JPH08168293A - Method for connecting multi-shaft motor drive device - Google Patents

Abstract

PURPOSE: To reduce the man-hours required for the maintenance of a multi-shaft motor drive device by forming the cases of the motor drive devices constituting the device of extruded U-shaped aluminum materials and providing recessed and projecting sections on the contacting surfaces of the cases so that the projecting sections can be put in the recessed sections. CONSTITUTION: The cases 2 of motor drive devices constituting a multi-shaft motor drive device are formed of extruded U-shaped aluminum materials and recessed grooves and projections are respectively formed on the contacting surfaces of the cases 2 so that the projections can be put in the recessed grooves. Therefore, when a plurality of cases 2 are coupled in parallel with each other, a case group can be constituted when the projections are put in the recessed sections by sliding the projections and recessed grooves against each other. A control substrate 4 is housed in each case 2 by sliding the substrate 4 on the internal surface of the case 2 and fixed with screws. The cases 2 are fixed to a base 10 with screws 6 through grooves for fixing screw formed on a back plate 3 fixed to the rear ends of the cases 2. Therefore, the cases of the drive device can be separately removed without giving any influence to the other cases and the man-hours required for the maintenance of the driving device can be remarkably reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for connecting a multi-axis motor drive unit, which is formed by connecting a plurality of motor drive units each having a case having the same shape, and more particularly, The present invention relates to improvement of workability when attaching / detaching individual motor drive devices to / from a multi-axis motor drive device.

[0002]

2. Description of the Related Art Conventionally, a multi-axis motor drive device is often constructed by connecting motor drive devices having almost the same function. In this case, the parts shape of the drive device is standardized to drive the inexpensive multi-axis motor drive device. Care is taken to realize the device. Therefore, it is usual that the case of the envelope forming a part of this drive device is also manufactured in the same shape. Figure 6
Shows a connection method adopted in a conventional multi-axis motor drive device when the motor drive devices having such cases of the same shape are connected side by side. In FIG. 6, 21-
Reference numerals 1, 21-2 and 21-3 show respective axis motor drive devices in a multi-axis motor drive device having a three-axis configuration.
Is a case in which an aluminum plate is bent into a U shape, 2
3 is a back plate fixed to the case 22, 24 is a control board, 25 is a support, and 26 is a board spacer. Connection of each axis motor driving device is provided by integrally providing a male screw at one end of the support column 25 and the substrate spacer and a female screw at the other end,
First, the board spacer 26 is attached to the case 22, and then the control board 24 is fixed with the male screw of the column 25 and the female screw of the substrate spacer 26. Further, the case of the motor driving device 21-2 is fixed with the male screw of the substrate spacer and the female screw of the column 25. Fix it so that it is sandwiched. Similarly, the control board and columns are fixed in sequence, and the motor drive units for each axis are connected in parallel to form a multi-axis motor drive unit. Further, there is also adopted a method in which the support column 25 and the substrate spacer 26 are hollow and fixed with a fixing screw having a length corresponding to the number of axes. The multi-axis motor driving devices connected side by side in this manner are fixed to a predetermined mounting plate or the like using the groove for the fixing screw provided in the back plate 22.

[0003]

In the conventional multi-axis motor drive device adopting such a connecting method, since the side-by-side connection is carried out by fixing the screws by the columns or the substrate spacers, for example, the motor drive device 21-2 is connected. When a failure occurs and an attempt is made to dismantle and repair the motor drive unit 21-3 other than the repair target, it is necessary to disassemble the motor drive unit 21-3. As a result, a large number of man-hours are required for the maintenance work of the multi-axis motor drive unit. When the number increased, more man-hours were required for maintenance. Therefore, in the present invention, by improving the case shape of the conventional example, a connecting structure is provided in which a desired axis motor driving device can be easily pulled out and reattached from the multi-axis motor driving devices connected in parallel, and the number of maintenance steps is greatly reduced. The purpose is to realize the intended multi-axis motor drive device.

[0004]

In order to solve such a problem, according to the present invention, a driving method for a multi-axis motor drive device is provided, which comprises a plurality of motor drive devices having a case of the same shape connected side by side. The device case is formed of an aluminum extrusion into a substantially U-shape, and a concavo-convex part which can be fitted to each other is provided in the adjacent part of another case adjacent to the case
The structure is such that each axis motor drive device can be detachably connected while sliding.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall construction of a multi-axis motor drive device that implements the connection method according to the present invention. In FIG. 1, 1 is a multi-axis motor drive device, 2 is a case formed of aluminum extrusion material in a substantially U shape, 3 is a back plate, 4 is a control board, 5 is an input / output connector, and 6 is a drive device fixing screw. , 7
Is a front panel, 8 is a front panel mounting hole, 9
Is a front panel fixing screw, 10 is a drive device installation base, and 11 is a power supply device. In this figure, the power supply 11 is
It is omitted when a power supply circuit is provided for each axis motor drive device.

Case 2 used for each axis motor drive
Is formed in an approximately U-shape by an aluminum extrusion method, and a concave groove is provided on a surface where the cases abut each other, and a convex projection is provided on a mating surface with dimensions that can be fitted to each other. Therefore, when connecting multiple cases 2 side by side,
A case group can be constructed side by side simply by sliding this uneven part on the guide. Further, a groove for mounting and guiding the control board 4 is provided on the inner surface of the case 2, and the control board 4 is slid and housed in the case 2 and fixed at a predetermined position with a screw or the like not shown.

A back plate 3 is fixed to the rear end of the case 2, and the back plate 3 is fixed to the drive device installation base 10 with a fixing screw 6 through a groove for a fixing screw provided in the back plate 3. If any one of these shaft motor drive devices fails and needs to be separated from the drive device installation base 10, the fixing screw 6 is removed, and the fitting concavo-convex portion of the case 2 is slid out as a guide to pull out the other. The target motor drive device can be easily taken out without affecting the motor drive device.

2 and 3 are cross-sectional views of the case used in the first and second embodiments of the present invention, showing the shape of the uneven portion provided on the contact surface of the case. First of FIG.
In the cross-sectional view of the case used in the embodiment, 12 is a groove, 13
Is a convex protrusion, 14 is a board guide groove for guiding the mounting of the control board 4, 15 is a heat dissipation fin for dissipating heat of the power conversion element included in the control board 4, 2-1, 2-2, 2-3 are respectively A part of axis motor drive is shown. The concave groove 12 has the same shape as the convex projection 13 and is finished to have a slightly larger size, and the cases 2 of the motor drive devices 2-1, 2-2, 2-3 can be connected side by side and have mutual contact surfaces. It is possible to slide.

FIG. 3 shows a sectional view of a case used in the second embodiment, in which 16 is a trapezoidal groove forming a concave portion, 17 is a hook-shaped projection forming a convex portion, 2-1 'and 2-2. ', 2-
Reference numeral 3'denotes a part of each axis motor driving device. Similar to the first embodiment, the trapezoidal groove 16 has the same shape as the hook-shaped protrusion 17 and is finished to have a slightly larger size. One surface of the hook-shaped protrusion 17 is provided with an inclined surface similar to the trapezoidal groove 16 and is adjacent to the trapezoidal groove 16. It is designed to restrain the case 2'from falling off. By providing such a concavo-convex portion on the contact surface of the case 2 ', each case 2'of the motor drive devices 2-1', 2-2 ', 2-3'.
Can be connected side by side and can slide on each other at the contact surface.

FIG. 4 shows the shape of the back plate 3 attached to the rear end of the case 2 shown in FIG. The width of the back plate 3 is made approximately the same as the width of the case 2 as shown by the chain double-dashed line, but since this back plate 3 is also slid together with the case 2, the convex protrusions of the adjacent case are formed. It is necessary to avoid interference with 13. Therefore, the notch 18 that is slightly larger than the shape of the convex projection 13 is provided, and the back plate 3 can also slide together with the case 2. Further, the back plate 3 is provided with a plurality of fixing screw grooves 19 used when fixing each assembled shaft motor driving device to the driving device installation base 10. It is obvious that the back plate used for the case 2'shown in FIG. 3 can also obtain the same function by providing a notch in consideration of the shape of the hook-shaped projection 17.

FIG. 5 shows a back plate 3 integrated with the case 2 and a method of fixing these to the controller installation base 10. In this figure, the back plate 3 is fixed to the case 2 with countersunk screws 20, and in this state, the case 2 and the back plate 3 are integrated. Further, the fixing screw 6 is passed through the fixing screw groove 19 of the back plate 3.
Is screwed into a female screw 28 provided at a predetermined position of the control device installation base 10 to fix each axis motor drive device. On the contrary, if the fixing screw 6 of the motor drive device to be removed is removed, the case 2 and the back plate 3 integrated as described above can slide,
It can be removed without affecting the adjacent motor drive device.

FIG. 1 shows a method of attaching a front panel 7 to the entire surface of the multi-axis motor drive device 1 with a fixing screw 9. The front panel 7 is a decorative panel made of a thin plate, Although the present invention is attached for the purpose of dustproofing and has no direct effect on the present invention, considering the plate thickness thereof, it is also possible to have a function to reinforce the connection state of each axis motor driving device.

[0013]

As described above, according to the method of connecting a multi-axis motor drive device of the present invention, the drive device case is formed of aluminum extrusion material into a substantially U-shape, and the other case adjacent to the case is formed. Since the concavo-convex portions that can be fitted to each other are provided in the adjacent portions and the structure is such that they can be detachably connected while sliding for each axis motor drive device, it is possible to select a desired one from the side-by-side connected multi-axis motor drive devices. Since the axis motor drive device can be easily pulled out and reattached, it is possible to provide a multi-axis motor drive device that significantly reduces maintenance man-hours.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a multi-axis motor drive device that implements a connecting method according to the present invention.

FIG. 2 is a diagram showing the shape of the concavo-convex portion of the case used in the multi-axis motor drive device that realizes the first embodiment of the present invention.

FIG. 3 is a diagram showing a shape of a concavo-convex portion of a case used in a multi-axis motor driving device that realizes a second embodiment of the present invention.

FIG. 4 is a diagram showing a shape of a back plate of the motor drive device.

FIG. 5 is a diagram showing a method of fixing the back plate of the motor drive device.

FIG. 6 is a diagram showing a method of connecting a multi-axis motor drive device according to a conventional example.

[Explanation of symbols]

 1 Multi-axis motor drive device 2, 2'Case 3 Back plate 4 Control board 6 Fixing screw 7 Front panel 10 Control device installation base 12 Recessed groove 13 Convex protrusion 16 Trapezoidal groove 17 Hook-like protrusion 18 Notch 19 For fixing screw Groove 20 Flat head screw 28 Female screw

Claims (1)

[Claims] 1. A method of connecting a multi-axis motor drive device comprising a plurality of motor drive devices having the same shape case connected side by side, wherein the drive device case is formed of aluminum extrusion into a substantially U-shape. A method for connecting a multi-axis motor drive device, comprising a concavo-convex part that can be fitted to each other in an adjacent part of another case adjacent to the case, and is detachably connected while sliding for each axis motor drive device.