Supporting rope fixing device of tower crane

Abstract

The utility model relates to the technical field of tower cranes, in particular to a fixed supporting rope device of a tower crane, which comprises an L-shaped bracket formed by fixedly connecting an upper supporting rod and a lower supporting rod, the end part of the upper supporting rod is rotatably fixed in the fixed frame, and the end part of the fixed frame is fixedly connected with the flange through a rib plate; two lug plates are fixedly arranged on the side, close to the cargo boom, of the upper supporting rod, and a roller is fixedly connected between the two lug plates; a rotatable carrier roller is arranged at the end part of the lower supporting rod; and a reset device is arranged on the upper supporting rod. According to the utility model, the overall stability of the tower crane can be effectively improved, swing or inclination of the lifting steel wire rope and the variable-amplitude steel wire rope caused by wind power or load change can be reduced, and rope interference is reduced, so that the safety of a construction site is improved, and the personal safety of workers is protected; and moreover, the overhaul and maintenance process of the tower crane is simplified, the downtime is shortened, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tower crane technical field, especially a kind of tower crane fixed rope supporting device. BACKGROUND

[0002] Tower crane is composed of underframe, tower body, slewing support, tower top, balance arm, hoist arm, driver's room, ladder and platform according to structure;According to mechanism, it is composed of hoisting mechanism, slewing mechanism, luffing mechanism, hydraulic mechanism and other parts, and luffing mechanism includes luffing motor, speed reducer, luffing drum and luffing trolley etc., hoisting mechanism includes hoisting wire rope etc., and hoist arm is provided with track along its radial two sides.

[0003] The length of hoist arm of some large tower crane has reached 80 meters, and the maximum lifting capacity is also increasing, and the diameter of hoisting wire rope is also thickened accordingly. Thus, it will inevitably cause the problem of excessive sagging deflection of hoisting wire rope when the tower crane is unloaded, and in large construction engineering, multiple large tower cranes and other construction equipment often work simultaneously, and the working range of each other is staggered and overlapped. Under this condition, the excessive sagging deflection of steel wire rope not only brings danger to building construction, but also increases the time of collecting and releasing rope when lifting, reduces the construction efficiency of tower crane, and the bending and torsion caused by sagging will accelerate the wear of steel wire rope and shorten its service life. At the same time, the excessive sagging deflection of steel wire rope will directly affect the stability and safety of lifting operation, cause the swing of lifting goods, and it is difficult to accurately control. CONTENT OF UTILITY MODEL

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a rope supporting device capable of being fixed on hoist arm, so as to improve the safety, stability and operation convenience of crane in hoisting operation.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a kind of tower crane fixed rope supporting device, comprising: upper support and lower support;Upper support and lower support are fixedly connected to form L-shaped support;

[0006] The end of the upper support is rotatably fixed in the fixed frame, and the end of the fixed frame is fixedly connected with the flange through the rib plate;Two ear plates are fixedly arranged on one side of the upper support close to the hoist arm, and a roller is fixedly connected between the two ear plates;The end of the lower support is provided with a rotatable supporting roller;

[0007] The upper support is provided with a reset device;

[0008] Further, the reset device comprises: a support frame rotatably arranged on the upper support rod, the top of the support frame is fixedly connected with the fixed frame through a connecting plate, two shafts are rotatably arranged in the support frame and away from one side of the jib, the top of each of the two shafts is higher than the top plate of the support frame, and a first lever is arranged on the top of each of the two shafts and perpendicular to the axis of the shaft, the part of each of the two shafts that is higher than the top plate of the support frame is sleeved with a torsion spring, one free end of the torsion spring is fixedly connected with the first lever, and the other free end is fixedly connected with the support frame;

[0009] A second lever is fixedly arranged on the upper support rod and perpendicular to the axis of the upper support rod, and the end of the second lever is provided with a stop lever inserted between the two first levers;

[0010] Further, a baffle is arranged between the two first levers and fixed on the support frame;

[0011] Further, the axes of the two shafts are parallel to the upper support rod and symmetrical relative to the upper support rod;

[0012] Further, the materials of the upper support rod and the lower support rod are steel;

[0013] Further, a stand is further arranged on the lower chord of the jib and fixedly connected with the flange.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. Stability is enhanced: the device can effectively improve the overall stability of the tower crane, reduce the swinging or tilting of the hoisting wire rope and the luffing wire rope caused by wind or load changes, improve the working precision and reduce the sagging amplitude of the rope to improve the stability.

[0016] 2. Safety is improved: the device can effectively reduce the sagging amplitude of the hoisting wire rope and the luffing wire rope, reduce the interference of the rope, thereby improving the safety of the construction site and protecting the personal safety of workers.

[0017] 4. Maintenance is convenient: the device helps to simplify the maintenance and repair process of the tower crane, reduces downtime and improves work efficiency.

[0018] 5. Extreme weather is coped with: in extreme weather conditions, such as strong wind or heavy rain, reducing the swinging of the rope makes the tower crane run more stably and improves the working precision.

[0019] 6. Cost-effectiveness: the device can reduce the loss and maintenance cost caused by accidents and has good economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of this utility model when assembled with a crane boom;

[0022] In the diagram: 1. Upper support rod; 2. Lower support rod; 3. Fixing frame; 4. Rib plate; 5. Flange; 6. Idler roller; 7. Lower chord; 8. Ear plate; 9. Roller; 10. Support frame; 11. Connecting plate; 12. Spindle; 13. Torsion spring; 14. First lever; 15. Stop lever; 16. Second lever; 17. Baffle plate; 18. Column. Detailed Implementation

[0023] The technical solution adopted by this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1 As shown, this utility model provides a tower crane fixed rope support device, including an L-shaped bracket composed of an upper support rod 1 and a lower support rod 2. The upper support rod 1 is arranged longitudinally, that is, perpendicular to the crane arm, and the lower support rod 2 is arranged laterally, that is, parallel to the crane arm. In this embodiment, the upper support rod 1 and the lower support rod 2 are made of high-strength steel and can be fixed to form an L-shaped bracket by welding.

[0025] The end of the upper support rod 1 is rotatably fixed in the fixed frame 3. The end of the fixed frame 3 is fixedly connected to the flange 5 through the rib plate 4. The end of the lower support rod 2 is provided with a roller 6 for supporting the hoisting wire rope and the luffing wire rope. The roller 6 is rotatably set at the end of the lower support rod 2.

[0026] Specifically, such as Figure 2 As shown, this device is fixedly connected to the lower chord 7 of the boom via flange 5 and bolts for easy disassembly and to improve the overall practicality of the device. Specifically, a column 18 parallel to the upper support rod 1 can be set on the lower chord 7 of the boom, and the flange 5 and the column 18 can be fixed by bolts. Alternatively, the flange 5 can be directly fixed to the lower chord 7. The distance between the upper support rod 1 and the boom can be controlled by adjusting the length of the rib plate 4, so that the lower support rod 2 can extend under the boom and support the hoisting wire rope and the luffing wire rope through the idler roller 6 at its end.

[0027] Meanwhile, two ear plates 8 are fixedly installed on the side of the upper support rod 1 near the boom. The two ear plates 8 are connected to the drum 9 by bolts. When the luffing trolley passes by, the luffing trolley hits the drum 9, causing the upper support rod 1 to rotate within the fixed frame 3. While the upper support rod 1 rotates, it also causes the lower support rod 2 to rotate around the upper support rod 1 at a certain angle, so that the lifting wire rope at the bottom of the luffing trolley will not interfere with the lower support rod 2, ensuring that the luffing trolley passes smoothly.

[0028] Further, the upper supporting rod 1 is further provided with a reset device, when the luffing trolley passes, under the action of the reset device, the upper supporting rod 1 can be driven to rotate reversely and reset, so that the lower supporting rod 2 restores the supporting effect on the lifting steel wire rope and the luffing steel wire rope, which comprises a supporting frame 10 rotatably arranged on the upper supporting rod 1, the supporting frame 10 is located below the fixed frame 3, the top of the supporting frame 10 is connected and fixed with the fixed frame 3 by a connecting plate 11 in a welding manner, so that the upper supporting rod 1 can rotate relative to the supporting frame 10, two shafts 12 are rotatably arranged on one side of the supporting frame 10 away from the crane arm, the axis lines of the two shafts 12 are parallel to the upper supporting rod 1 and are symmetrically arranged relative to the upper supporting rod 1;

[0029] The top end of the shaft 12 is provided with a first lever 14 perpendicular to the axis line thereof, the part of the shaft 12 protruding from the top plate of the supporting frame 10 is sleeved with a torsion spring 13, one free end of the torsion spring 13 is fixedly connected with the first lever 14, and the other free end of the torsion spring 13 is fixedly connected with the supporting frame 10.

[0030] The upper supporting rod 1 is fixedly provided with a second lever 16 perpendicular to the axis line thereof, the end of the second lever 16 is provided with a stop lever 15, and the stop lever 15 is longitudinally arranged and inserted between the two first levers 14.

[0031] Specifically, in the embodiment, when the luffing trolley hits the roller 9, the upper supporting rod 1 is rotated, and the second lever 16 is also rotated, the stop lever 15 of the second lever 16 is longitudinally arranged, the stop lever 15 can be driven to rotate the first lever 14 and the shaft 12 relative to the supporting frame 10 from between the two first levers 14, and the free end of the torsion spring 13 is compressed, when the luffing trolley passes, the stop lever 15 is reversely driven by the first lever 14 through the reaction of the compressed torsion spring 13, so as to reset the upper supporting rod 1.

[0032] Further, the two first levers 14 are further provided with a baffle 17 fixed on the supporting frame 10, for preventing the shaft 12 from resetting too much.

[0033] Principle of the utility model:

[0034] Firstly, the device can be arranged as shown in the figure, Figure 2The roller 6 shown installed on the lower chord 7, the end of the lower strut 2 is used to hold the lifting wire rope and the luffing wire rope, when the luffing trolley passes through the lower chord 7 of the crane (from the arm root to the arm end), it will collide with the roller 9 on the upper strut 1 to push the upper strut 1 to rotate, and the rotation of the upper strut 1 will make the second lever 16 rotate with the stop lever 15 to push the first lever 14 and make the torsion spring 13 obtain the torsion force, after the luffing trolley passes, the first lever 14 is reset due to the torsion force of the torsion spring 13, and the stop lever 15 is pushed to drive the second lever 16 to make the lower strut 2 reset to hold the wire rope again, and the working principle is the same when the luffing trolley returns (from the arm head to the arm root).

[0035] The preferred embodiments of the present application are described above, but are not intended to limit the present application, and the present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tower crane fixed rope support device, characterized in that, The utility model relates to a kind of crane, including: Upper support rod (1); With the upper support rod (1) fixed connection lower support rod (2); The upper support rod (1) and lower support rod (2) form L-shaped support; The end of the upper support rod (1) is rotatably fixed in fixed frame (3), and the end of the fixed frame (3) is fixedly connected with flange (5) by rib plate (4); Two ear plates (8) are fixedly arranged on the upper support rod (1) side close to crane arm, and drum (9) is fixedly connected between two ear plates (8); The end of the lower support rod (2) is provided with rotatable carrier roller (6); The upper support rod (1) is provided with reset device.

2. A tower crane fixed rope support arrangement according to claim 1, characterised in that, The reset device includes: rotatably arranged support frame (10) on the upper support rod (1), the top of the support frame (10) is fixedly connected with fixed frame (3) by connecting plate (11), two mandrels (12) are rotatably arranged in the support frame (10) and away from crane arm side, the top of two mandrels (12) is all higher than the top plate of support frame (10), and is provided with first lever (14) perpendicular to its axis, the part of two mandrels (12) higher than the top plate of support frame (10) is all sheathed torsion spring (13), one free end of the torsion spring (13) is fixedly connected with first lever (14), and another free end is fixedly connected with support frame (10); The upper support rod (1) is fixedly provided with second lever (16) perpendicular to its axis, and the end of the second lever (16) is provided with stop lever (15) inserted between two first levers (14).

3. A tower crane fixed rope support arrangement according to claim 2, characterised in that, Stop plate (17) is arranged between two first levers (14) and fixed on support frame (10).

4. A tower crane fixed rope support arrangement according to claim 2, characterised in that, The axis of two mandrels (12) is parallel with the upper support rod (1), and is symmetrically arranged relative to the upper support rod (1).

5. Tower crane fixed rope support device according to claim 1, characterized in that The material of the upper support rod (1) and lower support rod (2) is steel.

6. Tower crane fixed rope support device according to claim 1, characterized in that It also includes stand (18) fixed on lower chord (7) of crane arm, and the stand (18) is fixedly connected with flange (5).

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