JPS6340320Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a drive device for a double-acting mechanical press.

[Conventional technology]

For example, double-acting presses are used to form panel materials for automobile bodies by press working. In general, this type of double-acting mechanical press has, as shown in FIG. 3, upper and lower outer dies 2 and 3 that sandwich the peripheral edge of the workpiece 1, and upper and lower inner dies 4 that process the area other than the peripheral edge of the workpiece 1. 5, and the upper outer die 2 is held by the outer slide 6 and the upper inner die 4 is held by the inner slide 7. The outer slide 6 and the inner slide 7 are driven by the drive device provided on the upper crown 8 side, and the upper outer die 2
By giving the upper inner die 4 a vertical slide stroke with a phase shift,
Work 1 is pressed. 9 is bed, 1
0 indicates a column.

Conventionally, as the above-mentioned drive device, a connecting rod mechanism as shown in FIGS. 4 and 5 has been mainly employed. That is, as shown in FIGS. 4 and 5, a drive pinion 13 is provided on a drive shaft 12 which is rotated by a motor (not shown) through a flywheel 11 and a clutch 32. , meshes with one of intermediate gears 15a, 15b provided on left and right intermediate shafts 14a, 14b arranged in parallel and meshing with each other. A main pinion 1 is attached to the intermediate shafts 14a and 14b, respectively.
6a, 16a, 16b, 16b are provided, and these main pinions 16a, 16a, 16b, 16b
are main shafts 17a, 17a, 17b, 17 arranged at required intervals on axes parallel to the intermediate shafts 14a, 14b on the left and right outer sides of the intermediate shafts 14a, 14b, respectively.
It meshes with main gears 18a, 18a, 18b, 18b on b. Eccentric pins 19a, 19b are attached between the boss portions of the main gears 18a, 18a and between the boss portions of the main gears 18b, 18b, respectively.
Inner pitmen 20a, 20 that suspend and support
The upper ends of a, 20b, and 20b are pivotally supported.
Further, connection links 21a, 21b are provided at the center of the eccentric pins 19a, 19b, and the connection links 21a, 21b are connected to the main shaft 17.
a, 17a, 17b, a rocker shaft 22a arranged parallel to the left and right outer sides of the axis of 17b,
22b is pivotally connected to central links 23a and 23b. Links 24a, 24a, 24b, 24b are fixed to the ends of the rocker shafts 22a, 22b, and the links 24a, 24a, 24b, 24b
are rocker arms 25a, 2 whose ends are pivotally connected to the ends of the main shafts 17a, 17a, 17b, 17b, respectively.
Small link 26 in the middle part of 5a, 25b, 25b
a, 26a, 26b, 26b, and further rocker arms 25a, 25a, 25b, 25
At the other end of b, there are outer pitmen 27a, 27a, which suspend and support the outer slide 6 at the lower end.
The upper ends of 27b and 27b are pivotally connected. still,
28 is a brake that stops the rotation of the drive shaft 12.

Therefore, the rotation of the drive pinion 13 is transmitted to the main pinions 16a, 16a, 16b, 16b via the intermediate gears 15a, 15b and the intermediate shafts 14a, 14b.
Main gears 18a, 18a, 18b, 1 meshing with b
8b rotates around main shafts 17a, 17a, 17b, and 17b. Main gears 18a, 18a, 18b,
When the eccentric pins 18b rotate, the eccentric pins 19a, 19b rotate around the axes of the main shafts 17a, 17a, 17b, 17b, and the inner pitmen 20a, 20a, 20b, 2 provided on the eccentric pins 19a, 19b rotate.
0b moves up and down, giving a vertical stroke to the inner slide 7. On the other hand, eccentric pin 19a,
By rotation of 19b, connection links 21a,
21b is displaced, the rocker shaft 22
Each link 23a, 23b, 24a of a, 22b,
24a, 24b, 24b repeatedly perform fan-like movements, and the outer pitman 27a, 27a, 27b is moved through the links 24a, 24a, 24b, 24b, the small links 26a, 26a, 26b, 26b, and the rocker arms 25a, 25a, 25b, 25b. ，
27b moves up and down, giving the outer slide 6 a stroke in the up and down direction.

[Problem to be solved by the invention] However, in the case of such a drive device, the eccentric pins 19a, 19b are not connected to the main gears 18a, 18a due to the reaction force from the inner pitmen 20a, 20a, 20b, 20b during machining. , 18b, 18b, and therefore the diameter is relatively large. Therefore, when used in a press with a large capacity, the eccentric pins 19a, 19b must have a larger diameter.
If the diameter of 19b is increased, the main gears 18a, 18a, 1
Since 8b and 18b are also larger, the eccentric pin 19
a, 19b and main shafts 17a, 17a, 17b, 17
The dimension between the inner slide 7 and the outer slide 6 also becomes larger, which causes the problem that the entire device becomes larger.

In view of these circumstances, the present invention is designed so that the overall size of the device does not increase even if it is adopted in a press with a large capacity, and furthermore, the phase of the inner pit man and the outer pit man can be shifted arbitrarily.

[Means for solving problems]

In the present invention, main shafts are arranged at a required interval on the same axis, main gears that apply driving force to both main shafts are provided facing each other, and an eccentric pin having an eccentric wheel is provided between the boss portions of the two main gears. At the same time, a support ring is fitted to the eccentric pin at a position apart from the wheel, so that the support ring is integrated with the main gear, and an outer pit man is connected to the eccentric wheel via a link mechanism, and to the support ring. It has a structure in which inner pitmen are connected to each other.

[Effect]

Therefore, the reaction force acting on the inner pit man during machining is transmitted to the main shaft via the support ring.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on FIGS. 1 and 2. In FIGS. 1 and 2, the same reference numerals as in FIGS. 4 and 5 indicate the same parts. In addition, in Figure 1, for convenience of explanation, the subscript a
The left side of the device is shown using the reference numeral , but the right side has a similar configuration.

In the configuration shown in FIGS. 4 and 5, the present invention provides eccentric wheels 29a, 29b at the center of the eccentric pins 19a, 19b, and connects a connection link 2 to the outer periphery of the eccentric wheels 29a, 29b.
Support rings 30a, 30a, 30b, 30 are fitted at both ends of the eccentric pins 19a, 19b in a rotatable manner.
b, and the support rings 30a, 30a, 3
0b, 30b are the main gears 18a, 18a, 18b,
The inner pit man 20a, 20a, 20b, 20b is integrally fixed to the boss portion of the support ring 30a, 30a, 30b, 30b.
They are respectively pivoted. Also, eccentric pin 19a,
19b is, for example, the main gear 18a, 18a, 18
It is fixed with screws 31 from the boss portions of b and 18b so that its position can be adjusted.

With such a configuration, the reaction force during machining that acts on the inner pitmen 20a, 20a, 20b, 20b is reduced by the support rings 30a, 30a, 30b,
30b to main gears 18a, 18a, 18b, 18
It can be transmitted to the main shafts 17a, 17a, 17b, and 17b via b and received by the crown 8. Therefore, no large shearing force acts on the eccentric pins 19a, 19b. Therefore, even if the eccentric pins 19a and 19b are used in a press with a large capacity, there is no need to increase the diameter of the eccentric pins 19a and 19b as in the conventional case.
a, 19b and main shafts 17a, 17a, 17b, 17
Since there is no need to widen the dimension between b and b, the device can be made more compact than in the past.

In addition, in this invention, the inner pit man 20
In the mutual motion of a, 20a, 20b, 20b and the outer pit man 27a, 27a, 27b, 27b, any phase can be selected. That is, in FIG. 2, O ₁ is the main gear 18
a, 18a, 18b, 18b, O ₂ is the axis of the eccentric pins 19a, 19b, O ₃ is the axis of the eccentric wheels 29a, 29b, and the straight line between the axes O ₁ and O ₂ and the axis The angle θ formed by the straight line between O ₁ and O ₃ is
The adjustment can be made by rotating the eccentric pins 19a, _19b about the axis O2 and displacing the position of the axis _O3 of the eccentric wheels 29a, 29b. The positions of the eccentric pins 19a and 19b are adjusted by tightening the screws 31. By adjusting the angle θ and the distance between O ₁ and O ₃ in this way, the axis O ₁
Since the angle θ of the eccentric wheels 29a and 29b rotating around and the eccentric radius of the axis O ₃ change,
The motions of the connection links 21a, 21b fitted to the outer peripheries of the eccentric wheels 29a, 29b change, and the inner pitmen 20a, 20a, 2
0b, 20b and outer pit man 27a, 27
a, 27b, 27b, and outer pitmen 27a, 27b.
The shapes of the motions 7a, 27b, and 27b can be changed. Furthermore, the inner pit man 20a, 20a, 20 can be installed without changing the shape of the motion.
b, 20b and outer pit man 27a, 27
In order to generate only the phase shift of a, 27b, and 27b, it is possible to easily generate the phase shift between the axes O ₁ and O ₃ without changing the length of each link by keeping the dimension between the axes O 1 and O 3 and changing the angle θ.

It should be noted that the present invention is not limited only to the above-mentioned embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effect of idea]

As explained above, according to the drive device of the double-acting mechanical press of the present invention, (i) the reaction force during press working that acts on the inner pit man side is transmitted to the main shaft side and hardly transmitted to the eccentric pin side; This eliminates the need to increase the diameter of the eccentric pin even if it is used in a press with a large capacity, and the device can be made more compact.

(ii) Since the eccentric radius on the outer pitman side can be adjusted, an arbitrary phase can be given to the motion on the inner pitman side and the outer pitman side.

It can produce excellent effects such as

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the main parts of the drive device of the present invention, and Fig. 2 is a schematic diagram showing the outline of the drive device of the present invention, with the left half showing the outer pit man part and the right half showing the inner pit man part. Front view showing (4th
3 is a schematic diagram of a double-acting mechanical press, FIG. 4 is an explanatory perspective view of a conventional drive device, and FIG. 5 is a partial sectional view of FIG. 4. 17a, 17b are main shafts, 18a, 18b are main gears, 20a, 20b are inner pitmen, 21
a, 21b are connection links, 22a, 22
b is rocker shaft, 23a, 23b, 24
a, 24b are links, 27a, 27b are outer pitmen, 29a, 29b are eccentric wheels, 30
a and 30b indicate support rings.

Claims (1)

[Scope of utility model registration request] Main shafts are arranged at a required interval on the same axis, main gears that apply driving force to both main shafts are provided facing each other, and an eccentric pin having an eccentric wheel is provided between the boss portions of the two main gears, A support ring is fitted onto the eccentric pin at a position away from the eccentric wheel so that the support ring is integrated with the main gear, an outer pit man is attached to the eccentric wheel via a link mechanism, and an inner pit man is attached to the support ring. A drive device for a double-acting mechanical press characterized by being connected to each other.