JP3424066B2 - Turntable rotation mechanism of vertical molding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning mechanism of a vertical molding machine in which a die is installed on a turntable on a machine base.

[0002]

In this type of vertical molding machine, the rotary shaft centering on the turntable is rotatably supported on the fixed side by the machine base or the fixed plate on the machine base, and the fixed side. The machine base or the fixed board is configured to receive the mold clamping force applied to the turntable by the contact with the upper surface.

In order to reduce the frictional resistance at the time of rotation so that the turntable can be smoothly rotated, the turntable is provided so as to be able to move up and down together with the rotating shaft, although it has a slight dimension with respect to the fixed side. ing. Hydraulic pressure is generally used as the lifting means, and the lifting means is operated by operating a piston provided around or below the upper portion of the rotary shaft.

A problem in connecting a motor to the rotating shaft of the turntable to rotate and raise and lower the turntable is to provide both a hydraulic device for lifting and a motor for the rotating shaft. Therefore, the rotating mechanism is complicated and it is difficult to refuel the bearings and the operating parts.

The present invention has been conceived in order to solve the above-mentioned problems. The rotating shaft serves as a piston and the bearing cylinder also serves as a hydraulic cylinder, thereby simplifying the rotating mechanism and ascending and descending. A turntable for a vertical molding machine with a new configuration that uses a part of the pressure oil for the bearing as lubricating oil for the bearings and the operating part, and can always maintain good turning and lifting operations without special lubrication. It is to provide a rotating mechanism.

[0006]

According to the present invention according to the above object, a turntable on which a die is placed is fixed to a machine base or a fixed plate on the machine base, and a central rotating shaft is fixed to the fixed side. In a turntable rotation mechanism in which a bearing cylinder is rotatably supported by a bearing cylinder and a motor is connected to the rotation shaft,
The rotating shaft is provided in a bearing cylinder so as to be movable up and down by a bearing on a side portion, and between the bearing cylinder above and below the bearing and the rotating shaft, an upper oil chamber and a lower oil chamber using the rotating shaft as a piston. Is formed by applying a seal ring to the outer circumference of the rotating shaft, leaking pressure oil from the upper and lower oil chambers to intervene as a clearance between the bearing cylinder and the rotating shaft and as lubricating oil for the bearing. It is configured to be discharged as drain from the lower end of the bearing cylinder via the inside of the moving shaft.

According to the present invention, the motor is fixed to the lower end of the bearing cylinder with the drive shaft facing upward, and the output shaft connected to the drive shaft and the rotary shaft are connected by a key in the rotary shaft. In addition, the leaked oil is interposed as lubricating oil for the clearance between the rotating shaft and the output shaft, and the motor is connected to the speed reducer fixed in the lower end of the bearing cylinder and mounted on the bearing cylinder. It is also a thing.

Still further, according to the present invention, the speed reducer is fixed to the lower end of the bearing cylinder together with a support plate that is long sideways with the output shaft facing upward, and the motor is installed at the end of the support plate. The motor and the speed reducer are also connected by a pulley and a timing belt.

In the above construction, since the rotary shaft moves up and down by the upper and lower oil chambers formed between the bearing cylinder and the bearing cylinder, it is not necessary to separately provide a hydraulic device for raising and lowering.
In addition, since the pressure oil leaked from the oil chamber can be interposed as a lubricating oil, it is not necessary to supply oil to the operating portion and the bearing, and a good operating state can be maintained for a long time even without oil supply.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the drawings, reference numeral 1 denotes a reciprocating (180 °) turntable of a vertical molding machine equipped with a rotating shaft 2 on the lower side of the center. Are placed at opposite positions on the upper surface. 3 is a machine base whose upper part also serves as a fixed platen, and a bearing cylinder 4 of the above-mentioned rotary shaft 2 is provided in the center.
The upper end of the bearing cylinder 4 is fitted vertically to the upper part of the machine base by bolts, and an electric or hydraulic motor 5 such as a servomotor is attached to the lower end of the bearing cylinder 4.

The bearing cylinder 4 has a lid member 6 at the upper end.
The upper cylinder 7 and the lower cylinder 8 having the lower end formed on the receiving edge 9 are fitted to each other and bolted together. Inside the cylinders, stepped portions for bearing reception and oil chamber formation are formed at required locations, and oil holes 10 and 11 are provided on the side walls of the upper cylinder 7 and the lower cylinder 8 and the lower cylinder 8 is provided. A drain hole 12 is formed in each of the receiving edges 9.

The rotating shaft 2 is formed by integrally forming a flange 14 in the middle of the side of a shaft member having a cylindrical lower half and a protrusion 13 at the upper end, and a key for a joint inside the lower part. 15 is formed to project vertically. Further, the inside of the lower portion and the outer side surface of the upper portion are communicated with each other by a flow passage 16 formed by forming holes in the vertical and horizontal directions.

Bearings 17, 18 and 19 are provided on the upper and lower sides of the flange 14 and on the outer periphery of the shaft below the flow passage. Is a plurality of seal rings 20, 2
0 is given. A clearance for raising and lowering the rotary shaft 2 is set between the bearing 18 and the step portion.

The rotary shaft 2 as described above is provided in each bearing 1.
7, 18 and 19 are provided in the bearing cylinder so as to be vertically movable, and between the bearing cylinder 4 above and below the bearing and the rotating shaft 2, the rotating shaft 2 is provided by the step portion and the seal rings 20 and 20. An upper oil chamber 21 and a lower oil chamber 22 having pistons as pistons are formed, and the pressure oil is alternately fed into the upper and lower oil chambers 21 and 22 from the oil holes 10 and 11 to turn the rotary shaft 2 into a turntable. It is designed to be lifted up and down by the required size together with 1.

The motor 5 includes a drive shaft 24 and a reducer 23.
Is attached to the bearing edge 9 of the bearing cylinder 4. A key groove 26 and a drain groove 27 are vertically provided on the output shaft 25 of the speed reducer 23, and the key groove 26 is provided in the key groove 26.
5 is inserted and the output shaft 25 is jointed in the lower portion of the rotary shaft 2. As a result, the rotation speed of the motor 5 is reduced by the speed reducer 2.
The output shaft 25 causes the rotating shaft 2 to rotate together with the turntable 1 by being decelerated by 3 and output.

The reduction gear 23 is attached to the receiving edge 9 by fitting the reduction gear 23 to a motor flange 29 having a packing 28 around the fitting portion and fixing the motor flange 29 to the receiving edge 9 with a bolt. Do it. The inside of the lower portion of the bearing cylinder 4 sealed by fitting the motor flange 29 has a drain hole 12
And a drain groove 27 are formed in an open oil chamber 30, and the motor 5 has a fixing ring 31 bolted to the motor flange 29.

To mount the rotary shaft 2 in the bearing cylinder and mount it on the turntable 1, first, the rotary shaft 2 is mounted with the bearings 17, 18 and the seal rings 20, 20 on the outer periphery. Insert into the upper cylinder 7 from the lower end. Next, the lower cylinder 8 is fitted on the rotary shaft 2, fitted on the upper cylinder 7, and bolted. A bearing 19 is fitted between the upper portion of the rotary shaft 2 and the upper cylinder 7 to close the cylinder opening by the lid member 6. As a result, the bearing cylinder 4 in which the rotary shaft 2 is housed is completed.

Next, the motor 5 is attached to the lower end of the bearing cylinder 4 together with the speed reducer 23, and the output shaft 25 is rotated.
Joint in the lower part of. After that, the upper part of the bearing cylinder 4 is fitted into the hole in the center of the machine base and bolted. By this attachment, the projection 13 of the rotary shaft 2 projects to the upper surface of the machine base. Therefore, the hole in the center of the turntable is fitted into the projection 13 and the turntable 1 is installed on the machine base, and the pin 32 is driven. Thus, the turntable 1 and the rotary shaft 2 are integrated.

FIG. 3 shows another mounting means for the motor 5 and the speed reducer 23 to the bearing cylinder 4, in which the speed reducer 23 is provided in the lower end of the bearing cylinder 4.
Is fixed upward together with the long support plate 33, and the motor 5 is installed at the end of the support plate 33.
And the speed reducer 23 are connected by pulleys 34, 35 and a timing belt 36.

Reference numeral 37 in the drawing denotes a positioning pin which is attached to the tip of the piston rod of the air cylinder 38 and is fitted into the positioning hole 39 of the turntable 1 penetrating the upper part of the machine base. Reference numeral 40 denotes a stopper provided on the machine base side, which is accommodated in a semicircular groove formed on the back side of the turntable 1. Although the illustrated embodiment includes the speed reducer 23, the drive shaft of the motor 5 may be directly connected to the output shaft 25 to rotate the rotary shaft 2 in some cases.

In the rotating mechanism having the above structure, the rotation by the motor 5 is decelerated and transmitted to the output shaft 25, and the rotating shaft 2 rotates together with the turntable 1. When pressure oil is supplied from the oil hole 11 to the lower oil chamber 22, the rotary shaft 2 is hydraulically moved upward to separate the turntable 1 from the upper surface of the machine base. Conversely, pressure oil is supplied from the oil hole 10 to the upper oil chamber 21. When supplied, the rotary shaft 2 is lowered by hydraulic pressure and the turntable 1 comes into contact with the upper surface of the machine base.

The oil leaked from the lower oil chamber 22 passes through the clearance between the lower cylinder 8 and the rotary shaft 2 to the oil chamber 3 described above.
0, the pressure oil in the upper oil chamber 21 dips the bearings 17 and 18 in the middle of the side portion, and the leaked oil passes through the clearance between the upper cylinder 7 and the rotary shaft 2 and the bearing 19 at the upper end portion. It flows into the flow passage 16, flows down in the rotation shaft, and flows into the oil chamber 30 from the drain groove 27. The leaked oil merges with this oil chamber 30 and is discharged from the drain hole 12 of the receiving edge 9. In the process, the leaked oil also permeates the clearance of the joint portion between the key 15 and the key groove 26. .

Therefore, the oil leaked from the upper and lower oil chambers acts as a lubricating oil by interposing in the clearance between the rotary shaft 2 and the bearing cylinder 4 or in the joint portion,
The clearance of the working part and the bearings 17, 18,
Since 19 is in a state of being refilled with the leaked oil, it is not necessary to refill the turning mechanism and the vertical movement even during long-term use, and it is possible to maintain the turning and lifting accuracy of the turntable 1 for a long time. Become.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view of a central portion of a machine base provided with a turntable rotating mechanism of a vertical molding machine according to the present invention.

FIG. 2 is a vertical cross-sectional view of the turntable rotating mechanism of the present invention, showing a side view in which a half of a rotating shaft is vertically cut.

FIG. 3 is a partially longitudinal side view of a central portion of a machine base provided with a turntable rotating mechanism according to another embodiment of the present invention.

[Explanation of symbols]

1 turntable 2 rotation axis 3 machines 4 bearing cylinder 5 motor 12 drain holes 14 Flange 15 keys 16 flow passage 17 Midway bearing 20 seal ring 21 Upper oil chamber 22 Lower oil chamber 23 reducer 25 Output shaft 26 keyway 27 drain groove 29 Motor flange 31 fixing ring

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) B29C 33/30 B29C 45/06 B29C 45/83

Claims (4)

(57) [Claims] 1. A turntable on which a die is mounted is rotatably installed on a fixed side of a machine base or a fixed board on the machine base, with a central rotating shaft supported by a bearing cylinder on the fixed side. In a turntable rotating mechanism in which a motor is connected to the rotating shaft, the rotating shaft is provided in a bearing cylinder so as to be vertically movable by a bearing on a side portion, and the bearing cylinder above and below the bearing and the rotating shaft are provided. In between, an upper oil chamber and a lower oil chamber, which use the rotary shaft as a piston, are formed by applying seal rings to the outer circumference of the rotary shaft, and pressure oil leaks from the upper and lower oil chambers to rotate with the bearing cylinder. The turntable rotation of the vertical molding machine is characterized in that it is interposed as a clearance with the shaft and as lubricating oil for the bearing, and leaked oil is discharged as a drain from the lower end of the bearing cylinder through the rotary shaft. Dynamic mechanism. 2. The motor is fixed to the lower end of the bearing cylinder with the drive shaft facing upward, and the output shaft connected to the drive shaft and the rotary shaft are connected by a key in the rotary shaft. 2. The turntable rotating mechanism for a vertical molding machine according to claim 1, wherein the leaked oil is interposed as lubricating oil for a clearance between the rotating shaft and the output shaft. 3. The turntable rotation of a vertical molding machine according to claim 1, wherein the motor is connected to a speed reducer fixed in the lower end of the bearing cylinder and mounted on the bearing cylinder. mechanism. 4. The speed reducer is fixed to the lower end of the bearing cylinder together with a laterally long support plate with the output shaft facing upward,
The turntable for a vertical molding machine according to claim 1 or 2, wherein the motor is installed at an end portion of the support plate, and the motor and the speed reducer are connected by a pulley and a timing belt. Rotation mechanism.