JPH0381095A - Driving device for press - Google Patents

Abstract

PURPOSE:To compact a press without a flywheel and to strengthen its pressurizing force by arranging an eccentric shaft at the output end of a power shaft and an eccentric input pin at the input end and driving the shaft with a clutch built-in motor. CONSTITUTION:A driving device of the press composed of a C-frane 1, a bed 2, a ram 3, a motor 4 and a controller 5 is made up so that an eccentric shaft 24 is formed at the output end of the power shaft 15 to transmit turning force to the ram 3 and an eccentric input pin 54 is equipped at the input end and positioned in a guide groove 76 of a turning arm 77 at the end of a driving shaft 16. Further, the driving shaft 16 is driven directly by a clutch built-in motor. In this way, the press is compacted by removing a flywheel and a large pressurizing force can be obtained, furthermore.

Description

[Detailed description of the invention] "Industrial application field" The present invention relates to a drive device for a press machine.

``Prior art and problems to be solved by the invention'' Conventional press machines use a crank mechanism or trouble mechanism as a drive device, and a flywheel is provided with a clutch interposed, and the energy stored in the flywheel is used to drive the press machine. Press processing is being carried out. Because of the large diameter flywheel, it was impossible to make the press compact, and even though the press machine was expensive, it was not always possible to obtain a large pressing force.

"Means for Solving the Problem" Therefore, in view of the above circumstances, the present invention eliminates the flywheel to make it as compact as possible, and also allows a large pressing force to be obtained without using the flywheel. , an eccentric shaft is formed by making the output end of the output shaft eccentric, and the eccentric shaft is connected to a ram guided in the vertical direction by a rail so that its rotational force is transmitted, and the eccentric shaft is made eccentric to the input end of the output shaft. The input bin is positioned in the guide groove of the swing arm at the end of the drive shaft, and the drive shaft is directly driven by a motor with a built-in clutch.

``Operation'' The ram is moved up and down by a crank mechanism driven by the rotation of the output shaft, and the output shaft is rotated by power being transmitted to an input pin located within the guide groove of the swing arm of the drive shaft. The output shaft and drive shaft are separated by their axes, and the input pin of the output shaft is rotated by the guide groove of the swing arm, and the maximum load is generated at the bottom dead center.

"Embodiment" The present invention will be described in detail below based on a specific embodiment shown in the accompanying drawings.

Figure 7 shows the overall outline.

A bed 2 is fixed to the lower upper surface of the opening of a C-shaped frame 1, a ram 3 is provided on the upper lower surface opposite to the bed 2 so that it can be raised and lowered, and a motor 4 with a built-in clutch is mounted on the upper part of the frame 1.
is fixed to the frame 1, and an operation panel 5 is provided on the side surface of the center portion of the frame 1.

As shown in FIG. 1, the frame l is a C-shaped frame made of plate material, and a bearing cylinder 11 is provided horizontally on the upper part of the C-shaped frame.

Further, the motor 4 is fixed with bolts (not shown) to the protruding upper side of a vertical plate 13 attached to the frame 1 with bolts 12. Further, a cover 14 is attached to the upper surface of the frame 1 with bolts (not shown).

An output shaft 15 is provided horizontally on the bearing cylinder 11 of the frame 1 via a bearing, and the ram 3 is located on the output side of the output shaft 15, while a drive shaft 16 is placed on the input side of the output shaft 15. It is arranged horizontally with the output shaft 15 and the shaft center apart.

The output shaft 15 is rotatably accommodated in the bearing cylinder 11 via bearings 21 and 22. A collar 23 is interposed between the bearing 21 and the bearing 22, the bearing 21 is fixed to the bearing cylindrical body 11 by a bearing presser 20, and the output shaft 15 is rotatably provided, and the output shaft 15 is eccentrically disposed on the output side. The eccentric shaft 24 is provided in a protruding manner. Note that the stroke of the ram 3 is twice this eccentricity fiN.

On the other hand, the ram 3 has a T-shaped horizontal section as shown in FIG.
, and is slidable in the vertical direction by the 7-shaped guide groove 28.

As shown in FIGS. 3 and 4, a space 31 is formed near the frame 1 of the ram 3, a link 32 is accommodated in the space 31, and the eccentric shaft of the output shaft 15 is placed below the link 32. 24 is inserted through the bearing 33. Bearing presser foot 3
4 to the link 32 with bolts 35 to fix the bearing 33 to the link 32. Note that the blank space 31 is a link 32
Formed to a size that does not impede movement.

A pin 41 is screwed with a bolt 42 to project horizontally from the top of the ram 3. A bearing 43 is externally fitted onto the protrusion of the pin 41 and internally fitted onto the top of the link 32, and the bearing plate 44 is attached to the ram 3. Tighten with bolts (not shown).

When the output shaft 15 rotates, the eccentric shaft 24 rotates around the output shaft 15, and the rotational force is transmitted to the link 32,
The rotational force of the link 32 is transmitted to the ram 3 via the pin 41. The ram 3 is guided by a T-shaped guide/s28 and moves up and down without rotating. Note that a mold mounting bracket 45 for attaching a press mold is screwed onto the lower surface of the ram 3.

In this way, the ram 3 moves up and down in the vertical direction due to the crank motion of the output shaft 15, and generates a pressing force as shown by curve A in FIG. In the figure, the horizontal axis shows the crank rotation angle (×10 degrees), and the vertical axis shows the pressure force. The pressure force is zero at top dead center, increases as it approaches bottom dead center, reaches its maximum at bottom dead center, and When it returns to top dead center, it gradually decreases to zero.

At the input end of the output shaft 15, a rotary plate 51 is prevented from rotating with a key 52 and fixed with a screw 53. An input bin 54 is horizontally projected near the outer periphery of the rotary plate 51 and screwed with a nut 55.

On the other hand, the drive shaft 16 is fitted with a bearing 6465 in a cylindrical housing 63 screwed onto the plate 13 with bolts 62.
It is rotatably accommodated with the intervening. A collar 66 is interposed between the bearings 64 and 65. This drive shaft 16 is eccentrically parallel to the output shaft 15. This drive shaft 16
The drive shaft 16 is rotated by a timing belt 70 wrapped around a tying pulley 67 fixed to the input end of the motor 4 and a tying pulley 69 fixed to the output shaft 68 of the motor 4. Reference numeral 71 is the cover and timing pulley 68
・Cover the tie belt 69 and the tie belt 70.

At the output end of the drive shaft 16, as shown in FIG. 5, a pivot arm 77 having an elongated guide groove 76 having a width to receive the input pin 54 is screwed with a bolt 78.

When the drive shaft 16 is rotated by the motor 4, the swing arm 77 rotates around the drive shaft 16. Then, output shaft 1
Since the input pin 54 of No. 5 is located within the guide groove 76 of the swing arm 77, it is rotated, and the power of the drive shaft 16 is transferred to the output shaft 1.
5. At this time, since the drive shaft 16 is arranged with its axis apart from the output shaft 15 and is transmitted to the manual pin 54 through the guide groove 76 of the swing arm 77, the pressurizing force of the output shaft 15 at that time is At this point, the distance between the axis of the drive shaft 16 and the manual pin 54 is the shortest, and the maximum output is generated, as shown by curve 8 in FIG. When making a crank motion, the output shaft 15 generates a pressing force with a curved line, so the output shaft 15 driven by the output shown by the 8 curves is
A C-curve pressing force is generated, and the pressing force increases rapidly at the bottom dead center.

When performing press processing with this press machine, the lower die of the press die is attached to the bed 2, and the upper die is attached to the die mounting bracket 4 of the ram 3.
Attach to 5.

When the motor 4 with a built-in clutch is energized, the motor 4
The power is transmitted from the timing pulley 69 to the drive shaft 16 via the timing belt 70 and the tie pulley 67, and from the rotation arm 77 via the input pin 54 to the rotating plate 5.
1 to the output shaft 15, and then to the eccentric shaft 24.
Power is transmitted from the bottle 41 to the ram 3 via the link 32, and the ram 3 is guided by the T-shaped guide groove 28 and moves up and down in the vertical direction to perform press working.

If this drive device is applied to a small press machine, it can be used for crimping and caulking wire terminals, etc.

"Effects of the Invention" As described above, the present invention provides an eccentric shaft that is eccentrically formed at the output end of the output shaft, and whose rotational force is transmitted to the ram that is vertically guided by a guide member. This is a press machine drive device in which the input pin is eccentrically connected to the input end of the output shaft and is positioned within the guide groove of the swing arm at the end of the drive shaft.Moreover, the drive shaft has a built-in clutch. This is a drive device for a press machine that is directly driven by a motor that does not require a flywheel to make it as compact as possible, and also allows a large pressing force to be obtained without using a flywheel. . Conventionally,
A pressing force of only about 1450 kg could be obtained using a 200 W motor, but according to the present invention, a pressing force of 1450 kg can be obtained using a 60 W motor.

[Brief explanation of drawings]

The drawings show a specific embodiment of the present invention; FIG. 1 is a longitudinal sectional view thereof, FIG. 2 is a horizontal sectional view showing the vertical guide portion of the ram of the present invention, and FIG. 3 is a longitudinal sectional view of the ram. , FIG. 4 is a right side view of FIG. 3, FIG. 5 is a front view of the swing arm, FIG. 6 is a characteristic curve diagram showing the relationship between crank rotation angle and pressing force according to the present invention, and FIG. FIG. 1 is a perspective view showing an outline of the invention. 15... Output shaft 24... Eccentric shaft 26, 27... Rail cover (example of guide member) 3.
... Ram 54 ... Input pin 77 ... Swivel arm 76 ... Guide groove

Claims (2)

[Claims] (1) An eccentric shaft is formed by making the output end of the output shaft eccentric, and the eccentric shaft is connected to a ram guided in the vertical direction by a guide member so that its rotational force is transmitted, and the input of the output shaft is A drive device for a press machine in which an input pin eccentrically provided at the end is located in a guide groove of a swing arm at the end of the drive shaft. (2) The drive device for a press machine according to claim 1, wherein the drive shaft is directly driven by a motor having a built-in clutch.