Variable control valve structure, variable displacement motor and engineering machinery
A technology of variable control and variable motor, which is applied to servo motors, mechanical equipment, servo motor components, etc., can solve the problems of high structural cost and low reliability of variable control valves, achieve reduced oil circuit structure settings, high reliability, The effect of simple structure
Pending Publication Date: 2022-04-26
杭州力龙液压有限公司
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Problems solved by technology
[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of high cost and low reliability of the variable variable control valve structure in the prior art, thereby providing a variable variable control valve structure, variable variable motor and construction machinery
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[0024] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...
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The invention provides a variable control valve structure, a variable motor and engineering machine.The variable control valve structure comprises a valve sleeve, a valve element and an electric driving part, and a first oil port and a second oil port are formed in the valve sleeve; the valve element is movably arranged in the valve sleeve, the valve element comprises a first section and a partition section, the first section is arranged in the valve sleeve in a spaced and sleeved mode to form an oil guide cavity, the oil guide cavity communicates with the first oil port, and the partition section is configured to move along with the valve element so as to partition or communicate the oil guide cavity and the second oil port; the electric driving piece is connected with the valve element so as to drive the valve element to move. According to the structure, displacement switching is achieved in an electric control mode and is quicker and more stable, oil way structure arrangement can be reduced, the machining cost is reduced, and the defects that in the prior art, a variable control valve is high in structure cost and low in reliability are overcome.
Description
technical field [0001] The invention relates to the technical field of hydraulic components, in particular to a variable variable control valve structure, variable variable motor and engineering machinery. Background technique [0002] At present, the main hoisting action of construction machinery such as domestic truck cranes or crawler cranes is the lifting and lowering of heavy objects. Among them, the speed of lifting and lowering is divided into high speed and low speed. The high and low speeds are realized by switching the displacement of the motor. Therefore, the structure of the control valve that controls the switching of the displacement of the motor is particularly important. [0003] With the demand of the construction machinery market, customers have higher and higher requirements on the cost, reliability and smoothness of switching between high and low speeds of hoist motors. However, the variable control valve structure in the prior art often adopts a hydraul...
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IPC IPC(8): F15B13/02F15B11/042B66C13/20F16K1/00F16K1/32F16K1/36F16K31/04F16K31/44
CPCF15B13/021F15B11/0426B66C13/20F16K1/00F16K1/32F16K1/36F16K31/04F16K31/44
Inventor 李晗李新峰叶清
Owner 杭州力龙液压有限公司