JPS6116899Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for a moonving bolster used in a press machine.

In a conventional drive device of this type, a wheel supported by a moonbing bolster is connected to a motor and a speed reducer fixed to the bolster via a transmission shaft. However, due to its layout, the transmission shaft that transmits the torque of the motor to the wheels in this way has to be placed in a position where it is likely to interfere with other devices such as the bolster clamper. There was a drawback that the design and layout design of the entire moonving bolster were severely restricted.

This invention was made in view of the above, and
The purpose is to make the drive device more compact by essentially integrating the motor, reduction mechanism, and wheels, and to prevent interference with other devices and increase the degree of freedom in designing the moonving bolster layout. .

The present invention will be described below with reference to an illustrated embodiment.

In the figure, reference numeral 1 denotes a moonbing bolster, and a bearing portion 2 protruding from the lower surface of the moonbing bolster supports a wheel 4 via a bearing 3. When the Moonving Bolster 1 is positioned in the press machine,
The wheel 4 is supported by a lifter 5, and when the moonving bolster 1 is fixed to a press machine, the lifter 5 is lowered by hydraulic pressure, the wheel 4 is buried in the bed 6, and the moonving bolster 1 is supported by the bed 6. The baby is starting to settle down.

Reference numeral 7 denotes a motor fixedly attached to the bearing portion 2, and the output shaft 8 of this motor 2 and the wheel 4 are interlocked via a speed reduction mechanism 9 built into the wheel 4.

In this embodiment, a harmonic drive mechanism is adopted as the speed reduction mechanism 9, and a wave generator plug 13 is fixed to a rotating shaft 11 connected to the output shaft 8 via a key 10 via a key 12. . The wave generator plug 13 is formed to have an elliptical cross section, and a flex spline 15 is rotatably mounted on its outer peripheral surface via a wave generator bearing 14.
The flex spline 15 is made of an elastic material such as special steel, and the flex spline 15 is made of an elastic material such as special steel.
The wave generator bearing 14 is adapted to be deformed to conform to the elliptical outer circumferential surface of the wave generator bearing 14 fitted to the wave generator bearing 3 .

Further, a spline is formed on the outer peripheral surface of the flex spline 15, and the rotating circular spline 1 has splines formed on the inner diameter surface that engage with this spline at two locations (long axis portions of the ellipse).
6 and a fixing circular spline 17 are attached to the outer peripheral surface of the flex spline 15.
The inner diameters of both circular splines 16 and 17 are perfectly circular. Then, connect the rotating circular spline 16 to the wheel 4 with the bolt 18.
At the same time, the fixing circular spline 17 is fixed to the bearing part 2 with bolts 19.
The number of teeth of the rotating circular spline 16 is two more than the number of teeth of the flex spline 15, and the number of teeth of the fixed circular spline 17 is set to be the same as the number of teeth of the flex spline 15. .

In the above configuration, when the motor 7 is started,
The rotation of the output shaft 8 is transmitted through the key 10, the rotation shaft 11, and the key 12 to the wave generator plug 1.
3 can be conveyed.

When the wave generator plug 13 rotates, the flex spline 15
However, since this spline 15 is fixed to the bearing part 2 via the fixing circular spline 17, the flex spline 15 does not rotate, and due to the guiding action of the wave generator bearing 14. The long shaft portion that engages with both of the circular splines is rotated in the same rotational direction as the wave generator plug 13 at the same speed.

Here, the rotational circular spline 16
Although there is a difference in the number of teeth between the fixed circular spline 17 and the fixed circular spline 17, the long axis portion of the flex spline 15 is commonly engaged with both splines 16 and 17. Both circular splines 16 and 17 rotate relative to each other by the difference in the number of teeth. Also, fixing circular spline 1
7 is fixed to the bearing part 2, and the rotating circular spline 16 is fixed to the wheel 4, so both circular splines 1 due to the difference in the number of teeth
The rotating circular spline 16 is rotated in the same direction as the rotating shaft 11 at relative rotational speeds of 6 and 17.

Incidentally, the reduction ratio 1/R between the rotating shaft 12 and the rotating circular spline 16 is determined by the number of spline teeth of the rotating circular spline 16 being Z _CD , the number of teeth of the fixed circular spline 17 and the flexible spline 15 If the number is Z _CS , then 1/R=Z _CD -Z _CS /Z _CD =2/Z _CD , and if the number of teeth of both circular splines 16 and 17 is the same, the wheel 4 will not rotate.

Therefore, both the circular splines 16,1
By giving an appropriate difference to the number of teeth of the motor 7, the wheel 4 is rotated at a reduced speed as the motor 7 rotates.
Moonving Bolster 1 runs.

In the embodiment, the number of teeth of the fixed circular spline 17 is the same as the number of teeth of the flex spline 15, and the rotating circular spline 1
The number of teeth in No. 6 is increased by two more than the number of both teeth, but this is not necessarily limited to the embodiment. Alternatively, the reduction ratio may be changed by changing the difference in the number of teeth.

Further, in the embodiment, a harmonic drive mechanism is employed as the reduction mechanism, but other reduction mechanisms which are similarly compact and capable of increasing the reduction ratio may also be employed.

As explained above, according to the present invention, the speed reduction mechanism is built into the inside of the wheel, and the motor is attached to the bearing of the wheel, so there is no need to provide a long transmission shaft like in the past, and other There is no need to design the layout of the moving bolster in consideration of interference between the device and the drive device. or,
Since the speed reduction mechanism is built into the wheel and the drive device is directly attached to the wheel portion, the drive device is made more compact and can be easily mounted on the moving bolster.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts showing an embodiment of the present invention. FIG. 2 is a cross-sectional view taken from FIG. 1. 1...Moonving bolster, 2...Bearing part,
3...Bearing, 4...Wheel, 7...Motor, 8...
Output shaft, 9... Reduction mechanism, 11... Rotating shaft, 13
... Wave generator plug, 14 ... Wave generator bearing, 15 ... Flex spline, 16 ... Circular spline for rotation, 17 ... Circular spline for fixation.

Claims (1)

[Scope of utility model registration request] This is a drive device for a moonbing bolster used in a press machine, in which a wheel is pivotally supported on a bearing part protruding from the lower surface of the moonbing bolster, a motor is fixedly installed in each bearing part, and the motor is inserted into the wheel. A flex spline is rotatably attached to the outer peripheral surface of the wave generator plug connected to the built-in speed reduction mechanism and connected to the motor shaft via a wave generator bearing, and a rotating circular spline is fixed to the wheel. The speed reduction mechanism is configured with a harmonic drive mechanism in which a fixed circular spline fixed to a bearing portion is engaged with the outer peripheral surface of the flex spline, and the motor, speed reduction mechanism, and wheels are integrated. A moving bolster drive device.