JPH07314191A - Driving device for sliding of press machine - Google Patents

Abstract

PURPOSE:To make it possible to incorporate a driving device for sliding of a inconstant speed rotating mechanism of a crank shaft of a press machine into a frame of the same structure as the structure of a constant speed rotating mechanism. CONSTITUTION:The inconstant rotating mechanism 1 is constituted by slidingly fitting and stoppering an extension member 9A of an eccentric bearing member 9 slidingly fitted onto a crank shaft 4 to a driving shaft 7, connecting a first pin 12 erected in the barrel part of a main gear member 10 freely rotatably and slidingly fitted to the eccentric bearing member 9 and a second pin 15 erected at an arm 13 fixed at the rear end of the crank shaft 4 to each other by means of a link 16 and meshing the main gear member 10 with a pinion gear part 17 of the driving shaft 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for vertically moving a slide of a press machine, and more particularly to a press machine for vertically moving the slide by rotating a crankshaft.

[0002]

2. Description of the Related Art Conventionally, in a slide driving device of a press machine, a crankshaft is coupled to a main gear, and the crankshaft is rotated at a constant speed by a rotational force transmitted from the main gear. As a slide drive device for rotating at a non-constant speed, the main gear is eccentric with the crankshaft, the lever provided on the crankshaft and the main gear are connected via a link, and the constant-speed rotation of the main gear is composed of these link and lever. An eccentric link mechanism for rotating the crankshaft at a non-uniform speed, for example, Japanese Patent Laid-Open No. 62-
275599 or the like, the main gear and the crank shaft are eccentric, a lever is provided on the crank shaft, a guide groove is formed in this lever, and a slider provided on the main gear is slidably engaged with this guide groove to prevent the main gear from sliding. Constant speed rotation of the crankshaft at a non-uniform speed by means of a slider mechanism consisting of these sliders and guide grooves, for example, the actual open shaft 5
7-76997 etc.

[0003]

In the case of the slide drive device of the press machine of the above-mentioned conventional non-uniform speed rotation mechanism, since the eccentric bearing is fixed to the frame, the constant speed rotation mechanism is provided. Since the structure and size of the press machine are different from those of the press machine, it was difficult to share the frame of the press machine with the constant speed rotating mechanism and the non-uniform speed rotating mechanism.

An object of the present invention is to provide a slide drive device for a press machine in which a non-uniform speed rotation mechanism can be incorporated in the same frame as the constant speed rotation mechanism of the press machine.

[0005]

In order to achieve the above object, according to the present invention, a crankshaft supported by a bearing member provided on a frame is rotatably provided eccentrically to the crankshaft and extends downward. An eccentric bearing member eccentrically eccentrically with the crankshaft on an outer diameter portion on the crankshaft side by rotatably sliding the extended portion on the drive shaft, and a rotatably mounted eccentric bearing member on the trunk portion. A main gear member having one pin, an arm fixed to the rear end of the crankshaft and having a second pin erected at its tip, and both ends of the first pin and the second pin slidably engaged with each other. By configuring the non-uniform speed rotating mechanism only on the drive shaft with the link connecting them, the non-uniform speed rotating mechanism is attached to the frame of the press machine of the constant speed rotating mechanism in which the eccentric bearing is not fixed to the frame. Press machine that can be incorporated Providing slide drive unit.

[0006]

With the structure in which the eccentric bearing member of the slide driving device of the press machine of the non-uniform speed rotating mechanism described above is not fixed to the frame, the non-uniform speed rotating mechanism is incorporated in the same frame as the constant speed rotating mechanism. It is possible.

[0007]

1 and 2 show an embodiment of the present invention.
Thereby, it can be shared with the frame 3 of the constant velocity rotating mechanism 2 shown in FIG.

The non-uniform speed rotation mechanism 1 shown in FIGS. 1 and 2 is
The crankshaft 4 is rotatably supported on the upper part of the frame 3,
The eccentric portion 4A of the crankshaft 4 and the slide 6 are connected via a connecting rod 5. The slide 6 is guided up and down by a guide portion (not shown) above the frame 3.
Below the crankshaft 4, a drive shaft 7 parallel to the crankshaft 4 is rotatably supported at an intermediate portion in the vertical direction of the frame 3,
The drive shaft 7 is rotationally driven by the power transmitted from a flywheel 8 provided at the rear end of the drive shaft 7.

An eccentric bearing member 9 having a center Q eccentric downward from the center P of the crankshaft 4 by an eccentric amount e is rotatably slidably fitted in the middle of the rear end of the crankshaft 4. A main gear 10 is rotatably fitted on the outer periphery of the plate, and a pressing plate 11 regulates the movement in the axial direction. An extension portion 9A that extends downward is integrally provided at the front portion of the eccentric bearing member 9, and the lower end portion of the extension portion 9A is slid on the drive shaft 7, so that the eccentric bearing member 9 rotates around the crankshaft 4. I'm stopping it from turning. A first pin 12 oriented in the axial direction is provided upright on the rear trunk of the main gear member 10.

The rear end of the crankshaft 4 is made slightly thinner than the middle of the rear end portion, and the arm 13 is keyed here, and the end face plate 14 is provided to prevent it from coming off. At the tip of the arm 13, a second pin 15 that faces the axial direction is erected, and a link 16 connects the first pin 12 and the second pin 15. Pinion gear portion 1 that meshes with the gear on the outer periphery of the main gear member 10.
7 is provided on the drive shaft 7, the main gear member 10 is rotationally driven, and the rotation is transmitted to the crankshaft 4 via the first pin 12, the link 16, the second pin 15 and the arm 13, The constant speed rotation is changed to the non-uniform speed rotation of the crankshaft 4.

Due to the unequal rotation of the crankshaft 4, the slide 6 performs a fast return motion in which the descending stroke from top dead center to bottom dead center is slow and the ascending stroke from bottom dead center to top dead center is fast. .

FIG. 3 shows that the frame 3 having the same structure can be used in common regardless of whether it is the non-uniform speed rotating mechanism or the uniform speed rotating mechanism. An example is shown.

In the constant velocity rotating mechanism 2 shown in FIG. 3, the crankshaft 18 is rotatably supported on the upper portion of the same frame 3 as described above, and the slide 6 is connected to the eccentric portion 18A of the crankshaft 18 via the connecting rod 5. There is. The slide 6 is guided up and down by a guide portion (not shown) above the frame 3. A drive shaft 19 is rotatably supported in parallel with the crankshaft 18 at an intermediate portion of the frame 3 in the vertical direction.
9 is rotationally driven by the power transmitted from the flywheel 8 provided at the rear end.

At the rear end of the crankshaft 18, a main gear 20 is concentrically keyed, and an end face plate 21 prevents the main gear 20 from coming off. The drive shaft 19 is integrally provided with a pinion gear 22 that meshes with the main gear 20. Therefore, the constant speed rotation of the drive shaft 19 gives the constant speed rotation to the crankshaft 18 via the pinion gear 22 and the main gear 20. By rotating the crankshaft 18 at a constant speed, the slide 6 performs a crank motion in which the descending stroke from the top dead center to the bottom dead center and the ascending stroke from the bottom dead center are equal.

It is obvious that even if the non-uniform speed rotating mechanism is a slider mechanism as shown in FIGS. 4 and 5, it can be shared with the frame 3 of the constant speed rotating mechanism 2 shown in FIG.
4 and 5, 23 is a pin, 24 is a slider,
25 is a lever.

[0016]

As is apparent from the above description, according to the present invention, an eccentric bearing member in which a crankshaft is slidably engaged with a non-constant speed rotation mechanism and an extending portion thereof is slidably engaged with a drive shaft. By providing the above, the frame having the same structure can be shared regardless of the case of the uniform speed rotating mechanism or the non-uniform speed rotating mechanism.

[Brief description of drawings]

FIG. 1 is a side sectional view of a main part of a slide drive device of a non-uniform speed rotation mechanism using an eccentric link mechanism of the present embodiment.

FIG. 2 is a rear view of the main part of FIG.

FIG. 3 shows a case where a slide driving device of a constant velocity rotating mechanism is incorporated in the frame of FIG.

FIG. 4 is a side sectional view of a main part of a slide drive device of a non-uniform speed rotation mechanism using a slider mechanism of the present embodiment.

5 is a rear view side sectional view of the main part of FIG.

[Explanation of symbols]

1 is a non-uniform speed rotation mechanism, 2 is a constant speed rotation mechanism, 3 is a frame, 4 and 18 are crankshafts, 4A and 18A are eccentric parts, and 5 are
Is a connecting rod, 6 is a slide, 7 and 19 are drive shafts, 8 is a flywheel, 9 is an eccentric bearing member, 10 is a main gear member, 11 is a holding plate, 12 is a first pin, 13 is an arm, and 14 and 21 are End plate, 15 is a second pin, 16 is a link, 17 is a pinion gear portion, 20 is a main gear, 22
Is a pinion gear, 23 is a pin, 24 is a slider, and 25 is a lever.

Claims (1)

[Claims] Claim: What is claimed is: 1. Power from a flywheel is transmitted to a crankshaft supported by a bearing member provided on a frame via a main gear that meshes with a pinion gear of a drive shaft, and slides via a connecting rod connected to the crankshaft. In a slide drive device of a press machine for vertically moving a crankshaft, an eccentric bearing member that is supported by slidingly supporting the crankshaft and the drive shaft, and has an outer diameter portion on the crankshaft side eccentric to the crankshaft, and the eccentric bearing. A main gear member that has a first pin that is rotatably slidably fitted to the member and that is axially erected on the body portion;
A second member which is fixed to the rear end of the crankshaft and is erected in the axial direction.
And a link connecting the first pin and the second pin with each other, and a slide drive device of a press machine.