CN110092308B - Auxiliary arm of crane and crane - Google Patents
Auxiliary arm of crane and crane Download PDFInfo
- Publication number
- CN110092308B CN110092308B CN201910517019.6A CN201910517019A CN110092308B CN 110092308 B CN110092308 B CN 110092308B CN 201910517019 A CN201910517019 A CN 201910517019A CN 110092308 B CN110092308 B CN 110092308B
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- Prior art keywords
- arm head
- arm
- hook
- axle
- main chord
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- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 230000009286 beneficial effect Effects 0.000 description 9
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes 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
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/66—Outer or upper end constructions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
- B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
- B66D3/08—Arrangements of sheaves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D2700/00—Capstans, winches or hoists
- B66D2700/02—Hoists or accessories for hoists
- B66D2700/026—Pulleys, sheaves, pulley blocks or their mounting
- B66D2700/028—Pulley blocks with multiple sheaves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The application relates to engineering machine tool technical field especially relates to a auxiliary boom of hoist and hoist, includes: the auxiliary arm comprises an auxiliary arm body, an axle and an arm head pulley block, wherein the auxiliary arm body is provided with an arm head, the axle is arranged on the arm head, the arm head pulley block is arranged on the axle, and the auxiliary arm further comprises a supporting seat, and the supporting seat is fixed on the arm head so as to support the axle. The application provides a jib of hoist and hoist to solve at present in order to avoid wire rope to beat the technical problem that the pulley shaft and the arm head cooperation department stress concentration that lead to a certain extent.
Description
Technical Field
The application relates to the technical field of engineering machinery, in particular to a crane and a sub-arm of the crane.
Background
The crawler crane can adopt the design of a single-lifting hoisting mechanism or a double-lifting hoisting mechanism according to the space of the turntable. Since one hoisting mechanism is usually equipped with only one hoisting wire rope, a single hoisting wire rope is used for a single hoisting mechanism, and a double hoisting mechanism is configured with double hoisting wire ropes. When the crawler crane adopts the design of the double-lifting hoisting mechanism, two steel wire ropes can be used at the same time under the working condition of a long arm or an ultra-long arm, and only a single steel wire rope can be used under the working condition of a relatively short arm support.
As shown in fig. 7 and 8, conventionally, a crawler crane may employ a sub-arm head capable of achieving both a single rope function and a double rope function, and generally, in order to reduce weight, to improve boom rigidity, the arm head portion is narrow and the width is narrow compared to a hook block. Therefore, when in hoisting, two sections of steel wire ropes between the arm support and the lifting hook are splayed, and the phenomenon of turning of the steel wire ropes is easy to occur. Especially when the working condition of a long arm or an ultra-long arm and the lifting height are high, for example, the high tower drum of a wind driven generator is lifted, the lifting height can exceed 100 meters, the arm head of the arm frame is usually an auxiliary arm head, and the problem that a steel wire rope is easy to turn under the condition is solved. Solving such problems at the hoisting construction site often requires the assistance of a crawler crane manufacturer, and is time-consuming, labor-consuming and high in cost.
If the situation that the steel wire rope turns is avoided by simply widening the arm head, increasing the length of the pulley shaft and increasing the spacing between pulley blocks, the situation that the pulley shaft is subjected to larger bending moment and shearing force under the action of load due to longer length of the pulley shaft and stress concentration at the matching position of the pulley shaft and the arm head is caused, and the stress concentration must be reduced by reducing rated load. However, a decrease in rated load decreases the working capacity of the crawler crane, and the product competitiveness decreases.
Disclosure of Invention
The aim of the application is to provide a crane and auxiliary arm thereof, so as to solve the technical problem of stress concentration at the matching position of a pulley shaft and an arm head caused by the rotation of a steel wire rope to a certain extent.
In order to achieve the above purpose, the present application adopts the following technical scheme:
one aspect of the present application provides a crane jib comprising: the auxiliary arm comprises an auxiliary arm body, an axle and an arm head pulley block, wherein the auxiliary arm body is provided with an arm head, the axle is arranged on the arm head, and the arm head pulley block is arranged on the axle;
the wheel axle is characterized by further comprising a supporting seat, wherein the supporting seat is fixed on the arm head so as to support the wheel axle.
Preferably, the support seat is fitted with a middle portion of the wheel shaft in an axial direction of the wheel shaft.
The beneficial effect of this technical scheme lies in: the supporting seat can have a better sharing effect on acting forces acting on two ends of the wheel axle.
Preferably, the support base is welded to the arm head.
The beneficial effect of this technical scheme lies in: through welded connected mode, make the junction of supporting seat and arm head can obtain better stress distribution.
Preferably, the sub-arm body includes a first main chord pipe and a second main chord pipe disposed opposite to each other in an axial direction of the wheel shaft, the first main chord pipe and the second main chord pipe being parallel to each other at the arm head.
The beneficial effect of this technical scheme lies in: the first main string pipe and the second main string pipe are mutually parallel, and on the premise that the auxiliary arm has the standard length, the width of the arm head of the auxiliary arm is as close as possible or is the width of the wider part of the auxiliary arm, so that the lifting rope between the auxiliary arm and the lifting hook is close to the vertical direction or extends in the vertical direction and is far away as far as possible, and the problem that the lifting rope is easy to turn is avoided as far as possible.
Preferably, the hook block comprises a plurality of first hook pulleys for cooperation with said first hoisting ropes, and a plurality of second hook pulleys for cooperation with said second hoisting ropes,
the positions of the first lifting hook pulleys correspond to the positions of the first arm head pulleys, the positions of the second lifting hook pulleys correspond to the positions of the second arm head pulleys, the first lifting rope is sequentially matched with the first lifting hook pulleys in the first direction, the second lifting rope is sequentially matched with the second lifting hook pulleys in the second direction, the twisting direction of the steel wire rope adopted by the first lifting rope is right-handed, and the twisting direction of the steel wire rope adopted by the second lifting rope is left-handed.
The beneficial effect of this technical scheme lies in: through the mode of rope threading in opposite directions of the first lifting rope and the second lifting rope, the first lifting rope part is far away from each second lifting rope part as far as possible, and the twisting of the lifting ropes possibly occurring can be counteracted by combining the twisting directions of the selected lifting ropes, so that the first lifting rope and the second lifting ropes are prevented from being wound together.
Preferably, the auxiliary arm main body comprises a first main chord pipe and a second main chord pipe which are oppositely arranged in the axial direction of the wheel axle, and an included angle is formed between the first main chord pipe and the second main chord pipe at the arm head, and the included angle is smaller than 8 degrees.
The beneficial effect of this technical scheme lies in: through keeping certain angle between first main string pipe and the second main string pipe, reduced the length of shaft to a certain extent, and then can reduce the stress concentration between shaft and the arm head, and for the circumstances that makes the contained angle between first main string pipe and the second main string pipe more than or equal to 8 degrees, then can be under the prerequisite that guarantees that the auxiliary arm has sufficient length, make the width of arm head be close the width of the wider department of auxiliary arm as far as possible, and then make two sections lifting ropes between auxiliary arm and the lifting hook all be close vertical direction or extend and keep away from as far as possible in vertical direction, avoid the problem that lifting rope is easy to turn.
Preferably, the included angle is less than 7 degrees.
The beneficial effect of this technical scheme lies in: further, two sections of lifting ropes between the auxiliary arm and the lifting hook are close to the vertical direction or extend in the vertical direction.
Preferably, the included angle is 4 degrees.
The beneficial effect of this technical scheme lies in: this enables the positional relationship between the first main chord tube and the second main chord tube to be adapted to the sub-arms of various lengths.
Another aspect of the present application provides a crane comprising a jib of the crane described above.
Preferably comprising a first lifting rope, a second lifting rope and a hook block, the hook block and the arm head block being connected together by the first lifting rope and the second lifting rope,
the auxiliary arm main body comprises a first main chord pipe and a second main chord pipe which are oppositely arranged in the axial direction of the wheel axle,
the arm head pulley block comprises a plurality of first arm head pulleys matched with the first lifting rope and a plurality of second arm head pulleys matched with the second lifting rope,
each first arm head pulley is positioned on a part of the wheel shaft close to the first main chord tube, each second arm head pulley is positioned on a part of the wheel shaft close to the second main chord tube,
the first lifting rope is matched with each first arm head pulley in sequence in a first direction, the second lifting rope is matched with each second arm head pulley in sequence in a second direction,
the first direction is a direction from a second main chord tube to a first main chord tube in an axial direction of the axle, the second direction being opposite to the first direction.
The beneficial effect of this technical scheme lies in: when the lifting rope portion between the lifting hook and the auxiliary arm is driven to rotate, the lifting hook can effectively offset the trend through the position of each lifting rope portion, namely the arrangement mode, and further the lifting rope portions are prevented from being wound together.
The technical scheme that this application provided can reach following beneficial effect:
the utility model provides a crane's auxiliary arm and crane when avoiding wire rope to beat the problem of changeing through the mode that increases arm head width, increase shaft length and increase assembly pulley interval, has increased the contact point of shaft and auxiliary arm through addding the supporting seat, and then has shared the effort of shaft and arm head contact position through this supporting seat, and then has avoided the problem of stress concentration between shaft and the supporting seat at least to a certain extent.
Additional features and advantages of the present application will be set forth in the description which follows, or may be learned by the practice of the present application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are used in the description of the embodiments will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are of some embodiments of the present application and that other drawings may be derived from these drawings without the exercise of inventive effort.
FIG. 1 is a schematic top view of an embodiment of a crane jib according to the embodiments of the present application;
FIG. 2 is a schematic partial perspective view of an embodiment of a secondary arm of a crane according to an embodiment of the disclosure;
FIG. 3 is a schematic view of a partial perspective view of an embodiment of a secondary arm of a crane according to an embodiment of the disclosure;
figure 4 is a schematic view of a partial top view of one embodiment of a secondary arm of a crane according to an embodiment of the present application,
wherein alpha is an included angle between the first main chord tube and the second main chord tube;
fig. 5 is a schematic structural diagram of an embodiment of the arm head pulley block and the hook pulley block provided in the embodiment of the present application through the cooperation of a lifting rope;
fig. 6 is a schematic structural diagram of another embodiment of the arm head pulley block and the hook pulley block provided in the embodiment of the present application, which are matched by a lifting rope;
FIG. 7 is a schematic top view of one embodiment of a prior art crane jib;
fig. 8 is a schematic view of the engagement of a lift cord with a hook when using the auxiliary arm of a crane of the prior art.
Reference numerals:
100-a sub-arm body;
110-a first main chord tube;
120-a second main chord tube;
130-arm head;
200-arm head pulley block;
210-a first arm head pulley;
220-a second arm head pulley;
300-supporting seat;
400-a first lift cord;
500-a second lift cord;
600-lifting hook pulley block;
610-a first hook pulley;
620-a second hook pulley;
700-third lift cords.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
As shown in fig. 1-6, one aspect of the present application provides a crane jib comprising: the auxiliary arm body 100, the axle and the arm head pulley block 200,
the sub-arm body 100 has an arm head 130, an axle is mounted on the arm head 130, an arm head pulley block 200 is mounted on the axle,
also included is a support base 300, the support base 300 being secured to the arm head 130 to support the axle.
The auxiliary arm of the crane provided by the embodiment of the application is characterized in that when the problem of turning of the steel wire rope is avoided by increasing the width of the arm head 130, increasing the length of the wheel shaft and increasing the pulley block distance, the contact point between the wheel shaft and the auxiliary arm is increased by additionally arranging the supporting seat 300, the acting force of the contact position between the wheel shaft and the arm head 130 is further shared by the supporting seat 300, and the problem of stress concentration between the wheel shaft and the supporting seat 300 is further avoided to a certain extent at least. The support base 300 may preferably be an extension arm fixedly connected to the arm head 130, and a cylindrical structure through which the wheel axle passes may be formed on the extension arm, or an arc structure capable of supporting the wheel axle.
Preferably, the support base 300 is engaged with the middle portion of the wheel shaft in the axial direction of the wheel shaft. This allows the support base 300 to provide a better sharing of the forces acting on both ends of the axle.
Preferably, the support base 300 is welded to the arm head 130. By means of the welding connection mode, the connection position of the supporting seat 300 and the arm head 130 can obtain good stress distribution.
Preferably, the sub-arm body 100 includes a first main chord pipe 110 and a second main chord pipe 120 disposed opposite to each other in the axial direction of the wheel shaft, the first main chord pipe 110 and the second main chord pipe 120 being parallel to each other at the arm head 130. By making the first main string pipe 110 and the second main string pipe 120 parallel to each other, the width of the arm head 130 of the auxiliary arm is as close as possible or is the width of the wider part of the auxiliary arm on the premise that the auxiliary arm has a standard length, and then the lifting rope between the auxiliary arm and the lifting hook is close to the vertical direction or extends in the vertical direction and is far away as far as possible, so that the problem that the lifting rope is easy to turn is avoided as far as possible. The lifting rope can be a steel wire rope or a pull rope made of other materials.
As shown in fig. 5, the hook block 600 preferably includes a plurality of first hook pulleys 610 for engagement with the first lift cords 400, and a plurality of second hook pulleys 620 for engagement with the second lift cords 500,
the position of each first hook pulley 610 corresponds to the position of each first arm head pulley 210, the position of each second hook pulley 620 corresponds to the position of each second arm head pulley 220,
the first lifting rope 400 is sequentially engaged with each first lifting hook pulley 610 in a first direction, that is, the first lifting rope 400 is threaded in the first direction when seen from the cab to the boom, and the second lifting rope 500 is sequentially engaged with each second lifting hook pulley 620 in a second direction, that is, the second lifting rope 500 is threaded in the second direction when seen from the cab to the boom, wherein the twisting direction of the wire rope adopted by the first lifting rope 400 is right-handed and the twisting direction of the wire rope adopted by the second lifting rope 500 is left-handed.
By means of such threading of the first hoisting rope 400 and the second hoisting rope 500 in opposite directions, the first hoisting rope portion 400 is kept as far away from each second hoisting rope portion 500 as possible, and by combining the twisting directions of the selected hoisting ropes, possible twisting and turning of the hoisting ropes can be counteracted, so that the first hoisting rope 400 and the second hoisting rope 500 are prevented from being wound together. Of course, as long as the crane lifting function is achieved, the arrangement of the lifting rope portions when engaging the hook block 600 may also be other, for example, the first lifting rope 400 engages the first hook pulleys 610 at intervals in the first direction, i.e. every second first hook wheel between two first hook wheels engaging the first lifting rope 400 does not engage the first lifting rope 400.
Preferably, the auxiliary arm body 100 includes a first main chord tube 110 and a second main chord tube 120 disposed opposite to each other in an axial direction of the wheel axle, and an included angle is formed between the first main chord tube 110 and the second main chord tube 120 at the arm head 130, the included angle being less than 8 degrees. By keeping a certain angle between the first main string pipe 110 and the second main string pipe 120, the length of the axle is reduced to a certain extent, so that the stress concentration between the axle and the arm head 130 can be reduced, and compared with the situation that the included angle between the first main string pipe 110 and the second main string pipe 120 is greater than or equal to 8 degrees, the width of the arm head 130 is as close to the width of the wider part of the auxiliary arm as possible on the premise that the auxiliary arm has enough length, so that two sections of lifting ropes between the auxiliary arm and the lifting hook are close to the vertical direction or extend in the vertical direction and are far away as far as possible, and the problem that the lifting ropes are easy to turn is avoided as much as possible.
Preferably, the included angle is less than 7 degrees. Further, two sections of lifting ropes between the auxiliary arm and the lifting hook are close to the vertical direction or extend in the vertical direction.
Preferably, the included angle is 4 degrees. This enables the positional relationship between the first main chord tube 110 and the second main chord tube 120 to be adapted to sub-arms of various lengths. Of course, the included angle between the first main chord and the second main chord may be 2 degrees or 6 degrees or other angles smaller than 7 degrees, and when the included angle is smaller than 8 degrees, the included angle may be 7.2 degrees, 7.5 degrees or 7.8 degrees.
Another aspect of the present application provides a crane, including a crane jib as provided in the embodiments of the present application described above.
According to the crane provided by the embodiment of the application, when the problem of turning of the steel wire rope is avoided by increasing the width of the arm head 130, the length of the wheel shaft and the pulley block interval, the supporting seat 300 is additionally arranged, the contact point between the wheel shaft and the auxiliary arm is increased, the acting force of the contact position between the wheel shaft and the arm head 130 is further shared through the supporting seat 300, and the problem of stress concentration between the wheel shaft and the supporting seat 300 is further avoided to a certain extent.
Preferably, as shown in fig. 5, the crane provided in the embodiment of the present application includes a first lift rope 400, a second lift rope 500, and a hook block 600, the hook block 600 and the arm head block 200 are connected together by the first lift rope 400 and the second lift rope 500,
the sub-arm body 100 includes a first main chord tube 110 and a second main chord tube 120 disposed opposite in the axial direction of the wheel shaft,
the arm head pulley block 200 includes a plurality of first arm head pulleys 210 for engagement with the first lift cords 400, and a plurality of second arm head pulleys 220 for engagement with the second lift cords 500,
each first arm head pulley 210 is located on a portion of the axle near the first main chord tube 110, each second arm head pulley 220 is located on a portion of the axle near the second main chord tube 120,
the first lift cords 400 engage each of the first head pulleys 210 in turn in a first direction, the second lift cords 500 engage each of the second head pulleys 220 in turn in a second direction,
the first direction is a direction from the second main chord tube 120 to the first main chord tube 110 in the axial direction of the axle, the second direction being opposite to the first direction.
In the embodiment of the application, the plurality is at least two. Specifically, when the arm head pulley block 200 and the hook pulley block 600 are connected through the first lift rope 400 and the second lift rope 500, a plurality of sections of lift rope portions are formed between the arm head pulley block 200, if the first lift rope 400 is a first lift rope portion and the second lift rope 500 is a second lift rope portion, each first lift rope portion is mainly located at a side corresponding to the first main string pipe 110, each second lift rope portion is mainly located at a side corresponding to the second main string pipe 120, and each lift rope portion is distributed in an axial direction of the wheel shaft, which makes it possible to more effectively cancel the trend by the position or arrangement of each lift rope portion when a trend of driving the lift rope portion between the hook and the auxiliary arm occurs, thereby preventing the lift rope portions from being entangled together.
When there is only one lift cord, such as when there is only a third lift cord 700, the third lift cord 700 may engage the arm head 130 pulleys in sequence and the hook pulleys in sequence in only the first direction or the second direction, thereby achieving a single cord function, as shown in fig. 6.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Furthermore, those skilled in the art will appreciate that while some of the embodiments described above include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the present application and form different embodiments. For example, in the claims below, any of the claimed embodiments may be used in any combination. Furthermore, the information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (5)
1. Crane, characterized by including the auxiliary arm, the auxiliary arm includes: a sub-arm body (100), an axle and an arm head pulley block (200), the sub-arm body (100) having an arm head (130), the axle being mounted on the arm head (130), the arm head pulley block (200) being mounted on the axle;
the auxiliary arm further comprises a supporting seat (300), and the supporting seat (300) is fixed on the arm head (130) so as to support the wheel axle;
the crane also comprises a first lifting rope (400), a second lifting rope (500) and a lifting hook pulley block (600), wherein the lifting hook pulley block (600) and the arm head pulley block (200) are connected together through the first lifting rope (400) and the second lifting rope (500),
the auxiliary arm main body (100) comprises a first main chord tube (110) and a second main chord tube (120) which are oppositely arranged in the axial direction of the wheel shaft,
the arm head pulley block (200) comprises a plurality of first arm head pulleys (210) matched with the first lifting rope (400) and a plurality of second arm head pulleys (220) matched with the second lifting rope (500),
each of the first arm head pulleys (210) is located on a portion of the axle near the first main chord tube (110), each of the second arm head pulleys (220) is located on a portion of the axle near the second main chord tube (120),
the first lifting rope (400) is sequentially matched with each first arm head pulley (210) in a first direction, the second lifting rope (500) is sequentially matched with each second arm head pulley (220) in a second direction,
the first direction is a direction from a second main chord tube (120) to a first main chord tube (110) in an axial direction of the axle, the second direction being opposite to the first direction;
the supporting seat (300) is matched with the middle part of the wheel shaft in the axial direction of the wheel shaft;
the supporting seat (300) is welded with the arm head (130);
the hook block (600) comprises a plurality of first hook pulleys (610) for cooperation with the first hoisting ropes (400) and a plurality of second hook pulleys (620) for cooperation with the second hoisting ropes (500),
the position of each first hook pulley (610) corresponds to the position of each first arm head pulley (210), the position of each second hook pulley (620) corresponds to the position of each second arm head pulley (220),
the first lift cords (400) are engaged with each of the first hook pulleys (610) in sequence in a first direction, and the second lift cords (500) are engaged with each of the second hook pulleys (620) in sequence in a second direction.
2. Crane according to claim 1, characterized in that the first main chord pipe (110) and the second main chord pipe (120) are mutually parallel at the arm head (130).
3. Crane according to any of claims 1-2, characterized in that an angle is formed between the first main chord pipe (110) and the second main chord pipe (120) at the boom head (130), which angle is smaller than 8 degrees.
4. A crane according to claim 3, wherein the included angle is less than 7 degrees.
5. The crane of claim 4, wherein the included angle is 4 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910517019.6A CN110092308B (en) | 2019-06-14 | 2019-06-14 | Auxiliary arm of crane and crane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910517019.6A CN110092308B (en) | 2019-06-14 | 2019-06-14 | Auxiliary arm of crane and crane |
Publications (2)
| Publication Number | Publication Date |
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| CN110092308A CN110092308A (en) | 2019-08-06 |
| CN110092308B true CN110092308B (en) | 2024-03-29 |
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| CN201910517019.6A Active CN110092308B (en) | 2019-06-14 | 2019-06-14 | Auxiliary arm of crane and crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113929004B (en) * | 2021-10-09 | 2023-05-05 | 漳州杰盛钢结构工程有限公司 | Portable high-altitude movable scaffold and working method |
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| KR20160066226A (en) * | 2014-12-02 | 2016-06-10 | 씨에스기계 주식회사 | Wire connecting structure of crane |
| JP2016222392A (en) * | 2015-05-29 | 2016-12-28 | コベルコクレーン株式会社 | Mobile crane and boom standing method of mobile crane |
| CN108033368A (en) * | 2017-12-29 | 2018-05-15 | 浙江三装备有限公司 | A kind of gib arm of crane head assembly and crane |
| CN210001486U (en) * | 2019-06-14 | 2020-01-31 | 浙江三一装备有限公司 | Auxiliary arm of crane and crane |
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|---|---|
| CN110092308A (en) | 2019-08-06 |
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