JPH0140640Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slide stroke length variable press machine, and particularly to a stroke length adjusting device for a press machine having a plurality of points.

Stroke adjustment of variable slide stroke length presses, mainly in medium and large presses, is not possible with human power, so it is now performed by electric or hydraulic motors.

However, when there are multiple points, even if the stroke adjustment work for each point is linked and performed simultaneously, if one of the adjustment clutches slips, the stroke adjustment amount between each point will be different. Something happened.

If press work is performed under such conditions, the machine will be damaged.

The present invention has been made to solve these problems, and aims to provide a stroke length adjusting device that has a simple configuration and can match the adjustment amount at each point.

The configuration of the present invention will be explained below based on the drawings.

In the figure, 1 is a main shaft, and 2 is an eccentric drum rotatably fitted to the eccentric portion 3 of the main shaft 1. When the main shaft 1 rotates via a gear 4, the eccentric drum 2 is connected to the main shaft 1. This eccentric drum 2
A connecting rod 5 fitted into the connecting rod 5 is adapted to move up and down. Reference numeral 6 denotes a slide drum that is coaxially with and adjacent to the eccentric drum 2 and is spline-engaged with the main shaft 1 so as to be movable in the axial direction. Pawl clutches 7 are provided on both opposing sides of the .
A hydraulic chamber 8 is constructed between the slide drum 6 and the main shaft 1, and by supplying hydraulic pressure to this hydraulic chamber 8 through an oil hole 9 provided in the shaft of the main shaft 1, the slide drum 6 is adapted to move in the direction in which the pawl clutch 7 is disengaged. Reference numeral 10 denotes a flange fixed to the main shaft 1, and between this flange 10 and the slide drum 6, the slide drum 6 is connected to a pawl clutch 7.
A spring 11 is interposed that biases in the direction of engagement.

An adjustment gear shaft 12 is rotatably supported on the slide drum 6 parallel to its axis,
A pinion 13 provided at the tip of this adjustment gear shaft 12
is meshed with an eccentric gear 14 provided on the outer periphery of the eccentric drum 2. A driven gear 15 is fixed to the other end of the adjustment gear shaft 12, and this driven gear 15 is connected to an adjustment drive gear 16 provided coaxially with the main shaft 1.
It meshes with the The input shaft 16a, which is integrated with the adjustment drive gear 16, is connected to a drive shaft 18 via an electromagnetic clutch 17.

As shown in FIG. 2, there are two sets of press drive devices configured as described above, and these are synchronously driven by the main gear 19, so that the slides connected to the connecting rods 5 of each set move up and down in parallel. .

and the drive shaft 1 of each set of press drive devices.
8 and 18 have sprockets 20 and 20 with the same number of teeth.
Each sprocket 20, 20 is connected via a chain 21 to a drive sprocket 23 of an adjustment motor 22. In addition, the input shaft 16 of the adjustment drive gear 16 of each set of press drive devices is
Encoders 24, 24 are attached to each of a. The encoders 24, 24 are designed to detect the rotation angles of the adjustment drive gears 16, 16 as well as to detect relative angles. 2
Reference numeral 5 indicates the adjustment motor 22 and the electromagnetic clutch 1 according to input signals from the encoders 24, 24.
7, 17, and stops the adjustment motor 22 when the relative angle of each main shaft 1, 1 deviates. Also, both main shafts 1,
If one of the electromagnetic clutches 17 slips, the difference is read using an indicator that indicates the absolute angular position of the main shafts 1, and only one of the electromagnetic clutches is operated to return to its original position, eliminating the misalignment between the two main shafts 1. It is now possible to do so.

The operation of the above configuration will be explained below.

To change the stroke of two points, perform the following operations.

First, pressurized oil is supplied from the oil holes 9 of each main shaft 1, 1, and the slide drum 6 is moved against the spring 11 to disengage the eccentric drum 2 and the slide drum 6.

Next, each electromagnetic clutch 17 is engaged, and then the adjustment motor 22 is driven. In this way, the adjustment drive gears 16 of the respective adjustment drive sections are rotated synchronously.
By this rotation, the eccentric drum 2 is rotated relative to the main shaft 1 via the adjustment gear shaft 12 and pinion 13, and the stroke length of the press is changed.

At this time, if one of the two electromagnetic clutches 17, 17 slips, there will be a difference in the eccentricity of the eccentric drums 2, 2 of the two press drives, but in this case, the adjustment drive gear 16 of each adjustment drive , 16 is detected by the encoders 24, 24, and the detection signal causes the electromagnetic clutches 17, 17 to mutually rotate.
It is turned ON and OFF to eliminate misalignment between both gears 16 and 16.

Since the present invention is as described above, in a slide stroke length variable press having a plurality of points, the adjustment angles of the adjustment drive parts for each point can always be made the same. The configuration for this purpose is to install an encoder 2 in each adjustment drive section.
4, 24 and the signals of the encoders 24, 24 cause the adjustment motor 22 and the electromagnetic clutch 17,
Since only a control device for controlling 17 is provided, the configuration can be simple.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a longitudinal sectional front view showing the main parts, and FIG. 2 being a side view. 1 is a main shaft, 2 is an eccentric drum, 5 is a connecting rod, 17 is an electromagnetic clutch, 24 is an encoder,
25 is a control device.

Claims (1)

[Scope of utility model registration request] Eccentric portion 3 of each of the plurality of main shafts 1
In addition to rotatably fitting the eccentric drum 2,
A connecting rod 5 is connected to each main shaft 1 via a clutch, and the upper end of a connecting rod 5 whose lower end is connected to a slide is fitted into each eccentric drum 2. In a slide stroke length variable press having a plurality of points connected with slide adjustment drive devices that rotate relative to the main shaft 1, an electromagnetic clutch is connected between the input shaft and the drive shaft of each slide adjustment drive device. 17, each drive shaft and adjustment motor 22 are interlocked and connected, and an encoder 24 is connected to each input shaft of each slide adjustment drive device.
1. A stroke length adjustment device for a variable slide stroke length press, characterized in that the device is connected to a control device 25 that controls an adjustment motor 22 and electromagnetic clutches 17, 17 using input signals from the slide stroke length variable press.