JPH10225796A - Press driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly transmit stable torque even at the time of a high speed rotation, and to reduce cost with simple composition. SOLUTION: A main gear 27 engaged with a drive pinion 25 is provided on an eccentric boss 19 fixed on a frame 15. A link arm 41 is joined by a first link pin 31 whose both edges are supported by the main gear 27 and a second link pin 39 whose both edges are supported by a link arm 41 through a link lever 37. This link arm 41 is combined to a crank shaft 11 through a thrust fixing member 45. And, the main gear 27 is supported by bearings 51, 53 which are thrust receiving members. And, the stable torque can be transmitted at the time of a high speed rotation, and cost can be reduced with the simple composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a driving device for a press machine.

[0002]

2. Description of the Related Art Conventionally, in a C-type frame press, a press equipped with a quick return mechanism is basically a cantilever receiving type for receiving link pins constituting a link mechanism.
For example, a configuration described in JP-A-55-100897 is known.

Further, depending on the contents of the mechanism, a slide using a thrust and a guide groove are used to rotate the crankshaft at a non-constant speed so that the slide is quickly returned and linked.
For example, a configuration described in Japanese Utility Model Laid-Open No. 4-39592 is known.

[0004]

In the above-described conventional C-shaped frame press, rotation is transmitted from the main gear to the crankshaft via a link pin, a link bar, and a link arm. At this time, when a load is generated due to the cantilever of the link pin or the like, a lifting phenomenon (bending moment) occurs due to a difference in the load position of the link pin, and a component large in rotational force is required. In the case of high-speed rotation transmission, there was a difficulty.

An object of the present invention is to provide a drive device for a press machine capable of smoothly transmitting a stable torque even at high speed rotation and reducing the cost with a simple structure.

[0006]

According to a first aspect of the present invention, there is provided a press machine driving apparatus according to the present invention.
A main gear meshed with the drive pinion is rotatably provided on an eccentric boss fixed to a frame rotatably supporting one end of a crankshaft, and a first link pin having both ends supported at one end of the main gear is provided. One end of a link bar is provided on the first link pin, and the other end of the link bar is provided with a second link pin supported on both ends by a link arm, and one end of the crankshaft is connected to the link arm via a thrust fixing member. And the main gear is supported by a thrust receiving member provided between the frame and the link arm.

Therefore, the rotation of the main gear is transmitted to the first link pin supported at both ends and the second link pin supported at both ends via the link lever, and the link arm provided with the second link pin rotates. The link arm rotates the fixed crankshaft. On this occasion,
The generated thrust force is received by a thrust fixing member provided at the shaft end of the crankshaft on which the link arm is mounted. Further, the thrust force applied to the main gear is received by a thrust receiving member provided between the frame and the link arm.

Thus, a stable torque can be transmitted even at high speed rotation, and the cost can be reduced with a simple structure.

According to a second aspect of the present invention, there is provided a driving device for a press machine according to the first aspect, wherein the thrust fixing member comprises an end plate and a fastening member for fastening the end plate. It is characterized by having been done.

Therefore, since the movement of the link arm mounted on the crankshaft in the thrust direction is fixed by the end plate, the rotational force can be transmitted smoothly without rattling.

According to a third aspect of the present invention, there is provided a driving device for a press machine according to the first aspect of the present invention, wherein the thrust fixing member comprises a split piece provided at an axial end of a crankshaft. It is characterized by having.

Therefore, since the link arm mounted on the crankshaft is fixed in the thrust direction by the split piece, the rotational force can be transmitted smoothly without rattling.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. Since the entire configuration of the press machine is already known, detailed illustration and description are omitted.

Referring to FIG. 1 and FIG.
A bolster provided with a lower die for mounting a work on the upper part at the lower part on the front side of the side frame, and a vertically movable slide 3 having a lower die on the upper part on the front side of the side frame. Is provided. An adjusting screw 7 having a spherical bearing 5 is connected to the slide 3, and the adjusting screw 7 is screwed to a connecting rod 9, and the connecting rod 9 is rotatable on an eccentric shaft 13 of a crankshaft 11. It is attached to.

With the above configuration, the slide 3 moves up and down by the rotation of the crankshaft 11, and the work is pressed by the cooperation of the upper die and the lower die by the vertical movement of the slide 3.

One end (left side in FIG. 1) of the crankshaft 11 is rotatably mounted on a bearing 17 provided on a frame 15, and the other end (right side in FIG. 1) of the crankshaft 11 is fixed to the frame 15. Core boss 19
Is rotatably mounted on a bearing 21 provided at the center. In addition,
The eccentric boss 19 has a portion protruding from the frame 15 eccentric with respect to the axis of the crankshaft 11 by an eccentric amount H.

A drive device 23 for driving the crankshaft 11 is driven by a drive motor (not shown) via a flywheel, a clutch / brake device, or the like.
The main gear 27 is engaged with the drive pinion 25. The main gear 27 is rotatably fitted to a bearing 29 provided on an eccentric portion of the eccentric boss 19.

The main gear 27 has a first link pin 3
The other end of the first link pin 31 is fixed to a support plate 33 provided integrally with the main gear 27. More specifically, the support plate 33 has a U-shape, a stay 35 formed on the support plate 33 is provided integrally with the main gear 27, and the first link pin 31 is a two-sided type and is in a stable state. It is installed. (See FIG. 2).

The first link pin 31 has a link bar 3
7 is rotatably mounted, and the other end of the link bar 37 is the second
It is rotatably mounted on the link pin 39. The second
The link pin 39 is mounted on the bifurcated portion 41A of the link arm 41 in a double-supported manner, and the link arm 41 is fixed to the shaft end of the crankshaft 11 via a key 43.

Further, in the link arm 41, an end plate 47, which is a thrust fixing member 45 provided at an axial end of the crankshaft 11, is pressed and fixed by a fastening member 49 to receive a thrust force. Liner-shaped bearings 51 and 53 are provided as thrust receiving members between the main gear 27 and the frame 15 and between the main gear 27 and the link arm 41.
7 is responsible for the thrust force.

With the above configuration, when the drive pinion 25 is rotated, the main gear 27 meshed with the drive pinion 25 rotates, via the first link pin 31, the link bar 37, and the second link pin 39 provided on the main gear 27. As a result, the link arm 41 rotates. The rotation of the link arm 41 is transmitted to the crankshaft 11 via the key 43, and the connecting rod 9 engaged with the crankshaft 11
Move up and down. Since the crankshaft 11 and the link arm 41 are fixed by the thrust fixing member 45, the thrust force is received and the main gear 27 is fixed.
Are also liner-shaped bearings 51 and 53 which are thrust receiving members.
Receives the force in the thrust direction. For this reason, a stable state can be maintained even in the thrust direction.

With the configuration described above, stable torque can be transmitted even at high speed rotation, and the cost can be reduced because the drive unit 23 is compact.

FIG. 3 shows another embodiment of the thrust fixing member.

That is, as the thrust fixing member 45,
Groove 55 for split frame mounting on the shaft end of crankshaft 11
A split piece 57 is mounted in the groove 55, and the link arm 41 is fixed to the crankshaft 11 by the split piece 57 to receive the thrust force. Therefore, the same effects as those of FIGS. 1 and 2 are obtained.

The present invention is not limited to the above-described embodiments of the present invention, but can be embodied in other forms by making appropriate changes.

[0026]

As will be understood from the above description of the embodiments of the present invention, according to the present invention according to the first aspect, the rotation of the main gear is performed via the first link pin supported at both ends and the link lever. Both ends are transmitted to the supported second link pin, and the link arm provided with the second link pin rotates, and the link arm rotates the fixed crankshaft. At this time, the generated thrust force is received by a thrust fixing member provided at the shaft end of the crankshaft on which the link arm is mounted. Further, the thrust force applied to the main gear is received by a thrust receiving member provided between the frame and the link arm.

Thus, stable torque can be transmitted even at high speed rotation, and cost can be reduced with a simple structure.

According to the second aspect of the present invention, since the movement of the link arm mounted on the crankshaft in the thrust direction is fixed by the end plate, the rotational force can be smoothly transmitted without rattling.

According to the third aspect of the present invention, since the movement of the link arm mounted on the crankshaft in the thrust direction is fixed by the split piece, the rotational force can be transmitted smoothly without rattling. .

[Brief description of the drawings]

FIG. 1 is a sectional view of a driving device of a press machine, showing a main part of the present invention.

FIG. 2 is a side view as viewed in the direction of arrow II in FIG.

FIG. 3 is a cross-sectional explanatory view of a thrust fixing member according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Press machine 11 Crankshaft 15 Frame 19 Eccentric boss 23 Drive device 25 Drive pinion 27 Main gear 31 First link pin 37 Link bar 39 Second link pin 41 Link arm 45 Thrust fixing member 47 End plate 49 Fastening member 51, 53 Bearing (Thrust receiving member) 57 split top

Claims (3)

[Claims] 1. A main gear meshed with a drive pinion,
An eccentric boss fixed to a frame rotatably supporting one end of the crankshaft is rotatably provided, and a first link pin having both ends supported at one end of the main gear is provided. A second end provided with one end and the other end of the link bar supported at both ends by a link arm;
A link pin is provided, one end of the crankshaft is connected to the link arm via a thrust fixing member, and the main gear is supported by a thrust receiving member provided between the frame and the link arm. A driving device for a press machine, characterized in that: 2. The drive device for a press machine according to claim 1, wherein said thrust fixing member is constituted by an end plate and a fastening member for fastening said end plate. 3. The drive device for a press machine according to claim 1, wherein said thrust fixing member is constituted by a split piece provided at an axial end of a crankshaft.