JPH0742564Y2 - Rotating cylinder - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rotary cylinder that operates a mechanical chuck attached to a machine tool such as a lathe or a turret lathe.

Conventional technology and its problems The piston of the cylinder unit and the rotating shaft, which is rotatably supported by bearings, are integrally formed on the distributor unit provided at the rear of the cylinder unit. And the distributor body are interlocked with each other to move in the axial direction, and in front of this piston, there is a rotating cylinder provided with a piston rod for connecting with a mechanical chuck (Japanese Patent Publication No. 59-59).
-43242).

Problems to be solved by the invention When modifying a rotating cylinder that has been assembled (changing the cylinder size, changing from a cylinder with a check valve to a cylinder with a check valve, changing the stroke, etc.), remove it from the distributor unit. Convert the cylinder unit to a new one and reassemble. At this time, in the conventional rotary cylinder, the piston and the rotary shaft of the distributor unit are integrally formed so that they cannot be separated. Therefore, the cylinder unit cannot be replaced unless the distributor unit is disassembled in detail, resulting in a long replacement time. There was a problem.

Means for Solving the Problems In order to solve the above problems, according to the present invention, in a rotary cylinder having a distributor unit at the rear of a cylinder unit, the cylinder unit is provided with a rod that is exposed to the rear and is integrated with a piston. Has a rotary shaft which projects forward and has a flange formed on the outer periphery, and the rod rear end and the flange are integrally connected to the cylinder unit and the distributor unit through a tightening member so as to be divided into two parts without disassembling each unit. It was configured to do.

Action According to the above, when the rotary cylinder that has been completely assembled is remodeled, the rotary cylinder is divided into two units in a short time without disassembling the details, and the used distributor unit is replaced. The unit can be installed and can be replaced in a short time.

Embodiment In FIG. 1, a cylinder body 3 of a cylinder unit 2 which constitutes a front portion of a rotary cylinder 1 has a lid member 4 which is connected to a rear surface of a spindle (not shown) of a machine tool in front of the rotary cylinder 1. , The cylinder member 5 is fastened, and the cylinder chamber 6 is provided inside. A piston 7 is locked in the cylinder chamber 6 by a guide pin 12 and is slidably fitted therein. The piston 7 divides the interior of the cylinder chamber 6 into a front cylinder chamber 6a and a rear cylinder chamber 6b. The piston 7 is integrally provided with a piston rod 11a protruding forward from the lid member 4 and connected to a chuck (not shown) via a connecting rod (not shown), and a rod 11b exposed rearward from the cylinder member 5. ing. Rod 11b
A fitting hole 13 into which a front portion of a rotating shaft 18 of a distributor unit 16 described later is fitted is formed in the rear portion, one end is opened to the side surface and the front surface of the fitting hole 13, and the other end is respectively the front and rear cylinder chambers 6a. Opening paths 14 and 15 communicating with 6b are provided.

A rotating shaft 18 protruding forward is rotatably supported by a bearing in a distributor body 17 of a distributor unit 16 provided at the rear of the cylinder unit. In the rotary shaft 18, a flow path 19 that communicates the communication passage 15 with the supply / discharge port 32 provided in the distributor body 17 in a state where the rotary shaft is fitted in the fitting hole 13.
A flow path 21 that connects the communication passage 14 and the supply / discharge port 31 is formed. Also, on the outer periphery of the rotary shaft 18, a stepped flange
25 are provided. The rear portion of the stepped flange 25 has a cutout portion 27 for inserting and removing a tightening member (hereinafter referred to as a bolt) 26.
Is formed, and the front part is a notch groove that radially opens in the radial direction.
There is formed a large-diameter flange portion 29 having a portion 28 and abutting the rear end of the rod 11b (shown in FIG. 2). In addition, the collar 30 is held between the flange 25 and the bearing 33 at the front end of the distributor unit 16. The front portion of the rotary shaft is fitted into the fitting hole 13 of the rod 11b, and the end surface of the rod 11b exposed to the rear of the cylinder body 3 abuts on the front end surface of the large-diameter flange portion 29, so that the notch groove 28 and the bolt 26 And a large-diameter flange portion 29 is fastened to the rear end of the rod 11b.

Next, when the rotary shaft 18 is divided from the rod 11b, after loosening until the heads of the three bolts 26 come into contact with the collar 30, further loosening the bolts 26 causes the rotary shaft 18 to be pulled out from the insertion hole 13. Move and screw out. After that, the fastening member 26 is taken out from a location that is opened in the radial direction along the notch groove 28 provided in the large-diameter flange portion 29 of the flange 25, and is divided into two parts, the cylinder unit 2 and the distributor unit 16 (third part). (Shown in the figure).

According to this embodiment, since the large diameter flange portion 29 is provided with the cutout groove 28, the rear end surface of the large diameter flange portion 29 and the collar 30 are provided.
Since the bolt 26 can be taken out in the radial direction or tightened by mounting it from the radial direction even if the distance from the front end surface of the flange is small, it is possible to reduce the axial thickness of the flange 25, and only that much. The rotating shaft 18 can be shortened, and it is possible to prevent generation of vibration and reduction in rigidity due to rotation.

In addition, after dividing into two in this way, for example, a cylinder unit 2 with a check valve is prepared, and bolts 26 are provided in the three notch grooves 28 of the stepped flange 25 of the distributor unit 16.
Is inserted from the radial direction, then the rotary shaft 18 is inserted into the insertion hole 13, and the three bolts 26 are tightened.
Is completed.

Next, another embodiment will be described. In FIG. 4, the configuration is the same as that of the above embodiment except the rod rear portion, the flange formed on the front portion of the rotary shaft, and the fastening member. A screw 36 is formed on the outer periphery of the rear portion of the rod 11b. A stepped flange 37 is provided on the outer circumference of the rotating shaft 18 projecting to the front of the distributor main body 17, and the stepped flange 37 and the distributor main body are provided.
17 Collar 30 fitted between bearing 33 on the front end face
And a large-diameter flange portion 38 of the stepped flange 37, a tightening member (hereinafter referred to as a nut) 39 which is rotatably and axially movably engaged with the screw 36 is fitted. This nut
39 is fastened to the rear portion of the rod 11b with the large-diameter flange portion 38 interposed therebetween, and the rotary shaft 18 and the rod 11b are connected to each other to form the rotary cylinder 1.

When the rotary cylinder 1 is divided into two units, the nut 39 is unscrewed, brought into contact with the collar 30, and the rotary shaft 18 is moved in the direction in which it is pulled out from the fitting hole 13.
Completely remove the screw with the screw 36 at the rear of 11b and divide it into two units. In this embodiment, one nut 39 divides the cylinder unit and the distributor unit into two parts.
Further, since the reassembling is performed again, the work can be performed more easily than the case where the three fastening members are separately assembled in the above embodiment.

Effect of the Invention According to the present invention, when a rotary cylinder that has been completely assembled is modified, the distributor can be divided into two parts in a short time without disassembling the details. It can be installed, the stroke can be changed, the cylinder size can be changed, the check valve without cylinder can be replaced with a cylinder with a check valve in a short time, and resources can be saved.

[Brief description of drawings]

1 is a sectional side view of the rotary cylinder, and FIG. 2 is a sectional view of FIG.
II-II sectional view, FIG. 3 is a view showing a state in which the rotary cylinder of FIG. 1 is divided into two units, and FIG. 4 is a view showing another embodiment. 1 ... Rotary cylinder, 2 ... Cylinder unit, 7 ...
Piston, 11b …… Rod, 16 …… Distributor unit, 18 …… Rotary shaft, 25 …… Flange, 26 …… Tightening member

Claims (1)

[Scope of utility model registration request] 1. A rotary cylinder having a distributor unit at the rear of a cylinder unit, wherein the cylinder unit is integrally provided with a rod exposed to the rear, and the distributor has a rod projecting forward and a flange formed on the outer periphery. A rotary cylinder comprising the rod rear end and the flange integrally connected via a tightening member so that the cylinder unit and the distributor unit can be divided into two parts without disassembling each unit.