WO2012159385A1

WO2012159385A1 - Crane, jib structure thereof, and jib lifting method

Info

Publication number: WO2012159385A1
Application number: PCT/CN2011/078800
Authority: WO
Inventors: 丁慧智; 张玉柱; 李自军; 万晓
Original assignee: 长沙中联重工科技发展股份有限公司; 湖南中联重科专用车有限责任公司
Priority date: 2011-05-26
Filing date: 2011-08-23
Publication date: 2012-11-29
Also published as: CN102275833B; CN102275833A

Abstract

Disclosed are a crane, a jib structure thereof, and a jib lifting method. The jib structure comprises: a main jib (10), having a first end being connected to the main body of a vehicle; a secondary jib (20), having a first end being rotatably connected to a second end of the main jib (10); a secondary jib front support rod (23), having a first end being connected to the first end of the secondary jib (20); a secondary jib rear support rod (22), having a first end being connected to the second end of the main jib (10); an amplitude variable cable (24), connected between a second end of the secondary jib front support rod (23) and a second end of the secondary jib rear support rod (22); and a first anti-slant rod (232), connected between a location nearby the first end of the secondary jib (20) and the secondary jib front support rod (23), so as to support the secondary jib front support rod (23). The jib structure greatly reduces the space required for jib assembling, disassembling, jib lifting and jib lowering, reduces the time of the operations and facilitates saving of the operation costs.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane, a boom structure and a boom raising method, and in particular to a boom structure, a crane having the boom structure, and a boom structure The arm method. BACKGROUND OF THE INVENTION In the prior art, in the field of cranes, in order to achieve a high lifting work height, the boom structure of the main arm plus the variable jib is often used in operation. However, such a structure causes an increase in the length of the boom, so that when the boom structure is assembled, disassembled, or when the crane is subjected to arming and arming operations, a sufficiently large work site is required to complete the above operation. In many cases, the working site of the crane is limited. If the above-mentioned boom structure is adopted, the installation and arming operation of the entire boom structure cannot be smoothly performed. In this way, the crane must be moved to a site with a large space for assembly and the arm is completed, and then the crane is moved to the work site for lifting work. This undoubtedly increases the operating time and is not conducive to saving operating costs. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the present invention provides a boom structure, a crane having the boom structure, and a boom raising method of the boom structure, by which the boom structure and the boom method are greatly The space required for the assembly, disassembly, lifting and lowering of the boom is reduced, the time for the above operation is reduced, and the operating cost is saved. According to an aspect of the invention, a boom structure is provided, the boom structure comprising: a main arm, the first end being coupled to a body of the vehicle; the jib being rotatably coupled to the first end a second end of the main arm; a jib front strut connected to the first end of the jib at a first end; a jib rear struts connected to the second end of the main arm at a first end a variator cable coupled between the second end of the jib front strut and the second end of the jib rear strut; and a first anti-roll bar coupled to the first end of the jib Between the jib front struts and the jib front struts to support the jib front struts. Further, the boom structure further includes: a bracket mounted on the second end of the main arm to selectively support the variator cable. Further, the boom structure further includes: a main arm pull plate, one end is connected to the vehicle, the other end is connected to the second end of the main arm; the jib front pull plate is connected to the jib at one end Near the second end, the other end is connected to the jib front strut; and the jib rear pull plate is connected at one end to the vicinity of the first end of the main arm and at the other end to the jib rear strut. Further, the auxiliary arm includes: a bottom arm located at a first end of the auxiliary arm; a top arm located at a second end of the auxiliary arm and connected with a hook; and at least one intermediate arm, connected Between the bottom section arm and the top section arm. Further, the boom structure further includes: a second anti-roll bar connected between the second end of the main arm and the jib rear strut to support the jib rear strut; The jib anti-roll bar has one end connected to the second end of the main arm and the other end being a free end slidably supporting the jib. Further, the bracket includes a first support rod and a second support rod, and the first support rod and the second support rod are respectively connected to different positions of the second end of the main arm at respective first ends And the first support rod and the second support rod are connected to each other at a respective second end in a direction away from the main arm. Further, the boom structure further includes: a traction device selectively coupled to the second end of the secondary arm to be capable of pulling the secondary arm toward an assembly position, in the assembled position The jib is stacked under the main arm. Further, the traction device is a hoisting mechanism. According to another aspect of the invention, a crane is provided, the crane comprising a boom structure having the features described above. According to still another aspect of the present invention, there is provided a boom raising method of a boom structure, the boom structure comprising a main arm and a sub-arm, the method comprising: a) connecting the first end of the main arm to a main body of the crane, connecting a main arm pull plate between the crane and the second end of the main arm to pull the main arm to a certain distance from the ground; b) under the main arm, a first end of the jib is pivotally connected to the second end of the main arm such that the jib is in an assembled position stacked under the main arm; c) a first end of the jib rear struts Connecting to the second end of the main arm, connecting the first end of the jib front strut to the first end of the jib, and connecting the variator to the second end of the jib front strut Between the second end of the jib rear strut (22); d) connecting the jib rear pull plate between the first end of the main arm and the jib rear strut; e) continuing to pull up the main arm to relax the variator so that the pair a second end of the front struts of the arms hangs down to the ground, and a first anti-roll bar is coupled between the first end of the jib and the jib front struts, the first anti-roll bar is used for supporting The jib front struts; f) continuing to pull up the main arm, connecting the jib front pull plate between the second end of the jib and the jib front struts; and g) continuing to pull Starting the main arm, tightening the variator cable, and placing the jib in a hoisting position for hoisting work. Further, the step c) further includes: mounting a bracket on the second end of the main arm to selectively support the variator cable. Further, the step f) further includes: connecting a second anti-roll bar between the main arm and the jib rear strut, the second anti-roll bar supporting the jib rear strut and preventing The jib rear strut is tilted; and the jib anti-roll bar is coupled to the second end of the main arm, the jib anti-roll bar slidably supporting the jib by its free end. According to the boom structure and the arm raising method of the present invention, the luffing sub-arm can be smoothly placed under the main arm, and the luffing sub-arm can be disposed at an assembly position below the main arm and a lifting position for lifting work. Pivoting, thus achieving a higher lifting (lifting) height while effectively reducing the space required to assemble the boom structure and operate the boom structure, and due to the assembly, booming, arming and dismounting operations of the boom structure It can be completed smoothly at the job site, so there is no need to transfer the crane to other sites before the operation, which greatly saves operating time and saves operating costs. The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawings: FIG. 1 shows a crawler crane having a boom structure according to an embodiment of the present invention, wherein the boom structure is in a folded state, and the variable amplitude jib is foldedly positioned below the main arm to be in an assembled position; 2 shows a crawler crane having a boom structure according to an embodiment of the present invention, wherein the boom structure is in a hoisting state, and the variable jib is rotated away from the crane body to a hoisting height of the crane to be in a hoisting position; Figures 3a to 3h show the assembly and booming process of the boom structure shown in Figures 1 and 2; Figures 4 and 5 show the portion of the joint between the main arm and the jib in Figures 3d and 3e, respectively. Enlarged view, wherein FIG. 4 clearly shows the jib front struts, the jib rear struts, and the horn wire rope, and FIG. 5 clearly shows the cradle and the jib anti-roll bar; FIG. 6 shows the yoke of FIG. 3e Another partially enlarged view of the bracket is clearly shown; Figures 7a through 7f show the booming and dismounting process of the boom structure shown in Figures 1 and 2. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a boom structure and an operation thereof of the present invention will be described in detail by taking a crawler crane as an example with reference to the accompanying drawings in conjunction with the embodiments. 1 shows a crawler crane having a boom structure according to an embodiment of the present invention, wherein the boom structure is in a folded state, the variable amplitude jib is foldedly positioned below the main arm; and FIG. 2 shows A crawler crane having a boom structure according to an embodiment of the invention, wherein the boom structure is in a hoisting state, and the variable jib is rotated away from the crane body to a hoisting height of the crane. Referring to Figures 1 and 2, a boom structure according to an embodiment of the present invention includes: a main arm 10 coupled to a main body of the crane at a first end; and a sub-arm 20 foldably positioned below the main arm 10 and rotatable around the main The arm 10 rotates. Specifically, the jib 20 is rotatably coupled to the second end of the main arm 10 at a first end and the jib 20 has an assembled position below the main arm 10 (as shown in FIG. 1) and a hoisting position for lifting work ( As shown in FIG. 2, the jib 20 is pivotable about the second end of the main arm 10 between the hoisting position and the assembled position. The main arm pull plate 12 is connected at one end to the mast 32 of the crane and at the other end to the second end of the main arm 10. A jib front strut 23 is connected at a first end of the jib 20, a jib rear strut 22 is connected at a second end of the main arm 10, and a jib front strut 23 and a jib rear strut A variable amplitude wire rope (variable cable) 24 is connected between the two. The jib front pull plate 29 is coupled at one end to the second end of the jib 20 and at the other end to the jib front strut 23, the jib back pull plate 28 being coupled at one end to the first end of the main arm 10 and at The other end is connected to the jib rear strut 22. In the boom structure of the embodiment of the present invention, in particular, a bracket 26 is mounted on the second end of the main arm 10, and the bracket 26 can support the luffing wire rope 24 during rotation of the sub-arm 20 about the main arm 10. The rotation of the interfering arm 20 in the main arm 10 or the sub-arm 20 is prevented from being caught by the luffing wire rope 24. This will be described in detail below. In the boom structure of the embodiment of the present invention, in particular, an anti-roll bar 232 is connected between the first end of the jib 20 and the jib front strut 23 to support the jib front strut 23 and prevent The jib front stay 23 is inclined downward due to gravity during the rotation of the jib 20 about the main arm 10, which will be described in detail below. In addition, an anti-roll bar 222 is connected between the second end of the main arm 10 and the jib rear strut 22 to support the jib rear strut 22; and a jib arm is connected to the second end of the main arm 10 A tilting lever 25, the free end of the secondary arm anti-roll bar 25 slidably contacts and supports the secondary arm 20. As will be appreciated by those skilled in the art, the jib 20 can take the form of a multi-section arm jib, as shown in FIG. 3c, the jib 20 can include: a yoke arm 202 at a first end of the jib 20 a top arm 206 at a second end of the jib 20; and at least one intermediate arm 204 between the bottom arm 202 and the top arm 206. The hook 208 can be coupled to the top arm 206 of the jib by a hoisting wire 209 (shown in Figure 7a). Moreover, in this embodiment, as shown in Figure 7b, the boom structure can further include a traction device 40 that is selectively connectable to the second end of the secondary arm 20 to face the secondary arm 20 The assembly position shown in Fig. 1 is pulled so that the jib 20 is placed under the main arm 10 in a folded manner. Preferably, the traction device 40 can be a hoisting mechanism. The operation of the boom structure according to an embodiment of the present invention will be described in detail below with reference to Figs. 3a-3h, Figs. 4-6 and Figs. 7a-7f, wherein Figs. 3a to 3h show the crane shown in Figs. 1 and 2 Assembly of the arm structure and booming process; Figures 4 to 7 show a partial enlarged view of Figures 3d and 3e, respectively; and Figures 7a to 7f show the arm of the boom structure shown in Figures 1 and 2 And the disassembly process. As shown in Figure 3a, the first end of the main arm 10 is coupled to the crane body and the main arm pull plate 12 is coupled between the mast 32 of the crane and the second end of the main arm 10. As shown in Fig. 3b, the main arm pull plate 12 is lifted by the mast 32 so that the main arm 10 is kept at a certain distance from the ground, and then the bottom joint arm 202 at the first end of the jib 20 is pivotally connected to the lower side of the main arm 10 to The second end of the main arm 10 is such that the sub-arm 20 is in an assembled position that is stacked below the main arm 10. As shown in Fig. 3c, next, the intermediate arm 204 of the jib 20 and the top arm 206 are sequentially mounted. At this time, the jib 20 is in an assembled position, wherein the jib 20, specifically, the jib arm 202 can be hoisted around the second end of the main arm 10 in the hoisting position (as shown in FIG. 2) and assembled Pivot between positions (Figure 1). As shown in FIG. 3d, one end of the jib rear strut 22 is connected to the second end of the main arm 10, and one end of the jib front strut 23 is connected to the first end of the jib 20, and then becomes The web wire 24 is coupled between the other end of the jib front strut 23 and the other end of the jib rear strut 22. Figure 4 shows a partial enlarged view of Figure 3d, wherein The relationship between the jib front stay 23, the jib rear stay 22, and the horn rope 24 is clearly shown. Next, as shown in FIG. 3e, the jib rear pull plate 28 is connected between the main arm 10 and the jib rear strut 22; and the anti-tip is connected between the main arm 10 and the jib rear strut 22. a rod 222 for supporting the jib rear strut 22 and preventing the jib rear strut 22 from tilting toward the main arm 10; connecting the jib anti-roll bar 25 on the second end of the main arm 10, the jib anti-roll bar 25 The free end is slidably contactable and supports the jib 20; and the bracket 26 is mounted at the second end of the main arm. Figure 5 is a partial enlarged view of Figure 3e, in which the bracket 26 and the anti-roll bar 222 and the anti-roll bar 25 are clearly shown. In this embodiment, as shown in FIG. 6 (another partial enlarged view of FIG. 3e), the bracket 26 includes a first support rod 262 and a second support rod 264, and the first support rod 262 and the second support rod 264 are respectively Connected to the second end of the main arm 10 at different positions at the first end, and connected to each other at a second end in a direction away from the main arm 10, whereby the first support rod 262 and the second support rod 264 and the main arm The second end of 10 constitutes a stable triangular structure and bracket 26 is used to selectively support the slinger wire 24, as will be described in more detail below. During this time, the hook 208 can also be coupled to the top arm 206 by a raised wire. Then, as shown in Fig. 3f, the main arm 10 is lifted, and the luffing wire 24 of the sub-arm 20 is loosened by a hoisting mechanism (not shown), so that the end of the jib front strut 23 connected to the luffing wire rope 24 is inclined downward. And hang down to the ground. Next, an anti-roll bar 232 is coupled between the first end of the jib 20 and the jib front strut 23 to support the jib front strut 23. Next, as shown in Fig. 3g, the main arm 10 is continuously lifted, the luffing wire 24 of the jib 20 is released, and the jib front puller 29 is connected between the second end of the jib 20 and the jib front support bar 23. In the boom structure of the embodiment of the present invention, as shown in Fig. 3g, since the bracket 26 is provided at the second end of the main arm 10, the longer luff wire 24 can be supported by the bracket 26 without The main arm 10 and the jib 20 interfere with each other, which enables the jib 20 to be smoothly operated to rotate the jib 20 around the main arm 10. Next, as shown in Fig. 3h, the arming operation is performed, specifically, the main arm 10 is continuously lifted and the luffing wire rope 24 is gradually tightened, and finally the boom structure is armed to the lifting position as shown in Fig. 2. As also shown in Fig. 3h, since the bracket 26 is provided at the second end of the main arm 10, the longer slinger 24 can be supported by the bracket 26 without interfering with the main arm 10 and the jib 20. This makes it possible to smoothly operate the jib 20 to rotate the jib 20 around the main arm 10. After the lifting operation of the crane is completed, the booming and dismounting of the boom structure can be completed as shown in Figs. 7a to 7f. Specifically, first, as shown in FIG. 7a, the main arm 10 is lowered by operating the mast 32, and the luffing wire 24 is relaxed, so that the sub-arm 20 is rotated about the main arm 10 until the second end of the sub-arm 20 approaches the ground, and the hook is released. 208 lift The wire rope is such that the hook 208 contacts the ground and is removed. In the meantime, since the bracket 26 is provided at the second end of the main arm 10, the longer luff wire 24 can be supported by the bracket 26 without interfering with the main arm 10 and the sub-arm 20, which enables The jib 20 is smoothly operated to rotate the jib 20 around the main arm 10. Further, since the anti-roll bar 232 is connected between the jib front stay 23 and the jib 20, the jib front stay 23 can be supported and the jib front stay 23 can be prevented from falling due to gravity, which makes The jib 20 can be operated smoothly. Next, as shown in Figure 7b, the main arm 10 continues to be lowered, and the jib 20 is then lowered, connecting the traction device 40 to the second end of the jib 20. As shown in Figure 7c, the secondary arm 20 is pulled by the traction device 40 toward the assembled position such that the secondary arm 20 is stacked below the primary arm 10. At this time, the jib front pull plate 29 can be removed. In the meantime, since the bracket 26 is provided at the second end of the main arm 10, the elongated sling wire 24 can be supported by the bracket 26 without interfering with the main arm 10 and the jib 20, which enables The jib 20 is smoothly operated to rotate the jib 20 around the main arm 10. Preferably, the traction device 40 can employ a hoisting mechanism. As shown in Fig. 7d, the slinger wire 24 is tightened so that the jib front stay 23 is inclined away from the main arm 10, and the anti-roll bar 232 of the jib front stay 23 is removed. As shown in Fig. 7e, the remaining components are sequentially removed in the reverse order of the above assembly. Finally, as shown in Fig. 7f, the jib 20 is detached from the main arm 10. As can be understood by those skilled in the art, the connection between the components of the boom structure of the embodiment of the present invention may be hinged, or other connection methods commonly used in the art may be employed. It will also be understood by those skilled in the art that although a crawler crane is employed in the above embodiment, the boom structure can also be applied to vehicles such as other types of cranes. According to the boom structure of the above embodiment of the present invention, since the bracket 26 capable of supporting the variable amplitude wire rope 24 is provided at the second end of the main arm 10, the sub-arm 20 can be smoothly rotated around the main arm 10 for assembly or disassembly. Thus, the sub-arm 20 can be foldedly mounted under the main arm 10, and the luffing sub-arm 20 can be pivoted between an assembly position located below the main arm 10 and a lifting position for lifting work, thereby achieving a higher The lifting height effectively reduces the space required to assemble the boom structure and operate the boom structure, and since the assembly, booming, arming and dismounting operations of the boom structure can be successfully completed at the job site, there is no need for work The transfer of the crane to other sites before, saves a lot of operating time and saves operating costs. The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A boom structure, characterized in that the boom structure comprises:

a main arm (10), the first end being connected to the body of the vehicle;

a jib (20), the jib (20) being rotatably coupled to the J of the main arm (10) at a first end;

a jib front strut (23) coupled to the first end of the jib (20) at a first end; a jib rear strut (22) coupled to the main arm (10) at a first end a second end; a variator (24) coupled between the second end of the jib front strut (23) and the second end of the jib rear strut (22);

A first anti-roll bar (232) is coupled between the first end of the jib (20) and the jib front struts (23) to support the jib front struts (23).

2. The boom structure according to claim 1, wherein the boom structure further comprises:

A bracket (26) is mounted on the second end of the main arm (10) to selectively support the variator cable (24).

3. The boom structure according to claim 1 or 2, wherein the boom structure further comprises: a main arm pull plate (12) connected to the vehicle at one end and to the main arm at the other end (10) of J;

a jib front pull plate (29) having one end connected to the second end of the jib (20) and the other end connected to the jib front stay (23);

A jib rear pull plate (28) is coupled at one end to the vicinity of the first end of the main arm (10) and at the other end to the jib rear strut (22).

The boom structure according to claim 1 or 2, wherein the jib (20) comprises: a bottom section arm (202) located at a first end of the jib (20);

a top arm (206) at a second end of the jib (20) and connected with a hook (208); and

At least one intermediate arm (204) is coupled between the bottom section arm (202) and the top section arm (206). The boom structure according to claim 1 or 2, wherein the boom structure further comprises: a second anti-roll bar (222) connected to the second end of the main arm (10) Between the jib rear struts (22) to support the jib rear struts (22);

The jib anti-roll bar (25) has one end connected to the second end of the main arm (10) and the other end being a free end, the free end slidably supporting the jib (20).

A boom structure according to claim 2, wherein said bracket (26) includes a first support rod (262) and a second support rod (264), said first support rod (262) and The second support rods (264) are respectively connected to different positions of the second end of the main arm (10) at respective first ends, and the first support rods (262) and the second support rods ( 264) are connected to each other at a respective second end in a direction away from the main arm (10).

The boom structure according to claim 1 or 2, wherein the boom structure further comprises: a traction device (40), the traction device (40) being selectively coupled to the secondary arm (20) The second end is capable of pulling the jib (20) toward an assembly position in which the jib (20) is stacked below the main arm (10).

The boom structure according to claim 7, characterized in that the traction means (40) is a hoisting mechanism.

A crane characterized by comprising the boom structure according to any one of claims 1-8.

A booming method for a boom structure, the boom structure comprising a main arm (10) and a jib (20), wherein the method comprises:

a) connecting the first end of the main arm (10) to the main body of the crane, connecting the main arm pull plate (12) between the crane and the second end of the main arm (10) to The main arm (10) is pulled up to a certain distance from the ground;

b) under the main arm (10), pivoting the first end of the jib (20) to the second end of the main arm (10) such that the jib (20) is in a stack Placed in an assembled position below the main arm (10);

c) connecting the first end of the jib rear strut (22) to the second end of the main arm (10), connecting the first end of the jib front strut (23) to the jib (20) a first end, and connecting a variator cable (24) between the second end of the jib front strut (23) and the second end of the jib rear strut (22);

d) connecting the jib rear pull plate (28) between the first end of the main arm (10) and the jib rear strut (22); e) continuing to pull up the main arm (10), loosening the variator cable (24), causing the second end of the jib front struts (23) to hang down to the ground, and the first anti-roll bar (232) Connecting between the first end of the jib (20) and the jib front struts (23), the first anti-roll bar (232) for supporting the jib front struts ( twenty three );

f) continuing to pull up the main arm (10), connecting the jib front pull plate (29) between the second end of the jib (20) and the jib front struts (23);

g) Continue to pull up the main arm (10), tighten the variator (24), and place the jib in a hoisting position for lifting work.

11. The method of raising an arm according to claim 10, wherein the jib (20) comprises:

a bottom section arm (202) located at a first end of the jib (20);

At least one intermediate arm (204) is coupled between the bottom section arm (202) and the top section arm (206).

12. The method of raising an arm according to claim 10, wherein said step c) further comprises: mounting a bracket (26) on the second end of said main arm (10) for selective support The variable width cable (24).

13. The method of raising arms according to claim 12, wherein the bracket (26) comprises a first support rod (262) and a second support rod (264), the first support rod (262) And the second support rod

(264) at respective first ends respectively connected to different positions of the second end of the main arm (10), and the first support bar (262) and the second support bar (264) are in respective The second ends are connected to each other in a direction away from the main arm (10).

The arm raising method according to claim 10, wherein the step 0 further comprises: connecting a second anti-tip between the main arm (10) and the jib rear strut (22) a rod (222), the second anti-roll bar (222) supports the jib rear struts (22) and prevents the jib rear struts (22) from tilting;

A jib anti-roll bar (25) is coupled to the second end of the main arm (10), the jib anti-roll bar (25) slidably supporting the jib by its free end.

The boom raising method according to claim 10, characterized in that the traction device (40) is a hoisting mechanism.