JPH01158841U

JPH01158841U -

Info

Publication number: JPH01158841U
Application number: JP6020788U
Authority: JP
Priority date: 1987-12-23
Filing date: 1988-05-06
Publication date: 1989-11-02

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係る過負荷検出装
置を有する電動シリンダの正断面図、第２図はこ
の装置をその左側面側から見た時の過負荷検出部
の構成を示す部分拡大図、第３図は第２図Ａ―Ａ
線断面の構成を示す断面図、第４図は本考案の他
の実施例を示す構成説明図、第５図は従来の過負
荷検出装置の構成を示す正断面図である。図中１はモータ、１０，５０はネジ軸、１５は
作動部材、６はアイドルギア、１８，３２，３３
，５２はスプリング、２５ａ，２５ｂ，３８，３
９，５３ａ，５３ｂはリミツトスイツチを各示す
。 Fig. 1 is a front sectional view of an electric cylinder having an overload detection device according to an embodiment of the present invention, and Fig. 2 is a portion showing the configuration of the overload detection section when this device is viewed from the left side. Enlarged view, Figure 3 is Figure 2 A-A
FIG. 4 is a cross-sectional view showing the configuration of a line cross section, FIG. 4 is a configuration explanatory diagram showing another embodiment of the present invention, and FIG. 5 is a front sectional view showing the configuration of a conventional overload detection device. In the figure, 1 is a motor, 10, 50 is a screw shaft, 15 is an operating member, 6 is an idle gear, 18, 32, 33
, 52 are springs, 25a, 25b, 38, 3
9, 53a, and 53b indicate limit switches.

Claims

[Claims for Utility Model Registration] (1) In an electric cylinder that applies thrust to the outside by rotating a screw shaft driven by a motor and causing an operating member screwed to the screw shaft to slide back and forth in the axial direction of the screw shaft. , power is transmitted from the motor to the screw shaft by a gear train including an idle gear, of which the rotatable shaft of the idle gear is supported slidably in a direction perpendicular to the shaft; Preload is applied to the shaft by a spring so as to suppress sliding of the shaft, and when the shaft of the idle gear moves a certain distance against this preload, the operation of the motor is controlled by a limit switch. An electric cylinder overload detection device featuring: (2) The shaft of the idle gear is rotatably supported by a shaft holding mechanism, and the shaft holding mechanism is installed to be slidable in a direction perpendicular to the shaft so that the shaft can be slid in the direction perpendicular to the axis. The overload of the electric cylinder according to claim 1 of the registered utility model claim, characterized in that the sliding of the shaft can be suppressed by applying a preload by the spring to the shaft holding mechanism. Detection device. (3) A request for registration of a utility model characterized in that sliding of the shaft of the idle gear is suppressed by applying a preload to the shaft of the idle gear from both sides in the sliding direction using springs, respectively. An overload detection device for an electric cylinder according to the first and second terms.