Hydraulic variable pump set and excavator
AssigneesWeichai Power Co., Ltd., Linde Hydraulics (China) Co., Ltd.
InventorsKai CUI, Xuxin QIN, Guoxi YANG, Fei YANG
Life of this patent
Estimating the term…
Abstract
Provided is a hydraulic variable pump set, including a pump body component and an oil supplement component. The pump body component includes a pump body, a first slide valve, and a first control valve. The first slide valve includes a spring end and a pilot cavity. The first control valve is provided with an oil inlet A, an oil inlet B, and an oil outlet T. The pump body includes a variable pump and a variable cylinder. The variable pump includes a swash plate. The variable cylinder includes a rod cavity and a rodless cavity. The variable cylinder is mechanically connected to the spring end and the swash plate. The oil supplement component is in communication with the pilot cavity.
Claims20
A hydraulic variable pump set, comprising a pump body component and an oil supplement component, wherein the pump body component comprises a pump body, a first slide valve, and a first control valve, wherein the first slide valve comprises a spring end and a pilot cavity, and the first control valve is provided with an oil inlet A, an oil inlet B, and an oil outlet T;
- the pump body comprises a variable pump and a variable cylinder, wherein the variable pump comprises a swash plate, the variable cylinder comprises a rod cavity and a rodless cavity the variable cylinder is mechanically connected to the spring end and the swash plate, and the oil supplement component is in communication with the pilot cavity;
- and
- the variable pump is in communication with the oil inlet A of the first control valve, the oil supplement component is in communication with the oil inlet B of the first control valve, the oil outlet T of the first control valve is in communication with the rod cavity, and the rodless cavity is in communication with the oil outlet T of the first control valve through the first slide valve.
An excavator, comprising a hydraulic variable pump set, wherein the hydraulic variable pump set comprises a pump body component and an oil supplement component, wherein the pump body component comprises a pump body, a first slide valve, and a first control valve, wherein the first slide valve comprises a spring end sod a pilot cavity, and the first control valve is provided with an oil inlet A, an oil inlet B, and an oil outlet T;
- the pump body comprises a variable pump and a variable cylinder, wherein the variable pump comprises a swash plate, the variable cylinder comprises a rod cavity and a rodless cavity, the variable cylinder is mechanically connected to the spring end and the swash plate, and the oil supplement component is in communication with the pilot cavity;
- and
- the variable pump is in communication wife the oil inlet A of the first control valve, the oil supplement component is in communication with the oil inlet B of the first control valve, the oil outlet T of the first control valve is in communication with the rod cavity, and the rodless cavity is in communication with the oil outlet T of the first control valve through the first slide valve.
Dependencies are inferred from the claim text.