JPS5850351A - External drive type straight lined operation machine - Google Patents

Abstract

PURPOSE:To enable a plurality of straight lined operation machines to be easily operated in synchronization with each other without any special devices by connecting mechanically them to a drive source. CONSTITUTION:A flap 2 is operated by running in parallel two straight lined operation machines 3, 4 driven by a motor 5. Namely, connecting pins in the upper connections 6 of respective operating rods 20 and input shafts 12 in two straight lined operation machines 3, 4 are mounted in parallel to the axis of the flap 2, and the respective input shaft 12 are connected to a rotary shaft of the motor 5 through a transmitting shaft 7 and a flexible coupling 8. The input shafts 12 of the respective straight lined operation machines 3, 4 are driven through the drive shaft of the motor 5 to vertically move the operating rods 20 synchronously.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mechanical linear actuator that is driven from an external fixed drive source via a transmission shaft, in which the point of action is guided by a rotating body or a curved guide groove. The present invention provides a linear actuator that drives an actuated body that moves in a curve.

More specifically, a linear actuator connected to a rotating body or the like is configured to tilt about the input shaft in accordance with the rotation angle of the rotating body or the like (hereinafter simply referred to as the rotating body).

A special transmission device is required to operate a rotating body with a hinge, such as a door or flap, or a temporary rigid body that moves while being guided by a curved guide groove, etc., using an externally driven linear actuator.
゜The present invention requires special equipment even in parallel operation when two or more linear actuators are installed for large rotating bodies or rotating bodies that require force application points to be provided at two or more locations. The present invention provides a linear actuator for driving a rotary body that can easily perform synchronous operation without any problems.

The invention will be explained below with reference to the figures.

FIG. 1 is a longitudinal cross-sectional view of a linear actuator according to the present invention, where 0.sup.1 is a gearbox α1) located on the fixed side of the actuator, and is a cylindrical bearing portion projecting from side to side. Reference numeral 04 denotes an input shaft that is supported by penetrating through the center of the bearing part, and at least one of the input shafts protrudes to the outside as a connecting part (12a).

[31 is a bevel gear, which is engaged with a bevel gear (16) that is pivotally attached to the lower end of the screw shaft 05).

A cylinder 01 is provided upright in the upper opening of the gearbox via the bracket side, and an operating rod is slidably accommodated therein.

The intermediate portion of the screw shaft αω is supported by a thrust bearing Oa within the bracket (17), and a screw portion (15a) ZZ is provided above the support portion.
15a) is screwed into the nut rule fixed to the lower end of the operating rod (2iυ).

(2) The cylindrical bearing portion aυ of the gearbox shown in σ rotatably supports the shaft hole on the fixed member side (the gearbox 00 is fitted and supported by 221 and serves as a kind of trunnion).

When the screw shaft 0 rotates, the operating rod (2 [1) expands or shortens, and the connecting portion (6) moves up and down. In this case, even if the tip connecting portion is displaced in a curve, the operating rod and cylinder (1 !
j can easily follow the rotation of the gearbox's cylindrical bearing portion 0υ, and therefore the input shaft θ, as the rotation center by ↓. Since this rotation is about the input shaft Q, smooth rotation continues without any hindrance to power transmission.

The linear machine 1IlIJ of the present invention exhibits particularly characteristic effects when two or more machines are operated in parallel, and an example of the installation relationship is shown in FIGS. 2 and 3.

In the embodiment shown, the flap (2) is connected to one electric motor (
Two linear actuators (3) driven by (5) (4)
1 in parallel operation.

J4J, the connecting pin (6a) of the upper end connecting part (6) of the operating rod (a) of each of the two linear actuators and the input shaft are as follows:
It is mounted parallel to the pivot axis (1) of the flap, and each input shaft is connected to the rotating shaft of an electric motor (5) via a transmission shaft (7) and a flexible coupling (8). In addition, when removing the top, the threads of the screw shafts of the linear actuators (3) and (4) are in opposite directions.

The input shaft of each linear actuator is driven through the drive shaft of the electric motor, and each screw shaft automatically expands and contracts in synchronization.

The input shafts of each linear actuator are on the same axis, so power transmission continues regardless of the rotation angle of the flap, and the rotation angles of each actuation rod automatically match.

According to this device, each actuator is mechanically connected to one drive source, so complete synchronization can be achieved, and the entire operation is tilted around the input shaft, so the power transmission efficiency can be adjusted depending on the tilt angle. Based on external power fluctuations that do not change and have no power loss.
It has advantages such as not generating vibration.

In the device of the present invention, the installation position of the rotary drive source and the direction of the rotation axis are arbitrary.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of a linear actuator according to the present invention, FIG. 2 is an external front view in parallel operation, and FIG. 3 is a side view thereof. (10) is gear box, 01) is cylindrical bearing part, α3 is input shaft O

Claims (2)

[Claims] (1) In a linear actuator in which an actuating rod that is connected to an actuated body through a connecting pin is threadedly engaged with a screw shaft, and the screw shaft is rotated by an external drive source, a gear box is installed on the fixed side of the actuator. A pair of cylindrical bearings protruding from both sides of the cylindrical bearings, a mounting fixing member rotatably fitting and supporting the cylindrical bearings, and an input shaft supported through the center of the cylindrical bearings. An externally driven linear actuator, wherein the screw shaft and the input shaft are connected to each other by a bevel gear, and the linear actuator itself rotates about the cylindrical bearing part. (2) The externally driven linear actuator according to claim 1, wherein the connecting bin and the input shaft are attached in parallel to the pivot of the rotating body.