Single-double combined boom structure of crane and mast crane thereof
By adopting a single-double combined boom structure on the mast crane, combined with transition sections and bolt connections, the problem of local stress concentration in the boom was solved, thereby improving the stability and economy of the structure.
Patent Information
- Application Number
- CN202520206494.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-02-10
AI Technical Summary
The boom structure of existing mast cranes experiences localized stress concentration under the swaying force of the load, resulting in a complex and unstable structure, posing a safety hazard, especially when transporting and unloading large tonnage goods.
The system adopts a single-double combined boom structure, with a double boom at the lower section and a single boom at the upper section. A transition section is set at the transition point, and the whole connection is achieved by bolt connection to avoid the setting of connecting beams. The system uses a circular tube cross section and symmetrically arranged transition sections to improve stability.
It improves the lateral stability of the boom and the aesthetics of the overall structure, while reducing its weight and enhancing the rationality of force transmission and safety of the structure.
Smart Images
Figure CN223823253U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a crane single-double combined arm frame structure and its mast crane and belongs to hoisting machinery technical field. BACKGROUND
[0002] The mast crane is a type of the arm frame crane, is applied to the port loading and unloading goods, is divided into fixed type mast crane and mobile type mast crane. The fixed type mast crane is the mast fixed through support or rope at both ends as the basic component, relies on the hoist to drive the arm frame amplitude work through the rope. The large tonnage mast crane generally adopts the double arm structure, and two groups of arm frame structures are symmetrically arranged, the upper end hinge point is narrow, the lower hinge point is wide, so that the lateral bearing capacity is improved. The connecting beam is arranged in the middle of the two groups of arm frames to improve the stability of the arm frame. The arm frame adopts the split design, and the joints are connected between the arm sections to facilitate the installation, disassembly and transportation. Under the action of the swing force of the hoisted object, there is a large rod end internal force at the connecting beam of the arm frame, the local stress is over-limit, and then the local structure of the arm frame is complex. Due to the limitation of transportation, the connecting place of the head beam of the arm frame and the two groups of arm frames needs to be split, but the internal force and stress at the place are large, and the bearing capacity of the joint is weak. The arm frame of the mast crane is a simply supported component at both ends in the amplitude plane, and is a cantilever component in the arm frame plane. Under normal circumstances, the slenderness ratio of the arm frame in the arm frame plane is larger, and the instability is more likely to occur. The single arm structure is simple in structure and good in process, and under the action of the horizontal swing force of the arm end in the arm frame plane, the arm root is prone to a large bending moment, so the single arm structure is usually used in the occasion with small arm length. The double arm structure has two support points with large spacing, so that the overall stability of the arm frame is strengthened, and then the bearing capacity problem of each single arm is converted, and one or more connecting beams can be arranged between the two single arms of the double arm structure according to the arm length, so that the slenderness ratio of the single arm is reduced and the stability is improved. However, under the action of the horizontal load of the arm end, a large stress concentration is generated at the connecting place of the connecting beam and the single arm, so the local truss needs to be reasonably arranged, and therefore the split design of the arm frame is difficult. CONTENT OF THE UTILITY MODEL
[0003] The utility model solves the technical problem in the prior art, and proposes a crane single-double combined arm frame structure and its mast crane according to the loading and unloading requirements of the superheavy goods of the port.
[0004] To solve the technical problem, the utility model provides a crane single-double combined arm frame structure, which comprises an arm frame lower segment, an arm frame upper segment and a transition section, the arm frame lower segment is a double arm structure and is symmetrical on both sides, and the upper segment thereof is a single arm structure, the arm frame lower segment is connected by a root, a root section and a lower standard section in sequence to constitute, the arm frame upper segment is connected by an upper standard section and a head section in sequence to constitute, and the arm frame upper segment and the arm frame lower segment are connected through the transition section.
[0005] The root comprises a root beam, a root hinge seat and a root flange, and the root hinge seat and the root flange are welded on both sides of the two ends of the root beam respectively; the root is connected with the root section by the root flange through a bolt group; the arm support structure is fixed on the base through the root beam and the root hinge seat.
[0006] The root section comprises a root section structure, a root section flange and a root section joint, the root section structure is a four-square column table structure as a whole, the root section flange is welded at the bottom of the root section structure, and four root section joints are welded at the upper end of the root section structure; the root section is connected with the lower standard section through the root section joint by a bolt group, and connected with the root through the root section flange by a bolt group.
[0007] The lower standard section comprises a lower standard section structure and a lower standard section joint, the lower standard section structure is a square column structure as a whole, and eight groups of lower standard section joints are welded at the two ends of the lower standard section structure respectively; the lower standard section is connected with the root section through the lower standard section joint by a bolt group at the bottom, and connected with the transition section or the lower standard section through the lower standard section joint by a bolt group at the upper end.
[0008] The transition section is a structure of two pieces arranged symmetrically, comprising an upper horizontal rod, a lower horizontal rod, an outer chord rod, an inner chord rod, a connecting rod, a web rod, an upper joint and a lower joint, the upper joint is welded at the upper end of the upper horizontal rod, the lower joint is welded at the lower end of the lower horizontal rod, the inner chord rod and the outer chord rod are welded between the upper horizontal rod and the lower horizontal rod respectively, and the upper horizontal rod and the lower horizontal rod between the inner chord rods are welded by the connecting rods; the upper end of the transition section is connected with the upper standard section, and the lower end is connected with two lower standard sections; the upper and lower structures of the transition section are welded by a plurality of web rods; the transition section is connected with the upper standard section through the upper joint, and connected with the two lower standard sections through the lower joint respectively.
[0009] The upper horizontal rod and the lower horizontal rod are internally provided with stiffening ribs, the stiffening ribs are stiffening round plates or stiffening rectangular plates, and the stiffening ribs are arranged in a transverse or longitudinal manner.
[0010] The upper horizontal rod, the lower horizontal rod, the outer chord rod, the inner chord rod, the connecting rod and the web rod are all round pipes.
[0011] The upper standard section comprises an upper standard section structure and an upper standard section joint, the upper standard section structure is a square column structure as a whole, and eight groups of upper standard section joints are welded at the two ends of the upper standard section structure respectively; the upper end of the upper standard section is connected with the head section through the upper standard section joint by a bolt group, and the bottom is connected with the transition section through the upper standard section joint by a bolt group.
[0012] The head section comprises a head section structure, a head section joint and a head beam, the head section structure is a square column structure as a whole, the head beam is welded at the top of the head section structure, and the head section joint is welded at the lower part of the head section structure; the head section is connected with the upper section standard section by the head section joint through a bolt group.
[0013] The utility model also provides a mast crane, the mast crane is equipped with crane single double combination arm support structure.
[0014] Beneficial effect: the utility model discloses single double combination arm support structure upper section is single arm, and lower section is double arm, and the transition section is arranged to the transition of single arm and double arm, and the lateral stability is good, and setting connecting beam is avoided simultaneously.Relative single arm support, the lateral stability of single double arm support structure is better, relative double arm support, the dead weight of single double arm support structure is lighter, and the utility model has obvious advantages from technical feasibility, safety, economy and the like; the round tube section is used to each pole of transition section, and the transition section structure is symmetrically arranged, compact structure, and the force transmission is reasonable. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is the structure schematic view of the utility model arm support;
[0016] Figure 2 It is the structure schematic view of the utility model root;
[0017] Figure 3 It is the structure schematic view of the utility model root section;
[0018] Figure 4 It is the structure schematic view of the utility model lower section standard;
[0019] Figure 5 It is the structure schematic view of the utility model transition section;
[0020] Figure 6 It is the cross section schematic view of the utility model transition section;
[0021] Figure 7 It is the structure schematic view of the utility model upper section standard;
[0022] Figure 8 It is the structure schematic view of the utility model head section;
[0023] Figure 9 It is the structure schematic view of the utility model whole machine.
[0024] In the figure: 1, root; 2, root section; 3, lower standard section; 4, transition section; 5, upper standard section; 6, head section; 101, root crossbeam; 102, root hinge base; 103, root flange; 201, root section structure; 202, root section flange; 203, root section joint; 301, lower standard section structure; 302, lower standard section joint; 401, upper crossbar; 402, lower crossbar; 403, outer chord; 404, inner chord; 405, connecting rod; 406, web; 407, upper joint; 408, lower joint; 409, stiffening rib; 501, upper standard section structure; 502, upper standard section joint; 601, head section structure; 602, head section joint; 603, head crossbeam. DETAILED DESCRIPTION
[0025] The utility model will be described in detail below in combination with the drawings and examples.
[0026] As Figures 1-9 shown, the utility model provides a crane single-double combined arm support structure, including arm support lower segment, arm support upper segment and transition section 4, arm support lower segment is double -arm structure, both sides symmetry, its upper segment is single -arm structure, arm support lower segment is connected by root 1, root section 2 and lower standard section 3 in proper order and constitutes, and arm support upper segment is connected by upper standard section 5 and head section 6 in proper order and constitutes, arm support upper segment and arm support lower segment are connected through transition section 4, and the transition point of arm support selects at the golden section point, and the overall structure is beautiful, and the stress is reasonable, the structure lateral stability is good, and setting connecting beam is avoided simultaneously.
[0027] Root 1 includes root crossbeam 101, root hinge base 102 and root flange 103, and root hinge base 102 and root flange 103 are welded on both sides of the two ends of root crossbeam 101 respectively, root 1 is connected with root section 2 by root flange 103 using bolt group, and the arm support structure is fixed on the base through root crossbeam 101 and root hinge base 102, and root crossbeam 101 can offset the horizontal load generated by the axial force of root section 2 and facilitate the installation of arm support.
[0028] Root section 2 includes root section structure 201, root section flange 202 and root section joint 203, the root section structure 201 is overall four square column table type structure, the root section flange 202 is welded in the bottom of root section structure 201, and four root section joints 203 are welded in the upper end of root section structure 201, and root section 2 is connected with lower standard section 3 by root section joint 203 using bolt group and is connected with root 1 by root section flange 202 using bolt group.
[0029] The lower segment standard section 3 includes a lower segment standard section structure 301 and a lower segment standard section joint 302. The lower segment standard section structure 301 is a square column structure as a whole, and eight groups of lower segment standard section joints 302 are welded at both ends of the lower segment standard section structure 301 respectively. The lower segment standard section 3 is connected with the root section 2 through the lower segment standard section joint 302 by means of a bolt group at the bottom, and is connected with the transition section 4 or the lower segment standard section 3 through the lower segment standard section joint 302 by means of a bolt group at the upper end. According to the lifting condition, one or more lower segment standard sections 3 can be arranged on one side. When one lower segment standard section 3 is arranged, the transition section 4 is located close to the arm root, which is similar to a single-arm structure. When multiple lower segment standard sections 3 are arranged, the transition section 4 is located close to the arm end, which is similar to a double-arm structure.
[0030] The transition section 4 is a two-piece structure arranged symmetrically, including an upper cross bar 401, a lower cross bar 402, an outer chord 403, an inner chord 404, a connecting rod 405, a web 406, an upper joint 407 and a lower joint 408. In a single-piece structure, the upper joint 407 is welded at the upper end of the upper cross bar 401, the lower joint 408 is welded at the lower end of the lower cross bar 402, the inner chord 404 and the outer chord 403 are welded between the upper cross bar 401 and the lower cross bar 402 respectively, and the upper cross bar 401 and the lower cross bar 402 between the inner chords 404 are welded by the connecting rod 405. The upper end of the transition section 4 is connected with the upper segment standard section 5, and the lower end is connected with two lower segment standard sections 3. The upper and lower two-piece structures of the transition section 4 are welded by a plurality of web roots 406. The transition section structure is arranged symmetrically, compactly and reasonably in force transmission. The transition section 4 is connected with the upper segment standard section 5 through the upper joint 407, and is connected with two lower segment standard sections 3 through the lower joint 408 respectively.
[0031] The upper cross bar 401 and the lower cross bar 402 are internally provided with stiffening ribs 409. The stiffening ribs 409 are stiffening round plates or stiffening rectangular plates. The stiffening ribs 409 are arranged in a transverse or longitudinal manner. Under the load action of the upper joint and the lower joint, the upper cross bar and the lower cross bar of the transition section bear larger local internal forces and stresses. The stiffening ribs can be used to strengthen the upper cross bar and the lower cross bar to prevent strength damage and local instability.
[0032] The upper cross bar 401, the lower cross bar 402, the outer chord 403, the inner chord 404, the connecting rod 405 and the web 406 all adopt a circular tube section. The transition section structure is arranged symmetrically, compactly and reasonably in force transmission.
[0033] The upper segment standard section 5 includes an upper segment standard section structure 501 and an upper segment standard section joint 502. The upper segment standard section structure 501 is a square column structure as a whole, and eight groups of upper segment standard section joints 502 are welded at both ends of the upper segment standard section structure 501 respectively. The upper segment standard section 5 is connected with the transition section 4 through the upper segment standard section joint 502 by means of a bolt group at the bottom, and is connected with the head section 6 through the upper segment standard section joint 502 by means of a bolt group at the upper end.
[0034] The head section 6 comprises a head section structure 601, a head section joint 602 and a head beam 603, the head section structure 601 is a square column structure as a whole, the head beam 603 is welded on the top of the head section structure 601, the head section joint 602 is welded on the lower part of the head section structure 601, and the head section 6 is connected with the upper standard section 5 by the head section joint 602 through a bolt group.
[0035] The utility model also provides a mast crane, the mast crane is equipped with crane single double combination arm support structure above described.
[0036] The utility model discloses a combined arm support structure, which comprises a single-arm upper section and a double-arm lower section, wherein the single-arm upper section is connected to the double-arm lower section through a transition section. When the position of the transition section is close to the arm root, the structure is close to a single-arm structure, and when the position of the transition section is close to the arm end, the structure is close to a double-arm structure. Therefore, the single-double-arm structure is a structure between a single arm and a double arm. The transition point of the arm support is selected at a golden section point, the overall structure is beautiful, and the force is reasonable. Compared with a single-arm arm support, the single-double-arm structure has better lateral stability, and compared with a double-arm arm support, the single-double-arm structure has lighter weight.
[0037] The above-mentioned embodiments of the utility model are only examples, not the only ones, and all changes within the scope of the utility model or equivalent to the scope of the utility model are covered by the utility model.
Claims
1. A crane single / double combined boom structure, characterized in that: It includes a lower boom section, an upper boom section and a transition section (4). The lower boom section is a double boom structure with symmetrical sides, and its upper section is a single boom structure. The lower boom section is composed of a root section (1), a root section (2) and a lower standard section (3) connected in sequence. The upper boom section is composed of an upper standard section (5) and a head section (6) connected in sequence. The upper boom section and the lower boom section are connected by a transition section (4).
2. The crane single / double combined boom structure according to claim 1, characterized in that: The root section (1) includes a root crossbeam (101), a root hinge (102), and a root flange (103). The root hinge (102) and the root flange (103) are respectively welded to both sides of the root crossbeam (101). The root section (1) is connected to the root section (2) by a group of bolts through the root flange (103). The boom structure is fixed to the base through the root crossbeam (101) and the root hinge (102).
3. The crane single / double combined boom structure according to claim 1, characterized in that: The root section (2) includes a root section structure (201), a root section flange (202), and a root section connector (203). The root section structure (201) is a square column-type structure. The root section flange (202) is welded to the bottom of the root section structure (201), and four root section connectors (203) are welded to the upper end of the root section structure (201). The root section (2) is connected to the lower standard section (3) by bolt groups through the root section connectors (203) and to the root (1) by bolt groups through the root section flanges (202).
4. The crane single / double combined boom structure according to claim 1, characterized in that: The lower standard section (3) includes a lower standard section structure (301) and a lower standard section joint (302). The lower standard section structure (301) is a square column structure. Eight sets of lower standard section joints (302) are welded to both ends of the lower standard section structure (301). The bottom of the lower standard section (3) is connected to the root section (2) by bolts through the lower standard section joints (302), and its upper end is connected to the transition section (4) or the lower standard section (3) by bolts through the lower standard section joints (302).
5. The crane single / double combined boom structure according to claim 1, characterized in that: The transition section (4) is a two-piece structure arranged symmetrically, including an upper crossbar (401), a lower crossbar (402), an outer chord (403), an inner chord (404), a connecting rod (405), a web member (406), an upper connector (407), and a lower connector (408). The upper connector (407) is welded to the upper end of the upper crossbar (401), and the lower connector (408) is welded to the lower end of the lower crossbar (402). The inner chord (404) and the lower crossbar (402) are welded to each other respectively. The upper crossbar (401) and lower crossbar (402) between the outer chord (403) and inner chord (404) are welded together by connecting rods (405); the upper end of the transition section (4) is connected to the upper standard section (5) and the lower end is connected to the two lower standard sections (3); the upper and lower structures of the transition section (4) are welded together by several web members (406); the transition section (4) is connected to the upper standard section (5) through the upper joint (407) and to the two lower standard sections (3) through the lower joint (408).
6. The crane single / double combined boom structure according to claim 5, characterized in that: The upper crossbar (401) and lower crossbar (402) are provided with stiffening ribs (409), which are stiffening circular plates or stiffening rectangular plates, and the stiffening ribs (409) are arranged in a horizontal or vertical manner.
7. The crane single / double combined boom structure according to claim 5, characterized in that: The upper crossbar (401), lower crossbar (402), outer chord (403), inner chord (404), connecting rod (405), and web member (406) are all made of round tubes.
8. The crane single / double combined boom structure according to claim 1, characterized in that: The upper standard section (5) includes an upper standard section structure (501) and an upper standard section joint (502). The upper standard section structure (501) is a square column structure. Eight sets of upper standard section joints (502) are welded to both ends of the upper standard section structure (501). The bottom of the upper standard section (5) is connected to the transition section (4) by bolts through the upper standard section joints (502), and its upper end is connected to the head section (6) by bolts through the upper standard section joints (502).
9. The crane single / double combined boom structure according to claim 1, characterized in that: The head section (6) includes a head section structure (601), a head section connector (602), and a head crossbeam (603). The head section structure (601) is a square column structure. The head crossbeam (603) is welded to the top of the head section structure (601). The head section connector (602) is welded to the lower part of the head section structure (601). The head section (6) is connected to the upper standard section (5) by a group of bolts through the head section connector (602).
10. A mast crane, characterized in that: The crane has a single or double combined boom structure as described in any one of claims 1-9.