Mast crane boom head multi-web box-shaped structure and mast crane

Abstract

The utility model discloses a mast crane boom head multi-web box-shaped structure and a mast crane, the multi-web box-shaped structure comprises a main arm, an auxiliary arm, a head cross beam, a pin shaft, a lifting fixed pulley block, a lifting movable pulley block and a variable amplitude pull plate, the head cross beam is formed by welding an upper wing plate, a lower wing plate and a plurality of groups of webs; the head beam is integrally welded to the head of the main arm, and the auxiliary arm is fixed to the head beam through a pin shaft. The lifting fixed pulley block is directly arranged on the head cross beam of the boom, and the variable-amplitude pull plate is mounted on the head cross beam. The variable-amplitude pulling plate and the auxiliary arm share the cross beam web at the head of the main arm, so that the structure is compact; the mast crane is not provided with a lifting pull plate and a movable pulley frame, and under the same lifting height, the length of the boom is shorter, and the lifting performance is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of mast crane arm frame head multi-web box shape structure and mast crane, belong to hoisting machinery technical field. BACKGROUND

[0002] The intersection of the vertical line of the hoisted article and the axis of the luffing pull plate is not on the axis of the arm frame during the swing luffing process of the arm frame of the mast crane, resulting in bending of the arm frame structure, and the bending moment decreases linearly from the arm frame head to the arm frame root. To reduce the bending moment, the spacing between the two hinge points of the arm frame head beam (the hinge points of the arm frame head beam with the hoisting pull plate and the movable pulley carrier, and the hinge points of the arm frame head beam with the luffing pull plate) is reduced, i.e., the arm frame head structure is reduced. After the hoisting fixed pulley set is fixed on the arm frame head, the hoisting rope interferes with the arm frame structure during the swing luffing process of the arm frame, which causes the problem that the hoisting fixed pulley set cannot be arranged on the arm frame head and must be set up the hoisting pull plate and movable pulley carrier 10 for transition (as shown in Figure 1 Due to the increase in the length of the hoisting pull plate and movable pulley carrier, the height of the hoisting fixed pulley set is reduced, which in turn reduces the effective hoisting height of the heavy object, and the arm length must be increased to compensate for the height difference, which increases the length of the arm frame, increases the hoisting pull plate and movable pulley carrier, and reduces the effective hoisting height of the heavy object, i.e., reduces the hoisting height of the crane. SUMMARY

[0003] The utility model solves the technical problems of the existing arm frame structure, the arrangement of the hoisting pull plate and movable pulley carrier, and the hoisting fixed pulley set, provides a kind of mast crane arm frame head multi-web box shape structure, cancels hoisting pull plate and movable pulley carrier, and makes hoisting fixed pulley set directly arranged on the arm frame head crossbeam.

[0004] To solve this technical problem, the utility model provides a kind of mast crane arm frame head multi-web box shape structure, including main arm, vice arm, head crossbeam, pin shaft, hoisting fixed pulley set, hoisting movable pulley set and luffing pull plate, and the head crossbeam is welded by upper wing plate, lower wing plate and multiple groups of web plate;Head crossbeam is integrally welded on the head of main arm, and vice arm is fixed on head crossbeam by pin shaft;Hoisting fixed pulley set is directly arranged on the arm frame head crossbeam, and luffing pull plate is installed on head crossbeam.

[0005] The vice arm adopts plate-tube hybrid structure, including vice arm pull plate, vice arm chord and vice arm joint, the vice arm pull plate is bent steel plate, the vice arm chord is straight pipe, and four vice arm joints are welded on the vice arm chord and vice arm pull plate respectively.

[0006] The upper wing plate is provided with a plurality of slots corresponding to the number of webs, and each web is provided with a boss, when the head beam is combined and welded, the boss on the web is inserted through the slot on the web and welded on the outside of the upper wing plate.

[0007] The web is provided with a hoisting shaft hole, and a hoisting trolley is installed on the head beam through the hoisting shaft hole.

[0008] The web is provided with an amplitude shaft hole, and an amplitude pull plate is installed on the head beam through the amplitude shaft hole.

[0009] The web is provided with a sub-arm shaft hole, and a sub-arm is fixed on the head beam through the sub-arm shaft hole by using a pin shaft.

[0010] The head of the main arm is provided with a plurality of stiffening ribs, which are respectively welded between the upper wing plate, the lower wing plate and the web, so that the upper wing plate, the lower wing plate and the web form a sealed box structure.

[0011] The utility model also provides a mast crane, the mast crane is equipped with the multi-web box structure.

[0012] Beneficial effects: the utility model discloses a plate pipe hybrid structure is used to the sub-arm, reduces the manufacturing difficulty, and the stiffening rib arrangement of the head of the main arm makes the hoisting trolley, the amplitude pull plate and the sub-arm share the beam web of the head of the main arm, and the structure is compact, compared with prior art, does not set up hoisting pull plate and movable pulley frame, and the length of the arm support is shorter under the same hoisting height, and the hoisting performance is better. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the schematic diagram of the traditional arm support head structure;

[0014] Figure 2 It is the schematic diagram of the multi-web structure of the arm support head of the utility model;

[0015] Figure 3 It is the schematic diagram of the structure of the sub-arm of the utility model;

[0016] Figure 4 It is the schematic diagram of the structure of the head beam of the utility model;

[0017] Figure 5 It is the schematic diagram of the structure of the upper wing plate of the beam of the utility model;

[0018] Figure 6 It is the schematic diagram of the structure of the web of the beam of the utility model;

[0019] Figure 7 It is the schematic diagram of the structure of the arm support head of the utility model;

[0020] Figure 8The utility model discloses an assembly diagram of the head of the boom.

[0021] In the drawing: 1, main arm; 2, auxiliary arm; 3, head beam; 4, pin shaft; 5, hoisting fixed pulley block; 6, hoisting movable pulley block; 7, luffing pull plate; 8, hoisting rope; 10, hoisting pull plate and movable pulley frame; 201, auxiliary arm pull plate; 202, auxiliary arm chord; 203, auxiliary arm joint; 301, upper wing plate; 302, lower wing plate; 303, web plate; 304, auxiliary arm shaft hole; 305, slot hole; 306, hoisting shaft hole; 307, luffing shaft hole; 308, boss; 309, stiffener. DETAILED DESCRIPTION

[0022] The utility model will be described in detail below in combination with the drawings and examples.

[0023] As Figures 2-8 The utility model discloses a mast crane boom head multi-web box shape structure, including main arm 1, auxiliary arm 2, head beam 3, pin shaft 4, hoisting fixed pulley block 5, hoisting movable pulley block 6 and luffing pull plate 7, head beam 3 is by upper wing plate 301, lower wing plate 302 and multi -group web plate 303 weld together, and head beam 3 is integrally welded in the head of main arm 1, and auxiliary arm 2 is fixed on head beam 3 through pin shaft 4, and hoisting fixed pulley block 5 is directly arranged on boom head beam 3, and luffing pull plate 7 is installed on head beam 3.

[0024] Auxiliary arm 2 adopts the structure of plate pipe mixture, including auxiliary arm pull plate 201, auxiliary arm chord 202 and auxiliary arm joint 203, auxiliary arm pull plate 201 is the steel sheet of bending, and auxiliary arm chord 202 is straight pipe, and four auxiliary arm joints 203 are welded on auxiliary arm chord 202 and auxiliary arm pull plate 201 respectively, and auxiliary arm 2 does not have the pipe fitting of spatially inclined arrangement, and the manufacturing welding piece process is simple, and the manufacturing difficulty is reduced.

[0025] Upper wing plate 301 is provided with the slot hole 305 corresponding with the number of web plate 303, and each web plate 303 is provided with the boss 308, when head beam 3 is combined and welded, the boss 308 on web plate 303 inserts and passes through the slot hole 305 on web plate 303, and is welded on the outside of upper wing plate 301, solve the problem that multiple web plate 303 can not be welded.

[0026] Web plate 303 is provided with hoisting shaft hole 306, and hoisting fixed pulley block 5 is directly installed on head beam 3 through hoisting shaft hole 306, need not adopt hoisting pull plate and movable pulley frame 10, therefore the weight of hoisting pull plate and movable pulley frame is not had, and the height generated due to hoisting pull plate and movable pulley frame is not had simultaneously, correspondingly improve the hoisting height of crane.

[0027] The web plate 303 is provided with a luffing shaft hole 307, and the luffing pull plate 7 is installed on the head beam 3 through the luffing shaft hole 307, and the luffing pull plate 7 provides luffing power for the head beam 3 and the main arm 1, drives the main arm 1 to produce luffing swing, and realizes the amplitude change of the crane.

[0028] The web plate 303 is provided with a sub-arm shaft hole 304, and the sub-arm 2 is fixed on the head beam 3 through the sub-arm shaft hole 304 by using a pin shaft 4, so that the head beam 3 can be connected with the hoisting trolley group 5, the luffing pull plate 7 and the sub-arm 2 at the same time, and therefore the structure of the head beam 3 is more compact.

[0029] The head of the main arm 1 is provided with a plurality of stiffening ribs 309 which are welded between the upper wing plate 301, the lower wing plate 302 and the web plate 303, so that the upper wing plate 301, the lower wing plate 302 and the web plate 303 form a sealed box structure, the strength of the head beam 3 is enhanced, and the local instability of the head beam 3 is prevented.

[0030] The utility model discloses a sub-arm adopts the plate pipe hybrid structure, has reduced the manufacturing difficulty, and the main arm head stiffening rib arrangement makes hoisting trolley group, luffing pull plate and sub-arm share the beam web plate of main arm head, and the structure is compact, the utility model discloses compared with prior art does not set up hoisting pull plate and movable pulley frame, and under the same hoisting height, the length of the arm support is shorter, and the hoisting performance is better.

[0031] The utility model also provides a kind of mast crane, and the mast crane is equipped with the multi-web plate box structure described above.

[0032] The utility model discloses an arm support head adopts multi-web plate box structure, and the web plate of head beam 3 is provided with hoisting shaft hole 306 and luffing shaft hole 307, and the width of head beam is increased, i.e. the spacing of hoisting shaft hole and luffing shaft hole is increased, and the structure does not set up hoisting pull plate and movable pulley frame, under the same hoisting height, the length of the arm support is shorter, and the hoisting performance is better;Sub-arm 2 adopts plate pipe hybrid structure, and manufacturing difficulty is reduced, and sub-arm 2 joint is connected by means of beam web plate, which not only ensures the effective fixation of hoisting trolley group 5, but also makes the structure stress more reasonable, avoids the bending of main arm head beam 3 under the action of hoisting load;Hoisting trolley group 5, luffing pull plate 7 and sub-arm 2 share the beam web plate of main arm head, and the structure is compact;The structure of main arm head beam 3 adopts the mode of boss overhanging, solves the process problem that multi-web plate box is difficult to weld, and increases the cross section height of luffing plane main arm head, effectively improves the strength of main arm under dangerous working condition.

[0033] The above implementation solutions of the utility model are only used for illustration, and are not the only ones. 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 multi-web box-shaped structure for the jib head of a mast crane, characterized by: The invention comprises a main arm (1), a jib (2), a head cross beam (3), a pin shaft (4), a lifting fixed pulley group (5), a lifting movable pulley group (6) and a luffing pull plate (7), wherein the head cross beam (3) is welded by an upper wing plate (301), a lower wing plate (302) and a plurality of web plates (303); the head cross beam (3) is integrally welded to the head of the main arm (1), and the jib (2) is fixed to the head cross beam (3) through a pin shaft (4); the lifting fixed pulley group (5) is directly arranged on the jib head cross beam (3), and the luffing pull plate (7) is installed on the head cross beam (3).

2. The multi-web box structure of the mast crane boom head according to claim 1, characterized in that: The jib (2) adopts a plate-tube hybrid structure, comprising a jib pull plate (201), a jib chord (202) and a jib joint (203); the jib pull plate (201) is a bent steel plate, the jib chord (202) is a straight tube, and four groups of jib joints (203) are respectively welded to the jib chord (202) and the jib pull plate (201).

3. The multi-web box structure of the mast crane boom head according to claim 1, characterized in that: The upper wing plate (301) is provided with slots (305) corresponding in number to the web plate (303), and each web plate (303) is provided with a boss (308). When the head cross beam (3) is assembled and welded, the boss (308) on the web plate (303) is inserted into and passes through the slots (305) on the web plate (303) and is welded on the outer side of the upper wing plate (301).

4. The multi-web box structure of the mast crane boom head according to claim 1, characterized in that: A lifting shaft hole (306) is provided on the web (303), and the lifting fixed pulley assembly (5) is installed on the head crossbeam (3) through the lifting shaft hole (306).

5. The multi-web box structure of the mast crane boom head according to claim 1, characterized in that: The web (303) is provided with an amplitude-changing shaft hole (307), and the amplitude-changing pull plate (7) is mounted on the head crossbeam (3) through the amplitude-changing shaft hole (307).

6. The multi-web box structure of the mast crane boom head according to claim 1, characterized in that: A jib shaft hole (304) is provided on the web (303), and the jib (2) is fixed to the head crossbeam (3) via the jib shaft hole (304) using a pin (4).

7. The multi-web box structure at the jib head of a mast crane according to any one of claims 1 to 6, characterized in that: The head of the main arm (1) is provided with a stiffening rib (309), and the stiffening rib (309) is provided with a plurality of pieces, which are respectively welded between the upper wing plate (301), the lower wing plate (302) and the web (303), so that the upper wing plate (301), the lower wing plate (302) and the web (303) form a sealed box structure.

8. A mast crane, characterized in that: A multi-web box structure according to any one of claims 1 to 7 is provided.

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