Rotary-type valve device

Abstract

The invention provides a rotary-type valve device capable of reducing the number of components, achieving size reduction of the device, improving vehicle mounting properties, and the like. The rotary-type valve device is provided, and includes: a tubular valve having an inner passage and opening parts opened in an outer circumferential wall and rotating about a predetermined axial line; a shaft rotating integrally with the valve; a housing accommodating the valve, supporting the shaft to be able to turn, and defining a communication port causing the inner passage to communicate with outside; a passage member assembled in the housing such that that the passage member abuts on an outer circumferential wall of the valve and defining a radial-direction passage. The valve includes a recessed part recessing inward in the axial line direction and surrounding one end part of the shaft. The housing includes a tube part inserted into the recessed part and supporting the one end part and a support hole supporting the other end part of the shaft.

Description

technical field [0001] The present invention relates to a rotary valve device for opening and closing a fluid passage by rotating a valve around an axis, and more particularly to a rotary valve device suitable for controlling the flow of cooling water of an engine mounted on a vehicle or the like. Background technique [0002] As a conventional rotary valve device, a cooling water control valve device including the following parts is known: a casing having a cylindrical portion through which cooling water can flow inside; a cylindrical valve having an opening on the outer wall and rotating around the axis Rotation; the metal main shaft is fitted and fixed to the valve and is elongated on the axis; the cylindrical sealing member is interposed between the valve and the case and abuts against the outer peripheral surface of the valve; and the motor rotates the valve drive (for example, refer to Patent Document 1). [0003] In the above device, the main shaft is formed so as to...

AI Technical Summary

Problems solved by technology

[0004] In this structure, the size of the case in the axial direction of the main shaft becomes large, resulting in an increase in the size of the device.

Therefore, when the device is mounted on a vehicle-mounted engine, it is disadvantageous in terms of vehicle mountability.

[0005] In addition, the valve, the main shaft, and the bearings supporting both ends of the main shaft are formed as independent parts, so the number of parts is large and the structure is complicated, which is disadvantageous in terms of assembly and management costs.

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