Volume adjustable fluid pump

Abstract

A variable displacement pump comprising an outer housing (10, 30), a drive space (12) being formed in the interior thereof. A swash plate (35) is positioned in the drive space (12) and mounted in such a way as to allow rocking centered on brackets (34), and adjustment of the angle of inclination of an inclined surface (36). A cylinder block (50) is mounted in the drive space (12) and rotates under the action of a drive shaft (90), multiple cylinder holes (55) being formed in the interior of the block and extending in a direction parallel to the drive shaft (90). A piston assembly (70), at least a portion whereof is inserted into the cylinder holes (55) of the cylinder block (50), moves rectilinearly therein while rotating along with the cylinder block (50). A retainer plate (80), being connected to the piston assembly (70) and holding same close to the inclined surface (36) of the swash plate (35), rotates along with the piston assembly (70). An incline adjustment part (100) passes through the outer housing (10, 30) and is extendable and retractable within the drive space (12), and one side thereof, when inserted into the interior of the drive space (12), is used to push the bottom surface of the swash plate (35) and thereby adjust the angle of inclination of same.

Description

technical field [0001] The present invention relates to a fluid pump, in particular to a fluid pump capable of adjusting the inclination angles of a swash plate and a disk retaining ring installed on the swash plate by using an inclination adjustment part, thereby adjusting fluid pressure based on a piston . Background technique [0002] Common fluid pumps such as hydraulic pumps operate by utilizing phase changes that occur when a swash plate (Swash Plate) inclined on one side rotates. Next, its structure will be briefly explained. The piston is connected to the retaining ring by a piston shoe for generating fluid pressure through a linear moving action inside the cylinder. The circlip is used to stop the piston slipper and because the circlip is against the swashplate, it ultimately allows the piston to be snug against the swashplate. At this time, because the retaining ring is connected to the cylinder through the medium of the piston, the retaining ring will also rota...

AI Technical Summary

Problems solved by technology

[0005] However, in the existing capacity-adjustable swash plate pump, the structure for adjusting the inclination angle of the swash plate is relatively complicated.

For example, it is necessary to provide a separate drive unit for adjusting the rotation angle of the swash plate, and it is also necessary to provide a feedback mechanism for maintaining the state of the rotation angle after the change, which leads to the problem of an increase in the number of overall parts and manufacturing cost

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