Balancing and fixing device for four lifting points

Abstract

The utility model discloses a balance fixing device for four lifting points, which comprises a balance rod, L-shaped rotating components are arranged at two ends of the balance rod, one group of rotating components is connected with one end of the balance rod through a detection component, and the other group of L-shaped rotating components is connected with the other end of the balance rod through a rotating shaft rod; one end of the bottom of the L-shaped rotating assembly is rotationally connected with one side of a corresponding lifting point on the trolley frame body through the mounting assembly, and the other end of the bottom of the L-shaped rotating assembly is rotationally connected with a corresponding steel wire rope fixing end on the crane; a photoelectric switch assembly is arranged on the trolley frame body and located on one side of one installation assembly and used for monitoring whether the steel wire ropes fixed to the two ends of the balance rod are broken or unbalanced in load or not. According to the balance fixing device for the four lifting points, the precision of an overload system can be greatly improved, the use requirement of a high-precision working condition is met, the combination of broken rope detection and overload detection is realized, and the structure of an electrical control device is optimized.

Description

TECHNICAL FIELD

[0001] The utility model relates to hoisting equipment technical field especially relates to a balance fixing device for four lifting points. BACKGROUND

[0002] In the crane industry, four lifting point rope winding mechanism is a commonly used form, especially in the sling hoisting industry and metallurgical ladle turning field, four lifting point structure plays an important role. But the mechanism due to the existence of 4 hoisting points may exist uneven force of lifting point, need to set up 4 weight sensors and according to certain electrical logic to realize the detection of hoisting capacity and overload protection, this not only increases the maintenance cost but also improves the probability of overload detection system failure; At the same time, four lifting point mechanism due to the change of wire rope swing stress direction, there will be the problem of inaccurate weighing precision.

[0003] Therefore, how to reduce the number of lifting point overload detection and improve the weighing precision has become an urgent problem to be solved. UTILITY MODEL CONTENT

[0004] In view of the above defects or deficiencies in the prior art, it is expected to provide a balance fixing device for four lifting points.

[0005] The balance fixing device for four lifting points is installed and arranged between the adjacent two lifting points of the trolley frame body of the crane, comprising a balance bar arranged in the horizontal direction, and L-shaped rotating components are arranged at both ends of the balance bar; one group of L-shaped rotating components is arranged at one end of the balance bar through a detection component, and the other group of L-shaped rotating components is arranged at the end of the balance bar away from the detection component through a rotating shaft; the top of the L-shaped rotating component is connected to the corresponding end of the balance bar; the bottom of the L-shaped rotating component is rotatably connected to the corresponding side of the lifting point on the trolley frame body through a mounting component, and the other end of the bottom of the L-shaped rotating component is rotatably connected to the fixed end of the wire rope of the crane; the trolley frame body is provided with a photoelectric switch component on the side of one group of mounting components, which is used to monitor whether the wire rope fixed at both ends of the balance bar is broken or off-load phenomenon occurs.

[0006] The fixed ends of the wire ropes at both ends of the balance bar are arranged in a symmetrical manner in the natural unstressed state.

[0007] Further, the L-shaped rotating component comprises two symmetrically arranged L-shaped clamping plates, and a connecting plate is fixed between the two L-shaped clamping plates.

[0008] Further, the detection assembly adopts an axle type load cell; one end of the balance bar is arranged between the top portions of the two corresponding L-shaped clamping plates and is rotationally connected with the L-shaped clamping plates through the axle type load cell.

[0009] Further, the mounting assembly comprises symmetrical support plates fixed on the sides of the trolley frame body; one end of the bottom portions of the L-shaped rotating assemblies is arranged between the two corresponding support plates and is rotationally connected with the support plates through first pin shafts.

[0010] Further, the steel wire rope fixed end is rotationally arranged at the bottom portion of the L-shaped rotating assembly away from the mounting assembly through a second pin shaft.

[0011] Further, the photoelectric switch assembly is arranged on the top surface of the trolley frame body on the side away from the corresponding steel wire rope fixed end of the mounting assembly, and comprises an L-shaped mounting plate fixed on the top surface of the trolley frame body, a photoelectric switch fixed on the L-shaped mounting plate, and a detection end of the photoelectric switch arranged on the side of the L-shaped mounting plate close to the balance bar; in the normal operation state, the height of the detection end of the photoelectric switch is lower than the bottom surface of the balance bar.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The four-suspension-point balance fixing device has the following advantages: the two suspension points at the two ends of the balance bar always bear the same force, the two suspension points can be regarded as one suspension point from the force perspective, the number of suspension points is optimized, the number of sensors is reduced, the force model of the crane becomes simpler, and the probability of fault error of the overload system is reduced; the force at the horizontal balance bar is always along the direction of the balance bar, the force direction is unchanged, the precision of the overload system is greatly improved, and the use requirement of high-precision working conditions is met; the photoelectric switch detects the position of the horizontal arm when it moves downward, judges whether the two steel wire ropes are broken or have unbalanced load, realizes the combination of the broken rope detection and the overload detection, and optimizes the structure of the electrical control device.

[0014] In addition, the photoelectric switch detects the position of the horizontal arm when it moves downward, judges whether the two steel wire ropes are broken or have unbalanced load, realizes the combination of the broken rope detection and the overload detection, and optimizes the structure of the electrical control device.

[0015] In summary, the utility model discloses can optimize the stress model of the whole hoisting force fixed end system, realizes the optimization of the number of lifting points on the mechanics level, makes 4 lifting points optimize 3 lifting points, and 4 sensors optimize 3 sensors originally, improves the stability of entire weighing system, reduces the probability of failure through reducing the number of electrical equipment, guarantees the stress direction of sensor detection point, improves detection precision, can play an important role in the field of intelligent hoisting and four lifting points.

[0016] It should be understood that the content described in the utility model content part is not intended to limit the key or important features of the embodiments of the utility model, nor to limit the scope of the utility model.

[0017] Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0018] Other features, objects and advantages of the utility model will become more apparent by reading the detailed description of the non-limiting embodiments made with reference to the following drawings:

[0019] Fig. 1 A structure schematic view of a four-lifting-point balancing fixing device provided by the utility model embodiment is assembled on a trolley frame body;

[0020] Fig. 2 An enlarged structure schematic view of the four-lifting-point balancing fixing device assembled on the trolley frame body;

[0021] Fig. 3 A structure schematic view of the four-lifting-point balancing fixing device assembled on the trolley frame body from the top;

[0022] Reference signs in the drawings: 1, trolley frame body; 2, steel wire rope fixed end; 3, balancing rod; 4, L-shaped rotating assembly; 41, L-shaped clamping plate; 42, connecting plate; 5, shaft type weighing sensor; 6, mounting assembly; 61, supporting plate; 62, first pin shaft; 7, second pin shaft; 8, L-shaped mounting plate; 9, photoelectric switch; 10, rotating shaft rod. DETAILED DESCRIPTION

[0023] The utility model will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the related utility model, and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for convenience of description.

[0024] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below in combination with the drawings and embodiments.

[0025] Generally, in the crane industry, the four-suspension-point rope winding mechanism generally includes four suspension points in a quadrilateral structure. The four-suspension-point balancing fixing device of the present application can be applied between any two adjacent suspension points of the four suspension points according to actual conditions, the force of the two suspension points is synchronized to make the forces of the two suspension points the same, and the optimization from four suspension points to three suspension points is realized; and the force direction of the fixed suspension point is used to improve the actual precision of the shaft type load cell.

[0026] Please refer to Figs. 1-3 The embodiment of the present application provides a four-suspension-point balancing fixing device which is installed between two adjacent suspension points of a trolley frame body 1 of a crane and includes a balance bar 3 arranged in a horizontal direction, two ends of the balance bar 3 are provided with L-shaped rotating assemblies 4, one group of L-shaped rotating assemblies 4 is arranged at one end of the balance bar 3 through a detection assembly, and the other group of L-shaped rotating assemblies 4 is arranged at an end of the balance bar 3 away from the detection assembly through a rotating shaft 10.

[0027] That is, the detection of the two suspension points is combined into the detection of one suspension point.

[0028] The top of the L-shaped rotating assembly 4 is connected to the corresponding end of the balance bar 3; the bottom of the L-shaped rotating assembly 4 is rotatably connected to one side of the corresponding suspension point on the trolley frame body 1 through a mounting assembly 6, and the other end of the bottom of the L-shaped rotating assembly 4 is rotatably connected to the corresponding steel wire rope fixed end 2 of the crane; that is, the two steel wire rope fixed ends 2 are mounted on the trolley frame body 1 through the balancing fixing device.

[0029] The two steel wire rope fixed ends 2 at the two ends of the balance bar 3 are arranged in a symmetrical manner in a natural non-stressed state.

[0030] In a preferred embodiment, the L-shaped rotating assembly 4 includes two symmetrically arranged L-shaped clamping plates 41, and a connecting plate 42 is fixedly arranged between the two L-shaped clamping plates 41 to improve the structural stability of the L-shaped rotating assembly 4 after installation.

[0031] In a preferred embodiment, the detection assembly adopts a shaft type load cell 5 which can be used as a rotating shaft; one end of the balance bar 3 is arranged between the top of the corresponding two L-shaped clamping plates 41 and rotatably connected to the L-shaped clamping plates 41 through the shaft type load cell 5.

[0032] In a preferred embodiment, the mounting assembly 6 includes symmetrically fixed support plates 61 arranged on the side surface of the trolley frame body 1; one end of the bottom of one group of L-shaped rotating assemblies 4 is arranged between the corresponding two support plates 61 and rotatably connected to the support plates 61 through a first pin shaft 62.

[0033] The first pin shaft 62 on which a set of L-shaped mounting assemblies 4 is located is arranged directly above the shaft type load sensor 5;

[0034] In a preferred embodiment, the steel wire fixed end 2 is arranged at the end of the bottom of the L-shaped rotating assembly 4 away from the mounting assembly 6 through the rotation of the second pin shaft 7, and is used for connecting the steel wire fixed end 2 and the L-shaped rotating assembly 4.

[0035] The trolley frame body 1 is provided with a photoelectric switch assembly on one side of a set of mounting assemblies 6, which is used for monitoring whether the steel wire fixed at both ends of the balance bar 3 is broken or off-load.

[0036] Specifically, the photoelectric switch assembly is arranged on the top surface of the trolley frame body 1 on the side away from the corresponding steel wire fixed end 2 of a set of mounting assemblies 6, and the photoelectric switch assembly comprises an L-shaped mounting plate 8 fixedly arranged on the top surface of the trolley frame body 1, and a photoelectric switch 9 fixedly arranged on the L-shaped mounting plate 8, wherein the detection end of the photoelectric switch 9 is arranged on the side of the L-shaped mounting plate 8 close to the balance bar 1.

[0037] According to actual conditions, the vertical distance between the detection end of the photoelectric switch 9 and the bottom surface of the balance bar 3 is adjusted, and a standard range is set, if the balance bar 3 is translated downwardly by more than the set distance and is monitored by the photoelectric switch 9, it indicates that the steel wire fixed end 2 is seriously off-load or broken; in the normal operation state, the height of the detection end of the photoelectric switch 9 is lower than the bottom surface of the balance bar 3.

[0038] The working principle of the utility model is as follows:

[0039] The steel wire fixed end 2 is stressed, and the stress is transmitted to the horizontal balance bar 3 through the L-shaped rotating assembly 4, the shaft type load sensor 5 on the balance bar 3 is stressed in the fixed direction (horizontal), and the stress forms a lever effect through the force arm difference on both sides of the L-shaped rotating assembly 4, so that the stress on the shaft type load sensor 5 is small, a sensor with a smaller model range can be selected, and the cost is reduced.

[0040] When the stresses of the two steel wire fixed ends 2 are consistent, the stresses of the two ends of the balance bar 3 are the same, and the balance bar is in the central position.

[0041] When the stress of the steel wire fixed end 2 on one side becomes large, the L-shaped rotating assembly 4 will rotate around the first pin shaft 62, and the force arm of the stress position of the steel wire fixed end 2 will be reduced accordingly until the stresses of the two ends of the balance bar 3 are equal again, so that the stresses on both sides of the balance bar 3 are always consistent, that is, the shaft type load sensor 5 is installed on any one side of the balance bar 3, and the weight measured by the shaft type load sensor 5 is the stress of any one of the two lifting points.

[0042] If in the use process, if serious unbalance load or because special situation causes one of the lifting point wire rope breakage, the other side L type rotating assembly 4 can rotate under the action of single side stress with the first pin shaft 62 as the rotating point, the balance bar 3 is driven downward by the L type rotating assembly 4, and is detected by the photoelectric switch 9, so as to realize the breakage detection.

[0043] Through the setting of two L type rotating assemblies 4 and the intermediate balance bar 3, the stress of the two lifting points is always consistent, from the stress angle, the two lifting points can be regarded as one lifting point, so as to realize the optimization of the number of lifting points, the stress model of the crane becomes simpler, and the probability of overload system fault error is also reduced. Since the stress at the horizontal balance bar is always along the direction of the balance bar, the stress direction is guaranteed to be unchanged, which can greatly improve the accuracy of the overload system and meet the use requirements of high-precision working conditions. In addition, by detecting the position of the horizontal arm, it is judged whether the two wire ropes are broken, and the combination of breakage detection and overload detection is realized, and the structure of the electrical control device is optimized.

[0044] In the description of the present specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integral connection; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In the description of the present specification, the description of the terms "one embodiment", "some embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A four-point balance fixing device installed between two adjacent hoisting points of a trolley frame of a crane, characterized in that, Balancing rod is arranged in horizontal direction, both ends of the balancing rod are provided with L-shaped rotating assembly; one group of the L-shaped rotating assembly is arranged at one end of the balancing rod through detection assembly, another group of the L-shaped rotating assembly is arranged at the end of the balancing rod away from the detection assembly through rotating shaft; the top of the L-shaped rotating assembly is connected with the corresponding end of the balancing rod; one end of the bottom of the L-shaped rotating assembly is rotatably connected with the side of the corresponding lifting point on the trolley frame body through mounting assembly, the other end of the bottom of the L-shaped rotating assembly is rotatably connected with the corresponding fixed end of the steel wire rope on the crane; the trolley frame body is provided with photoelectric switch assembly on the side of one group of the mounting assembly, which is used for monitoring whether the steel wire rope fixed at both ends of the balancing rod is broken or off-load phenomenon; The fixed ends of the steel wire rope at both ends of the balancing rod are arranged in relative symmetry in natural stress-free state.

2. The four-point suspension system according to claim 1, wherein The L-shaped rotating assembly comprises two symmetrically arranged L-shaped clamping plates, and a connecting plate is fixed between the two L-shaped clamping plates.

3. The four-point suspension system according to claim 2, wherein The detection assembly adopts shaft type weighing sensor; one end of the balancing rod is arranged between the top of the corresponding two L-shaped clamping plates and rotatably connected with the L-shaped clamping plate through the shaft type weighing sensor.

4. The four-point suspension apparatus according to claim 1, characterized by The mounting assembly comprises symmetrically fixed support plates arranged on the side surface of the trolley frame body; one end of the bottom of one group of the L-shaped rotating assembly is arranged between the corresponding two support plates and rotatably connected with the support plate through the first pin shaft.

5. The four-point suspension apparatus according to claim 1, characterized by The fixed end of the steel wire rope is rotatably arranged at the end of the bottom of the L-shaped rotating assembly away from the mounting assembly through the second pin shaft.

6. The four-point suspension apparatus according to claim 1, characterized by The photoelectric switch assembly is arranged on the top surface of the trolley frame body on the side away from the corresponding fixed end of the steel wire rope, the photoelectric switch assembly comprises an L-shaped mounting plate fixed on the top surface of the trolley frame body, and a photoelectric switch is fixed on the L-shaped mounting plate, and the detection end of the photoelectric switch is arranged on the side of the L-shaped mounting plate close to the balancing rod; In normal operation state, the height of the detection end of the photoelectric switch is lower than the bottom surface of the balancing rod.

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