JPH1099995A - Slide device of press using link - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which is less free from a play, i.e., high-speed and accurate by reducing the number of links and the number of connection parts in a slide device of a press using links. SOLUTION: Two connecting rods 13, 13' are connected to a crank shaft which is turnably provided on a frame of a press with the phase shift of 180 deg., one small end part of one connecting rod is connected to an upper end part of a left triangular link 14 constituting a so-called toggle link, and a small end part of the other connecting rod is connected to a left end part of a right triangular link l4'.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press slide drive device using a link.

[0002]

2. Description of the Related Art There are many applications relating to a device for driving a slide of a press using a link. Among them, Japanese Patent Application Laid-Open No. H08-118082 can be mentioned as one having a relatively small number of links, a small change in the bottom dead center position due to the inertia force of the slide, and easy to cope with a change in press speed.

However, the above-mentioned conventional example requires a slider and a guide groove for guiding the slider.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to reduce the number of links and the number of connecting portions in a slide driving device for a press using links, thereby reducing backlash, that is, a high-speed and precise device. It is to provide. In other words, it is to make the above-mentioned conventional technology simpler.

[0005]

Means for Solving the Problems A vertical link is divided into upper and lower two links, and two connecting rods are connected by shifting the phase by 180 degrees to a crank shaft rotatably provided on a frame of the press, Among these, the small end of one connecting rod is connected to the upper end of a left triangular link constituting a so-called toggle link, and the small end of the other connecting rod is connected to the left end of a right triangular link.

[0006]

When the connecting rod swings 180 degrees out of phase, the slide moves up and down by the action of the up and down links.

[0007]

In FIG. 1, a bolster 2 is fixed to a frame 1 of a press, and a slide 3 is provided so as to be movable up and down. An upper die and a lower die are set on the slide 3 and the bolster 2, respectively. , And press working is performed.

A slide guide rod 5 is fixed to the slide 3, and the slide guide rod 5 is fitted to a slide guide post 4 fixed to the frame 1.

Left and right plungers 6, 6 'are fixed to the slide 3, and these plungers 6, 6' are fitted to left and right plunger guides 7, 7 'fixed to the frame 1.

The frame 1 is provided with a crankshaft 12 rotatably, and the crankshaft 12 is provided with two eccentric parts which are 180 degrees out of phase. These eccentric parts are provided with a left connecting rod 13 and a right connecting rod 13. Connecting rod 13 '
Are connected at their large ends. 2 when the crankshaft rotates
The connecting rods 13 and 13 ′ are configured to swing.

The small end of the left connecting rod 13 is connected to the upper end of the left triangular link 14 by a first left pin 21. The center of the left triangular link 14 is connected to a left fulcrum pin 20 provided on the frame 1. One end of the lower left link 15 is connected to the lower end of the left triangular link 14 by a second left pin 22. The other end of the lower left link 15 is connected to the left plunger 6 by a third left pin 23.

Similarly, the small end of the right connecting rod 13 'is connected to the right first pin 2 by the left end of the right triangular link 14'.
They are connected by 1 '. The upper end of the right triangular link 14 'is connected to a right fulcrum pin 20' provided on the frame 1. One end of a lower right link 15 'is connected to a lower end of the right triangular link 14' by a second right pin 22 '. The other end of the lower right link 15 'is a right plunger 6'
Are connected by a third right pin 23 '.

When the crankshaft 12 rotates, the right and left connecting rods 13 and 13 'swing with a phase shift of 180 degrees, and the slide moves up and down by the action of the left and right links 14 and 14', 15, and 15 '. I do.

[0014]

The small end of the left connecting rod 13 is connected to the upper end of the left triangular link 14. Similarly, the small end of the right connecting rod 13 ′ is connected to the right triangular link 1.
Since the structure is connected to the left end of the 4 ', the number of links is relatively small and the number of connection points is also relatively small, so that the entire device is a compact slide drive device using links with little backlash. ing.

[Brief description of the drawings]

FIG. 1 is a front view showing a part of a cross section in an embodiment of the present invention (a right half shows a top dead center, and a left half shows a bottom dead center).

[Explanation of symbols]

1 is a frame, 2 is a bolster, 3 is a slide, 4 is a slide guide post, 5 is a slide guide rod, 6 is a left plunger, 6 'is a right plunger, 7 is a left plunger guide, 7' is a right plunger guide, and 12 is Crankshaft,
13 is a left connecting rod, 13 'is a right connecting rod, 14 is a left triangular link, 14' is a right triangular link, 15 is a lower left link, 15 'is a lower right link, 20 is a left fulcrum pin, and 20' is a right fulcrum pin. , 21 are the left first pin, 2
1 'is the first pin on the right, 22 is the second pin on the left, and 22' is the second pin on the right.
A pin 23 is a left third pin, and 23 'is a right third pin.

Claims (1)

[Claims] 1. A slide drive device for a press using a link, wherein (a) left and right plungers (6) (6 ') fixed to the slide (3) and guided by a press frame (1) so as to be able to move up and down. And (b) a crankshaft (12) having a pair of eccentric portions having the same amount of eccentricity and being out of phase with each other by 180 degrees, and a pair of left and right connecting rods whose large ends are connected to the pair of eccentric portions ( 13) (1
3 '), and (c) a left fulcrum pin (2) provided substantially at the center thereof on the frame (1).
0) and an upper end thereof is connected to a small end of the left connecting rod (13). A left triangular link (14) is connected to the lower end of the left triangular link (14). A lower left link (15) connected to the left plunger (6) and connected at the other end to the left plunger (6);
(E) A right triangular link whose upper end is connected to a right fulcrum pin (20 ') provided on the frame (1) and whose left end is connected to a small end of the right connecting rod (13'). (14 ') and (f) a lower right link (15) having one end connected to the lower right end of the right triangular link (14') and the other end connected to the right plunger (6 '). ') And a slide drive device for a press using a link, characterized by having: