External rope row telescopic system of movable supporting leg

Abstract

The invention discloses a movable supporting leg external rope row telescopic system which comprises a fixed supporting leg and a movable supporting leg which are connected with each other, a telescopic element and a rope row system are arranged on the outer side of the fixed supporting leg and the outer side of the movable supporting leg, the telescopic element and the rope row system are connected through a support, and the telescopic element and the rope row system drive the movable supporting leg to stretch out and draw back. The telescopic element is installed on the fixed supporting leg through the rear support and the front support. The telescopic elements are externally arranged, so that the problem that telescopic elements such as an oil cylinder cannot be arranged in the box-shaped supporting leg due to small box-shaped supporting leg is solved; and the stroke of the telescopic element is reduced, so that the drooping head quantity after the cylinder rod fully extends is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of wheeled cranes, and particularly to an external rope row telescopic system for movable outriggers. Background Art

[0002] The outrigger rope row telescopic system generally consists of two groups of rope rows and several pulleys to form a pulley block. The extension and retraction of the movable outriggers are respectively realized through the movement of the rope rows, and it is commonly used in outrigger structures with two or more sections. The telescopic elements mainly include hydraulic cylinders, electric cylinders, air cylinders, etc. The outriggers, as the main components of the wheeled crane, are composed of fixed outriggers and movable outriggers. The fixed outriggers are usually welded to the vehicle frame as a whole, and the movable outriggers need to be driven by telescopic elements (such as hydraulic cylinders, etc.) to achieve telescopic movement. During hoisting operations, the telescopic elements push the movable outriggers to extend to a certain length to achieve the purpose of bearing and improving the stability of the hoisted load. In the road driving state, the telescopic elements retract the movable outriggers into the fixed outrigger box to ensure that the vehicle does not exceed the width limit and meet the regulatory requirements.

[0003] In the existing telescopic system for the movable outriggers of wheeled cranes, both the fixed outriggers and the movable outriggers are box-shaped structures, and the movable outriggers are nested inside the fixed outriggers. The cylinder barrel of the telescopic cylinder is fixed on the fixed outrigger, and the cylinder rod of the telescopic cylinder is fixed on the movable outrigger. As the cylinder rod of the telescopic cylinder extends and retracts, the movable outrigger can achieve extension and retraction movements. Existing technologies include "Outrigger Telescopic Device and Construction Machinery", application number 201210546320.8; "An Outrigger Telescopic Mechanism and a Truck Crane with the Same", application number 201610250459.6; "A Double-Stage Telescopic Outrigger", application number 201811404415.X.

[0004] However, the existing telescopic systems for the outriggers of wheeled cranes have the following problems: 1. Due to the overall machine layout, the box-shaped sizes of the movable outriggers of some wheeled cranes are small, and the telescopic elements are still arranged inside the fixed outrigger and the movable outrigger boxes. Due to the narrow space in the outrigger boxes, it is not conducive to the assembly of the telescopic elements and pipeline systems, and it is also not conducive to subsequent maintenance and repair. If an electric cylinder is used as the telescopic element, due to its larger size, it cannot be arranged inside the outrigger box. 2. To meet the requirement of a large outrigger span, the telescopic elements must be lengthened. Since the telescopic elements are relatively long, after the cylinder rod is fully extended, there is an obvious drooping amount downward due to its own weight. In addition, the front end of the cylinder rod of the telescopic element is fixed on the movable outrigger, and the movable outrigger also has a drooping amount after full extension. This undoubtedly increases the degree of downward bending of the telescopic element, and long-term use is likely to cause problems such as bending deformation of the cylinder rod and abnormal telescoping.

[0005] Therefore, it is necessary to specifically develop a new external rope row telescopic system for movable outriggers to overcome the above problems. Summary of the Invention

[0006] Objective of the Invention: Aiming at the deficiencies and defects of the prior art, the present invention provides an external rope arrangement telescopic system for movable outriggers, which externalizes the telescopic element to solve the problem that the box of the outrigger is small and it is impossible to arrange telescopic elements such as oil cylinders inside; reduces the stroke of the telescopic element, effectively reducing the sag amount after the cylinder rod is fully extended.

[0007] Technical Solution: The external rope arrangement telescopic system for movable outriggers of the present invention is characterized in that it includes a fixed outrigger and a movable outrigger which are connected to each other. An expansion element and a rope arrangement system are provided on the outer sides of the fixed outrigger and the movable outrigger. The expansion element and the rope arrangement system are connected by a bracket. The expansion element and the rope arrangement system drive the movable outrigger to expand and contract. The expansion element is installed on the fixed outrigger through a rear bracket and a front bracket.

[0008] Among them, both the fixed outrigger and the movable outrigger are of box-shaped structures; the expansion element is an expansion hydraulic cylinder, an electric cylinder or a cylinder.

[0009] Preferably, the expansion element is an expansion hydraulic cylinder, and the expansion hydraulic cylinder adopts a short cylinder. Under the condition of realizing the same outrigger span, its stroke is smaller than that of the prior art cylinder.

[0010] Among them, the rope arrangement system includes a retracting rope arrangement and an extending rope arrangement which are connected to each other. The retracting rope arrangement is connected to a fixed pulley one, the extending rope arrangement is connected to a fixed pulley two, and the connection part of the retracting rope arrangement and the extending rope arrangement is connected to the expansion element through a movable pulley.

[0011] Among them, the retracting rope arrangement includes a rope head fixing block one, a steel wire rope one and a rope head fixing block one which are connected in sequence; the extending rope arrangement includes a rope head fixing block two, a steel wire rope two and a rope head fixing block two which are connected in sequence.

[0012] Among them, the steel wire rope one of the retracting rope arrangement is led out from the rope head fixing block one, bypasses the movable pulley and the fixed pulley one in sequence, and terminates at the rope head fixing block one; the steel wire rope two of the extending rope arrangement is led out from the rope head fixing block two, bypasses the movable pulley and the fixed pulley two in sequence, and terminates at the rope head fixing block two.

[0013] Among them, both the rear bracket and the front bracket are steel plate welding structures for fixing the expansion element; one end of the rear bracket is fixed on the fixed outrigger through bolts, and the other end is fixed on the tail of the expansion element cylinder barrel; one end of the front bracket is fixed on the fixed outrigger through bolts, and the other end is fixed on the front part of the expansion element cylinder barrel.

[0014] Among them, one end of the bracket is fixed on the front end of the expansion element cylinder rod, and the other end of the bracket is used for assembling the movable pulley. When the expansion element expands and contracts, the movable pulley synchronously expands and contracts.

[0015] During use, it includes the following steps:

[0016] 1) Install the telescopic element on the fixed leg through the rear bracket and the front bracket;

[0017] 2) Install the movable pulley on the front end of the telescopic element cylinder rod through the bracket;

[0018] 3) Installation of the retraction rope row:

[0019] 31) Install the first rope end fixing block on the fixed leg;

[0020] 32) Install the first fixed pulley on the first rope end fixing block;

[0021] 33) Lead out the first steel wire rope of the retraction rope row from the first rope end fixing block, bypass the movable pulley and the first fixed pulley in sequence, and install the first rope end fixing block on the movable leg;

[0022] 4) Installation of the extension rope row:

[0023] 41) Install the second rope end fixing block on the fixed leg;

[0024] 42) Install the second fixed pulley on the second rope end fixing block;

[0025] 43) Lead out the second steel wire rope of the extension rope row from the second rope end fixing block, bypass the movable pulley and the second fixed pulley in sequence, and install the second rope end fixing block on the movable leg.

[0026] Among them, the process of the movable leg extending: The telescopic element cylinder rod extends forward, driving the movable pulley at the front end of the cylinder rod to move in the same direction. The movable pulley drives the extension rope row to rotate clockwise, thereby pulling out the movable leg from the fixed leg; due to the amplification effect of the pulley block, when the telescopic element extends 1 times the stroke, the movable leg can extend 2 times the stroke;

[0027] The process of the movable leg retracting: The telescopic element cylinder rod retracts, driving the movable pulley at the front end of the cylinder rod to move in the same direction. The movable pulley drives the retraction rope row to rotate counterclockwise, thereby pulling the movable leg back into the fixed leg; due to the amplification effect of the pulley block, when the telescopic element retracts 1 times the stroke, the movable leg can retract 2 times the stroke.

[0028] Beneficial effects: Compared with the prior art, the present invention has the following remarkable advantages: The telescopic element of the present invention is externally arranged, which can solve the problem that it is impossible to arrange telescopic elements such as oil cylinders (especially large-sized electric cylinders) inside the leg box due to its small size. At the same time, with the telescopic element externally arranged, it is beneficial to the arrangement of the telescopic element and its pipeline, facilitating assembly and subsequent maintenance. The stroke of the telescopic element of the present invention is reduced, and the full extension length of the cylinder rod is shortened, which can effectively reduce the sag amount after the cylinder rod is fully extended, improving the reliability and service life of the telescopic element. At the same time, by shortening the telescopic element and realizing the same stroke through the amplification of the pulley block, the weight and cost of the telescopic system can be effectively reduced.

[0029] Based on the prior art, the present invention arranges the telescopic element outside the outrigger box, uses a short-stroke telescopic element plus a pulley block structure. When the telescopic element travels one stroke, after being amplified by the pulley block, it becomes two strokes. On the basis of meeting the requirements of the outrigger span, the weight and cost of the telescopic system can be reduced, and the reliability of the telescopic element and the convenience of assembly and maintenance can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 FIG. 6 is a schematic structural diagram of the outrigger telescopic system in the prior art;

[0031] Figure 2 FIG. 10 is a schematic structural diagram of the present invention;

[0032] Figure 3 FIG. 14 is a schematic structural diagram of the present invention after removing the blocked part;

[0033] Figure 4 FIG. 18 is a schematic three-dimensional structural diagram of the present invention;

[0034] Figure 5 FIG. 22 is a schematic structural diagram of the rope arrangement system and the telescopic element of the present invention;

[0035] Figure 6 FIG. 26 is a schematic structural diagram of the retracting rope arrangement of the present invention;

[0036] Figure 7 FIG. 30 is a schematic structural diagram of the extending rope arrangement of the present invention;

[0037] Figure 8 FIG. 34 is a schematic structural diagram of the telescopic element and the bracket of the present invention;

[0038] Figure 9 FIG. 38 is a schematic structural diagram of the outrigger in the fully extended state of the present invention;

[0039] Figure 10 FIG. 42 is a schematic structural diagram of the outrigger in the fully retracted state of the present invention;

[0040] In the figures, 1 is the fixed outrigger; 2 is the movable outrigger; 3 is the telescopic element; 4 is the rope arrangement system; 5 is the rear bracket; 6 is the front bracket; 7 is the bracket; 41 is the retracting rope arrangement; 42 is the extending rope arrangement; 43 is the movable pulley; 44 is the first fixed pulley; 45 is the second fixed pulley; 411 is the first steel wire rope; 412 is the first rope head fixing block; 413 is the first rope head fixing block; 421 is the second steel wire rope; 422 is the second rope head fixing block; 423 is the second rope head fixing block. DETAILED DESCRIPTION OF THE INVENTION

[0041] The technical solution of the present invention will be further described below in conjunction with the drawings and specific embodiments.

[0042] As Figure 2 、 Figure 3 、Figure 4 , the external rope row telescopic system of the movable leg of the present invention includes a fixed leg 1 and a movable leg 2 which are connected to each other. A telescopic element 3 and a rope row system 4 are arranged on the outer sides of the fixed leg 1 and the movable leg 2. The telescopic element 3 and the rope row system 4 are connected by a bracket 7. The telescopic element 3 and the rope row system 4 drive the movable leg 2 to expand and contract. The telescopic element 3 is installed on the fixed leg 1 through a rear bracket 5 and a front bracket 6. Among them, both the fixed leg 1 and the movable leg 2 are box-shaped structures; the telescopic element 3 is a telescopic hydraulic cylinder, an electric cylinder or a cylinder. Preferably, the telescopic element 3 is a telescopic hydraulic cylinder, and the telescopic hydraulic cylinder uses a short cylinder. Under the condition of achieving the same leg span, its stroke is less than that of the existing technology cylinder.

[0043] Such as Figure 5 , Figure 6 , Figure 7 , the rope row system 4 of the present invention includes a retracting rope row 41 and an extending rope row 42 which are connected to each other. The retracting rope row 41 is connected to a fixed pulley 44, and the extending rope row 42 is connected to a fixed pulley 45. The connection part of the retracting rope row 41 and the extending rope row 42 is connected to the telescopic element 3 through a movable pulley 43. Among them, the retracting rope row 41 includes a rope head fixing block 412, a steel wire rope 411 and a rope head fixing block 413 which are connected in sequence; the extending rope row 42 includes a rope head fixing block 422, a steel wire rope 421 and a rope head fixing block 423 which are connected in sequence.

[0044] The steel wire rope 411 of the retracting rope row 41 is led out from the rope head fixing block 412, bypasses the movable pulley 43 and the fixed pulley 44 in sequence, and terminates at the rope head fixing block 413; the steel wire rope 421 of the extending rope row 42 is led out from the rope head fixing block 422, bypasses the movable pulley 43 and the fixed pulley 45 in sequence, and terminates at the rope head fixing block 423.

[0045] Such as Figure 8 , both the rear bracket 5 and the front bracket 6 of the present invention are steel plate welding structures for fixing the telescopic element 3; one end of the rear bracket 5 is fixed on the fixed leg 1 through bolts, and the other end is fixed on the tail of the cylinder barrel of the telescopic element 3; one end of the front bracket 6 is fixed on the fixed leg 1 through bolts, and the other end is fixed on the front part of the cylinder barrel of the telescopic element 3. Among them, one end of the bracket 7 is fixed on the front end of the cylinder rod of the telescopic element 3, and the other end of the bracket 7 is used for assembling the movable pulley 43. When the telescopic element 3 expands and contracts, the movable pulley 43 expands and contracts synchronously.

[0046] When the external rope row telescopic system of the movable leg of the present invention is used, it includes the following steps:

[0047] 1) Install the telescopic element 3 on the fixed leg 1 through the rear bracket 5 and the front bracket 6;

[0048] 2) Install the movable pulley 43 on the front end of the cylinder rod of the telescopic element 3 through the bracket 7;

[0049] 3) Installation of the recovery rope row 41:

[0050] 31) Install the first rope end fixing block 412 on the fixed support leg 1;

[0051] 32) Install the first fixed pulley 44 on the first rope end fixing block 412;

[0052] 33) Lead out the first steel wire rope 411 of the recovery rope row 41 from the first rope end fixing block 412, successively bypass the movable pulley 43 and the first fixed pulley 44, and install the first rope end fixing block 413 on the movable support leg 2;

[0053] 4) Installation of the extension rope row 42:

[0054] 41) Install the second rope end fixing block 422 on the fixed support leg 1;

[0055] 42) Install the second fixed pulley 45 on the second rope end fixing block 422;

[0056] 43) Lead out the second steel wire rope 421 of the extension rope row 42 from the second rope end fixing block 422, successively bypass the movable pulley 43 and the second fixed pulley 45, and install the second rope end fixing block 423 on the movable support leg 2.

[0057] Such as Figure 9 , Figure 10 , in the process of the extension of the movable support leg 2 of the present invention: the cylinder rod of the telescopic element 3 extends forward, driving the movable pulley 43 at the front end of the cylinder rod to move in the same direction. The movable pulley 43 drives the extension rope row 42 to rotate clockwise, thereby pulling out the movable support leg 2 from the fixed support leg 1; due to the amplification effect of the pulley block, when the telescopic element 3 extends by 1 times the stroke, the movable support leg 2 can extend by 2 times the stroke;

[0058] In the process of the retraction of the movable support leg 2: the cylinder rod of the telescopic element 3 retracts, driving the movable pulley 43 at the front end of the cylinder rod to move in the same direction. The movable pulley 43 drives the recovery rope row 41 to rotate counterclockwise, thereby pulling the movable support leg 2 back into the fixed support leg 1; due to the amplification effect of the pulley block, when the telescopic element 3 retracts by 1 times the stroke, the movable support leg 2 can retract by 2 times the stroke.

[0059] Based on the prior art, the present invention arranges the telescopic element outside the leg box type, uses a short-stroke telescopic element plus a pulley block structure. When the telescopic element has a stroke of 1 time, it becomes 2 times the stroke after being amplified by the pulley block. On the basis of meeting the leg span requirements, the weight and cost of the telescopic system can be reduced, and the reliability of the telescopic element and the convenience of assembly and maintenance can be improved.

[0060] The present invention solves the problem that it is impossible to arrange telescopic components such as oil cylinders (especially large-sized electric cylinders) inside the small outrigger box. At the same time, the telescopic components are shortened, and a double-rope row telescopic system composed of pulley blocks is adopted to realize the telescopic movement of the movable outrigger. With a short-stroke telescopic component plus a pulley block structure, the one-fold stroke of the telescopic component becomes a two-fold stroke after being magnified by the pulley block. On the basis of meeting the requirements of the outrigger span, the weight and cost of the telescopic system can be reduced, and the reliability of the telescopic component and the convenience of assembly, maintenance can be improved.

Claims

1. The movable outrigger external rope telescopic system is characterized by: The invention comprises a fixed leg (1) and a movable leg (2) which are connected to each other. A telescopic element (3) and a rope system (4) are arranged on the outer sides of the fixed leg (1) and the movable leg (2). The telescopic element (3) and the rope system (4) are connected via a bracket (7). The telescopic element (3) and the rope system (4) drive the movable leg (2) to telescope. The telescopic element (3) is mounted on the fixed leg (1) via a rear bracket (5) and a front bracket (6).

2. The movable leg external rope row telescopic system according to claim 1, characterized in that: The fixed legs (1) and the movable legs (2) are both box-type structures; the telescopic element (3) is a telescopic hydraulic cylinder, an electric cylinder or a pneumatic cylinder.

3. The movable leg external rope row telescopic system according to claim 1, characterized in that: The telescopic element (3) is a telescopic hydraulic cylinder, and the telescopic hydraulic cylinder adopts a short cylinder.

4. The movable leg external rope row telescopic system according to claim 1, characterized in that: The rope row system (4) comprises a recovery rope row (41) and an extension rope row (42) which are connected to each other. The recovery rope row (41) is connected to a fixed pulley 1 (44), and the extension rope row (42) is connected to a fixed pulley 2 (45). The connection between the recovery rope row (41) and the extension rope row (42) is connected to the telescopic element (3) via a movable pulley (43).

5. The movable leg external rope row telescopic system according to claim 4, characterized in that: The recovery rope row (41) comprises a rope end fixing block 1 (412), a steel wire rope 1 (411) and a rope end fixing block 1 (413) which are connected in sequence; the extension rope row (42) comprises a rope end fixing block 2 (422), a steel wire rope 2 (421) and a rope end fixing block 2 (423) which are connected in sequence.

6. The movable leg external rope row telescopic system according to claim 5, characterized in that: The steel wire rope 1 (411) of the recovery rope row (41) is led out from the rope end fixing block 1 (412), passes through the movable pulley (43) and the fixed pulley 1 (44) in sequence, and ends at the rope end fixing block 1 (413); the steel wire rope 2 (421) of the extended rope row (42) is led out from the rope end fixing block 2 (422), passes through the movable pulley (43) and the fixed pulley 2 (45) in sequence, and ends at the rope end fixing block 2 (423).

7. The movable leg external rope row telescopic system according to claim 1, characterized in that: The rear bracket (5) and the front bracket (6) are both steel plate welded structures used to fix the telescopic element (3); one end of the rear bracket (5) is fixed to the fixed leg (1) by bolts, and the other end is fixed to the tail of the cylinder of the telescopic element (3); one end of the front bracket (6) is fixed to the fixed leg (1) by bolts, and the other end is fixed to the front of the cylinder of the telescopic element (3).

8. The movable leg external rope row telescopic system according to claim 1, characterized in that: One end of the bracket (7) is fixed to the front end of the cylinder rod of the telescopic element (3), and the other end of the bracket (7) is used to assemble a movable pulley (43). When the telescopic element (3) is extended or retracted, the movable pulley (43) is also extended or retracted synchronously.

9. The movable leg external rope row telescopic system according to any one of claims 1 to 8, characterized in that: When used, the following steps are included: 1) Installing the telescopic element (3) on the fixed leg (1) through the rear bracket (5) and the front bracket (6); 2) installing the movable pulley (43) at the front end of the cylinder rod of the telescopic element (3) through the bracket (7); 3) Installation of the recovery rope row (41): 31) Install the rope end fixing block 1 (412) on the fixed support leg (1); 32) Installing the fixed pulley 1 (44) on the rope end fixing block 1 (412); 33) Leading the steel wire rope 1 (411) of the recovery rope row (41) from the rope end fixing block 1 (412), passing through the movable pulley (43) and the fixed pulley 1 (44) in sequence, and installing the rope end fixing block 1 (413) on the movable support leg (2); 4) Installation of the extended rope row (42): 41) Install the rope end fixing block 2 (422) on the fixed support leg (1); 42) Install the fixed pulley 2 (45) on the rope end fixing block 2 (422); 43) The steel wire rope 2 (421) extending out of the rope row (42) is led out from the rope end fixing block 2 (422), passed around the movable pulley (43) and the fixed pulley 2 (45) in sequence, and the rope end fixing block 2 (423) is installed on the movable support leg (2).

10. The movable leg external rope row telescopic system according to claim 9, characterized in that: The process of extending the movable leg (2) is as follows: the cylinder rod of the telescopic element (3) extends forward, driving the movable pulley (43) at the front end of the cylinder rod to move in the same direction, and the movable pulley (43) drives the extension rope row (42) to move clockwise, thereby pulling the movable leg (2) out of the fixed leg (1); due to the amplification effect of the pulley block, the telescopic element (3) extends 1 times the stroke, and the movable leg (2) can extend 2 times the stroke; The retraction process of the movable leg (2) is as follows: the cylinder rod of the telescopic element (3) retracts, driving the movable pulley (43) at the front end of the cylinder rod to move in the same direction, and the movable pulley (43) drives the recovery rope row (41) to move counterclockwise, thereby pulling the movable leg (2) back into the fixed leg (1); due to the amplification effect of the pulley group, the telescopic element (3) retracts 1 times the stroke, and the movable leg (2) can retract 2 times the stroke.

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