JPH01144475U

JPH01144475U -

Info

Publication number: JPH01144475U
Application number: JP4155088U
Authority: JP
Priority date: 1988-03-29
Filing date: 1988-03-29
Publication date: 1989-10-04

Description

[Brief explanation of the drawing]

第１図は本考案に係るポンプ装置の一実施例を
示す構成説明図、第２図はピストンの回り止め手
段の一態様を示す断面図、第３図は回転体とピス
トンの各対向端面に設けられる永久磁石の配置例
を示す説明図、第４図は吐出弁の他の配置例を示
す説明図、第５図は本考案のポンプの他の使用状
態を示す説明図、第６図は本考案の他の実施例を
示す構成説明図、第７図は第６図のポンプ装置の
回転体に設けられる永久磁石の極性配置の一例を
示す説明図である。１……シリンダ装置、２……モータ、４……シ
リンダ、５……フリーピストン、１６……回転体
、２２……永久磁石。 Fig. 1 is a configuration explanatory diagram showing one embodiment of a pump device according to the present invention, Fig. 2 is a cross-sectional view showing an embodiment of a piston rotation prevention means, and Fig. 3 is a diagram showing a configuration of a rotating body and a piston at opposite end faces. FIG. 4 is an explanatory diagram showing an example of the arrangement of the provided permanent magnets, FIG. 4 is an explanatory diagram showing another example of the arrangement of the discharge valve, FIG. 5 is an explanatory diagram showing another usage state of the pump of the present invention, and FIG. FIG. 7 is an explanatory diagram showing an example of the configuration of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Cylinder device, 2... Motor, 4... Cylinder, 5... Free piston, 16... Rotating body, 22... Permanent magnet.

Claims

[Scope of Claim for Utility Model Registration] (1) A piston is housed in a cylinder that is provided with a suction valve and a discharge valve in or near the cylinder head so as to be able to reciprocate and not rotate. A motor is provided nearby with its output shaft oriented in the axial direction of the cylinder, and a rotary body is fixed to the motor output shaft so as to be close to the cylinder tail and face the end face of the piston. A pump device characterized in that permanent magnets are provided on opposing surfaces of the body and the piston, with N poles and S poles arranged alternately in the circumferential direction. (2) A piston is housed in a cylinder that is provided with a suction valve and a discharge valve in or near the cylinder head so as to be able to reciprocate, and a motor is installed near the outside of the cylinder, and the output shaft is aligned with the axis of the cylinder. A rotating body is fixed to the motor output shaft so as to be close to the cylinder tail and facing the end face of the piston, and a permanent magnet is attached to the outer periphery of the rotating body so that the N and S poles are arranged in a circle. 1. A pump device characterized in that the permanent magnets are arranged alternately in the circumferential direction and one or more permanent magnets are provided on the end face of the piston so that different poles are not directed in the same direction.