JPS6386384U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of essential parts showing one embodiment of the oil pump flow rate control device according to this invention, FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 4 is a sectional view showing a conventional flow rate control device, and FIG. 5 is a sectional view taken along the line -- in FIG. 4. DESCRIPTION OF SYMBOLS 1... Housing, 2... Valve accommodation chamber, 3... Discharge passage, 4... Suction passage, 5... Valve body, 8... Relief spring, 10... Annular groove, 21... Passage groove.

Claims (1)

[Scope of utility model registration request] A housing having a valve accommodating chamber therein is formed with a discharge passage that opens approximately axially to the valve accommodating chamber, and a suction passage that opens approximately radially to the valve accommodating chamber, and a suction passage that opens approximately radially to the valve accommodating chamber. A valve body for closing the discharge passage is slidably housed in the housing chamber under axial biasing by a relief spring, and an annular groove communicating with the suction passage is formed in an inner wall of the valve housing chamber. When the discharge pressure in the discharge passage exceeds a set value, the valve body is moved in the axial direction against the spring force of the relief spring, and the discharge passage and the suction passage are connected through the annular groove. A flow rate control device for an oil pump that communicates with the discharge passage and circulates a part of the fluid in the discharge passage toward the suction passage, wherein a plurality of passage grooves that communicate with the annular groove are formed on an inner wall of the valve housing chamber on the discharge passage side. A flow control device for an oil pump, characterized in that the flow rate control device is formed along the axial direction.