JPH10216995A - Press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct inclination due to the eccentric load of an a slide guide of a press by a simple mechanism. SOLUTION: This press is constructed so that rotation of a crank shaft 1 supported to a housing 9 is transmitted to a slide 2 connected to a connecting rod so as to make the slide 2 an up/down linear motion. In this case, an upper beam 10, which slides on a guide post 8 and conducts an up/down linear motion, is interposed between connection of the connecting rod 5 and the slide 2, the eccentric load transmitted to the slide 2 is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a structure of a press machine.

[0002]

2. Description of the Related Art As is well known, a crank press has a structure shown in FIG.
And a side sectional view of FIG. 4 and 5, reference numeral 1 denotes a crankshaft supported by a housing 9, 2 denotes a slide, and 3 denotes a balancer. The slide 2 is connected to a plunger 4, and the plunger 4 is rotatably connected to a connecting rod 5 connected to the crank of the crankshaft 1. The balancer 3 is rotatably connected to a link 6 connected to the crank of the crankshaft 1.

When the crankshaft 1 is driven to rotate by a driving device (not shown), the slide 2 is driven up and down along a slide guide 7, and when the slide 2 moves downward and reaches the bottom dead center, the workpiece 2 is moved. To process. The balancer 3 is provided with a guide post 8 installed vertically above and below a housing 9 in the direction opposite to the direction in which the slide 2 is driven up and down.
The mechanical vibrations of the slide 2 are offset by the mechanical vibrations of the balancer 3 to suppress the mechanical vibrations of the press machine.

[0004]

In the press machine constructed as described above, the vertical movement of the slide 2 is performed by being guided by the slide guide 7, and the slide 2 is moved by the eccentric load.
Is suppressed by the sliding portion between the slide 2 and the slide guide 7. However, there is a limit in suppressing the inclination of the slide 2 during the movement due to the eccentric load with this sliding contact portion.
There is a problem that the inclination of the slide 2 due to the eccentric load cannot always be corrected accurately.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a press machine capable of correcting the inclination of a slide guide of the press machine due to an eccentric load by a simple mechanism.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a housing, a guide post installed in the housing, a crankshaft pivotally supported by the housing,
It has a connecting rod connected to the crankshaft, an upper beam connected to the connecting rod, and a slide connected to the upper beam, wherein the upper beam is slidably connected to the guide post. It is achieved by doing.

According to a feature of the invention, the rotational movement of the crankshaft is transmitted to the upper beam via the connecting rod and to the slide via the upper beam. The upper beam is slidably connected to the guide post, and the eccentric load is absorbed by this connection. Therefore, the transmission of the eccentric load to the slide is reduced, and the inclination of the slide due to the eccentric load is almost eliminated.

The structure for reducing the transmission of the eccentric load to the slide is achieved by a simple mechanism in which an upper beam is added to a connecting portion between the connecting rod and the slide, and the upper beam is slidably connected to the guide post. Is done. At that time, if a guide post of a balancer is used as the guide post, the configuration is further simplified.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a front side sectional view of a press machine according to an embodiment, FIG. 2 is a side sectional view of the press machine shown in FIG. 1, and FIG. 3 is a side sectional view of a press machine according to another embodiment. The same parts as those of the press machine shown in FIGS. 4 and 5 are denoted by the same reference numerals.

1 and 2, 1 is a crankshaft, 2 is a slide, 3 is a balancer, 4 is a plunger,
5 is a connecting rod, 6 is a link, 7 is a slide guide, 8
Is a guide post, 9 is a housing, and 10 is an upper beam.

A link 6 and a connecting rod 5 are respectively connected to the crankshaft 1, and a balancer 3 is connected to the link 6, and a guide post 8 fixedly installed in a housing 9.
Are slidably connected to each other, and their configuration is the same as that of the press machine shown in FIGS. 4 and 5, and operates in the same manner.

The slide 2 is connected to an upper beam 10 by a plunger 4, and the upper beam 10 is connected to a connecting rod 5.
Is rotatably connected to At both ends of the upper beam 10, through holes 10a are formed.
The upper beam 10 can be moved by sliding the guide post 8 through the guide post 8.

When the crankshaft 1 rotates, the rotational motion of the press machine is transmitted to the upper beam 10 by the connecting rod 5, and is converted into a vertical linear motion by sliding the guide post 8 of the upper beam 10. You. The slide 2 is connected to the upper beam 10 that has been converted into a linear motion, and is hardly affected by the eccentric load transmitted by the connecting rod 5.

In the embodiment shown in FIG. 3, the upper beam 10 is connected to the crankshaft 1 by two connecting rods 5, and the balancer 3 is connected to the crankshaft 1 by one link 6. The slide 2 is connected to an upper beam 10 converted into a linear motion,
It is hardly affected by the eccentric load transmitted by the connecting rod 5.

In the embodiment, the guide post 8 guides the upper and lower linear motion of the upper beam 10 and the upper and lower linear motion of the balancer 3, but each linear motion is performed by another guide post. Needless to say, this is fine. In this case, the number of guide posts for guiding the linear motion of the upper beam 10 up and down can be further increased.

[0016]

As described above, according to the present invention, since the rotation of the crankshaft is transmitted and the slide that moves up and down linearly is performed through the upper beam that linearly moves by the guide post, the eccentricity transmitted to the slide is achieved. The load is reduced, and a highly accurate press machine resistant to eccentric load can be obtained.

[Brief description of the drawings]

FIG. 1 is a front side sectional view of a press machine according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the press machine shown in FIG.

FIG. 3 is a side sectional side view of a press machine according to another embodiment of the present invention.

FIG. 4 is a front side sectional view of a conventional press machine.

FIG. 5 is a side sectional view of the press machine shown in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crankshaft 2 Slide 3 Balancer 4 Plunger 5 Connecting rod 6 Link 7 Slide guide 8 Guide post 9 Housing 10 Upper beam

Claims (1)

[Claims] 1. A housing, a guide post installed in the housing, a crankshaft pivotally supported by the housing, a connecting rod connected to the crankshaft, an upper beam connected to the connecting rod, And a slide connected to the upper beam, wherein the upper beam is slidably connected to the guide post.