JPH03256640A - Slide unit for driving motor - Google Patents

Abstract

PURPOSE:To simplify the structure of a driving unit part, to simplify the structures of wiring, piping, etc., as well and to enable even the adjustment of an individual driving unit, by fitting the control unit of a motor which drives a screw shaft with its rotation to a frame. CONSTITUTION:A stepping motor 12 is fitted to a frame 11 and the output shaft thereof is connected to a screw shaft 13. A slide nut 15 is set with its assembly to the screw shaft 13, the nut 15 is stationally fitted to the slide rail 16 of a linear guide and the rail 16 is supported freely movably by the bearing 17 set to the frame 11 with its fitting integrally. The slide rail 16 is controlled with its movement linearly by the rotation of the stepping motor 12. A control unit 18 is integrally fitted to the frame 11. The actuation confirmation can be performed with the unit simple substance because of the control unit and driving unit being composed in an integral type.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is used, for example, in a robot device, etc., to control the movement of processing jigs, tables, etc. to predetermined positions. This invention relates to a motor-driven slide unit that moves a slider to a position and stops it.

[Prior Art] As means for controlling the movement of a slider, a cylinder drive system, a drive system using a DC or AC servo motor and a screw, and a cam drive system are known. However, although the drive system using cylinders can be configured at a relatively low cost, multi-point stop control is difficult. Furthermore, in the method using a cam, the body size is large compared to the moving stroke amount, and the range of application is limited.

Further, in such a slider movement control means, the DC
Or, with a drive system using an AC servo motor and screws,
The control unit is configured separately from the drive unit part, and the control unit is configured to separate the detection signal from the sensor mechanism (for determining the drive operation state, etc.) set in the drive unit part. The control unit section sends operation commands to the drive unit. Therefore, the wiring between the drive unit and the control unit or the piping in the cylinder drive method becomes long, resulting in a complicated configuration. When the conventional drive unit and control unit are configured separately, the drive unit cannot be adjusted independently.

[Means for Solving the Problems] In the motor-driven slide unit according to the present invention, the screw shaft is rotated by a motor, such as a stepping motor, whose drive is controlled by specifying the rotation direction and rotation angle, A nut mechanism screwed onto this screw shaft is moved linearly. In this case, this nut is connected to a slide rail installed on a linear guide mechanism, and the control unit for the motor is attached to a frame in which these guide mechanisms and the like are installed and set.

Problems to be Solved by the Invention] In view of the above-mentioned points, the present invention integrates a drive unit and a control unit to simplify the complicated configuration of the drive unit, and in particular, to simplify wiring. ,
The present invention aims to provide a motor-driven slide unit in which the configuration of piping and the like is simplified and adjustment can be made by the drive unit alone.

[Function] According to the motor-driven slide unit configured in this way, when the slide rail is driven by specifying the rotation direction and rotation angle of the motor, the slide rail moves linearly in response to the operation of the motor. controlled. Then, the controlled object can be moved and set to any desired position. In this case, since the control unit is integrally assembled to each drive unit, the wiring, piping, etc. are simplified, and furthermore, each unit can be adjusted easily.

[Embodiments of the invention] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a partially cutaway view of the structure, in which a stepping motor 12 serving as a driving source is attached to a frame 11. The output shaft of this stepping motor 12 is
Although details are not shown, it is connected to a screw shaft 13 via a coupling mechanism, and is driven by a stepping motor 12.
The rotation of the screw shaft 13 is controlled. Here, the screw shaft 13 is configured, for example, as a trapezoidal screw having a thread with a trapezoidal cross section, and is rotatably held by a bearing holder 14.

A slide nut 15 is installed in the screw shaft 13, and this nut 15 is attached to the slide rail 1 of the linear guide.
6 is fixedly attached. This rail 1B is
It is integrally attached to the frame j1 and is movably supported by a set bearing I7, and the sliding plate 6 is moved linearly along the bearing 17 without rotating. Supported by

The mechanism using the bearing 17 that supports the slide rail 16 of this linear guide is set parallel to the screw shaft I3, and when the screw shaft 13 is rotated, the slide nut 15 is moved along the screw shaft 13, and the slide Rail I
6 is also moved together, and this slide rail 16 is coupled to an output actuator or the like.

That is, by rotating the stepping motor 12, the slide rail 16 of the linear guide is controlled to move linearly, and the moving direction and moving distance are as follows.
It is determined by the rotation direction and rotation angle amount of the stepping motor 12.

A control unit 18 is further integrally attached to the frame 11. FIG. 2 shows an example of the configuration of the control unit 1B, and the control unit 18 has a built-in sequence function as well as a control function for the motor 12. The control unit 18 receives detection signals from the sensors 20 as well as operation commands from, for example, a personal computer 21, and controls the rotation of the motor 12 based on a slide command corresponding to the operation command.

Previously known equipment consists of a mechanical unit and a control unit that controls it, and these are managed separately.When assembling such equipment, the mechanical unit and control unit The mechanical unit cannot be adjusted to drive until both are completed.

However, according to the slide unit shown in the embodiment, once one mechanical unit in the equipment is completed, the drive can be adjusted for each completed unit without waiting for the entire equipment to be completed.

That is, the drive is controlled for each mechanical unit, and assembly and adjustment can be performed for each mechanical unit. Therefore, adjustment and assembly of equipment can be performed quickly and smoothly.

Here, using the pulse motor 12 as a drive source can reduce costs when position control is required. However, this motor 12 does not have to be a pulse motor, and may be an induction motor or a servo motor, for example. Further, the screw shaft 13 does not need to be a trapezoidal screw, and may be configured as a ball screw. Furthermore, the linear guide 1B can also be composed of a shaft and a bearing.

[Effects of the Invention] As described above, according to the motor-driven slide unit according to the present invention, the rail of the linear guide used as a guide for sliding movement is moved, and work is thereby done. . Moreover, according to this slide unit, the control unit and the drive unit are integrally configured. This makes it possible to check the operation of a single mechanical unit. Conventionally, it could only be operated by connecting it to a sequencer, but with a control unit equipped with a sequence function, it can be made smaller and integrated into the tail of the machine. is possible. In other words, it is possible to adjust the unit as a single unit, and it is also possible to shorten the length of wiring and piping, etc., and it is possible to achieve the purpose of simplifying the configuration and adjustment as well as simplifying maintenance.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway diagram showing the configuration of a motor-driven slide unit according to an embodiment of the present invention, and FIG. 2 is a diagram showing the configuration of a control unit used in the above. . 11... Frame, 12... Stella Pink Motor,
13...Screw shaft, 15...Slide nut, 16.
...Linear guide rail, Iγ...Bearing, 1
B...control unit. Figure 1

Claims (1)

[Scope of Claims] A motor whose drive is controlled by specifying the rotation direction and rotation angle; a screw shaft whose rotation is controlled by this motor; a nut mechanism whose movement is controlled in a linear manner, a linear guide mechanism set to extend in a direction coinciding with the direction of movement of the nut mechanism, and a slide movably supported by the guide mechanism and connected to the nut mechanism. A motor-driven slide unit comprising: a control unit that is attached to a frame into which the motor, the linear guide mechanism, etc. are incorporated and set, and has a sequence function for controlling the motor.