JPS6037194Y2 - Crankshaft drive device in mechanical press - Google Patents

Description

[Detailed Description of the Invention] 1. Field of Industrial Application The present invention relates to a crankshaft drive device for a mechanical press.

1 Conventional technology Conventionally, the crankshaft drive device of a mechanical press has a flywheel and a clutch/brake installed at one end of the driveshaft, a crankshaft parallel to the driveshaft, and a reduction gear connected between them. , or an intermediate shaft was provided and connected in sequence with a reduction gear.

In addition, Japanese Patent Publication No. 46-34153 discloses a compact version in which a clutch/brake and a flywheel having a speed reduction device using planetary gears are installed on the crankshaft, but the structure is similar to that of one end of the drive shaft. The flywheel and the sun gear are integrally supported concentrically thereon, and a rotating body having a flange provided with a planetary gear that meshes with the sun gear is fixed to the drive shaft, and the rotating body that is concentric with the drive shaft that meshes with the outside of the planetary gear is fixed to the drive shaft. The ring gear is supported on both sides in the axial direction by the casing and the collar of the rotating body,
A clutch was provided between the ring gear and the casing, and a brake was provided between the collar of the rotating body and the casing.

1 The problem that the idea attempts to solve.

However, the former, which has a crankshaft, a drive shaft, and an intermediate shaft, has the disadvantage of increasing the size of the device, while the latter, although smaller, is unstable in supporting the ring gear and may deviate due to its own weight. This has the drawback of causing strain in the meshing with the planetary gears and shortening the lifespan of these gears due to damage due to wear.

Means and operation for solving problem 1 The present invention eliminates these drawbacks by providing a flywheel and a sun gear rotatably as one body concentrically at one end of the crankshaft, and a side part of the sun gear. A disk body with a planetary gear that meshes with the sun gear is fixed to the crankshaft, and an internal gear that meshes with the planetary gear and is concentric with the crankshaft and is rotatably supported by the planetary gear part and the crankshaft is installed. A brake that can freely brake and release the internal gear is installed between the outer periphery of the gear and the frame. A brake was provided at the other end of the crankshaft between it and the frame to freely brake and release the crankshaft.

Therefore, since the device is installed on the crankshaft, the device can be made smaller, and since the internal gear is completely supported, the device has less wear on the gear and is more durable.

〔Example〕

FIG. 1 shows the structure of a crankshaft drive device according to the present invention.

A crankshaft 1 is rotatably supported by a press frame 17, and a flywheel 7 and a shaft of a sun gear 8 are integrally fixed to the outer periphery of one end thereof and rotatably supported concentrically. .

A disc body 2 is located on the side of the sun gear 8 and is attached to the crankshaft 1.
is fixed, and a short shaft 3 parallel to the crankshaft 1 is provided thereon.

A planetary gear 4 that meshes with a sun gear 8 is rotatably supported on the short shaft 3.

An internal gear 9 having internal teeth meshing with the planetary gear 4 is provided concentrically with the crankshaft 1, one end of which is connected to the shaft of the sun gear 8 with a bearing 10, and the other end is connected to the crankshaft with a bearing via a retaining plate 12. It is pivoted at 11.

A friction plate 14 equipped with a lining 13 is fixed to the outer circumference of the internal gear 9, and air cylinders 15 are provided on both sides of the friction plate 14.

When air is supplied, the air cylinder 15 clamps the lining 13, and when the air is removed, the clamping is released by the spring 16.

The air cylinder 15 is connected to the frame 17 by a pin 18.

The flywheel 7 is connected by a belt 6 to the output shaft of a motor 5 fixed to a frame 17.

The number of teeth of the sun gear 8, the planetary gear 4, and the internal gear 9 are set so that a required reduction ratio can be obtained.

A brake 19 is provided at the other end of the crankshaft 1 between it and the frame 17 and is capable of braking and releasing the crankshaft 1 .

That is, a friction plate 21 is fixed to the crankshaft 1, and an air cylinder 20 provided on the frame 17 is biased by a spring to clamp the friction plate 21 to perform braking, and release the brake by supplying air. .

Next, we will discuss the effect.

When trying to operate the press, use the air cylinder 15.2
0 starts the motor 5 in a state where no air is supplied, that is, the crankshaft 1 is braked by the brake 19, and the friction plate 14 of the internal gear 9 is released from braking.

The flywheel 7 and the sun gear 8 rotate, and the planetary gear 4 rotates on the short axis 3 of the disk body 2 which is stopped together with the crankshaft 1.

Therefore, the internal gear 9 is rotating in the opposite direction to the sun gear 8.

This state is a stopped state of the crankshaft 1.

When attempting to rotate the crankshaft 1, air is supplied to the air cylinders 15 and 20.

The brake 19 is released, and at the same time, the friction plate 14 of the internal gear 9 is held between the air cylinder 15 and braked to a stop.

Then, the planetary gear 4 driven by the rotation of the sun gear 8 rotates on its own axis and rolls according to the internal gear 9, and revolves around the sun gear 8.

The revolution of the planetary gear 4 rotates the crankshaft 1 via the short shaft 3 and the disk body 2.

That is, the crankshaft 1 rotates while being reduced in speed by the constant reduction ratio of the planetary gear mechanism relative to the rotational speed of the sun gear 8.

When stopping, the air in the air cylinders 15 and 20 may be removed to return to the above-mentioned state.

The friction plate 14 of the internal gear 9 and the air cylinder 15 function as a clutch that is switched on and off by braking and releasing.

1. Effects of the invention According to this invention, the flywheel, clutch, and brake are provided on one crankshaft, resulting in a smaller size.The brake is provided on the other end of the crankshaft, which completely supports the internal gear. This has great practical effects and advantages, such as reducing wear on planetary gears and internal gears and improving durability.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional front view of a main part of a mechanical press provided with an embodiment. 1 is the crankshaft, 2 is the disk body, 3 is the short shaft, 4 is the planetary gear,
5 is a motor, 6 is a belt, 7 is a flywheel, 8 is a sun gear, 9 is an internal gear, 10 is a bearing, 11 is a bearing, 12 is a holding plate, 13 is a lining, 14 is a friction plate, 15 is an air cylinder, 16 is the spring, 17 is the frame,
18 is a pin, 19 is a brake, 20 is an air cylinder, 2
1 is a friction plate.

Claims (1)

[Scope of utility model registration request] A flywheel 7 and a sun gear 8 are fixed integrally and rotatably concentrically with one end of a crankshaft 1 rotatably provided on a frame 17 of a mechanical press.
A disk body 2 is fixed to the crankshaft 1 located on the side of the crankshaft 1, and a planetary gear 4 meshing with a sun gear 8 is rotatably attached to at least one short shaft 3 provided on the disk body 2 parallel to the crankshaft 1. An internal gear 9 having internal teeth meshing with the planetary gear 4 is rotatably supported concentrically with the sun gear 8 and the crankshaft 1. A mechanical press characterized in that a clutch with a brake that can freely brake and release the crankshaft 1 is provided, and a brake 19 that can freely brake and release the crankshaft 1 is provided between the other end of the crankshaft 1 and the frame 17. Crankshaft drive.