Device for preventing steel wire rope of pulley block of tower crane from falling off

Abstract

The utility model discloses an anti-falling device for a pulley block steel wire rope of a tower crane, and relates to the technical field of accessory devices of tower cranes. The anti-falling device comprises a U-shaped frame, and an anti-falling mechanism is arranged on the U-shaped frame. The anti-falling mechanism comprises two sets of longitudinal anti-falling assemblies, and each set of longitudinal anti-falling assemblies is composed of two fixing plates. According to the tower crane pulley block steel wire rope anti-disengaging device, a fixing plate in a longitudinal anti-disengaging assembly is subjected to the pulling force effect of a first spring, the fixing plate is tightly attached to the end face of a first fixing base all the time, the position of a corresponding first sliding rod does not change, and it is guaranteed that a first limiting roller does not loosen between the first sliding rod and a first shaft base. In addition, a connecting plate in the lateral anti-disengaging assembly is subjected to the pulling force effect of a second spring, the connecting plate is always attached to the surface of a second fixing base, the position of a corresponding second sliding rod does not change, it is ensured that a second limiting roller does not loosen between the second sliding rod and a second shaft base, and the problem that the steel wire rope loses the anti-disengaging constraint due to nut loosening is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tower crane accessory device technical field, concretely is a tower crane pulley block steel wire rope anti -drop device. BACKGROUND

[0002] Tower crane has very extensive application in building construction, bridge construction, large -scale equipment installation and many fields because of its outstanding lifting capacity and high flexibility. Tower crane can efficiently and stably hoist and transport various heavy objects through the cooperation of pulley block and steel wire rope, and is the indispensable key equipment in modern engineering construction.

[0003] In the prior art, for example, the patent with the publication number CN217076770U discloses a tower crane pulley block steel wire rope anti -drop device. The device comprises a protective plate and a pulley, and a steel wire rope is arranged in the pulley groove at the upper end of the pulley, and the protective plate is symmetrically arranged on both sides of the pulley. The periphery of the pulley groove is respectively provided with first, second, third and fourth rollers; the first roller is provided with a first lead screw, the second roller is provided with a second lead screw, the third roller is provided with a third lead screw, and the fourth roller is provided with a fourth lead screw; the two ends of the first lead screw and the two ends of the second lead screw are connected with the protective plate, and the two ends of the first lead screw and the two ends of the second lead screw are provided with connecting holes; the two ends of the third lead screw and the two ends of the fourth lead screw pass through the connecting holes and are connected with the first lead screw and the second lead screw. The device prevents the steel wire rope from falling out of the groove through the lead screw on the roller, thereby improving safety and avoiding personal injury and property loss.

[0004] However, in the above-mentioned patent, although the rollers on the lead screw effectively prevent the steel wire rope from falling out of the groove, in actual use, the pulley block will be affected by mechanical vibration, which easily leads to the loosening of the nut on the lead screw. The loosening of the nut will cause the steel wire rope to lose effective anti -drop constraint, thereby increasing the risk of the steel wire rope falling out of the groove. In order to solve this problem, the utility model provides an improved tower crane pulley block steel wire rope anti -drop device. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a tower crane pulley block steel wire rope anti -drop device, which solves the problem that the pulley block will inevitably produce mechanical vibration during use, which easily leads to the loosening of the nut on the lead screw, and further causes the steel wire rope to lose effective anti -drop constraint, greatly increasing the risk of the steel wire rope falling out of the groove.

[0006] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0007] A tower crane pulley block steel wire rope anti -drop device, comprising a U-shaped frame, wherein the U-shaped frame is provided with an anti -drop mechanism, and the anti -drop mechanism comprises:

[0008] The longitudinal anti-off assembly is provided in two groups, two in each group, and the two groups of longitudinal anti-off assemblies are symmetrically distributed on the U-shaped frame, the longitudinal anti-off assembly comprises a first fixing seat mounted on the right outer wall of the U-shaped frame, a first sliding hole communicating with the inside of the U-shaped frame is formed in the first fixing seat, a first sliding rod is slidably arranged in the first sliding hole, a first shaft hole is formed in the left side of the first sliding rod, a fixed plate is fixedly connected to the right surface of the first sliding rod, and a first spring is fixedly connected between the fixed plate and the opposite surface of the U-shaped frame;

[0009] The lateral anti-off assembly is arranged in a staggered manner with the longitudinal anti-off assembly, and is provided in two groups, two in each group, and the two groups of lateral anti-off assemblies are symmetrically distributed on the U-shaped frame, and the two lateral anti-off assemblies in each group are symmetrically distributed on the U-shaped frame, the lateral anti-off assembly comprises a second fixing seat mounted on the inner wall of the U-shaped frame close to the edge, a second sliding hole is formed in the second fixing seat, a second sliding rod is slidably arranged in the second sliding hole, a connecting plate is mounted on the surface of the second sliding rod away from the U-shaped frame, the connecting plate extends outwardly of the U-shaped frame, a second spring is mounted on the surface of the connecting plate close to the U-shaped frame, a fixed block is mounted at one end of the second spring, and the fixed block is fixed on the outer wall of the U-shaped frame.

[0010] Preferably, the first spring is sleeved outside the first fixing seat, the longitudinal anti-off assembly further comprises a first shaft seat mounted on the left inner wall of the U-shaped frame, a second shaft hole is formed in the right side of the first shaft seat, the second shaft hole is arranged on the same center line as the first shaft hole, the left side of the first sliding rod extends into the inside of the U-shaped frame, and a first pull block is mounted on the right side of the fixed plate.

[0011] Preferably, a first limiting roller is arranged between the opposite surfaces of each first sliding rod and each first shaft seat, and the two ends of the first limiting roller are provided with first rotation shafts, one of the first rotation shafts is rotationally arranged in the first shaft hole, and the other first rotation shaft is rotationally arranged in the second shaft hole.

[0012] Preferably, a second pull block is mounted on the outer surface of one side of the connecting plate, and the lateral anti-off assembly further comprises a second shaft seat fixedly mounted on the inner wall of the U-shaped frame, a fourth shaft hole is formed in the surface of the second shaft seat facing the second fixing seat, and the fourth shaft hole is arranged on the same center line as the third shaft hole.

[0013] Preferably, a second limiting roller is arranged between the opposite surfaces of each second sliding rod and the second shaft seat, and the two ends of the second limiting roller are provided with second rotation shafts, one of the second rotation shafts is rotationally arranged in the third shaft hole, and the other second rotation shaft is rotationally arranged in the fourth shaft hole.

[0014] Preferably, the U-shaped frame is internally provided with a pulley above the lateral anti-falling assembly, the pulley is provided with a steel wire rope, and a channel capable of limiting the steel wire rope is formed between the two first limiting rollers at the position of each longitudinal anti-falling assembly and the two second limiting rollers at the position of the lateral anti-falling assembly.

[0015] Beneficial effects

[0016] Compared with the prior art, the tower crane pulley block steel wire rope anti-falling device has the following beneficial effects:

[0017] 1. When the pulley block works and mechanical vibration is generated, the fixed plate in the longitudinal anti-falling assembly is subjected to the action of the first spring tension, the fixed plate is always tightly attached to the end face of the first fixed seat, and the position of the corresponding first sliding rod also does not change, thereby ensuring that the first limiting roller does not fall off between the first sliding rod and the first shaft seat, and the connecting plate in the lateral anti-falling assembly is subjected to the action of the second spring tension, the connecting plate is always tightly attached to the surface of the second fixed seat, and the position of the corresponding second sliding rod also does not change, thereby ensuring that the second limiting roller does not fall off between the second sliding rod and the second shaft seat, and the problem that the nut falls off and the steel wire rope loses the anti-falling constraint is solved.

[0018] 2. The tower crane pulley block steel wire rope anti-falling device, by pulling the first pull block, the first sliding rod can be driven to slide in the first sliding hole, so that the first shaft hole and the second shaft hole are separated, at this time, the first shaft of the two ends of the first limiting roller can be taken out from the corresponding shaft hole, so that the old first limiting roller can be easily taken down, the new first limiting roller can be conveniently installed, and the maintenance convenience of the device is improved.

[0019] 3. The tower crane pulley block steel wire rope anti-falling device, by operating the second pull block, the second sliding rod is driven to slide in the second sliding hole, since the second limiting roller is arranged between the second sliding rod and the second shaft seat, and the second shaft of the two ends of the second limiting roller is rotatably arranged in the third shaft hole and the fourth shaft hole, when the second pull block is pulled, the second sliding rod will be displaced, and then the distance between the third shaft hole and the fourth shaft hole will change, so that the second shaft of the two ends of the second limiting roller can be taken out from the third shaft hole and the fourth shaft hole, the dismounting operation of the second limiting roller is realized, and the maintenance convenience of the device is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a three-dimensional appearance schematic view of the utility model;

[0021] Figure 2 It is a U-shaped frame partial sectional view of the utility model;

[0022] Figure 3 It is an exploded view of the longitudinal anti-falling assembly of the utility model;

[0023] Figure 4 The utility model discloses a lateral anti -drop subassembly exploded view;

[0024] Figure 5 The utility model discloses a first limiting roller and second limiting roller structure schematic view.

[0025] In the drawing: 1, U-shaped frame;2, pulley;3, longitudinal anti -drop subassembly;31, first fixed seat;311, first sliding hole;32, first sliding rod;321, first axle hole;33, fixed plate;34, first pull block;35, first spring;36, first axle seat;361, second axle hole;4, lateral anti -drop subassembly;41, second fixed seat;411, second sliding hole;42, second sliding rod;421, third axle hole;43, connecting plate;44, second pull block;45, fixed block;46, second spring;47, second axle seat;471, fourth axle hole;5, first limiting roller;51, first rotating shaft;6, second limiting roller;61, second rotating shaft;7, steel wire rope. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. It should be explained that the embodiments are only some examples of the utility model, not all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0027] The utility model provides two technical schemes:

[0028] Figures 1-5 The first embodiment is shown: a tower crane pulley block steel wire rope anti -drop device, including U-shaped frame 1, is equipped with anti -drop mechanism on U-shaped frame 1, and the anti -drop mechanism includes:

[0029] Longitudinal anti -drop subassembly 3, longitudinal anti -drop subassembly 3 number is equipped with two groups, and each group is two, and two groups of longitudinal anti -drop subassembly 3 are symmetrically distributed on U-shaped frame 1, and longitudinal anti -drop subassembly 3 includes the first fixed seat 31 installed on the right side outer wall of U-shaped frame 1, and the first fixed seat 31 is equipped with the first sliding hole 311 that communicates with the inside of U-shaped frame 1, and the first sliding hole 311 is slidably provided with the first sliding rod 32, and the left side of the first sliding rod 32 is equipped with the first axle hole 321, and the right surface of the first sliding rod 32 is fixedly connected with the fixed plate 33, and the fixed plate 33 is fixedly connected between the opposite side surface of U-shaped frame 1 with the first spring 35;

[0030] The lateral anti-off assembly 4 is arranged in a staggered manner with the longitudinal anti-off assembly 3, and there are two groups of the lateral anti-off assembly 4, each group has two lateral anti-off assemblies 4, the two groups of lateral anti-off assemblies 4 are symmetrically distributed on the U-shaped frame 1 in front and back, and the two lateral anti-off assemblies 4 in each group are symmetrically distributed on the U-shaped frame 1 in left and right, the lateral anti-off assembly 4 comprises a second fixing seat 41 installed on the inner wall of the U-shaped frame 1 close to the edge, a second sliding hole 411 is formed through the second fixing seat 41, a second sliding rod 42 is slidably arranged in the second sliding hole 411, a connecting plate 43 is installed on the surface of the second sliding rod 42 away from the U-shaped frame 1, the connecting plate 43 extends outwardly of the U-shaped frame 1, a second spring 46 is installed on the surface of the connecting plate 43 close to the U-shaped frame 1, one end of the second spring 46 is provided with a fixing block 45, and the fixing block 45 is fixed on the outer wall of the U-shaped frame 1.

[0031] Specifically, when the pulley block works to generate mechanical vibration, the fixed plate 33 in the longitudinal anti-off assembly 3 is subjected to the tension of the first spring 35, the fixed plate 33 always tightly abuts against the end face of the first fixing seat 31, and the position of the corresponding first sliding rod 32 also does not change, so that the first limiting roller 5 is ensured not to be off between the first sliding rod 32 and the first shaft seat 36, and the connecting plate 43 in the lateral anti-off assembly 4 is subjected to the tension of the second spring 46, the connecting plate 43 always tightly abuts against the surface of the second fixing seat 41, and the position of the corresponding second sliding rod 42 also does not change, so that the second limiting roller 6 is ensured not to be off between the second sliding rod 42 and the second shaft seat 47, and the problem that the nut is off and the steel wire rope 7 loses the anti-off constraint is solved.

[0032] Figures 1-5 The second embodiment is shown, and the main difference from the first embodiment is that the first spring 35 is sleeved outside the first fixing seat 31, the longitudinal anti-off assembly 3 further comprises a first shaft seat 36 installed on the left inner wall of the U-shaped frame 1, a second shaft hole 361 is formed in the right side of the first shaft seat 36, the second shaft hole 361 is arranged on the same axis line as the first shaft hole 321, the left side of each first sliding rod 32 extends into the inner side of the U-shaped frame 1, the right side of the fixed plate 33 is provided with a first pulling block 34, the opposite side surfaces between each first sliding rod 32 and each first shaft seat 36 are provided with a first limiting roller 5, and the two ends of the first limiting roller 5 are provided with a first rotating shaft 51, one of the first rotating shafts 51 is rotationally arranged in the first shaft hole 321, and the other first rotating shaft 51 is rotationally arranged in the second shaft hole 361.

[0033] Specifically, by pulling the first pulling block 34, the first sliding rod 32 can be slid in the first sliding hole 311 to separate the first shaft hole 321 from the second shaft hole 361, at this time, the first rotating shaft 51 at both ends of the first limiting roller 5 can be taken out from the corresponding shaft hole, so that the old first limiting roller 5 can be easily taken down, the new first limiting roller 5 can be conveniently installed, and the maintenance convenience of the device is improved.

[0034] In the embodiment, the second pull block 44 is mounted on one side of the outer surface of the connecting plate 43, the lateral anti-disengagement assembly 4 further comprises a second shaft seat 47 fixedly mounted on the inner wall of the U-shaped frame 1, the second shaft seat 47 is provided with a fourth shaft hole 471 on the side surface of the second fixed seat 41, and the fourth shaft hole 471 is coaxially arranged with the third shaft hole 421, and the second limiting roller 6 is arranged between the opposite side surfaces of each second sliding rod 42 and the second shaft seat 47, and the second limiting roller 6 is provided with a second rotating shaft 61 at both ends, one of the second rotating shafts 61 is rotatably arranged in the third shaft hole 421, and the other second rotating shaft 61 is rotatably arranged in the fourth shaft hole 471.

[0035] Specifically, by operating the second pull block 44, the second sliding rod 42 is driven to slide in the second sliding hole 411, since the second limiting roller 6 is arranged between the second sliding rod 42 and the second shaft seat 47, and the second rotating shafts 61 at both ends of the second limiting roller 6 are rotatably arranged in the third shaft hole 421 and the fourth shaft hole 471 respectively, when the second pull block 44 is pulled, the second sliding rod 42 will be displaced, and then the distance between the third shaft hole 421 and the fourth shaft hole 471 will change, so that the second rotating shafts 61 at both ends of the second limiting roller 6 can be pulled out of the third shaft hole 421 and the fourth shaft hole 471, the disassembly operation of the second limiting roller 6 is realized, and the maintenance convenience of the device is further improved.

[0036] In the embodiment, the pulley 2 is rotatably arranged above the lateral anti-disengagement assembly 4 in the U-shaped frame 1, and the steel wire rope 7 is arranged on the pulley 2, and the passage capable of limiting the steel wire rope 7 is formed between the two first limiting rollers 5 of each longitudinal anti-disengagement assembly 3 and the two second limiting rollers 6 of the lateral anti-disengagement assembly 4.

[0037] Specifically, when the steel wire rope 7 normally operates, the first limiting roller 5 and the second limiting roller 6 form a constraint on the steel wire rope 7 from the longitudinal direction and the lateral direction, which ensures the stable operation of the steel wire rope 7 and avoids the disengagement of the steel wire rope 7 or other abnormal position deviation, thereby ensuring the safe operation of the tower crane pulley block.

[0038] Meanwhile, the contents not described in detail in the specification all belong to the prior art known by those skilled in the art.

[0039] Working principle: when the pulley block works to generate mechanical vibration, the fixed plate 33 in the longitudinal anti-off assembly 3 is subjected to the pulling force of the first spring 35, the fixed plate 33 makes the first fixed seat 31 end face always tightly adhere to, and the position of the corresponding first sliding rod 32 also does not change, so that the first limiting roller 5 does not come off between the first sliding rod 32 and the first shaft seat 36, and the connecting plate 43 in the lateral anti-off assembly 4 is subjected to the pulling force of the second spring 46, the connecting plate 43 always tightly adheres to the surface of the second fixed seat 41, and the position of the corresponding second sliding rod 42 also does not change, so that the second limiting roller 6 does not come off between the second sliding rod 42 and the second shaft seat 47, and the problem that the nut comes off and the steel wire rope 7 loses the anti-off constraint is solved.

[0040] It should be noted that, in this document, the terms such as first and second are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between such entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or inherent to such a process, method, article or device.

[0041] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A tower crane pulley block wire rope anti-drop device comprising a U-shaped frame (1), characterized in that: The U-shaped frame (1) is provided with a anti-falling mechanism, the anti-falling mechanism comprises: The longitudinal anti-falling assembly (3) is provided with two groups, and two longitudinal anti-falling assemblies (3) are symmetrically distributed on the U-shaped frame (1), the longitudinal anti-falling assembly (3) comprises a first fixed seat (31) mounted on the right outer wall of the U-shaped frame (1), a first sliding hole (311) is formed in the first fixed seat (31) and communicates with the inside of the U-shaped frame (1), a first sliding rod (32) is slidably arranged in the first sliding hole (311), a first shaft hole (321) is formed in the left side of the first sliding rod (32), and a fixed plate (33) is fixedly connected to the right surface of the first sliding rod (32); the fixed plate (33) is fixedly connected between the opposite side surfaces of the U-shaped frame (1) through a first spring (35); The lateral anti-falling assembly (4) is arranged in a staggered manner with the longitudinal anti-falling assembly (3) and is provided with two groups, each group comprising two lateral anti-falling assemblies (4), and the two groups of lateral anti-falling assemblies (4) are symmetrically distributed on the U-shaped frame (1); the two lateral anti-falling assemblies (4) in each group are symmetrically distributed on the U-shaped frame (1), the lateral anti-falling assembly (4) comprises a second fixed seat (41) mounted on the inner wall of the U-shaped frame (1) near the edge, a second sliding hole (411) is formed in the second fixed seat (41), a second sliding rod (42) is slidably arranged in the second sliding hole (411), a connecting plate (43) is mounted on the side surface of the second sliding rod (42) away from the U-shaped frame (1), the connecting plate (43) extends outwardly of the U-shaped frame (1), a second spring (46) is mounted on the side surface of the connecting plate (43) close to the U-shaped frame (1), one end of the second spring (46) is provided with a fixed block (45), and the fixed block (45) is fixed to the outer wall of the U-shaped frame (1).

2. A tower crane pulley block wire rope anti-drop device according to claim 1, characterized in that: The first spring (35) is sleeved on the outside of the first fixed seat (31), the longitudinal anti-falling assembly (3) further comprises a first shaft seat (36) mounted on the left inner wall of the U-shaped frame (1), a second shaft hole (361) is formed in the right side of the first shaft seat (36), the second shaft hole (361) is coaxially arranged with the first shaft hole (321), the left side of the first sliding rod (32) extends into the inside of the U-shaped frame (1), and the right side of the fixed plate (33) is provided with a first pull block (34).

3. A tower crane pulley block wire rope anti-drop device according to claim 2, characterized in that: First limiting rollers (5) are arranged between the opposite side surfaces of each first sliding rod (32) and each first shaft seat (36), the first limiting rollers (5) are provided with first rotation shafts (51) at both ends, one of the first rotation shafts (51) is rotationally arranged in the first shaft hole (321), and the other first rotation shaft (51) is rotationally arranged in the second shaft hole (361).

4. A tower crane pulley block wire rope anti-drop device according to claim 3, characterized in that: The outer surface of one side of the connecting plate (43) is provided with a second pull block (44), the lateral anti-off assembly (4) further comprises a second shaft seat (47) fixedly installed on the inner wall of the U-shaped frame (1), a fourth shaft hole (471) is formed in the side surface of the second shaft seat (47) towards the second fixed seat (41), and the fourth shaft hole (471) is coaxially arranged with the third shaft hole (421).

5. A tower crane pulley block wire rope anti-drop device according to claim 4, characterized in that: Each second sliding rod (42) is provided with a second limiting roller (6) between the opposite side surfaces of the second shaft seat (47), both ends of the second limiting roller (6) are provided with a second rotating shaft (61), one of the second rotating shafts (61) is rotationally arranged in the third shaft hole (421), and the other second rotating shaft (61) is rotationally arranged in the fourth shaft hole (471).

6. A tower crane pulley block wire rope anti-drop device according to claim 5, characterized in that: A pulley (2) is rotationally arranged at a position above the lateral anti-off assembly (4) in the U-shaped frame (1), the pulley (2) is provided with a steel wire rope (7), and a channel capable of limiting the steel wire rope (7) is formed between the two first limiting rollers (5) at the position of each group of longitudinal anti-off assemblies (3) and the two second limiting rollers (6) at the position of the lateral anti-off assembly (4).

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