Power output unit for hand-held hydraulic power accessories
A technology of power output and pressure compensation, which is applied in the direction of fluid pressure actuators, servo motor components, mechanical equipment, etc., can solve the problems of hydraulic system incompatibility, etc., and achieve the effect of flexible installation, low cost and small size
Active Publication Date: 2015-07-15
ZHEJIANG UNIV
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Problems solved by technology
[0004] In order to overcome the problem of incompatibility between the existing power output unit and the hydraulic system on the existing engineering vehicle, the present invention provides a power output unit that can easily output power from the existing quantitative pump system and load-sensitive pump system to meet various requirements. The power output unit of a hand-held hydraulic power attachment that meets the needs of a variety of hand-held hydraulic attachments
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[0022] refer to figure 1 , the power output unit of the hand-held hydraulic power attachment, including a load-sensing valve 1, a first steady flow throttle valve 2, a high-pressure low-flow power output oil circuit A, and a low-pressure high-flow power output oil circuit B. The high-pressure low-flow power The output oil circuit A and the low-pressure high-flow power output oil circuit B are respectively connected to the hand-held power attachment;
[0023] The high-pressure low-flow power output oil circuit A includes a first pressure compensation valve 3, a first LS relief valve 4, a first solenoid valve 5, a relief valve 9, a second steady flow throttle valve 11, a first throttle The valve 10 and the first one-way valve 12; the load sensing valve 1 communicates with the oil inlet P, the oil return port T, the LS port and the first steady flow throttle valve 2; the first steady flow throttle Flow valve 2 is connected with load sensing valve 1, LS port, and oil return port ...
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The invention discloses a power output unit for hand-held hydraulic power accessories. The power output unit comprises a load-sensitive valve, a first steady-flow throttling valve, a high-pressure low-flow-rate power output oil way and a low-pressure high-flow-rate power output oil way, wherein the high-pressure low-flow-rate power output oil way and the low-pressure high-flow-rate power output oil way are connected with the hand-held power accessories respectively. The power output unit is mainly used for providing hydraulic power for the hand-held power accessories of two kinds of pressure and flow rate characteristics in quantitative pump systems and load-sensitive pump systems, wherein the hand-held power accessories comprise the high-pressure low-flow-rate hand-held hydraulic accessories and the low-pressure high-flow-rate hand-held hydraulic accessories. When the power output unit is used for the quantitative pump systems, a load-sensitive (LS) opening of the power output unit is plugged by a plug. When the power output unit is used for the load-sensitive pump systems, the LS opening of the power output unit is communicated with LS openings of load-sensitive pumps. The power output unit is flexible, can be embedded into a hydraulic system of a whole machine, can be expanded into a plurality of passages and is low in cost, small in size and flexible to install.
Description
technical field [0001] The invention relates to a power output unit of a hand-held hydraulic power attachment. Background technique [0002] At present, some engineering vehicles need to be equipped with some hand-held power attachments to achieve refined operations in complex rescue sites and demolition sites. However, there are currently a wide variety of applications and types of hand-held hydraulic power attachments, such as hydraulic tongs, hydraulic shears, jackers, expanders, chain saws, entrenched and so on. These hand-held power attachments must be equipped with a power station separately to provide power, but this power station is mostly an independent device. [0003] When this independent device is used in the engineering vehicle field, it cannot be integrated with the hydraulic system of the engineering vehicle, and cannot use the existing hydraulic power source as its power. Therefore, it is necessary to invent a power output unit that can use the existing pu...
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IPC IPC(8): F15B13/02
Inventor 徐兵范东葛耀铮程敏
Owner ZHEJIANG UNIV