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Brake control device and crane

A brake control and control valve technology, which is applied in hoisting devices and other directions, can solve the problems of large oil return back pressure in the brake chamber, and achieve the effects of reducing braking time, reducing pressure loss, and accelerating oil return speed

Active Publication Date: 2015-04-22
XUZHOU HEAVY MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a brake control device and a crane equipped with the brake control device, which solves the technical problem of the brake chamber of the brake cylinder with too much oil return back pressure in the prior art

Method used

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  • Brake control device and crane
  • Brake control device and crane
  • Brake control device and crane

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Embodiment Construction

[0043] Below through the accompanying drawings Figure 2 ~ Figure 4And by way of listing some optional embodiments of the present invention, the technical solution (including the preferred technical solution) of the present invention is further described in detail. It should be noted that: any technical feature in this embodiment (the technical features can be separated by any punctuation marks such as commas, periods, commas or semicolons), and any technical solution is a variety of optional technical features or One or several of the optional technical solutions, for the sake of brevity in description, it is impossible to list all the alternative technical features and alternative technical solutions of the present invention in this document, and it is not convenient for the implementation of each technical feature It is emphasized that it is one of multiple optional implementation modes, so those skilled in the art should know: any technical feature and any technical scheme...

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Abstract

The invention discloses a brake control device and a crane, and relates to the technical field of engineering machinery. The technical problem that a brake containing cavity of a brake oil cylinder in the prior art is large in back pressure of the return oil is solved. The brake control device comprises a brake oil cylinder, a control valve and a bypass oil way, wherein an oil return port on the brake containing cavity of the brake oil cylinder is connected with an oil box through the control valve; when the control valve is in a first state, the oil return port on the brake containing cavity of the brake oil cylinder is connected with the oil way in the oil box through the control valve, and when the control valve is in a second state, the oil return port on the brake containing cavity of the brake oil cylinder is not connected with the oil way in the oil box through the control valve; and the bypass oil way is connected between the oil return port on the brake containing cavity of the brake oil cylinder and the oil box in parallel, and the hydraulic oil flowing from the oil return port on the brake containing cavity of the brake oil cylinder can flow into the oil box through the bypass oil way. The crane comprises the brake control device provided by the invention. According to the brake control device and the crane, the back pressure of the return oil in the brake containing cavity of the brake oil cylinder is reduced.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a brake control device and a crane provided with the brake control device. Background technique [0002] Crane manufacturers at home and abroad usually prefer closed hydraulic control systems when designing hoist hydraulic systems for large tonnage cranes. Closed hydraulic control systems can also be referred to as closed systems for short. Large-tonnage winch closed hydraulic system usually consists of two-way hydraulic pump, two-way hydraulic motor, etc., and a charge pump is also set up to supply oil to the system and to open the brake. [0003] In the closed hydraulic control system, the oil inlet pipe of the hydraulic pump is directly connected to the oil return pipe of the actuator (such as a two-way hydraulic motor), and the hydraulic oil (or working fluid) is closed in the pipeline of the system. The main advantages of the closed hydraulic control system ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66D5/28
Inventor 单增海胡小冬靳亮
Owner XUZHOU HEAVY MASCH CO LTD
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