CN110980555A - Telescopic arm of crane and crane - Google Patents
Telescopic arm of crane and crane Download PDFInfo
- Publication number
- CN110980555A CN110980555A CN201911390794.6A CN201911390794A CN110980555A CN 110980555 A CN110980555 A CN 110980555A CN 201911390794 A CN201911390794 A CN 201911390794A CN 110980555 A CN110980555 A CN 110980555A
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- CN
- China
- Prior art keywords
- arm
- telescopic
- telescopic arm
- crane
- cable
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
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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
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/703—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by flexible elements, e.g. cables, chains or bands
Abstract
The invention discloses a crane telescopic boom and a crane, and relates to the technical field of engineering machinery. The telescopic arm comprises a basic arm and a plurality of sections of telescopic arms nested in the basic arm, wherein a first telescopic arm is positioned at the tail end of the plurality of sections of telescopic arms far away from the basic arm, and the first telescopic arm, a second telescopic arm and a third telescopic arm are sequentially arranged; the arm head of the second telescopic arm is provided with a first rotating wheel, the arm tail of the second telescopic arm is provided with a second rotating wheel, and the first rotating wheel and the second rotating wheel are positioned at two opposite sides of the second telescopic arm; the first guy cable bypasses the first rotating wheel, and two ends of the first guy cable are respectively connected with the arm tail of the first telescopic arm and the arm tail of the third telescopic arm; the second cable bypasses the second rotating wheel, and the two ends of the second cable are respectively connected with the arm tail of the first telescopic arm and the arm head of the third telescopic arm. The problem that the arm pin assembly cannot be arranged due to the fact that the section size of the tail arm is small can be solved, and the applicability of the crane is facilitated to be improved.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a telescopic arm of a crane and the crane.
Background
With the development of economic construction and the improvement of manufacturing technology, the demand of construction sites on cranes is increasing day by day, and the telescopic boom is used as a core component of the crane and is the most important bearing structural member during the hoisting operation of the crane. The crane boom generally comprises a basic boom and a plurality of sections of telescopic booms sleeved in the basic boom in sequence, and the telescopic booms of the crane realize the extension and retraction of all levels of boom frames through a telescopic mechanism so as to complete the required hoisting operation.
In the prior art, a telescopic mechanism of a multi-section arm is mainly in a horizontal bar bolt form, the telescopic mechanism mainly comprises a telescopic cylinder, an arm pin assembly, a cylinder pin assembly and the like, and in order to ensure the safety and reliability of the telescopic arm in the telescopic process, the mechanism adopts a built-in interlocking system, namely after a spring driving cylinder pin arranged on a telescopic oil cylinder locks the telescopic arm, the connection between the section arm and other section arms is mechanically released. When the knuckle arm stretches in place, the cylinder pin is released after the knuckle arm is locked by the arm pin and connected with other knuckle arms, so that the next knuckle arm can be conveniently stretched.
However, for a crane with a multi-section arm, the section size of the tail section arm is often small, and an arm pin assembly cannot be arranged for mechanical locking, so that the development of the crane with the multi-section arm is limited.
Disclosure of Invention
The invention aims to provide a telescopic arm of a crane and the crane, which can solve the problem that an arm pin assembly cannot be arranged due to the small section size of a tail arm and are beneficial to improving the applicability of the crane.
The embodiment of the invention is realized by the following steps:
in one aspect of the embodiment of the invention, a telescopic boom of a crane is provided, which comprises a basic boom and a plurality of sections of telescopic booms nested in the basic boom, wherein a first telescopic boom is positioned at the tail end of the plurality of sections of telescopic booms far away from the basic boom, and the first telescopic boom, a second telescopic boom and a third telescopic boom are sequentially arranged; the arm head of the second telescopic arm is provided with a first rotating wheel, the arm tail of the second telescopic arm is provided with a second rotating wheel, and the first rotating wheel and the second rotating wheel are positioned on two opposite sides of the second telescopic arm; a first inhaul cable bypasses the first rotating wheel, and two ends of the first inhaul cable are respectively connected with the arm tail of the first telescopic arm and the arm tail of the third telescopic arm; a second inhaul cable bypasses the second rotating wheel, and two ends of the second inhaul cable are respectively connected with the arm tail of the first telescopic arm and the arm head of the third telescopic arm; and a fourth telescopic arm is further arranged between the third telescopic arm and the basic arm, arm pin assemblies are respectively arranged at the tail ends of other telescopic arms between the basic arm and the first telescopic arm, the arm pin assemblies are used for locking or unlocking the adjacent telescopic arms, a telescopic oil cylinder is arranged in the basic arm, and the telescopic oil cylinder can be respectively connected with the second telescopic arm, the third telescopic arm or the fourth telescopic arm through the cylinder pin assemblies.
Optionally, the telescopic cylinder comprises a cylinder body and a piston rod connected with the cylinder body, the piston rod is hinged with the arm tail of the basic arm, and the cylinder pin assembly is arranged at one end of the cylinder body close to the arm tail of the basic arm, so that the cylinder body is connected with any telescopic arm between the basic arm and the first telescopic arm.
Optionally, a first connecting seat is respectively arranged at a position where the arm tail of the first telescopic arm and the arm tail of the third telescopic arm are connected with the first cable; and the arm tail of the first telescopic arm and the arm head of the third telescopic arm are connected with the second inhaul cable, and second connecting seats are respectively arranged at the positions of the second inhaul cable.
Optionally, the opposite sides of the second telescopic arm are respectively provided with a via hole for passing through the first cable and the second cable.
Optionally, the fourth telescopic boom comprises at least two sections, the adjacent fourth telescopic booms are sequentially nested, and the fourth telescopic booms at two ends are respectively nested with the basic boom and the third telescopic boom.
Optionally, the first rotating wheel and the second rotating wheel are both fixed pulleys, and the first cable and the second cable are both steel wire ropes.
Optionally, the first rotating wheel and the second rotating wheel are both sprockets, and the first cable and the second cable are both chains.
Optionally, the first cable is located in an activity space between the first telescopic arm and the second telescopic arm, and the second cable is located in an activity space between the first telescopic arm and the second telescopic arm and between the second telescopic arm and the third telescopic arm.
In another aspect of the embodiments of the present invention, there is provided a crane, including the telescopic boom of the crane as described in any one of the above.
The embodiment of the invention has the beneficial effects that:
according to the telescopic arm of the crane and the crane, provided by the embodiment of the invention, the plurality of sections of telescopic arms are nested in the basic arm, wherein the first telescopic arm is positioned at the tail end of the plurality of sections of telescopic arms far away from the basic arm, and the first telescopic arm, the second telescopic arm and the third telescopic arm are sequentially arranged, so that the first telescopic arm, the second telescopic arm and the third telescopic arm can be gradually extended or retracted. When the telescopic oil cylinder drives the second telescopic arm to extend or retract, the first telescopic arm can synchronously extend or retract, after the preset position is reached, the second telescopic arm can be fixed by using the arm pin component, and the third telescopic arm and the fourth telescopic arm can extend according to actual requirements, and then secured using an arm pin assembly. According to the telescopic arm of the crane and the crane, provided by the embodiment of the invention, the arm pin component is not required to be arranged on the first telescopic arm, so that the telescopic efficiency is improved, the problem that the arm pin component cannot be arranged due to the small size of the section of the tail arm can be solved, and the applicability of the crane is favorably improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a telescopic boom of a crane according to an embodiment of the present invention;
fig. 2 is a second schematic structural view of a telescopic boom of a crane according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a telescopic cylinder according to an embodiment of the present invention.
Icon: 100-crane telescopic arm; 110-a base arm; 120-a first telescopic arm; 130-a second telescopic arm; 132-a first rotating wheel; 134-a second rotating wheel; 136-a via; 140-a third telescopic arm; 142-a first cable; 144-a second cable; 146-a first connection mount; 148-a second connection seat; 150-a fourth telescopic arm; 160-arm pin assembly; 170-telescopic oil cylinder; 172-cylinder body; 174-a piston rod; 180-cylinder pin assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 and fig. 2, the embodiment provides a telescopic boom 100 of a crane, including a basic boom 110, and a plurality of telescopic booms nested in the basic boom 110, wherein a first telescopic boom 120 is located at an end of the plurality of telescopic booms far from the basic boom 110, and the first telescopic boom 120, a second telescopic boom 130, and a third telescopic boom 140 are sequentially disposed; a first rotating wheel 132 is arranged at the head of the second telescopic arm 130, a second rotating wheel 134 is arranged at the tail of the second telescopic arm 130, and the first rotating wheel 132 and the second rotating wheel 134 are positioned at two opposite sides of the second telescopic arm 130; the first cable 142 bypasses the first rotating wheel 132, and both ends of the first cable 142 are connected with the arm tail of the first telescopic arm 120 and the arm tail of the third telescopic arm 140 respectively; the second cable 144 is wound around the second rotating wheel 134, and two ends of the second cable 144 are respectively connected with the arm tail of the first telescopic arm 120 and the arm head of the third telescopic arm 140; a fourth telescopic arm 150 is further provided between the third telescopic arm 140 and the base arm 110, arm pin assemblies 160 are provided at the tails of the other telescopic arms between the base arm 110 and the first telescopic arm 120, respectively, the arm pin assemblies 160 are used to lock or unlock the adjacent telescopic arms, a telescopic cylinder 170 is provided in the base arm 110, and the telescopic cylinder 170 can be connected to the second telescopic arm 130, the third telescopic arm 140, or the fourth telescopic arm 150 through the cylinder pin assemblies 180, respectively.
First, since the crane boom 100 is extended and contracted by a plurality of telescopic booms nested in the base boom 110, the cross-sectional size of the last telescopic boom (i.e., the first telescopic boom 120) is small, and the boom pin assembly 160 cannot be provided, in this embodiment, the first telescopic boom 120, the second telescopic boom 130, and the third telescopic boom 140, which are sequentially provided, are connected by a rope row, the boom head of the second telescopic boom 130 is provided with the first rotating wheel 132, the tail of the second telescopic boom 130 is provided with the second rotating wheel 134, and the first rotating wheel 132 and the second rotating wheel 134 are located on opposite sides of the second telescopic boom 130; the first cable 142 bypasses the first rotating wheel 132, and both ends of the first cable 142 are connected with the arm tail of the first telescopic arm 120 and the arm tail of the third telescopic arm 140 respectively; the second cable 144 is wound around the second rotating wheel 134, and both ends of the second cable 144 are connected to the arm tail of the first telescopic arm 120 and the arm head of the third telescopic arm 140, respectively. With the above-described connection, the first telescopic arm 120 can be telescopically fixed without providing the arm pin assembly 160. When the telescopic arm pin assembly is used, the telescopic oil cylinder 170 is only used for controlling the extension or retraction of the second telescopic arm 130, the first telescopic arm 120 can be synchronously extended or retracted, and the second telescopic arm 130 is fixed by the arm pin assembly 160 after the preset position is reached.
Secondly, the present embodiment is suitable for a crane with multiple sections of arms, a fourth telescopic arm 150 is further disposed between the third telescopic arm 140 and the base arm 110, arm pin assemblies 160 are respectively disposed at the tail ends of other telescopic arms between the base arm 110 and the first telescopic arm 120, the arm pin assemblies 160 are used for locking or unlocking adjacent telescopic arms, when the third telescopic arm 140 needs to be extended after the first telescopic arm 120 and the second telescopic arm 130 are extended and fixed, the telescopic cylinder 170 and the third telescopic arm 140 are fixed through the cylinder pin assemblies 180, when the third telescopic arm 140 is extended to a proper position, the arm head of the third telescopic arm 150 is locked through the arm pin assemblies 160, and after the third telescopic arm 140 and the telescopic cylinder 170 are locked and fixed, the third telescopic arm 140 and the telescopic cylinder 170 are disconnected through the cylinder pin assemblies 180. If the fourth telescopic arm 150 is extended, the same method may be used.
Third, the first cable 142 is wound around the first rotating wheel 132, and the second cable 144 is wound around the second rotating wheel 134, and the "winding" specifically means that the first cable 142 passes through the outer ring of the first rotating wheel 132, so that the first cable 142 changes the direction of the applied force. Likewise, the second cable 144 passes through the outer race of the second rotating wheel 134, so that the second cable 144 changes the direction of the applied force to ensure the synchronous extension and contraction of the first telescopic arm 120 and the second telescopic arm 130.
The telescopic boom 100 of the crane provided by the embodiment of the invention has multiple sections of telescopic booms nested in the basic boom 110, wherein the first telescopic boom 120 is located at the end of the multiple sections of telescopic booms far away from the basic boom 110, and the first telescopic boom 120, the second telescopic boom 130 and the third telescopic boom 140 are sequentially arranged, so that the first telescopic boom 120, the second telescopic boom 130 and the third telescopic boom 140 can be gradually extended or retracted. The first rotating wheel 132 arranged on the head of the second telescopic arm 130, the second rotating wheel 134 arranged on the tail of the second telescopic arm 130, and the first cable 142 bypassing the first rotating wheel 132, so that the two ends of the first cable 142 are respectively connected with the tail of the first telescopic arm 120 and the tail of the third telescopic arm 140, and the second cable 144 bypasses the second rotating wheel 134, and the two ends of the second cable 144 are respectively connected with the tail of the first telescopic arm 120 and the head of the third telescopic arm 140, when the telescopic cylinder 170 drives the second telescopic arm 130 to extend or retract, the first telescopic arm 120 and the second telescopic arm 130 are simultaneously driven to extend or retract through the first cable 142 and the second cable 144, when in use, the extending or retracting of the second telescopic arm 130 is controlled through the telescopic cylinder 170, the first telescopic arm 120 can synchronously extend or retract, after reaching the preset position, the second telescopic arm 130 is fixed by using the arm pin assembly 160, the third and fourth telescoping arms 140, 150 may be extended as needed and then secured using the arm pin assembly 160. According to the telescopic boom 100 of the crane provided by the embodiment of the invention, the boom pin assembly 160 is not required to be arranged on the first telescopic boom 120, so that the telescopic efficiency is improved, the problem that the boom pin assembly 160 cannot be arranged due to the small cross section of the tail boom can be solved, and the applicability of the crane can be improved.
As shown in fig. 1 and 3, the telescopic cylinder 170 includes a cylinder body 172 and a piston rod 174 connected to the cylinder body 172, the piston rod 174 is hinged to the rear end of the base arm 110, and a cylinder pin assembly 180 is provided at one end of the cylinder body 172 near the rear end of the base arm 110 to connect the cylinder body 172 to any one of the telescopic arms between the base arm 110 and the first telescopic arm 120.
Specifically, in an initial state, the multiple telescopic booms are all nested in the base boom 110, when boom extension operation is required, the cylinder body 172 of the telescopic cylinder 170 is connected with the second telescopic boom 130 through the cylinder pin assembly 180, when the piston rod 174 is pushed out, the cylinder body 172 is forced to move due to the fact that the piston rod 174 is hinged to the boom tail of the base boom 110, and then the second telescopic boom 130 is pushed to extend out, and when the second telescopic boom 130 extends out to a proper position, the boom tail of the second telescopic boom 130 is fixedly connected with the boom head of the third telescopic boom 140 through the boom pin assembly 160. When the tail of the second telescopic arm 130 is fixedly connected with the head of the third telescopic arm 140, the cylinder 172 can be disconnected from the second telescopic arm 130 and then connected with other telescopic arms to be extended. For example, when the third telescopic arm 140 or the fourth telescopic arm 150 needs to be sequentially extended, the third telescopic arm or the fourth telescopic arm may be sequentially extended and fixed by the above method.
As shown in fig. 2, the first connecting seats 146 are respectively arranged at the positions where the arm tail of the first telescopic arm 120 and the arm tail of the third telescopic arm 140 are connected with the first cable 142; the arm tail of the first telescopic arm 120 and the arm head of the third telescopic arm 140 are respectively provided with a second connecting seat 148 where the second cable 144 is connected.
So, when first cable 142 or second cable 144 wear out ageing, make things convenient for the change of first cable 142 or second cable 144 to, through first connecting seat 146 and second connecting seat 148, make the installation of first cable 142 and second cable 144 fixed convenient and reliable more, stability when being favorable to promoting telescopic boom and using.
As shown in fig. 2, the opposite sides of the second telescopic arm 130 are respectively provided with a via hole 136 for passing a first cable 142 and a second cable 144.
Thus, the first cable 142 passes through the first rotation wheel 132 and then passes through the second telescopic arm 130 to be connected with the tail end of the third telescopic arm 140. In addition, the arm tail of the second telescopic arm 130 is conveniently connected with the second rotating wheel 134 through the second inhaul cable 144, and stable transmission is facilitated.
Optionally, the fourth telescopic arm 150 includes at least two sections, adjacent fourth telescopic arms 150 are sequentially nested, and the fourth telescopic arms 150 at two ends are nested with the base arm 110 and the third telescopic arm 140 respectively.
Specifically, each section of the fourth telescopic boom 150 is correspondingly provided with a boom pin assembly 160, and for a 5-section boom crane, only one section of the fourth telescopic boom 150 is required. For a crane with more sections of arms, such as 6 sections of arms or 8 sections of arms, a fourth telescopic arm 150 with more sections is needed to ensure the diversified requirements of the telescopic arm 100 of the crane, so as to meet different working conditions.
Alternatively, the first rotating wheel 132 and the second rotating wheel 134 are both fixed pulleys, and the first pulling cable 142 and the second pulling cable 144 are both steel cables.
Specifically, when first rotation wheel 132 and the equal fixed pulley of second rotation wheel 134, the outer fringe of first rotation wheel 132 and second rotation wheel 134 can be provided with the recess, makes things convenient for better laminating between wire rope and the fixed pulley, is favorable to promoting the stability that the transmission is.
Alternatively, the first and second rotating wheels 132 and 134 are both sprockets, and the first and second cables 142 and 144 are both chains.
So, through the cooperation between sprocket and the chain, more steady reliable when being favorable to making the transmission, break away from for preventing between sprocket and the chain, can set up the baffle on the fixing base that sets up the sprocket, promote the reliability of cooperation department.
Alternatively, as shown in fig. 2, a first cable 142 is positioned in the active space between the first telescopic arm 120 and the second telescopic arm 130, and a second cable 144 is positioned in the active space between the first telescopic arm 120 and the second telescopic arm 130 and between the second telescopic arm 130 and the third telescopic arm 140.
Therefore, the first cable 142 and the second cable 144 are located in the inner space of the crane telescopic arm 100, the first cable 142 and the second cable 144 are not exposed outside, and when the crane telescopic arm works, the first cable 142 and the second cable 144 are prevented from being torn off or scratched by an external object, so that the stability of the first cable 142 and the second cable 144 in use is improved.
The embodiment of the invention also discloses a crane, which comprises the crane telescopic arm 100 of the embodiment. The crane comprises the same structure and benefits as the crane telescopic boom 100 in the previous embodiment. The structure and advantages of the telescopic boom 100 of the crane have been described in detail in the foregoing embodiments, and will not be described in detail herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The telescopic arm of the crane is characterized by comprising a basic arm and a plurality of sections of telescopic arms nested in the basic arm, wherein a first telescopic arm is positioned at the tail end of the plurality of sections of telescopic arms far away from the basic arm, and the first telescopic arm, a second telescopic arm and a third telescopic arm are sequentially arranged; the arm head of the second telescopic arm is provided with a first rotating wheel, the arm tail of the second telescopic arm is provided with a second rotating wheel, and the first rotating wheel and the second rotating wheel are positioned on two opposite sides of the second telescopic arm; a first inhaul cable bypasses the first rotating wheel, and two ends of the first inhaul cable are respectively connected with the arm tail of the first telescopic arm and the arm tail of the third telescopic arm; a second inhaul cable bypasses the second rotating wheel, and two ends of the second inhaul cable are respectively connected with the arm tail of the first telescopic arm and the arm head of the third telescopic arm; and a fourth telescopic arm is further arranged between the third telescopic arm and the basic arm, arm pin assemblies are respectively arranged at the tail ends of other telescopic arms between the basic arm and the first telescopic arm, the arm pin assemblies are used for locking or unlocking the adjacent telescopic arms, a telescopic oil cylinder is arranged in the basic arm, and the telescopic oil cylinder can be respectively connected with the second telescopic arm, the third telescopic arm or the fourth telescopic arm through the cylinder pin assemblies.
2. The telescopic arm of crane as claimed in claim 1, wherein the telescopic cylinder comprises a cylinder body and a piston rod connected to the cylinder body, the piston rod is hinged to the tail end of the base arm, and the cylinder pin assembly is disposed at one end of the cylinder body near the tail end of the base arm so as to connect the cylinder body to any one of the telescopic arms between the base arm and the first telescopic arm.
3. The telescopic arm of the crane as claimed in claim 1, wherein the arm tail of the first telescopic arm and the arm tail of the third telescopic arm are respectively provided with a first connecting seat where the first cable is connected; and the arm tail of the first telescopic arm and the arm head of the third telescopic arm are connected with the second inhaul cable, and second connecting seats are respectively arranged at the positions of the second inhaul cable.
4. The telescopic boom of a crane as claimed in claim 3, wherein the opposite sides of the second telescopic boom are respectively provided with a via hole for passing the first cable and the second cable.
5. The telescopic crane jib according to claim 1, wherein said fourth telescopic jib comprises at least two segments, adjacent to said fourth telescopic jib are nested in sequence, and said fourth telescopic jib at both ends are nested with said base jib and said third telescopic jib, respectively.
6. The telescopic arm of a crane as claimed in any one of claims 1 to 5, wherein the first rotating wheel and the second rotating wheel are both fixed pulleys, and the first cable and the second cable are both steel cables.
7. The telescopic boom of a crane as claimed in any one of claims 1 to 5, wherein said first and second rotating wheels are both sprockets and said first and second cables are both chains.
8. The telescopic crane jib according to claim 1, wherein said first guy cable is located in the active space between said first telescopic jib and said second telescopic jib, and said second guy cable is located in the active space between said first telescopic jib and said second telescopic jib and between said second telescopic jib and said third telescopic jib.
9. A crane comprising a telescopic crane jib according to any of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911390794.6A CN110980555A (en) | 2019-12-27 | 2019-12-27 | Telescopic arm of crane and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911390794.6A CN110980555A (en) | 2019-12-27 | 2019-12-27 | Telescopic arm of crane and crane |
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| Publication Number | Publication Date |
|---|---|
| CN110980555A true CN110980555A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911390794.6A Pending CN110980555A (en) | 2019-12-27 | 2019-12-27 | Telescopic arm of crane and crane |
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| CN (1) | CN110980555A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4311964A1 (en) * | 1993-04-10 | 1994-10-13 | Krupp Ag Hoesch Krupp | Telescopic boom crane |
| CN201694761U (en) * | 2009-12-04 | 2011-01-05 | 三一汽车制造有限公司 | Main arm telescopic mechanism and automobile crane with same |
| CN102285598A (en) * | 2011-06-22 | 2011-12-21 | 三一汽车起重机械有限公司 | Multi-section arm telescopic device and crane with same |
| CN103058077A (en) * | 2012-12-27 | 2013-04-24 | 三一重工股份有限公司 | A crane and a boom thereof |
| CN103407909A (en) * | 2013-08-09 | 2013-11-27 | 中联重科股份有限公司 | Telescopic device of arm frame, arm frame and engineering machinery |
-
2019
- 2019-12-27 CN CN201911390794.6A patent/CN110980555A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4311964A1 (en) * | 1993-04-10 | 1994-10-13 | Krupp Ag Hoesch Krupp | Telescopic boom crane |
| CN201694761U (en) * | 2009-12-04 | 2011-01-05 | 三一汽车制造有限公司 | Main arm telescopic mechanism and automobile crane with same |
| CN102285598A (en) * | 2011-06-22 | 2011-12-21 | 三一汽车起重机械有限公司 | Multi-section arm telescopic device and crane with same |
| CN103058077A (en) * | 2012-12-27 | 2013-04-24 | 三一重工股份有限公司 | A crane and a boom thereof |
| CN103407909A (en) * | 2013-08-09 | 2013-11-27 | 中联重科股份有限公司 | Telescopic device of arm frame, arm frame and engineering machinery |
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Application publication date: 20200410 |