JPH0353833Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a micro-inching device used in a mechanical press to operate the press at a slow speed for mold matching, feeder conveyance adjustment, and the like.

``Prior art'' Conventionally, micro-inching devices for mechanical presses have a cylindrical brake body that is rotatably installed on the press body and that is concentric with the outer periphery of the rotating shaft of the press, and that engages with the internal teeth of the brake body. A brake disc with external teeth is attached to a circular cylinder fixed to a rotating shaft, and the outer periphery of a piston that fits into the annular cylinder chamber provided in this cylinder and moves in the axial direction with pressurized air to contact the clutch. A brake is provided between the cylinder and the cylinder, which clamps and brakes the brake disc between them with a spring that urges the cylinder to pull the piston back, and the brake body of this brake is a worm wheel with teeth provided on the outer circumference. A worm shaft that engages with the worm shaft is rotatably provided on the machine body, a motor is connected to this worm shaft, and when the press is stopped and the brake is operating, the motor is controlled to rotate in forward and reverse directions to rotate the worm shaft, and the brake body, Presses that rotate the rotating shaft of the press at a very low speed through a brake disk and cylinder are often used.

``Problems to be solved by the invention'' The above-mentioned conventional device rotates the rotating shaft at a very low speed through a brake that brakes the rotating shaft of the press, so it is difficult to transmit a rotational force that exceeds the braking force produced by the brake spring. I can't. Furthermore, since the outer circumference of the brake is used, the device becomes larger. Since it is not an independent device, it is troublesome to add this device to the press, and the security maintenance of the press is complicated and inconvenient.

``Purpose of the invention'' The purpose of the invention is to eliminate these drawbacks and provide a micro-inching device that is an independent device that can be connected to the end of the rotating shaft of a press, has a simple and compact structure, and can transmit high output. .

"Means and effects for solving the problems" The structure of the present invention is that a friction plate is fixed to the end of the rotating shaft of the press, and a housing fixed to the body of the press has a friction plate fixed to the end of the rotating shaft of the press.
An output shaft that is rotatable concentrically and movable in the axial direction is provided on an extension of the rotating shaft of the press, and at the end of the output shaft there is a clamping plate portion that faces the friction plate, surrounds the outer periphery of the friction plate, and presses the opposite side surface. Provided with a cylinder having
A disk-shaped piston that fits into the cylinder and faces the friction plate is urged with pressurized air toward the clamping plate to clamp the friction plate, and is concentric with an intermediate shaft parallel to the output shaft and an extension of the output shaft. The input shaft is rotatably provided in the housing, the small diameter gear provided on the input shaft is engaged with the medium diameter gear provided on the rotating shaft, and the pinion provided on the intermediate shaft and the large diameter gear provided on the output shaft are engaged. It is characterized in that the V-pulley provided on the input shaft and the V-pulley provided on the motor output shaft are connected by a V-belt. The press is stopped, the main brake of the press is released, pressurized air is supplied to the cylinder, and the motor is controlled to rotate in forward and reverse directions to operate the press at very low speed.

Embodiment FIG. 1 shows the structure of a micro-inching device 2 of the present invention provided at the tip of a rotating shaft 1 of a press. The friction plate 3 of the micro-inching device 2 is fixed to the tip of the rotating shaft 1, and the housing 4
is fixed to the press body (not shown) toward the tip of the rotating shaft 1. The housing 4 has a rotating shaft 1
An output shaft 5 and an input shaft 6 are rotatably supported concentrically with each other, the output shaft 5 is movable in the axial direction, and a piston facing the friction plate 3 is provided at the end of the output shaft 5 facing the rotating shaft 1. 7 is adapted, and a clamping plate portion 8A that surrounds the outer circumference of the friction plate 3 of the cylinder 8 and faces the outer circumference of the opposite side has a clamping plate portion 8A that is arranged between the piston 7 and the piston 7 when the piston 7 is operated by pressurized air. The friction plates 3 are held between them, and rotational force is transmitted from the output shaft 5 to the rotating shaft 1. An air passage 9 that airtightly connects the center of the output shaft 5 to the center of the input shaft 6 is connected to the cylinder chamber between the piston 7 and the cylinder 8, and a rotary joint is provided at the end of the input shaft 6 of the air passage 9. 10 is provided, and a pressure air supply/discharge port 10A of the rotary joint 10 is connected to a pressure air source 12 via a normally closed solenoid valve 11 which is switched open by an electric signal. A slight gap is provided between the abutting portions of the output shaft 5 and the input shaft 6, and the output shaft 5 is supported so as to be able to move slightly in the axial direction due to the operation of the piston 7.

The housing 4 is provided with a shaft 13 parallel to the output shaft 5 and the input shaft 6 below the output shaft 5 and the input shaft 6, and an intermediate shaft 14 rotatable around the shaft 13 is provided, and is fixed to the pinion 15 of the intermediate shaft 14 and the output shaft 5. Large diameter gear 1
It meshes with 6. In addition, a medium diameter gear 17 provided at a position corresponding to the input shaft 6 of the intermediate shaft 14,
It meshes with the small diameter gear 18 provided on the input shaft 6,
The rotation of the input shaft 6 is reduced in two steps and transmitted to the output shaft 5. A large-diameter V-pulley 19 is fixed to the end of the input shaft 6 protruding from the housing 4, and is connected by a V-belt 22 to a small-diameter V-pulley 21 fixed to the output shaft of a motor 20 attached to the upper surface of the housing 4. are doing.

Regarding the operation, when the press is stopped, the main brake 23 (detailed structure is omitted) installed between the rotating shaft 1 and the press body (not shown) stops the rotating shaft 1.
is braking. When operating the press at a slow speed, the main brake 23 of the press is released, the motor 20 is controlled to rotate in the required direction, and the V-pulley 2
1, 19 and the V-belt 22 to rotate the output shaft 5 via the input shaft 6, gear 18, gear 17, intermediate shaft 14, pinion 15, and gear 16, and transmit an electric signal to the solenoid valve 11. switch to open and connect rotary joint 1 from pressure air source 12.
0. Pressurized air is supplied to the cylinder 8 through the air passage 9, and the piston 7 is urged to firmly clamp the friction plate 3 between it and the clamping plate portion 8A, thereby transmitting a large rotational force to the rotating shaft 1. . Overload on the rotating shaft 1 side can be prevented by adjusting the air pressure.

"Effect of the invention" As is clear from the above explanation, according to the invention, a device independent of the press body is connected to the end of the rotating shaft of the press, so it can be attached and detached freely and can be easily added to the press. . Since the clutch is composed of a cylinder provided on the output shaft and a friction plate provided on the rotating shaft of the press, it is possible to transmit high rotational force.

Since the output shaft and the input shaft are provided concentrically and the rotating shaft is provided parallel to these, and a two-stage reduction gear is provided between them, the device can be made smaller and the structure can be simplified. Since the clutch is configured, it limits the maximum pressure of the compressed air and serves as an overload prevention device. A gap is provided between the output shaft and the input shaft, and the output shaft is supported so as to be movable in the axial direction, so that no excessive force is applied when the friction plate of the rotating shaft of the press is held between the cylinders. The practical effects and benefits are great.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of the embodiment, 1 is a rotating shaft, 2 is a micro-inching device, 3
is a friction plate, 4 is a housing, 5 is an output shaft, 6 is an input shaft, 7 is a piston, 8 is a cylinder, 9 is an air passage, 10 is a rotary joint, 11 is a solenoid valve,
12 is a pressure air source, 13 is a shaft, 14 is an intermediate shaft, 1
5 is a pinion, 16 is a gear, 17 is a gear, 18 is a gear, 19 is a V pulley, 20 is a motor, 21 is a V
A pulley, 22 is a V-belt, and 23 is a main brake.

Claims (1)

[Claims for Utility Model Registration] A micro-inching device used to rotate a rotating shaft 1 of a mechanical press at a very low speed, comprising: a friction plate 3 fixed to one end of the rotating shaft 1; an output shaft 5 which is provided concentrically and rotatably with the shaft 1 and has a cylinder 8 surrounding the friction plate 3 at the end opposite to the friction plate 3; A piston 7 is provided in the fuselage section and is connected to the output shaft 5 in a dynamic manner to clamp and release the friction plate 3 between the cylinder 8 and the cylinder 8 by means of pressurized air supplied to and discharged from the cylinder 8. 5. A micro inching device comprising: a driving means for rotationally driving the micro inching device 5 at a very low speed;