Super-tonnage double-speed redundant hoisting mechanism

Abstract

The utility model relates to a super-tonnage double-speed redundant hoisting mechanism in the technical field of hoisting units of cranes, which comprises a first hoisting unit, a second hoisting unit, a third hoisting unit and a fourth hoisting unit, the second lifting unit comprises a second motor, a second speed reducer, a second winding drum group and a second fixed pulley group; the first lifting unit and the second lifting unit are connected through winding of a steel wire rope. Each lifting unit is provided with two motors and two speed reducers; the lifting device is composed of two independent lifting units, each unit comprises two motors, two speed reducers, a winding drum set and a set of pulleys, the two units are connected in a winding mode through a steel wire rope, and when any motor or any lifting unit breaks down, the other unit can independently bear all loads and maintain the half-speed working state.

Description

Technical Field

[0001] The utility model relates to the technical field of crane hoisting units, in particular to an ultra-large tonnage double-speed redundant hoisting mechanism. Background Art

[0002] With the development of modern industry, cranes are increasingly used in various fields. Especially in large-scale manufacturing, port logistics, construction and other industries, the demand for cranes is not only reflected in the increase in lifting tonnage, but also in the increasing requirements for speed, efficiency, safety and reliability. In order to meet these needs, the design of the lifting unit must take into account a variety of factors, including but not limited to efficient power transmission, precise speed control, system redundancy to ensure high availability, and cost-effectiveness.

[0003] Traditional lifting units usually use a single motor drive solution. When the motor or its associated components fail, the entire system will not be able to operate normally, which may cause the production line to stagnate and cause huge economic losses. To solve this problem, some existing solutions have introduced redundant designs, such as using planetary reducer structures or reducers with dual-speed functions to improve the reliability of the system. However, these methods are often accompanied by complex mechanical structures, which increase the difficulty of operation and maintenance costs. In addition, traditional redundant designs do not fully consider the adjustability of the lifting speed. In the event of failure of some components, how to maintain a certain working efficiency has become an urgent problem to be solved. Therefore, the market urgently needs a new type of lifting unit that can both ensure high reliability and achieve speed adjustment.

[0004] To this end, we designed an ultra-large tonnage dual-speed redundant lifting mechanism. Utility Model Content

[0005] In order to overcome the deficiencies in the background technology, the utility model discloses an ultra-large tonnage dual-speed redundant lifting mechanism.

[0006] In order to achieve the above utility model purpose, the utility model adopts the following technical solutions:

[0007] An ultra-large tonnage dual-speed redundant lifting mechanism, comprising:

[0008] A first lifting unit, comprising a first motor, a first reducer, a first drum assembly and a first fixed pulley assembly;

[0009] A second lifting unit, which includes a second motor, a second reducer, a second drum assembly and a second fixed pulley assembly;

[0010] The first lifting unit is connected to the second lifting unit by winding a steel wire rope;

[0011] Each lifting unit is equipped with two motors and two reducers; when any one of the motors fails, the failed lifting unit stops rotating while the other lifting unit continues to work, allowing the entire system to continue operating at a reduced speed.

[0012] Preferably, it also includes a first movable pulley set and a second movable pulley set. When the two lifting units are in motion at the same time, the two movable pulley sets are used as balancing pulleys; and when any one of the lifting units fails, the two movable pulley sets are used as movable pulleys.

[0013] Preferably, the steel wire rope is wound and connected with both movable pulley sets.

[0014] Preferably, it also includes a hook group for connecting and controlling the lifting action of the hoisted object; two movable pulley groups are respectively arranged at the two ends of the top of the hook group.

[0015] Preferably, the lifting unit further comprises a braking device respectively arranged on the output shaft of each motor, for providing safety protection when the motor fails or needs to stop.

[0016] Preferably, the motors are connected to respective reducers via couplings.

[0017] Preferably, the two motors in the lifting unit are located inside the ends of the corresponding winding drum groups.

[0018] Preferably, the fixed pulley block in the lifting unit is located between the corresponding two motors.

[0019] Preferably, the axis of the fixed pulley block in the lifting unit is parallel to the axis of the drum block.

[0020] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0021] It consists of two independent lifting units, each unit contains two motors, two reducers, a drum group and a group of pulleys (fixed pulley group and movable pulley group). The two units are connected by wire rope. When the two work at the same time, the four motors work together to ensure that the hook group can be lifted and lowered smoothly at full speed. When any motor or one lifting unit fails, the other unit can bear the entire load independently. Although the system's multiplier will be doubled at this time, it can still maintain half-speed working state, realizing true redundancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a top view of the utility model;

[0023] Figure 2 It is the front view of the utility model;

[0024] Figure 3This is a schematic diagram of the first rope winding method of the utility model;

[0025] Figure 4 This is a schematic diagram of the second rope winding method of the utility model;

[0026] Figure 5 This is a schematic diagram of the third rope winding method of the utility model;

[0027] Figure 6 This is a schematic diagram of the fourth rope winding method of the utility model.

[0028] In the figure: 1. first motor; 2. first reducer; 3. first drum group; 4. first fixed pulley group; 5. second motor; 6. second reducer; 7. second drum group; 8. second fixed pulley group; 9. wire rope; 10. first movable pulley group; 11. second movable pulley group; 12. hook group; 13. brake device; 14. coupling. DETAILED DESCRIPTION

[0029] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. to indicate directions or positional relationships, they only correspond to the drawings of the present application, in order to facilitate the description of the present invention; it should be understood that if there are terms such as "end", "side", "end part", "lateral", "lateral", "transverse", "longitudinal", etc. to indicate directions or positional relationships, they only correspond to the length and width of the corresponding parts, that is, "end part" indicates the head and tail areas in the length direction of the corresponding part, and "side part" indicates the head and tail areas in the width direction of the corresponding part; this is for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction.

[0030] Embodiment 1, in combination with the attached Figure 1-6 , an ultra-large tonnage dual-speed redundant lifting mechanism, comprising:

[0031] The first lifting unit comprises a first motor 1, a first reducer 2, a first drum assembly 3 and a first fixed pulley assembly 4;

[0032] Specifically, two first motors 1 and two first reducers 2 are provided at both ends of the first reel group 3; as required, the first motor 1 is connected to the first reducer 2 in the same direction through a coupling 14;

[0033] Furthermore, in order to provide safety protection when the motor fails or needs to stop, the output shaft of the first motor 1 also has a braking device 13.

[0034] The second lifting unit comprises a second motor 5, a second reducer 6, a second drum assembly 7 and a second fixed pulley assembly 8;

[0035] As required, the structure of the second lifting unit is the same as that of the first lifting unit, and will not be described in detail here.

[0036] The first lifting unit is connected to the second lifting unit by winding a steel wire rope 9;

[0037] In a possible implementation, one end of the steel wire rope 9 is fixed on the first drum set 3 , and the other end is fixed on the second drum set 7 , and the rope body is wound around the first fixed pulley set 4 and the second fixed pulley set 8 .

[0038] During specific operation, it also includes a hook group 12, which is used to connect and control the lifting and lowering action of the object being lifted; the top of the hook group 12 is provided with a movable pulley group;

[0039] When there is only one movable pulley block at the top of the hook group 12, Figure 3 The wire rope 9 is wound around the first drum group 3, the first fixed pulley group 4, the movable pulley group, the second fixed pulley group 8 and the second drum group 7 in sequence.

[0040] When there are two movable pulley groups on the top of the hook group 12, preferably, the two movable pulley groups are respectively arranged at the two ends of the top of the hook group 12; for convenience of description, the two movable pulley groups are respectively the first movable pulley group 10 and the second movable pulley group 11. Figure 6 At this time, the wire rope 9 can be wound around the first drum set 3, the first movable pulley set 10, the first fixed pulley set 4, the first movable pulley set 10, the second movable pulley set 11, the second fixed pulley set 8, the second movable pulley set 11 and the second drum set 7 in sequence. Among them, the first movable pulley set 10 and the first fixed pulley set 4, and the second movable pulley set 11 and the second fixed pulley set 8 can be wound multiple times as needed.

[0041] Combined with Figure 4-5 The wire rope 9 can also be wound around the first drum group 3, the first fixed pulley group 4, the first movable pulley group 10, the second movable pulley group 11, the second fixed pulley group 8 and the second drum group 7 in sequence; wherein, the first movable pulley group 10 and the first fixed pulley group 4, and the second movable pulley group 11 and the second fixed pulley group 8 can be wound multiple times as needed.

[0042] The design is specifically based on the number of pulleys in the pulley block. For example, in the first winding method, the number of pulleys in the movable pulley block is one more than the number of pulleys in the fixed pulley block; in the second winding method, the number of pulleys in the movable pulley block is the same as the number of pulleys in the fixed pulley block.

[0043] At this time, the movable pulley group has two functions: 1. When the two lifting units are in operation at the same time, the two movable pulley groups are used as balance pulleys; 2. When any one of the lifting units fails, the failed lifting unit stops rotating, and the other lifting unit continues to work, the two movable pulley groups are used as movable pulleys.

[0044] Furthermore, each lifting unit is equipped with two motors and two reducers; when any one of the motors fails, the failed lifting unit stops rotating, and the other lifting unit continues to work, so that the entire system continues to operate at a reduced speed. That is, when only one lifting unit is in operation, the lifting speed of the hook group 12 is lower than when two lifting units are in operation at the same time; preferably, when only one lifting unit is in operation, the lifting speed of the hook group 12 is half of the lifting speed of the hook group 12 when two lifting units are in operation at the same time.

[0045] The working principle is: when two sets of lifting units are in operation at the same time, the four motors work together, and the movable pulley group serves as a balance pulley, so that the ratio of the entire system is fixed and the hook group can be raised and lowered at a normal speed; if any motor or lifting unit fails, the drum group of the failed unit stops rotating, while the other unit continues to work; at this time, all movable pulleys are converted to movable pulley mode, and the ratio of the entire system is doubled, thereby achieving half-speed operation and avoiding significant losses due to equipment downtime.

[0046] Embodiment 2, combined with the attached Figure 1 , a super-large tonnage dual-speed redundant lifting mechanism, based on the first embodiment, in order to improve the compactness of the lifting mechanism structure, the two motors in the lifting unit are located at the inner side of the corresponding drum group end;

[0047] Specifically, the reel group and the motor connected to the reducer are located on the same side of the reducer.

[0048] Furthermore, the fixed pulley assembly in the lifting unit is located between the corresponding two motors.

[0049] As required, the axis of the fixed pulley block in the lifting unit is parallel to the axis of the drum block.

[0050] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. An ultra-large tonnage dual-speed redundant lifting mechanism, comprising: A first lifting unit, comprising a first motor (1), a first reducer (2), a first reel assembly (3) and a first fixed pulley assembly (4); A second lifting unit, comprising a second motor (5), a second reducer (6), a second drum assembly (7) and a second fixed pulley assembly (8); The invention is characterized in that: the first lifting unit and the second lifting unit are connected by winding a steel wire rope (9); Each lifting unit is equipped with two motors and two reducers; when any one of the motors fails, the failed lifting unit stops rotating while the other lifting unit continues to work, allowing the entire system to continue operating at a reduced speed.

2. The super-large tonnage dual-speed redundant lifting mechanism according to claim 1 is characterized in that: It also comprises a first movable pulley set (10) and a second movable pulley set (11). When the two lifting units are in operation simultaneously, the two movable pulley sets are used as balancing pulleys; and when any one of the lifting units fails, the two movable pulley sets are used as movable pulleys.

3. The super-large tonnage dual-speed redundant lifting mechanism according to claim 2 is characterized in that: The steel wire rope (9) is wound and connected to both movable pulley blocks.

4. The super-large tonnage dual-speed redundant lifting mechanism according to claim 2 is characterized in that: It also comprises a hook group (12) for connecting and controlling the lifting and lowering action of the lifted object; two movable pulley groups are respectively arranged at the two ends of the top of the hook group (12).

5. The super-large tonnage dual-speed redundant lifting mechanism according to claim 1 is characterized in that: The lifting unit also includes a braking device (13) respectively arranged on the output shaft of each motor, which is used to provide safety protection when the motor fails or needs to stop.

6. The super-large tonnage dual-speed redundant lifting mechanism according to claim 1 is characterized in that: The motors are connected to respective reducers via couplings (14).

7. The super-large tonnage dual-speed redundant lifting mechanism according to claim 1 is characterized in that: The two motors in the lifting unit are located inside the ends of the corresponding winding drum groups.

8. The super-large tonnage dual-speed redundant lifting mechanism according to claim 7 is characterized in that: The fixed pulley block in the lifting unit is located between the corresponding two motors.

9. The super-large tonnage dual-speed redundant lifting mechanism according to claim 1 is characterized in that: The axis of the fixed pulley block in the lifting unit is parallel to the axis of the drum block.

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