JPH0446687B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a rotational drive device for a shaft workpiece, particularly a crankshaft.

<Prior Art> When grinding the journal portion of a crankshaft, there are two types of workpieces: one with a counterweight at one end and one without. When rotating the crankshaft supported on the headstock center, a pin that contacts the counterweight is provided on the mounting face plate for a workpiece that has a counterweight, and the pin is removed for a workpiece that does not have a counterweight. Rotation was transmitted by providing a pin that engaged with a pin hole or screw hole drilled at the end of the crankshaft.

<Problems to be Solved by the Invention> The above-mentioned conventional rotary drive device requires manual setup changes to replace pins each time for workpieces with and without counterweights, resulting in poor work efficiency. There was a problem.

<Means for Solving the Problems> The present invention has been made to solve the above-mentioned conventional problems. A protrusion drive device equipped with a drive pin that is moved forward and backward in an axial direction parallel to the axis of the shaft workpiece to engage and disengage it by an actuator, and a pin hole at the end of the shaft workpiece supported by the shaft workpiece. A pin hole drive device is installed in which an engageable engagement pin is provided so as to be movable forward and backward in the pin hole engagement direction.

<Function> In the case of a workpiece with a protrusion, the drive pin is moved forward to abut and engage with the protrusion, and in the case of a workpiece without a protrusion, the engagement pin is engaged with the engagement hole and rotated. It is something that is driven.

<Examples> Examples of the present invention will be described below based on the drawings. In Figures 1 and 2, 1 is the headstock, 2
3 is a support shaft fixed to the headstock 1, and 3 is a mounting face plate rotatably supported on the support shaft 2. A pulley 4 is integrally provided on the mounting face plate 3 and is connected to a drive motor (not shown) via a belt 5.

Reference numeral 6 denotes a center mounted on the axis of the support shaft 2, which is a crankshaft (shaft workpiece) W1 having a counterweight (protrusion) C as shown in FIG. 1 or a counter as shown in FIG. It does not have a weight C, but supports a crankshaft W2 having a pin hole H (or screw hole) at one end.

The present invention provides for a countershaft W1 having a counterweight C on the mounting face plate 3,
A drive pin 11 that engages and disengages from the counterweight C.
For a counterweight drive device A having a counterweight C and a crankshaft W2 having no counterweight C and having a pin hole H at one end, the pin hole H
A pin hole drive device B is attached which is provided with an engaging pin 16 that engages with the pin hole.

As shown in FIG. 1, the concrete structure of the counterweight drive device A is such that the piston rod 8 of the cylinder device 7 is fixed to the mounting face plate 3 in an axial direction parallel to the axis of the center 6. A pilot bar 1 is provided with one end of the piston rod 8 as a guide and fixed to the mounting face plate 3 with an axis parallel to the piston rod 8 with the center 6 sandwiched therebetween.
A movable disk 9 that is movable forward and backward using 0 as a guide.
be fixed integrally. As shown in FIG. 3, this movable disc 9 has a structure in which a drive pin 11 is provided protrudingly to engage with the counterweight C of the crankshaft W1. In addition, as another modification, the cylinder device 7 is fixed to the mounting face plate 3, and the piston rod 8 is made axially movable.
The movable disc 9 may be fixed to.

On the other hand, the specific configuration of the pin hole drive device B is as follows.
As shown in FIGS. 3 to 3, a support member 12 is fixed to the mounting face plate 3, and a lever 13 is pivoted to the support member 12 parallel to the front surface of the mounting face plate 3 by a pivot 14 so as to be able to swing forward and backward. do. An engaging pin 16 that engages with the pin hole H at the end of the crankshaft W2 is provided protrudingly on this lever 13, and the lever 13 and the mounting face plate 3 are connected so that the engaging pin 16 always moves forward in the direction of the pin hole H. This structure has a spring 15 interposed between them.

In addition, as another modification, the engagement pin 16 may be moved forward and backward using a hydraulic cylinder.

In FIGS. 1 and 2, reference numeral 17 is a temporary support member for the crankshafts W1 and W2, which moves to a required position each time the workpiece is changed, and is kept at the same position when the workpiece is of the same type.

Next, the operation of the above configuration will be explained. As shown in FIG. 1, in the case of a crankshaft W1 having a counterweight C, the movable disk 9 is moved forward by the cylinder device 7, and the drive pin 11 is brought into contact and engagement with the counterweight C. . As a result, the rotation of the mounting face plate 3 is transmitted to the movable disc 9 via the piston rod 8 and the pilot bar 10.
Furthermore, it is transmitted from the drive pin 11 via the counterweight C to the crankshaft W1.

When the crankshaft W1 having this counterweight C is supported on the center 6, the end surface of the crankshaft W1 comes into contact with the engagement pin 16, and the lever 13 compresses the spring 15 and moves backward, thereby pushing the engagement pin 16 is let go.

On the other hand, in the case of the crankshaft W2 without the counterweight C, by supporting the crankshaft W2 on the center 6, the engagement pin 16 engages with the pin hole H at the end of the counterweight W2, thereby preventing the rotation of the mounting face plate 3. It is transmitted to the crankshaft W2 via the support member 12, lever 13, and engagement pin 16. When the crankshaft W2 is rotationally driven by the engagement pin 16, the cylinder device 7 moves the drive pin 11 backward based on a workpiece discrimination signal, which is a known means, to prevent interference between the drive pin 11 and the temporary support member 17. Avoid.

<Effects of the Invention> As described above, according to the present invention, there is provided a protrusion drive device equipped with a drive pin on a mounting face plate that is moved forward and backward by an actuator and abuts and engages with a protrusion of a shafted workpiece; Since this configuration is equipped with a pin hole drive device in which an engaging pin that engages with the pin hole is movable forward and backward, it can be divided into a shaft workpiece with a protrusion and a shaft workpiece without a protrusion. The rotary drive setup for different types of workpieces can be automatically changed, which has the effect of significantly improving work efficiency.

The above-described embodiment is an example applied to a crankshaft, but it can also be applied to shaft workpieces, such as an axle shaft and a knuckle steering.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a cross-sectional side view of a crankshaft with a counterweight installed, FIG. 2 is a side view of a crankshaft without a counterweight installed; FIG. 3 is a view taken along the line in FIG. 1. 1... Headstock, 2... Support shaft, 3... Mounting face plate, 6... Center, 7... Cylinder device, 8...
Piston rod, 9...Movable disc, 11...Drive pin, 13...Lever, 15...Spring, 1
6... Engagement pin.

Claims (1)

[Claims] 1 A drive that engages and disengages a mounting face plate rotatably provided on the headstock by moving it forward and backward in an axial direction parallel to the axis of the shafted workpiece by an actuator to a protrusion of the shafted workpiece supported by the headstock center. It is characterized by being equipped with a protrusion drive device equipped with a pin, and a pin hole drive device in which an engagement pin capable of engaging with a pin hole at the end of the shaft workpiece is provided so as to be movable forward and backward in the pin hole engagement direction. Workpiece rotation drive device.