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Method and device for braking a crane

A braking device and crane technology, applied in the direction of hoisting device, safety device, transportation and packaging, etc., can solve the problem that the safety of lifting work cannot be guaranteed, so as to strengthen the braking force, improve the safety factor, guarantee The effect of personal safety

Active Publication Date: 2017-01-11
SHENZHEN SINE ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a braking method and device for a crane, which solves the technical problem in the prior art that the crane cannot be braked when the brake fails and the safety of the lifting work cannot be guaranteed. The braking system adds a safety protection using zero-servo function braking, which realizes the technical effect that the braking system can still perform normal braking after the brake of the crane fails, strengthens the braking force of the crane, and improves the safety factor of the crane , thereby ensuring the personal safety of the people

Method used

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  • Method and device for braking a crane

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Embodiment 1

[0050] Please refer to figure 1 , the embodiment of the present application provides a method for braking a crane, the crane is provided with a braking system, and the braking system includes a frequency converter, a brake, a motor (the "motor" mentioned in the embodiment of the present application Both are "lifting mechanism motor") and an encoder, wherein, when the brake receives the braking command sent by the frequency converter, the brake enters the brake state and brakes the rotating shaft of the motor. The methods described include:

[0051] S101: When the brake is in the brake state, receive an encoding pulse generated by the encoder during the process of detecting the rotation of the rotating shaft, and count the encoding pulse;

[0052] S102: Judging whether the coded pulse count is greater than a first preset number of times, and obtaining a first judging result;

[0053] S103: When the first determination result is yes, start the zero-servo function of the freque...

Embodiment 2

[0082] Based on the same inventive concept, the embodiment of the present application also provides a braking device for a crane, the crane is provided with a braking system, and the braking system includes a frequency converter, a brake, a motor and an encoder, wherein, when When the brake receives the braking command sent by the frequency converter, the brake enters the brake state and brakes the rotating shaft of the motor. Please refer to Figure 4 , the device includes:

[0083] The receiving unit 401 is configured to receive the encoding pulses generated by the encoder during the process of detecting the rotation of the rotating shaft when the brake is in the brake state, and count the encoding pulses;

[0084] A judging unit 402, configured to judge whether the coded pulse count is greater than a first preset number of times, and obtain a first judging result;

[0085] The control unit 403 is configured to control and start the zero-servo function of the frequency conv...

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Abstract

The invention discloses a braking method and device of a crane to solve the technical problems that in the prior art, when a brake is out of operation, a crane cannot brake, and the safety of hoisting work cannot be guaranteed. The method comprises the steps that when a brake is in a brake state, coded pulse generated by an encoder when the rotating process of a rotating shaft is detected is received, and the coded pulse is counted; whether the amount of coded pulse is larger than the preset number of times or not is judged, and a first judgment result is obtained; if yes, the zero servo function of a frequency converter is started, the rotating shaft of the motor is braked, and the technical effect that the brake system can still carry out normal braking after the brake of the crane is out of operation is achieved.

Description

technical field [0001] The invention relates to the technical field of cranes, in particular to a braking method and device for a crane. Background technique [0002] Cranes use mechanical principles to help humans move objects that ordinary human strength is not enough to move. They have been widely used in industrial development. For example, in the freight industry, they are used to move goods; in the construction industry, they are used to move large Equipment; In navigation technology, it is used to raise or lower items. It can be seen that cranes are an indispensable helper for the development of human society. [0003] Although cranes can bring convenience to people, lifting work has certain dangers, especially for the lifting work of large and heavy objects, its danger is even worse. The brake is a safety function part of the crane, which is used to prevent the heavy objects from falling. After the heavy objects are hoisted, whether they can be safely moved to the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66D5/00B66C15/00
CPCB66C15/00B66D5/00
Inventor 李朝张伟
Owner SHENZHEN SINE ELECTRIC
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