylinder mounted between the second inner super-lifting strut 152 and the base arm 141.
  • the second outer super-pivoting strut 153 is rotatable from a position at 0° to the second inner super-start strut 152 in the plane of rotation with respect to the second inner super-start strut 152 to a position with the second inner super-start strut 152 90° position.
  • the rotary driving device that drives the second outer super-lifting strut 153 may be a third cylinder mounted between the second inner super-up strut 152 and the second outer super-pivoting strut 153.
  • the above arrangement of the super-starting strut group 150 consisting of four super-lifting struts located in the same plane of rotation ensures that the angle between the first inner super-starting strut 151 and the second inner super-starting strut 152 is at least Continuously adjustable from 0° to 90°, the angle between the two adjacent struts of the four super-starting struts of the super-lifting device can be 90°, which is the telescopic crane in the far-reaching In the sling mode, the opening mode of each super-lifting struts is adjusted, and the stability of the boom system is provided in the ultra-high lifting mode.
  • FIG. 2 is a structural schematic view showing the second tensioning device of the telescopic crane with the super-lifting device connected to the tail of the basic arm and adopting the first type of pulling rope and the pulling point arrangement in the ultra-long-lifting mode according to the embodiment of the present invention.
  • FIG. 3 is a structural schematic view showing the second tensioning device of the telescopic crane with the super-lifting device connected to the rear portion of the turntable and adopting the first type of pulling rope and the pulling point arrangement in the ultra-long-lifting mode according to the embodiment of the present invention.
  • the second tensioning device can be connected to the tail of the base arm 141 or to the turntable 120, wherein the second tensioning device comprises four and four super A tensioning unit corresponding to the struts, the tensioning unit may be a drawstring or a pull plate. In an embodiment not shown, it is also possible that a part of the tensioning unit is connected to the turntable and the other A part is connected to the tail of the basic arm. In the following description, only the second tensioning device is the pull plate group 130 and each of the pull plates in the pull plate group 130 is connected to the turntable of the telescopic crane (wherein the pull shown in Figs.
  • the telescopic arm 142 includes a five-section telescopic boom section, which is divided into a top telescopic boom section 142E that connects the main boom arm head 170 and a first to the first between the top telescopic boom section 142E and the basic arm 141.
  • the second tensioning device includes a pull plate set 130, and the pull plate set 130 includes one with four super-strength strut a corresponding four pull plates, wherein the four pull plates are a first outer pull plate 134, a second outer pull plate 133, and two inner pull plates between the first outer pull plate 134 and the second outer pull plate 133 That is, the first inner pull plate 131 and the second inner pull plate 132.
  • Each of the four pull plates is correspondingly connected between the movable ends of the four super-pillars and the rear of the turntable 120.
  • the first tensioning device comprises a drawstring set 160
  • the drawstring set 160 comprises four drawstrings corresponding one to one of the four overhanging struts, the four drawstrings comprising a first outer drawstring 164 and a second outer drawstring 163 And two inner drawstrings between the first outer drawstring 164 and the second outer drawstring 163, namely a first inner drawstring 161 and a second inner drawstring 162.
  • the drawstring is a wire rope.
  • four drawstrings are correspondingly connected between the movable ends of the four overhanging stays and the main arm head 170.
  • FIG. 4 is a structural schematic view showing the second tensioning device of the telescopic crane with the super-lifting device connected to the rear of the turntable and adopting the second type of pulling rope and the pulling point arrangement in the ultra-long-lifting mode according to the embodiment of the present invention.
  • the second type of drawstring and pull point arrangement is different from the first type of drawstring and pull point arrangement in that the first outer pull cord 164 and the second outer pull cord 163 are respectively connected correspondingly.
  • the two inner drawstrings 161 and 162 correspondingly connect the activities of the two inner raised struts 151 and 152 The end and the head of the second intermediate telescoping section 142B.
  • the two inner drawstrings 161 and 162 can also correspondingly connect the movable ends of the two inner overhanging stays 151 and 152 with the first intermediate telescopic boom section 142A, the third intermediate telescopic boom section 142C or the fourth intermediate telescopic arm. Section 142D's head.
  • the second tensioning device is connected in the same manner as the first type of pull cord and pull point.
  • the basic arm 141 is subjected to a large bending moment and the stress condition is poor.
  • the second type of drawstring and pull point arrangement of the crane superlifting device can provide greater pulling force, and the force of the rear section of the main arm is better.
  • the force condition of the telescopic boom section is better than that of the middle and rear section telescopic boom sections. Therefore, the second type of drawstring and pull point arrangement makes the stress state of the main boom more balanced. , can further improve the lifting performance of the telescopic crane.
  • FIG. 5 is a structural schematic view showing the second tensioning device of the telescopic crane with the super-lifting device connected to the rear of the turntable and adopting the third type of pulling rope and the pulling point arrangement in the ultra-long hanging mode according to the embodiment of the present invention.
  • the third type of drawstring and pull point arrangement is different from the second type of drawstring and pull point arrangement in that the first inner drawstring 161 is connected to the first inner overhanging stay 151.
  • the movable end is coupled between the first intermediate telescoping section 142A and the second inner drawstring 162 is coupled between the movable end of the second inner super-pivoting 152 and the third intermediate telescoping section 142C.
  • the connection manner of the other pull cords of the first tensioning device and the connection manner of the second tensioning device are the same as those of the second drawstring and the pull point.
  • the arrangement of the third type of drawstring and pull point shown in Fig. 5 is similar to the arrangement of the pull line arrangement of the second drawstring and pull point arrangement shown in Fig. 4.
  • the main arm is divided into several sections by the drawstring, each of which has a different stress distribution inside the main arm, and the two inner drawstrings can provide different tensioning forces, as shown in the figure.
  • the third type of drawstring and pull point arrangement can make the stress distribution of each section of the main arm more uniform, which can greatly improve the lifting performance of the crane.
  • the pull points of the first tensioning device are distributed on the main arm, and in fact, under the ultra-long lifting condition, one of the crane lifting performance is limited. An important factor is the instability of the jib, so the pull point can also be placed on the jib.
  • 6 is a structural schematic view showing a second tensioning device connected to a rear portion of a turntable in a super-long suspension mode and adopting a fourth type of drawstring and pull point arrangement according to an embodiment of the present invention.
  • the fourth type of drawstring and pull point arrangement is mainly for the condition of super long hanging and using fixed jib.
  • the boom of the telescopic crane also includes a secondary arm that is fixedly coupled to the main boom arm 170.
  • the first outer pull cord 164 and the second outer pull cord 163 are correspondingly coupled to the movable end and the pair of the first outer super-up strut 154 and the second outer super-up strut 153.
  • the arms, preferably the first outer drawstring 164 and the second outer drawstring 163 are connected to the mid-arm midsection.
  • the two inner drawstrings 161 and 162 are correspondingly connected to the movable ends of the two inner overhanging stays 151 and 152 and the main boom arm 170.
  • an auxiliary extension struts may be mounted on the jib to extend the auxiliary extension The long section of the struts is connected to the corresponding drawstring.
  • the second tensioning device is connected in the same manner as the first type of drawstring and pull point. The fourth type of drawstring and pull point arrangement can effectively improve the rigidity and stability of the rear section of the jib.
  • Fig. 7 is a structural schematic view showing the second tensioning device of the telescopic crane with the super-lifting device connected to the rear of the turntable and adopting the fifth type of pulling rope and pulling point arrangement in the ultra-long-lifting mode according to the embodiment of the present invention.
  • the fifth type of drawstring and pull point arrangement shown in Fig. 7 can be used in place of the fourth type of drawstring and pull point arrangement shown in Fig. 6 for fixing the jib.
  • the fifth type of drawstring and pull point arrangement is different from the fourth type of drawstring and pull point arrangement in that the first inner drawstring 161 is coupled to the end of the first inner riser strut 151 and the second telescopic
  • the second inner drawstring 162 connects the movable end of the second inner overhanging strut 152 with the main arm arm 170 between the heads of the arm sections 142B.
  • the two inner drawstrings 161 and 162 may also correspondingly connect the movable ends of the two inner overhanging stays 151 and 152 with the main boom arm head 170 or the intermediate telescopic boom section 142A.
  • the head of any of 142B, 142C, and 142D are examples of any of 142B, 142C, and 142D.
  • the fifth type of drawstring and pull point arrangement is the same as the other parts of the fourth type of drawstring and pull point arrangement, and will not be described again.
  • the fifth type of drawstring and pull point arrangement can further enhance the torsional stability of the boom system compared to the fourth type of drawstring and pull point arrangement.
  • 8 is a telescopic boom crane with a super-lifting device according to an embodiment of the present invention.
  • a second tensioning device is connected to a rear portion of the turntable and an auxiliary strut group, and a sixth type of drawstring and pull point arrangement is adopted.
  • Schematic diagram of the structure As shown in FIG. 8, in the super-height mode, the elevation angle of the main arm approaches or reaches 90°.
  • the crane super-lifting device further includes an auxiliary strut group 121, and the auxiliary strut group 121 includes two An auxiliary strut at the front of the turntable, wherein the first end of each auxiliary strut is connected to the turntable 120.
  • the first inner pull plate 131 is connected to the movable end of the first inner super-lift strut 151 and the rear portion of the turntable 120
  • the second inner pull plate 132 is connected to the second inner super-start support. The movable end of the rod 152 and the rear of the turntable 120.
  • the first inner pull plate 151 and the second inner pull plate 152 are connected to the rear sides of the special weight weight and the movable ends of the corresponding overhanging stays.
  • the two outer pull plates 133 and 134 are respectively connected to the two outer super-starting stays 163 and 164 and the second ends of the two auxiliary stays.
  • the crane boom further includes a fixed extension member 190 fixed to the top end of the main arm arm head 170 and including a first lateral fixing portion group and a second lateral fixing portion group, each laterally fixed
  • the set includes four lateral fixing portions distributed along the outer circumference of the fixed extension member 190.
  • the crane super-lifting device further includes an arm strut group 180, and the arm strut group 180 includes four arm strut rods, that is, first to fourth arm strut rods 181, 182, 183, and 184.
  • the arm strut group is connected to the first lateral fixing portion group or the first lateral fixing portion group, and determines the spatial position of each arm strut of the arm strut group.
  • eight lateral fixing portions are evenly distributed around the outer circumference of the fixed long member 190, wherein each lateral fixing portion of the first lateral fixing portion group is located in the second lateral fixing portion group. Between two adjacent lateral fixing portions.
  • the inner end portions of the four arm stays 181, 182, 183, and 184 are connected in one-to-one correspondence with the four lateral fixing portions of the first lateral fixing portion group.
  • the four super-pillars are disposed substantially in alignment with the four arm-struts;
  • the first tensioning device includes a drawstring set 160, and the drawstring set 160 includes four corresponding four lift-up strut-
  • Each of the four drawstrings 161, 162, 163 and 164 is connected to the movable end of the mutually aligned overhanging strut and the outer end of the arm stay between.
  • FIG. 9 is a telescopic crane with an over-lifting device according to an embodiment of the present invention.
  • the second tensioning device is connected to the rear of the turntable and the auxiliary strut group and adopts a seventh structural schematic diagram.
  • the seventh type of drawstring and pull point arrangement differs from the sixth type of tie puller shown in FIG. 8 in that the inner ends of the four arm stays 181, 182, 183 and 184 are fixed to the second side.
  • the four lateral fixing portions of the group are connected one by one in correspondence, and at this time, the four super-pillars are disposed to intersect with the four arm-struts.
  • each of the arm struts and the super struts are arranged at a 45° staggered arrangement.
  • the first tensioning device comprises a drawstring set 160, and the drawstring set 160 comprises eight drawstrings, and the two movable draw ends of each of the four overhanging stays are connected to the two drawstrings, and two The root cords are respectively connected to the outer ends of the two arm stays adjacent to the overhanging strut. Specifically, as shown in FIG.
  • one end of the pull cord 161A and the pull cord 161B are connected to the movable end of the first inner super-pushing stay 151, and the other end of the pull cord 161A is connected to the first arm-head strut 181,
  • the other end of the pull cord 161B is coupled to the second arm stay 182; one end of the pull cord 162A and the pull cord 162B are coupled to the movable end of the second inner overhanging strut 152, and the other end of the pull cord 162A is coupled to the The second arm stay 182, the other end of the pull cord 162B is connected to the third arm stay 183; one end of the pull cord 163A and the pull cord 163B are connected to the movable end of the second outer riser stay 153, and the drawstring
  • the other end of the 163A is connected to the third arm stay 183, and the other end of the pull cord 163B is connected to the fourth arm stay 184; one end of the pull cord 164A and the pull cord 164
  • the arrangement of the second tensioning device of the seventh pulling rope and the pulling point arrangement is the same as that of the sixth pulling rope and the pulling point, and will not be described in detail.
  • the seventh type of drawstring and pull point arrangement is more complicated, but the arrangement can effectively improve the boom system at 90° elevation.
  • the anti-torsion stability of the boom system can be maximized, so that the boom system is more stable during the rotation of the turntable during the super-lifting.
  • the crane is composed of different amplitudes and arm lengths.
  • the drawing method of the pulling rope and the pulling point of the super-lifting device provided by the embodiment is very flexible, and basically every type of pulling rope and pulling point arrangement corresponds to different working conditions, so that hundreds of working conditions of the crane can be divided.
  • different drawstrings and pull points are arranged for each area, so that the performance of the crane in each lifting area is optimized, so that the overall lifting performance of the crane is comprehensive. Optimize for improvement. It should be noted that, in the two pull cord and pull point arrangement modes of FIG. 6 and FIG.
  • an auxiliary extension section stay can be disposed above the auxiliary arm, but the various pull cords and pull points shown in FIG. 2 to FIG. 5
  • the auxiliary extension struts may also be arranged at corresponding positions of the main arm heads, and the corresponding extension ropes and the main arm arms are connected by the auxiliary extension struts, and the auxiliary extension struts may further enhance the arms.
  • the first tensioning device is described by taking a single rope tensioning as an example in various pulling rope and pulling point arrangement manners, but it is also possible to set a fixed pulley by the front pulling point of the first tensioning device. Therefore, the double-row rope is used to tighten and the like.
  • the crane super-lifting device and the telescopic crane having the crane super-lifting device can realize the conventional crane according to the change of the pulling rope and the arrangement of the pulling points.
  • the ultra-long lifting mode can realize the ultra-high lifting mode that is not available in traditional cranes, so that the main arm can adopt an elevation angle of close to or reaching 90°.
  • the front pull-up points of the first tensioning device of the crane super-lifting device may be arranged at the same position, or may be separately arranged; may be arranged on the main arm or on the auxiliary arm, for the advantages and disadvantages of each mode, It can be applied to different lifting conditions, so that the overall lifting performance of the telescopic crane with the super-lifting device is fully improved.
  • the first tensioning device may be arranged in one-to-one correspondence between the super-pillars and the arm-head strut during the ultra-high lifting, or may be arranged in a pair of two for the two arm-struts.
  • the former has simple control and can greatly improve the rigidity and stability of the boom system during ultra-high lifting; the latter control and structure are more complicated, but the arrangement can effectively improve the boom system at 90° elevation.
  • the anti-torsion stability of the boom system can be maximized, so that the boom system is more stable during the rotation of the turntable during the super-lifting.

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Abstract

一种用于伸缩臂起重机的起重机超起装置,包括:超起撑杆组(150),超起撑杆组包括N根超起撑杆(151,152,153,154),其中N为大于或等于3的自然数,每根超起撑杆具有连接端和活动端,连接端与伸缩臂起重机的基本臂(141)枢接;第一拉紧装置,连接于每根超起撑杆的活动端和位于伸缩臂以上的起重臂之间;第二拉紧装置,连接于每根超起撑杆的活动端与转台(120)或基本臂(141)的尾部之间;并且,起重机超起装置包括超远吊载模式和超高吊载模式。本发明还包括带有起重机超起装置的伸缩臂起重机。本发明根据拉绳及拉点布置方式的变化,既可实现传统起重机的超远吊载模式,又可实现传统起重机所不具备的超高吊载模式,而超高吊载模式的采用很大程度上拓展了伸缩臂起重机的起重性能。

Description

起重机超起装置及伸缩臂起重机 技术领域 本发明涉及工程机械领域, 具体而言涉及一种起重机超起装置及伸缩臂起重机。 背景技术 现有技术中,起重机超起装置中超起撑杆般由左右两根撑杆组成并与基本臂相连, 其主要拉绳及拉点布置方式为: 第一拉紧装置与超起撑杆活动端和起重机伸缩臂端部 连接, 第二拉紧装置与超起撑杆活动端和起重机转台或主臂尾部连接。 公开号为 CN 101618840A 的中国专利申请公开了一种伸缩臂起重机及其超起装 置。 该超起装置如图 1所示, 主要包括与起重臂变幅平面左右对称的两根超起撑杆 1, 与起重臂的伸缩臂 9端部的主臂臂头和超起撑杆 1端部的卷扬相连的第一拉紧装置 3, 与起重臂尾部或转台和超起撑杆 1端部卷扬相连的第二拉紧装置 4。 超起撑杆 1通过 底部支座与起重臂的基本臂 8连接。 使用以上的超起装置和该超起装置的拉绳及拉点布置方式虽然有效地降低了起重 臂在变幅平面和回转平面内的挠度, 但无法同时使起重臂在回转平面和变幅平面结构 抗失稳能力最大化, 起重臂在回转平面和变幅平面内的结构抗失稳能力随着撑杆张开 角的变化, 处于"此消彼长"的状态, 限制了起重机进一步提高其包括工作高度、 幅度 和吊载重量等在内的起重性能, 因此起重机仅能进行超远吊载, 而不能进行超高吊载。 发明内容 本发明旨在提供一种起重机超起装置及伸缩臂起重机, 以解决现有技术中的起重 机超起装置和伸缩臂起重机无法同时使起重臂在回转平面和变幅平面结构抗失稳能力 最大化, 因而仅能进行超远吊载, 不能进行超高吊载的问题。 为了实现该目的, 本发明提供了一种起重机超起装置, 用于伸缩臂起重机, 伸缩 臂起重机包括转台和起重臂, 起重臂包括主臂和设置于主臂上端的主臂臂头, 主臂包 括与转台相枢接的基本臂和相对基本臂可伸出或缩回的伸缩臂,起重机超起装置包括: 超起撑杆组, 超起撑杆组包括 N根超起撑杆, 其中 N为大于或等于 3的自然数, 每根 超起撑杆具有连接端和活动端,连接端与伸缩臂起重机的基本臂枢接; 第一拉紧装置, 连接于每根超起撑杆的活动端和位于伸缩臂以上的起重臂之间; 第二拉紧装置, 连接 于每根超起撑杆的活动端与转台或基本臂的尾部之间; 并且, 起重机超起装置包括超 远吊载模式和超高吊载模式。 进一步地, 在超远吊载模式下, 以起重臂为界, N根超起撑杆均处于与基本臂的 倾斜侧相反的一侧。 进一步地, 在超高吊载模式下, N根超起撑杆分布在基本臂的四周。 进一步地, N根超起撑杆为位于同一转动平面内的四根超起撑杆, 四根超起撑杆 包括: 第一内侧超起撑杆, 可相对于基本臂在转动平面内从与起重臂的变幅平面成 0° 的位置旋转至与起重臂的变幅平面成 45°的位置; 第一外侧超起撑杆, 可相对于第一 内侧超起撑杆在转动平面内从与第一内侧超起撑杆成 0°的位置旋转至与第一内侧超起 撑杆成 90°的位置; 第二内侧超起撑杆, 可相对于基本臂在转动平面内从与起重臂的 变幅平面成 0°的位置旋转至与起重臂的变幅平面成 45°的位置; 第二外侧超起撑杆, 可相对于第二内侧超起撑杆在转动平面内从与第二内侧超起撑杆成 0°的位置旋转至与 第二内侧超起撑杆成 90°的位置。 进一步地, 起重机超起装置包括如下拉绳及拉点布置方式: 第一拉紧装置包括拉 绳组, 拉绳组包括 N根拉绳, N根拉绳一一对应地连接在 N根超起撑杆的活动端和主 臂臂头之间。 进一步地, 起重机超起装置包括如下拉绳及拉点布置方式: 伸缩臂包括至少两节 伸缩臂节, 至少两节伸缩臂包括顶端连接主臂臂头的顶部伸缩臂节和位于顶部伸缩臂 节和基本臂之间的至少一个中间伸缩臂节; 超起撑杆组包括位于最外侧的第一外侧超 起撑杆和第二外侧超起撑杆及位于第一外侧超起撑杆和第二外侧超起撑杆之间的 N-2 根内侧超起撑杆; 第一拉紧装置包括拉绳组, 拉绳组包括与 N根超起撑杆一一对应的 N根拉绳, N根拉绳包括第一外侧拉绳和第二外侧拉绳及位于第一外侧拉绳和第二外 侧拉绳之间的 N-2根内侧拉绳; 第一外侧拉绳和第二外侧拉绳分别对应地连接第一外 侧超起撑杆和第二外侧超起撑杆的活动端和主臂臂头, N-2 根内侧拉绳分别对应地连 接 N-2根内侧超起撑杆的活动端与至少一个中间伸缩臂节的头部。 进一步地, N为大于或等于 4 的自然数; 中间伸缩臂节的个数为两个以上; N-2 根内侧拉绳分别对应地连接 N-2根内侧超起撑杆的活动端和两个以上中间伸缩臂节中 相同的或不同的中间伸缩臂节的头部。 进一步地, 起重机超起装置包括如下拉绳及拉点布置方式: 伸缩臂起重机的起重 臂还包括副臂, 副臂与主臂臂头相对固定地连接; 伸缩臂包括至少两节伸缩臂节, 至 少两节伸缩臂包括顶端连接主臂臂头的顶部伸缩臂节和位于顶部伸缩臂节和基本臂之 间的至少一个中间伸缩臂节; 超起撑杆组包括位于最外侧的第一外侧超起撑杆和第二 外侧超起撑杆及位于第一外侧超起撑杆和第二外侧超起撑杆之间的 N-2根内侧超起撑 杆; 第一拉紧装置包括拉绳组, 拉绳组包括与 N根超起撑杆一一对应的 N根拉绳, N 根拉绳包括第一外侧拉绳和第二外侧拉绳及位于第一外侧拉绳和第二外侧拉绳之间的 N-2 根内侧拉绳; 第一外侧拉绳和第二外侧拉绳对应地连接第一外侧超起撑杆和第二 外侧超起撑杆的活动端和副臂, N-2根内侧拉绳对应地连接 N-2根内侧超起撑杆的活 动端与主臂臂头或至少一个中间伸缩臂节的头部。 进一步地, 副臂包括连接于副臂臂节上的辅助延长段撑杆, 第一外侧拉绳和第二 外侧拉绳对应地连接第一外侧超起撑杆和第二外侧超起撑杆的活动端和辅助延长段撑 杆。 进一步地, 起重机超起装置包括如下拉绳及拉点布置方式: 转台还包括辅助撑杆 组, 辅助撑杆组包括至少一根辅助撑杆, 至少一根辅助撑杆的第一端与转台连接; 第 二拉紧装置包括与 N根超起撑杆一一对应的 N个拉紧单元;至少部分拉紧单元连接相 应的超起撑杆的活动端和辅助撑杆与第一端相对的第二端。 进一步地, 起重机超起装置包括如下拉绳及拉点布置方式: 起重臂还包括固定延 长部件, 固定延长部件固定于主臂臂头顶端, 包括第一侧向固定部组和第二侧向固定 部组, 每个侧向固定部组包括沿固定沿长部件外周分布的 N个侧向固定部; 起重机超 起装置包括臂头撑杆组, 臂头撑杆组包括 N根臂头撑杆, N根臂头撑杆的内端部与第 一侧向固定部组或第二侧向固定部组中的 N个侧向固定部一一对应地连接; 第一拉紧 装置连接于 N根超起撑杆的活动端与 N根臂头撑杆的外端部之间。 进一步地, N根臂头撑杆的内端部与第一侧向固定部组中的 N个侧向固定部一一 对应地连接, N根超起撑杆与 N根臂头撑杆对齐地设置; 第一拉紧装置包括拉绳组, 拉绳组包括与 N根超起撑杆一一对应的 N根拉绳, N根拉绳中的每一根拉绳连接于相 对齐的超起撑杆的活动端与臂头撑杆的外端部之间。 进一步地, N根臂头撑杆的内端部与第二侧向固定部组中的 N个侧向固定部一一 对应地连接, N根超起撑杆与 N根臂头撑杆交叉地设置; 第一拉紧装置包括拉绳组, 拉绳组包括 2χΝ根拉绳,在 N根超起撑杆中的每一根超起撑杆的活动端连接两根拉绳, 且两根拉绳分别与该超起撑杆相邻的两根臂头撑杆的外端部连接。 本发明还提供了一种伸缩臂起重机, 包括转台、 起重臂和与起重臂相连的起重机 超起装置, 起重臂包括主臂和设置于主臂上端的主臂臂头, 主臂包括与转台相枢接的 基本臂和相对于基本臂可伸出或缩回的伸缩臂, 其中起重臂超起装置为前述的起重臂 超起装置。 本发明的起重机超起装置和具有该起重机超起装置的伸缩臂起重机根据其拉绳及 拉点布置方式的变化, 既可实现传统起重机的超远吊载模式, 又可实现传统起重机所 不具备的超高吊载模式, 使主臂可采用接近或达到 90°的仰角, 很大程度上拓展了伸 缩臂起重机的起重性能。 附图说明 说明书附图用来提供对本发明的进一步理解, 构成本发明的一部分, 本发明的示 意性实施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图中: 图 1为现有技术中起重机超起装置的立体结构示意图; 图 2为本发明实施例的具有超起装置的伸缩臂起重机在超远吊载模式下第二拉紧 装置连接于基本臂尾部并采用第一种拉绳及拉点布置方式的结构示意图; 图 3为本发明实施例的具有超起装置的伸缩臂起重机在超远吊载模式下第二拉紧 装置连接于转台后部并采用第一种拉绳及拉点布置方式的结构示意图; 图 4为本发明实施例的具有超起装置的伸缩臂起重机在超远吊载模式下第二拉紧 装置连接于转台后部并采用第二种拉绳及拉点布置方式的结构示意图; 图 5为本发明实施例的具有超起装置的伸缩臂起重机在超远吊载模式下第二拉紧 装置连接于转台后部并采用第三种拉绳及拉点布置方式的结构示意图; 图 6为本发明实施例的具有超起装置的伸缩臂起重机在超远吊载模式下第二拉紧 装置连接于转台后部并采用第四种拉绳及拉点布置方式的结构示意图; 图 7为本发明实施例的具有超起装置的伸缩臂起重机在超远吊载模式下第二拉紧 装置连接于转台后部并采用第五种拉绳及拉点布置方式的结构示意图; 图 8为本发明实施例的具有超起装置的伸缩臂起重机在超高吊载模式下第二拉紧 装置连接于转台后部及辅助撑杆组并采用第六种拉绳及拉点布置方式的结构示意图; 以及 图 9为本发明实施例的具有超起装置的伸缩臂起重机在超高吊载模式下第二拉紧 装置连接于转台后部及辅助撑杆组并采用第七种拉绳及拉点布置方式的结构示意图。 具体实施方式 下面将结合本发明实施例中的附图, 对本发明的实施例中的技术方案进行详细的 说明, 但如下实施例以及附图仅是用以理解本发明, 而不能限制本发明, 本发明可以 由权利要求限定和覆盖的多种不同方式实施。 本发明的起重机超起装置, 用于伸缩臂起重机, 伸缩臂起重机包括下车 110、 转 台 120和起重臂, 起重臂包括主臂 140和设置于主臂 140上端的主臂臂头 170, 主臂 140包括与转台 120相枢接的基本臂 141和相对基本臂 141可伸出或缩回的伸缩臂 142。 起重机超起装置包括超起撑杆组、 第一拉紧装置和第二拉紧装置。 超起撑杆组包括 N 根超起撑杆。 其中 N为大于或等于 3的自然数, 例如, 可以是 5、 6、 7、 8根等等, 当然, 受限于超起撑杆的安装位置和控制的复杂程度, 超起撑杆组中超起撑杆的数量 以 3根以上 8根以下为好。 超起撑杆组中每根超起撑杆具有连接端和活动端, 连接端 与伸缩臂起重机的基本臂 141枢接。 第一拉紧装置连接于每根超起撑杆的活动端和位 于伸缩臂以上的起重臂之间。 第二拉紧装置连接于每根超起撑杆的活动端与转台 120 或基本臂 141的尾部之间。 该起重机超起装置可以在超远吊载模式和超高吊载模式下 运行。 本发明的技术特征"伸缩臂以上"包括伸缩臂本身。 该起重机超起装置和具有该起重机超起装置的伸缩臂起重机根据其拉绳及拉点布 置方式的变化, 既可实现传统起重机的超远吊载模式, 又可实现传统起重机所不具备 的超高吊载模式,在本发明中所说的超高吊载模式是指可以使主臂采用接近或达到 90° 的仰角进行吊载。 超高吊载模式的采用很大程度上拓展了伸缩臂起重机的起重性能。 其中优选地, 在超远吊载模式下, 以起重臂为界, N根超起撑杆均处于与基本臂
141 的倾斜侧相反的一侧。 这样的设置可以使所有的超起撑杆均对主臂施加一与主臂 倾斜方向相反的分力, 从而充分利用超起撑杆组的性能。 其中优选地, 在超高吊载模式下, N根超起撑杆分布在基本臂 141的四周。 更优 选地, N根超起撑杆均匀地分布在基本臂 141的四周。 这样的设置可以使起重机的主 臂在接近或达到 90°的仰角时能稳定工作。 以下仅以包括四根超起撑杆的超起撑杆组 150为例对本发明的起重机超起装置和 伸缩臂起重机进行说明。该起重机是指四杆超起可竖立式起重机(即可超高吊载), 其 工作模式主要有传统超远吊载模式, 又有独特的和超高吊载模式两种, 在这两种工作 模式下,四根超起撑杆分别具有不同的张开方式:例如超远吊载时可以有" V"型、倒"个" 型或双 "V"型张开方式,本实施例在超远吊载模式下各拉绳及拉点布置方式均以倒"个" 型为例进行说明; 超高吊载时则优选为四根撑杆沿基本臂 141周向均布的方式。 如图 2至图 9所示,超起撑杆组 150由位于同一转动平面内的四根超起撑杆组成, 四根超起撑杆分别为第一内侧超起撑杆 151、第二内侧超起撑杆 152、第二外侧超起撑 杆 153和第一外侧超起撑杆 154。 第一内侧超起撑杆 151可相对于基本臂 141在转动平面内从与起重臂的变幅平面 成 0°的位置旋转至与起重臂的变幅平面成 45°的位置。 驱动第一内侧超起撑杆 151的 旋转驱动装置可以为安装在第一内侧超起撑杆 151和基本臂 141之间的第一油缸。 起 重臂相对于基本臂根部转动进行变幅作业时起重臂所在的平面即为起重臂的变幅平 面。 第一外侧超起撑杆 154可相对于第一内侧超起撑杆 151在转动平面内从与第一内 侧超起撑杆 151成 0°的位置旋转至与第一内侧超起撑杆 151成 90°的位置。 驱动第一 外侧超起撑杆 154的旋转驱动装置可以为安装在第一内侧超起撑杆 151和第一外侧超 起撑杆 154之间的第四油缸。 第二内侧超起撑杆 152可相对于基本臂 141在转动平面内从与起重臂的变幅平面 成 0°的位置旋转至与起重臂的变幅平面成 45°的位置。 驱动第二内侧超起撑杆 152的 旋转驱动装置可以为安装在第二内侧超起撑杆 152和基本臂 141之间的第二油缸。 第二外侧超起撑杆 153可相对于第二内侧超起撑杆 152在转动平面内从与第二内 侧超起撑杆 152成 0°的位置旋转至与第二内侧超起撑杆 152成 90°的位置。 驱动第二 外侧超起撑杆 153的旋转驱动装置可以为安装在第二内侧超起撑杆 152和第二外侧超 起撑杆 153之间的第三油缸。 以上由位于同一转动平面内的四根超起撑杆组成超起撑杆组 150的设置, 保证了 第一内侧超起撑杆 151和第二内侧超起撑杆 152之间的夹角至少在 0°至 90°的范围内 连续可调, 也可以使超起装置实现四根超起撑杆的两两相邻的撑杆之间夹角均为 90°, 从而为伸缩臂起重机在超远吊载模式下调节各超起撑杆的张开方式, 以及在超高吊载 模式下实现臂架系统的稳定提供了基础。 图 2为本发明实施例的具有超起装置的伸缩臂起重机在超远吊载模式下第二拉紧 装置连接于基本臂尾部并采用第一种拉绳及拉点布置方式的结构示意图。 图 3为本发 明实施例的具有超起装置的伸缩臂起重机在超远吊载模式下第二拉紧装置连接于转台 后部并采用第一种拉绳及拉点布置方式的结构示意图。 在以下将描述的各种拉绳及拉 点布置方式中,第二拉紧装置即可以连接于基本臂 141尾部也可以连接于转台 120上, 其中第二拉紧装置包括四个与四根超起撑杆一一对应的拉紧单元, 该拉紧单元可以是 拉绳或拉板。 在一个未示出的实施例中, 也可以是一部分拉紧单元连接于转台上而另 一部分连接于基本臂尾部。 在以下的描述中, 仅以第二拉紧装置为拉板组 130且拉板 组 130内的每根拉板均连接于伸缩臂起重机的转台 (其中, 在图 8和图 9所示的拉绳 及拉点布置方式中, 部分拉板借助于辅助撑杆连接于缩伸缩臂起重机的转台) 为例进 行说明。 如图 3所示, 伸缩臂 142包括了五节伸缩臂节, 分为顶端连接主臂臂头 170的顶 部伸缩臂节 142E和位于顶部伸缩臂节 142E和基本臂 141之间的第一至第四中间伸缩 臂节 142A、 142B、 142C和 142D。 在本实施例的起重机的超远吊载模式下, 第一种拉绳及拉点布置方式如下: 第二拉紧装置包括拉板组 130, 拉板组 130包括与四根超起撑杆一一对应的四根 拉板, 四根拉板分别为第一外侧拉板 134、第二外侧拉板 133及位于第一外侧拉板 134 和第二外侧拉板 133之间的两根内侧拉板, 即第一内侧拉板 131和第二内侧拉板 132。 四根拉板中的每一根拉板对应地连接于四根超起撑杆的活动端与转台 120 的后部之 间。 第一拉紧装置包括拉绳组 160, 拉绳组 160包括与四根超起撑杆一一对应的四根 拉绳, 四根拉绳包括第一外侧拉绳 164和第二外侧拉绳 163及位于第一外侧拉绳 164 和第二外侧拉绳 163之间的两根内侧拉绳, 即第一内侧拉绳 161和第二内侧拉绳 162。 优选地, 拉绳为钢丝绳。 第一种拉绳及拉点布置方式中四根拉绳均对应地连接在四根 超起撑杆的活动端和主臂臂头 170之间。 在以上第一种拉绳及拉点布置方式下, 基本臂 141尾部的受力状况得到改善, 并 且拉点位置与主臂下铰点之间的距离增大, 在相同吊载载荷下, 可以提高臂架系统的 刚度。 图 4为本发明实施例的具有超起装置的伸缩臂起重机在超远吊载模式下第二拉紧 装置连接于转台后部并采用第二种拉绳及拉点布置方式的结构示意图。 如图 4所示, 第二种拉绳及拉点布置方式与第一种拉绳及拉点布置方式的不同之处在于, 第一外侧 拉绳 164和第二外侧拉绳 163分别对应地连接第一外侧超起撑杆 154和第二外侧超起 撑杆 153的活动端和主臂臂头 170, 两根内侧拉绳 161和 162对应地连接两根内侧超 起撑杆 151和 152的活动端与第二中间伸缩臂节 142B的头部。 当然, 两根内侧拉绳 161和 162也可以对应地连接两根内侧超起撑杆 151和 152的活动端与第一中间伸缩 臂节 142A、 第三中间伸缩臂节 142C或第四中间伸缩臂节 142D的头部。 在第二种拉 绳及拉点布置方式中第二拉紧装置的连接方式与第一种拉绳及拉点布置方式相同。 伸缩臂起重机在吊载时, 基本臂 141所受到的弯矩较大, 应力状况很差, 越靠近 主臂臂头 170部位的伸缩臂节, 其受到的弯矩也越小, 应力状况相对而言也越好, 第 二种拉绳及拉点布置方式中可以有效提高中后段伸缩臂节的刚度, 使其应力状况大为 改善。 与第一种拉绳及拉点布置方式相比, 第二种拉绳及拉点布置方式的起重机超起 装置可以提供更大的拉力, 主臂中后段的受力状况更为良好, 而对于中前段伸缩臂节 而言, 其本身的受力状况较中后段伸缩臂节为好, 因此第二种拉绳及拉点布置方式使 主臂的受力状况在整体上来说更为均衡, 可以进一步提高伸缩臂起重机的起重性能。 图 5为本发明实施例的具有超起装置的伸缩臂起重机在超远吊载模式下第二拉紧 装置连接于转台后部并采用第三种拉绳及拉点布置方式的结构示意图。 如图 5所示, 第三种拉绳及拉点布置方式与第二种拉绳及拉点布置方式的不同之处在于, 第一内侧 拉绳 161连接在了第一内侧超起撑杆 151的活动端和第一中间伸缩臂节 142A之间, 而第二内侧拉绳 162 连接在了第二内侧超起撑杆 152 的活动端和第三中间伸缩臂节 142C之间。 即不同的内侧拉绳可以与不同的中间伸缩臂节的头部连接。在第三种拉绳 及拉点布置方式中第一拉紧装置的其它拉绳的连接方式和第二拉紧装置的连接方式均 与第二种拉绳及拉点布置方式相同。 图 5所示的第三种拉绳及拉点布置方式与图 4所示的第二种拉绳及拉点布置方式 的拉点布置的原理相似。 在第三种拉绳及拉点布置方式中, 主臂被拉绳分成几段, 每 一段主臂内部均有不同的应力分布, 两个内侧拉绳可以提供不同的拉紧力, 相对于图 4 所示的第二种拉绳及拉点布置方式, 第三种拉绳及拉点布置方式可以使主臂各段的 应力分布更加均匀, 可以更大的提高起重机的起重性能。 以上第一至第三种拉绳及拉点布置方式, 第一拉紧装置的拉点均分布在主臂上, 而事实上, 在超远吊载工况下, 限制起重机起重性能的一个重要因素是副臂的失稳破 坏, 因此也可将拉点布置在副臂上。 图 6为本发明实施例的具有超起装置的伸缩臂起重机在超远吊载模式下第二拉紧 装置连接于转台后部并采用第四种拉绳及拉点布置方式的结构示意图。 第四种拉绳及 拉点布置方式主要针对超远吊载且使用固定副臂的工况。 如图 6所示, 伸缩臂起重机 的起重臂还包括与主臂臂头 170相对固定连接的副臂。第四种拉绳及拉点布置方式下, 第一外侧拉绳 164和第二外侧拉绳 163对应地连接第一外侧超起撑杆 154和第二外侧 超起撑杆 153的活动端和副臂, 优选地是第一外侧拉绳 164和第二外侧拉绳 163连接 至副臂中段。 而两根内侧拉绳 161和 162对应地连接两根内侧超起撑杆 151和 152的 活动端与主臂臂头 170。 另外, 还可以在副臂上安装有辅助延长段撑杆, 使该辅助延 长段撑杆与相应的拉绳连接。 在第四种拉绳及拉点布置方式中第二拉紧装置的连接方 式与第一种拉绳及拉点布置方式相同。 第四种拉绳及拉点布置方式可以有效提高副臂后段的刚度与稳定性, 同时两根内 侧拉绳 161和 162可以兼顾主臂的刚度, 对于超远吊载十分有利, 可以大幅提高超远 吊载时起重机的起重能力。 图 7为本发明实施例的具有超起装置的伸缩臂起重机在超远吊载模式下第二拉紧 装置连接于转台后部并采用第五种拉绳及拉点布置方式的结构示意图。 图 7所示的第 五种拉绳及拉点布置方式可以代替图 6所示的第四种拉绳及拉点布置方式用于固定副 臂的工况。第五种拉绳及拉点布置方式与第四种拉绳及拉点布置方式的不同之处在于, 第一内侧拉绳 161连接于第一内侧超起撑杆 151的端部和第二伸缩臂节 142B的头部 之间, 而第二内侧拉绳 162连接第二内侧超起撑杆 152的活动端与主臂臂头 170。 当 然,在一些未图示的实施例中, 两根内侧拉绳 161和 162也可以对应地连接两根内侧 超起撑杆 151和 152的活动端与主臂臂头 170或中间伸缩臂节 142A、 142B、 142C和 142D中任一个的头部。第五种拉绳及拉点布置方式与第四种拉绳及拉点布置方式的其 它部分相同, 不再重得描述。 第五种拉绳及拉点布置方式与第四种拉绳及拉点布置方式相比可以进一步增强臂 架系统的抗扭转稳定性。 图 8为本发明实施例的具有超起装置的伸缩臂起重机在超高吊载模式下第二拉紧 装置连接于转台后部及辅助撑杆组并采用第六种拉绳及拉点布置方式的结构示意图。 如图 8所示, 起重机在超高吊载模式下, 主臂仰角接近或达到 90°, 此时优选地 起重机超起装置还包括辅助撑杆组 121, 辅助撑杆组 121包括两根设置在转台前部的 辅助撑杆,其中每根辅助撑杆的第一端与转台 120连接。拉板组 130的四个根拉板中, 第一内侧拉板 131连接在第一内侧超起撑杆 151的活动端和转台 120后部, 第二内侧 拉板 132连接第二内侧超起撑杆 152的活动端和转台 120后部。 优选地, 第一内侧拉 板 151和第二内侧拉板 152与特制配重砝码的后部两侧及相应的超起撑杆的活动端相 连。 而两根外侧拉板 133和 134分别对应地连接在两根外侧超起撑杆 163和 164与两 根辅助撑杆的第二端。 另外, 起重机的起重臂还包括固定延长部件 190, 固定延长部件 190固定于主臂 臂头 170顶端, 并包括第一侧向固定部组和第二侧向固定部组, 每个侧向固定部组包 括沿固定延长部件 190外周分布的四个侧向固定部。 起重机超起装置还包括臂头撑杆 组 180, 臂头撑杆组 180包括四根臂头撑杆即第一至第四臂头撑杆 181、 182、 183和 184。臂头撑杆组与第一侧向固定部组还是第一侧向固定部组连接, 决定了臂头撑杆组 的各臂头撑杆的空间位置。 在本实施例中具体地, 围绕固定沿长部件 190外周均匀分 布了八个侧向固定部, 其中, 第一侧向固定部组的每个侧向固定部位于第二侧向固定 部组的两个相邻的侧向固定部之间。 在第六种拉绳及拉点布置方式中, 四根臂头撑杆 181、 182、 183和 184的内端部 与第一侧向固定部组的四个侧向固定部一一对应地连接, 此时, 四根超起撑杆与四根 臂头撑杆基本对齐地设置; 第一拉紧装置包括拉绳组 160, 拉绳组 160包括与四根超 起撑杆——对应的四根拉绳 161、 162、 163和 164, 四根拉绳 161、 162、 163和 164 中的每一根拉绳连接于相互对齐的超起撑杆的活动端与臂头撑杆的外端部之间。 第六种拉绳及拉点布置方式可以有效提高臂架系统在接近或达到 90°仰角工况下 的刚度和稳定性, 为该起重机在 90°仰角工况下工作提供根本的基础, 而传统的起重 机则无法在 90°仰角工况下工作。 第六种拉绳及拉点布置方式的控制相对简单, 且可 以极大提高超高吊载时臂架系统的刚度和稳定性; 图 9为本发明实施例的具有超起装置的伸缩臂起重机在超高吊载模式下第二拉紧 装置连接于转台后部及辅助撑杆组并采用第七种的结构示意图。 第七种拉绳及拉点布 置方式与图 8所示的第六种接绳连拉方式的区别在于四根臂头撑杆 181、 182、 183和 184 的内端部与第二侧向固定部组的四个侧向固定部一一对应地连接, 此时, 四根超 起撑杆与四根臂头撑杆交叉地设置。 优选地, 各臂头撑杆与超起撑杆之间成 45°交错 式布置。 而第一拉紧装置包括拉绳组 160, 拉绳组 160包括了八根拉绳, 在四根超起 撑杆中的每一根超起撑杆的活动端连接两根拉绳, 且两根拉绳分别与该超起撑杆相邻 的两根臂头撑杆的外端部连接。 具体地如图 9所示,拉绳 161A和拉绳 161B的一端均与第一内侧超起撑杆 151的 活动端连接, 而拉绳 161 A的另一端连接至第一臂头撑杆 181, 拉绳 161B的另一端连 接至第二臂头撑杆 182; 拉绳 162A和拉绳 162B的一端均与第二内侧超起撑杆 152的 活动端连接, 而拉绳 162A的另一端连接至第二臂头撑杆 182, 拉绳 162B的另一端连 接至第三臂头撑杆 183; 拉绳 163A和拉绳 163B的一端均与第二外侧超起撑杆 153的 活动端连接, 而拉绳 163A的另一端连接至第三臂头撑杆 183, 拉绳 163B的另一端连 接至第四臂头撑杆 184; 拉绳 164A和拉绳 164B的一端均与第一外侧超起撑杆 154的 活动端连接, 而拉绳 164A的另一端连接至第四臂头撑杆 184, 拉绳 164B的另一端连 接至第一臂头撑杆 181。 第七拉绳及拉点布置方式的第二拉紧装置的布置与第六拉绳 及拉点布置方式相同, 不再具体描述。 第七种拉绳及拉点布置方式与第六种拉绳及拉点布置方式相比, 虽然控制及结构 均较复杂, 但是该布置方式除了可以有效提高臂架系统 90°仰角吊载时的刚度外, 还 可最大程度的提升臂架系统的抗扭转稳定性, 使其超高吊载时, 转台转动过程中臂架 系统更加稳定。 起重机由不同幅度及臂长所组合而成的工况有几十甚至上百种, 而现有超起装置 及其拉绳及拉点布置方式十分单一, 并不能使起重机的性能在每种工况下都达到较好 的优化。 本实施例所提供的超起装置的拉绳及拉点布置方式十分灵活, 并且基本每一 种拉绳及拉点布置方式均对应不同的工况, 因此可以将起重机的上百种工况划分为不 同的区域, 通过优化理论及优化计算, 对每个区域采用不同的拉绳及拉点布置方式, 以便使得起重机在各个起重区域的性能达到最优, 从而实现起重机整体起重性能的全 面优化提升。 需要说明的是, 图 6和图 7两种拉绳及拉点布置方式中可以在副臂上方设置辅助 延长段撑杆, 但是, 在图 2至图 5所示的各种拉绳及拉点布置方式中, 也可以在主臂 臂头相应的部位设置辅助延长段撑杆, 并通过辅助延长段撑杆连接相应的拉绳和主臂 臂头, 辅助延长段撑杆的设置可以进一步增强臂架系统的抗扭转稳定性。 另外, 以上 均以各种拉绳及拉点布置方式中均以单绳拉紧为例对第一拉紧装置进行说明, 但是, 也可以通过在第一拉紧装置的前拉点设置定滑轮, 从而采用双排绳拉紧的方式进行拉 紧等。 根据以上描述可知, 本发明的以上实施例实现了以下技术效果: 该起重机超起装置和具有该起重机超起装置的伸缩臂起重机根据其拉绳及拉点布 置方式的变化, 即可实现传统起重机的超远吊载模式, 又可实现传统起重机所不具备 的超高吊载模式, 使主臂可采用接近或达到 90°的仰角。 该起重机超起装置的第一拉紧装置的前拉点可以布置在同一位置, 也可以各自分 开布置; 既可以布置在主臂上, 也可以布置在副臂上, 针对各方式的优缺点, 可适用 于不同的起重工况, 从而使具有该超起装置的伸缩臂起重机的整体起重性能得到全面 提升。 超高吊载时第一拉紧装置可以在超起撑杆和臂头撑杆间一一对应布置, 也可以采 用一根超起撑杆对于两个臂头撑杆的一对二布置。 前者控制简单, 且可以极大提高超 高吊载时臂架系统的刚度和稳定性; 后者控制及结构均较复杂, 但是该布置方式除了 可以有效提高臂架系统 90°仰角吊载时的刚度外, 还可最大程度的提升臂架系统的抗 扭转稳定性, 使其超高吊载时, 转台转动过程中臂架系统更加稳定。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技 术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内, 所作的 任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1. 一种起重机超起装置, 用于伸缩臂起重机, 所述伸缩臂起重机包括转台 (120) 和起重臂, 所述起重臂包括主臂 (140) 和设置于所述主臂 (140) 上端的主臂 臂头 (170), 所述主臂 (140) 包括与所述转台 (120) 相枢接的基本臂 (141 ) 和相对所述基本臂 (141 ) 可伸出或缩回的伸缩臂 (142), 其特征在于,
所述起重机超起装置包括:
超起撑杆组 (150), 所述超起撑杆组 (150) 包括 N根超起撑杆, 其中 N 为大于或等于 3的自然数, 每根所述超起撑杆具有连接端和活动端, 所述连接 端与所述伸缩臂起重机的基本臂 (141 ) 枢接;
第一拉紧装置, 连接于每根所述超起撑杆的活动端和位于所述伸缩臂以上 的起重臂之间;
第二拉紧装置, 连接于每根所述超起撑杆的活动端与所述转台(120)或所 述基本臂 (141 ) 的尾部之间; 并且, 所述起重机超起装置包括超远吊载模式和超高吊载模式。
2. 根据权利要求 1所述的起重机超起装置,其特征在于,在所述超远吊载模式下, 以起重臂为界, 所述 N根超起撑杆均处于与所述基本臂 (141 ) 的倾斜侧相反
3. 根据权利要求 1所述的起重机超起装置,其特征在于,在所述超高吊载模式下, 所述 N根超起撑杆分布在所述基本臂 (141 ) 的四周。
4. 根据权利要求 2或 3所述的起重机超起装置, 其特征在于, 所述 N根超起撑杆 为位于同一转动平面内的四根超起撑杆, 所述四根超起撑杆包括:
第一内侧超起撑杆(151 ), 可相对于所述基本臂(141 )在所述转动平面内 从与所述起重臂的变幅平面成 0°的位置旋转至与所述起重臂的变幅平面成 45° 的位置;
第一外侧超起撑杆(154), 可相对于所述第一内侧超起撑杆(151 )在所述 转动平面内从与所述第一内侧超起撑杆 (151 ) 成 0°的位置旋转至与所述第一 内侧超起撑杆 (151 ) 成 90°的位置; 第二内侧超起撑杆(152), 可相对于所述基本臂(141 )在所述转动平面内 从与所述起重臂的变幅平面成 0°的位置旋转至与所述起重臂的变幅平面成 45° 的位置;
第二外侧超起撑杆(153 ), 可相对于所述第二内侧超起撑杆(152)在所述 转动平面内从与所述第二内侧超起撑杆 (152) 成 0°的位置旋转至与所述第二 内侧超起撑杆 (152) 成 90°的位置。
5. 根据权利要求 2所述的起重机超起装置, 其特征在于, 所述起重机超起装置包 括如下拉绳及拉点布置方式: 所述第一拉紧装置包括拉绳组 (160), 所述拉绳 组 (160)包括 N根拉绳, 所述 N根拉绳一一对应地连接在所述 N根超起撑杆 的活动端和所述主臂臂头 (170) 之间。
6. 根据权利要求 2所述的起重机超起装置, 其特征在于, 所述起重机超起装置包 括如下拉绳及拉点布置方式:
所述伸缩臂(142)包括至少两节伸缩臂节, 所述至少两节伸缩臂包括顶端 连接所述主臂臂头 (170) 的顶部伸缩臂节 (142E) 和位于所述顶部伸缩臂节 ( 142E) 和所述基本臂 ( 141 ) 之间的至少一个中间伸缩臂节 (142A、 142B、 142C、 142D);
所述超起撑杆组 (150) 包括位于最外侧的第一外侧超起撑杆 (154) 和第 二外侧超起撑杆 (153 ) 及位于所述第一外侧超起撑杆 (154) 和第二外侧超起 撑杆 (153 ) 之间的 N-2根内侧超起撑杆 (151、 152);
所述第一拉紧装置包括拉绳组 (160), 所述拉绳组 (160) 包括与所述 N 根超起撑杆一一对应的 N根拉绳, 所述 N根拉绳包括第一外侧拉绳 (164) 和 第二外侧拉绳 (163 ) 及位于所述第一外侧拉绳 (164) 和第二外侧拉绳 (163 ) 之间的 N-2根内侧拉绳 (161、 162);
所述第一外侧拉绳 (164) 和第二外侧拉绳 (163 ) 分别对应地连接所述第 一外侧超起撑杆 (154) 和第二外侧超起撑杆 (153 ) 的活动端和所述主臂臂头 ( 170), 所述 N-2根内侧拉绳 (161、 162) 分别对应地连接所述 N-2根内侧超 起撑杆(151、 152)的活动端与所述至少一个中间伸缩臂节(142A、 142B、 142C、 142D) 的头部。
7. 根据权利要求 6所述的起重机超起装置, 其特征在于,
N为大于或等于 4的自然数; 所述中间伸缩臂节 (142A、 142B、 142C、 142D) 的个数为两个以上; 所述 N-2根内侧拉绳分别对应地连接所述 N-2根内侧超起撑杆的活动端和 所述两个以上中间伸缩臂节中相同的或不同的中间伸缩臂节的头部。 根据权利要求 2所述的起重机超起装置, 其特征在于, 所述起重机超起装置包 括如下拉绳及拉点布置方式:
所述伸缩臂起重机的起重臂还包括副臂, 所述副臂与所述主臂臂头 (170) 相对固定地连接;
所述伸缩臂(142)包括至少两节伸缩臂节, 所述至少两节伸缩臂包括顶端 连接所述主臂臂头 (170) 的顶部伸缩臂节 (142E) 和位于所述顶部伸缩臂节 ( 142E) 和所述基本臂 ( 141 ) 之间的至少一个中间伸缩臂节 (142A、 142B、 142C、 142D);
所述超起撑杆组 (150) 包括位于最外侧的第一外侧超起撑杆 (154) 和第 二外侧超起撑杆 (153 ) 及位于所述第一外侧超起撑杆 (154) 和第二外侧超起 撑杆 (153 ) 之间的 N-2根内侧超起撑杆 (151、 152);
所述第一拉紧装置包括拉绳组 (160), 所述拉绳组 (160) 包括与所述 N 根超起撑杆一一对应的 N根拉绳, 所述 N根拉绳包括第一外侧拉绳 (164) 和 第二外侧拉绳 (163 ) 及位于所述第一外侧拉绳 (164) 和第二外侧拉绳 (163 ) 之间的 N-2根内侧拉绳 (161、 162);
所述第一外侧拉绳 (164) 和第二外侧拉绳 (163 ) 对应地连接所述第一外 侧超起撑杆(154)和第二外侧超起撑杆(153 )的活动端和所述副臂, 所述 N-2 根内侧拉绳 (161、 162) 对应地连接所述 N-2根内侧超起撑杆 (151、 152) 的 活动端与所述主臂臂头 (170) 或所述至少一个中间伸缩臂节 (142A、 142B、 142C、 142D) 的头部。 根据权利要求 8所述的起重机超起装置, 其特征在于, 所述副臂包括连接于副 臂臂节上的辅助延长段撑杆, 所述第一外侧拉绳(164)和第二外侧拉绳(163 ) 对应地连接所述第一外侧超起撑杆 (154) 和第二外侧超起撑杆 (153 ) 的活动 端和所述辅助延长段撑杆。 根据权利要求 3所述的起重机超起装置, 其特征在于, 所述起重机超起装置包 括如下拉绳及拉点布置方式: 所述转台还包括辅助撑杆组(121 ), 所述辅助撑杆组(121 )包括至少一根 辅助撑杆, 所述至少一根辅助撑杆的第一端与所述转台 (120) 连接;
所述第二拉紧装置包括与所述 N根超起撑杆一一对应的 N个拉紧单元; 至少部分所述拉紧单元连接相应的超起撑杆的活动端和所述辅助撑杆 ( 121 ) 与所述第一端相对的第二端。
11. 根据权利要求 3所述的起重机超起装置, 其特征在于, 所述起重机超起装置包 括如下拉绳及拉点布置方式:
所述起重臂还包括固定延长部件(190), 所述固定延长部件(190)固定于 所述主臂臂头(170)顶端, 包括第一侧向固定部组和第二侧向固定部组, 每个 侧向固定部组包括沿所述固定沿长部件 (190) 外周分布的 N个侧向固定部; 所述起重机超起装置包括臂头撑杆组(180), 所述臂头撑杆组(180)包括 N根臂头撑杆, 所述 N根臂头撑杆的内端部与第一侧向固定部组或第二侧向固 定部组中的 N个侧向固定部一一对应地连接;
所述第一拉紧装置连接于所述 N根超起撑杆的活动端与所述 N根臂头撑杆 的外端部之间。
12. 根据权利要求 11所述的起重机超起装置, 其特征在于,
所述 N根臂头撑杆的内端部与所述第一侧向固定部组中的 N个侧向固定部 一一对应地连接, 所述 N根超起撑杆与所述 N根臂头撑杆对齐地设置;
所述第一拉紧装置包括拉绳组 (160), 所述拉绳组 (160) 包括与所述 N 根超起撑杆一一对应的 N根拉绳,所述 N根拉绳中的每一根拉绳连接于相对齐 的超起撑杆的活动端与臂头撑杆的外端部之间。
13. 根据权利要求 11所述的起重机超起装置, 其特征在于,
所述 N根臂头撑杆的内端部与所述第二侧向固定部组中的 N个侧向固定部 一一对应地连接, 所述 N根超起撑杆与所述 N根臂头撑杆交叉地设置;
所述第一拉紧装置包括拉绳组 (160), 所述拉绳组 (160) 包括 2χΝ根拉 绳, 在所述 N根超起撑杆中的每一根超起撑杆的活动端连接两根拉绳, 且两根 拉绳分别与该超起撑杆相邻的两根臂头撑杆的外端部连接。 一种伸缩臂起重机, 包括转台 (120)、 起重臂和与所述起重臂相连的起重机超 起装置, 所述起重臂包括主臂 (140) 和设置于所述主臂 (140) 上端的主臂臂 头 (170), 所述主臂 (140)包括与所述转台 (120)相枢接的基本臂 (141 )和 相对于所述基本臂(141 )可伸出或缩回的伸缩臂(142), 其特征在于, 所述起 重臂超起装置为根据权利要求 1至 13中任一项所述的起重臂超起装置。
PCT/CN2012/081949 2012-05-17 2012-09-25 起重机超起装置及伸缩臂起重机 WO2013170567A1 (zh)

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