Multi-brake lifting device of crane

Abstract

The utility model relates to the technical field of lifting equipment, in particular to a multi-brake lifting device of a crane, which comprises a motor connected with a steel wire rope reel through a speed reducer and a multi-brake system comprising a steel wire rope reel safety brake arranged at the tail end of the steel wire rope reel. The multi-braking system further comprises at least one of a motor working brake and a speed reducer emergency brake, a steel wire rope reel safety brake, the motor working brake and the speed reducer emergency brake are distributed at the two ends of the steel wire rope reel, and therefore it is guaranteed that multi-braking protection is conducted on the lifting device, and the safety performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, in particular to a multi-brake lifting device for a crane. Background Art

[0002] A crane is used to lift or move materials and is widely used in factories, mines, etc.

[0003] The existing lifting device of a crane includes a motor installed on a moving or fixed platform. The output shaft of the motor is connected to a wire rope drum through a speed reducer. The wire rope drum is connected to a spreader through a wire rope winding system, so as to realize the lifting of materials. To achieve braking, those skilled in the art usually use a brake motor or connect a safety brake to the wire rope drum, which cannot achieve multiple braking and the safety performance is limited. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a multi-brake lifting device for a crane that can perform multiple braking.

[0005] The utility model is realized through the following technical solutions: A multi-brake lifting device for a crane includes a motor. The motor is connected to a wire rope drum through a speed reducer, and further includes a multi-brake system. The multi-brake system includes a wire rope drum safety brake arranged at the end of the wire rope drum. The multi-brake system further includes at least one of a motor working brake and a speed reducer emergency brake.

[0006] Further, both the motor working brake and the speed reducer emergency brake are selected as DHD2 fast power-off brakes.

[0007] Further, the motor working brake is installed at the rear end of the motor.

[0008] Further, the speed reducer emergency brake is connected to one of the transmission shafts of the speed reducer.

[0009] Further, the wire rope drum is further connected with an overspeed switch, and the overspeed switch is electrically connected to the wire rope drum safety brake.

[0010] Further, the wire rope drum safety brake is a friction disc type brake.

[0011] The beneficial effects of the present utility model are as follows: The multiple braking system includes a wire rope drum safety brake provided at the end of the wire rope drum. The multiple braking system further includes at least one of a motor working brake and a reducer emergency brake. The wire rope drum safety brake, the motor working brake, and the reducer emergency brake are distributed at both ends of the wire rope drum, thereby ensuring multiple braking protection for the lifting device and improving safety performance. Description of the Drawings

[0012] Figure 1 It is a front view schematic diagram of Embodiment 1;

[0013] Figure 2 It is a left view schematic diagram of Embodiment 1;

[0014] Figure 3 It is a top view schematic diagram of Embodiment 1.

[0015] Wherein: 1, wire rope drum; 2, motor; 3, motor working brake; 4, reducer; 5, reducer emergency brake; 6, overspeed switch; 7, wire rope drum safety brake; 8, wire rope winding system; 9, spreader. Specific Embodiments

[0016] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Embodiment 1

[0019] As Figures 1-3 shown, a multiple-braking lifting device for a crane includes a motor 2. The motor is an explosion-proof motor. The motor is connected to a wire rope drum 1 through a reducer 4. The wire rope drum is connected to a spreader 9 through a wire rope winding system 8. The wire rope winding system is a pulley block. The motor and the wire rope drum are fixed to a moving or fixed platform.

[0020] It also includes a multiple braking system. The multiple braking system includes a wire rope drum safety brake 7 installed at the end of the wire rope drum. The wire rope drum safety brake is a friction disc type brake. The rotating disc of the friction disc type brake is connected to the main shaft of the wire rope drum, so as to brake at the end of the wire rope drum. The friction disc type brake is selected and installed at the end of the wire rope drum, which has a large safety range and can select the size of the friction disc according to needs, so as to ensure sufficient braking torque.

[0021] The multiple braking system also includes at least one of a motor service brake 3 and a reducer emergency brake 5. In this embodiment, the multiple braking system also includes a motor service brake and a reducer emergency brake. Among them, both the motor service brake and the reducer emergency brake are selected as DHD2 fast power-off brakes, which have a relatively fast response speed. The motor service brake is installed at the rear end of the motor, and the reducer emergency brake is connected to one of the transmission shafts of the reducer, specifically, the high-speed shaft can be selected to brake under a small torque, so as to realize that the motor, the reducer and the wire rope drum are all braked, and both ends are braked to ensure braking stability. The motor service brake, the reducer emergency brake and the wire rope drum safety brake are all selected as explosion-proof models to ensure the safety performance of use.

[0022] The wire rope drum is also connected with an overspeed switch 6. The overspeed switch is electrically connected to the wire rope drum safety brake. In this embodiment, the overspeed switch is selected as an explosion-proof safety switch. When the hoisting device is in a stall state, the overspeed switch acts, and the wire rope drum safety brake makes a braking action to ensure that the suspended object will not accidentally fall. Then the motor stops working, and the motor service brake and the reducer emergency brake act to realize the segmented braking of the whole system and ensure braking stability.

[0023] The motor service brake, the reducer emergency brake and the wire rope drum safety brake are all selected as brakes with manual release functions, which can manually control the brakes to safely lower the suspended heavy object in case of power failure and other emergencies, and at the same time can realize segmented maintenance to determine the fault area and then carry out maintenance.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A crane multi-brake hoisting device, comprising an electric motor, the electric motor is connected to a wire rope drum through a reducer, characterized in that: It also includes a multiple braking system, which includes a wire rope drum safety brake arranged at the end of the wire rope drum, and the multiple braking system also includes at least one of a motor working brake and a reducer emergency brake.

2. The crane multi-brake hoisting device according to claim 1, characterized in that: The motor working brake and the reducer emergency brake are both DHD2 fast power-off brakes.

3. The crane multi-brake hoisting device according to claim 1 or 2, characterized in that: The motor working brake is installed at the rear end of the motor.

4. The crane multi-brake hoisting device according to claim 1 or 2, characterized in that: The speed reducer emergency brake is connected to one of the transmission shafts of the speed reducer.

5. The crane multi-brake hoisting device according to claim 1, characterized in that: The wire rope drum is also connected to an overspeed switch, and the overspeed switch is electrically connected to the wire rope drum safety brake.

6. The crane multi-brake hoisting device according to claim 1 or 5, characterized in that: The wire rope drum safety brake is a friction disc brake.

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