JPH01209937A - Motor cylinder device - Google Patents

Abstract

PURPOSE:To freely set a linear motion and a rotary motion by moving a rotor axially by air supply means provided in a case and rotatably driving the rotor and a stator. CONSTITUTION:Since a rotor 12 rotates at a predetermined speed when a drive pulse current is supplied from leads 15 to a stator winding 4, a rotary shaft 2 secured with the rotor 12 is rotatably driven at the predetermined speed. Since the rotor 12 moves in either direction when air is supplied to air supply means 6 or 6A, the shaft 2 is linearly moved axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Industrial Application Field The present invention relates to a motor cylinder device, and in particular to a motor cylinder device for having a rotating shaft capable of both axial movement and rotational movement. Concerning new improvements.

b. Conventional technology Various configurations have been adopted for this type of robot cylinder that have been used in the past, but the most typical configurations are shown in Figure 3. A published robot cylinder manufactured by THK can be disclosed.

That is, a rotating shaft 2 having a piston (not shown) is provided in a casing designated by the reference numeral 1 in FIG. 3, and the casing 1 has an air supply hole for moving the piston in the axial direction. 3 is formed.

Further, since the rotating shaft 2 and the piston are formed in the form of a nut, the rotating shaft 2 is connected to the screws through the air supply hole 3.・By moving the shaft, it was possible to move in the axial direction, and rotational motion of the rotary shaft 2 was obtained from linear motion.

c00 Problems to be Solved by the Invention The conventional robot cylinder was configured as shown below, and therefore had the following problems.

In other words, since rotational motion was obtained from linear motion using the relationship between a screw and a nut, the relationship between linear motion and rotational motion was determined to be one-to-one, and rotational motion and linear motion could be freely set. could not.

In addition, since the lead of the built-in nut is large, the piston may not operate if the supplied air pressure is low, making it impossible to obtain a fine, high-precision actuator.

The present invention has been made to solve the above-mentioned problems, and particularly provides a motor cylinder device that can have a rotating shaft that can perform both axial movement and rotational movement. The purpose is to

Means for Solving Problem d1 The motor cylinder device according to the present invention includes a case containing a stator, an air supply means provided in the case, and a bearing that allows the case to freely rotate and move in the axial direction. and a rotor provided on the rotary shaft and magnetically cooperating with the stator, the rotary shaft being moved in the axial direction by the air supply means and rotated at an arbitrary axial position. It has a configuration that allows it to be driven.

00 Operation In the motor cylinder device according to the present invention, by rotating the rotor based on the magnetic interaction with the stator, the rotating shaft can be rotationally driven at an arbitrary rotational speed.

Furthermore, by supplying air into the case through the air supply means provided in the case, the rotor can be moved to any axial position, and the rotating shaft can be moved again at this arbitrary axial position. The rotation can be driven.

Therefore, since the rotary shaft can be rotated while moving at an arbitrary stroke, the axial movement and rotational movement of the rotary shaft can be completely separated.

RO, EXAMPLES Hereinafter, preferred embodiments of the motor cylinder device according to the present invention will be described in detail with reference to the drawings.

Note that the same or equivalent parts as in the conventional example will be described using the same reference numerals.

FIGS. 1 and 2 are a side sectional view and a sectional view of essential parts of a motor cylinder device according to the present invention.

In the figure, a stator 5 having a stator winding 4 is provided on the inner surface of a case designated by reference numeral 1, which functions as a cylinder. A pair of air supply means 6 and 6A consisting of an air supply pipe 6a and a hose 6b for supplying or discharging air into the case 1 are screwed together.

Furthermore, bearings 9 made up of a plurality of balls 8 are provided in a pair of protruding holding parts 7 formed at the axial center position of the case 1, and these bearings 9 have a rotating shaft passing through the case 1. 2 is provided rotatably and movably in the axial direction.

The O-rings 11 provided in the shaft guide holes 10 of each of the protruding holding parts 7 are in close contact with the outer peripheral surfaces of both ends of the rotating shaft 2, and the inside of the case 1 is configured as a sealed cylinder.

A rotor 12 is integrally provided on the rotating shaft 2, and the rotor 12 and stator 5 drive a motor 13.
(for example, a step motor), and the length of this rotor 12 is configured to be shorter than the length L2 of the stator 5 by the stroke.

Further, as shown in FIG. 2, a filling material 13 is provided in each slot 5a of the stator 5 so that the rotor 12 can be moved in either the left or right direction by the air supplied by the air supply means 6. Filled.

Furthermore, a bush 14 formed on the wall of the case 1
A lead wire 15 introduced into the case 1 via the stator winding 4 is connected to the stator winding 4 .

The motor cylinder device according to the present invention is configured as described above, and its operation will be explained below.

First, by supplying a drive pulse to the stator winding 4 via the lead wire 15 described above, the rotor 12 rotates in a predetermined manner, so that the rotating shaft 2 can be driven to rotate in a predetermined manner.

Furthermore, when moving the rotating shaft 2 in the right or left direction in the axial direction, the rotor 12 has the action of a piston by supplying air to the air supply means 6 or 6A. is moved in the direction of
The rotating shaft 2 is moved in the axial direction.

Further, when the rotor 12 is moved in the axial direction by supplying air from the air supply means 6 or 6A, a slight gap 16 formed between the rotor 12 and the inner surface 5b of the stator 5
Since air flows through the rotor 12 and stator 5
heat generation is effectively suppressed.

g6 Effects of the Invention Since the motor cylinder device according to the invention is configured as described above, the following effects can be obtained.

(1) Since the rotor also functions as a piston, rotational motion and linear motion can be freely extracted from the rotating shaft.

(2) When the rotor is moved in the axial direction by supplying air pressure, the inside of the motor is cooled by the air flowing through the gap between the rotor and the stator, thereby preventing overheating.

(3) Since the six rotation axes are constructed with ball bearings, there is less friction than in conventional configurations, allowing for smooth linear motion.

(4) Since the length of the rotor is configured to be shorter than the length of the stator by the amount of the stroke, a large stroke can be achieved.

[Brief explanation of the drawing]

1 and 2 show a motor cylinder device according to the present invention, FIG. 1 is a side sectional view, FIG. 2 is an enlarged sectional view showing the main part of FIG. 1, and FIG. 3 is a conventional robot. It is a perspective view showing a cylinder. 1 is a case, 2 is a rotating shaft, 5 is a stator, 6°6 Aμ air supply means, 9 is a bearing, and 12 is a rotor. Figure 11112 --H Figure 2 Figure 3

Claims (1)

[Claims] A case (1) containing a stator (5), an air supply means (6, 6A) provided in the case (1), and rotation and axial movement in the case (1) via a bearing (9). a rotating shaft (2) that is freely configured; and the rotating shaft (2).
a rotor (12) provided in the rotor and magnetically cooperating with the stator (5), the rotating shaft (2) being moved in the axial direction by the air supply means (6, 6A);
A motor cylinder device characterized in that it is configured to be rotatably driven at any axial position.