JPH0727813Y2 - Mobile rotary power plant - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a mobile rotary power unit suitable for, for example, a drilling device (including a multi-axis head attached).

[Prior Art] In a conventional drilling device, a drill unit or a multi-spindle unit is attached to an output shaft of a motor, an air cylinder is attached to a rear portion of the motor, and the air cylinder is expanded / contracted so that the motor and the drill unit or Drilling work was performed by moving the multi-axis unit forward and backward to a predetermined position.

[Problems to be solved by the device]

However, when the air cylinder is attached to the rear portion of the motor and the drill unit and the like are advanced and retracted as described above, there is a problem that the entire length becomes long and the attachment is inconvenient.

Further, there is a device in which a motor and a cylinder are arranged side by side to shorten the overall length, but there is a problem that an eccentric load is applied to a shaft or a piston, and partial wear occurs to shorten the life.

The present invention has been made in view of the above circumstances, and provides a mobile rotary power unit that has a short overall length, is provided with a stroke adjusting device, and is free from an eccentric load, and has a long life. With the goal.

[Means for Solving the Problems]

The movable rotary power unit according to the present invention, which has the above object, includes a cylinder having a fluid inlet / outlet on both sides, a motor body having a piston that moves in the center of the cylinder and slides around, and a rear portion of the motor body. A hollow screw shaft provided with the shaft core aligned with each other, a positioning nut screwed with the hollow screw shaft, and a receiving member attached to the rear portion of the cylinder for abutting the positioning nut to determine the forward limit of the piston. And a cover provided with.

[Action]

In the mobile rotary power unit according to the present invention, since the motor body is arranged inside the cylinder, the total length is shortened, and further, the shaft center is aligned with the rear portion of the motor body,
Since a screw shaft is provided, a positioning nut is screwed onto the screw shaft, and a cover having a receiving member is attached to the rear portion of the cylinder, the motor body can be moved by changing the position of the positioning nut. The stroke is determined. Further, since the cylinder, the motor body, and the screw shaft are aligned with each other and the piston and the positioning nut of the cylinder are not subjected to the eccentric load, eccentric wear or the like does not occur.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.

Here, FIG. 1 is a partially cutaway front view of a mobile rotary power unit according to an embodiment of the present invention, and FIG.
The right half shows the left side surface of the mobile rotary power unit, the left half shows the right side surface of the mobile rotary power unit), and FIG. 3 is a front view thereof.

As shown in FIGS. 1 to 3, a mobile rotary power unit 10 according to an embodiment of the present invention is provided with a cylinder 13 having air inlets and outlets 11 and 12 on both sides, and is disposed in the cylinder 13. The motor main body 14, a hollow screw shaft 15 arranged at the rear portion of the motor main body 14, a positioning nut 16 screwed to the hollow screw shaft 15, and a cover 17 arranged at the rear portion of the cylinder 13 are provided. Configured. These will be described in detail below.

The cylinder 13 is composed of a central pipe 18 and ring bodies 19 and 20 fixed to both ends of the pipe 18, and the air inlets and outlets 11 and 12 of the ring bodies 19 and 20 are provided to slide and move. The motor case 21 is sealed by O-rings 22 and 22a.

A piston 23 is formed on the outer side of the motor case 21, and a packing 24 is attached to a groove of the piston 23 to partition the inside of the cylinder 13 and the motor case 21.
A stator 25 and front and rear brackets 26 and 27 are provided on the inner side of the rotor, and a rotor 30 is rotatably attached to the center of the brackets 26 and 27 via bearings 28 and 29. It becomes an output shaft 31 on the side and projects to the outside. The motor main body 14 is configured to include the motor case 21, the brackets 26 and 27, the stator 25, and the rotor 30.

A retaining ring 32 is attached to the rear of the motor case 21,
The retaining ring 32 is sandwiched between a ring 33 and a ring 34, and the ring 34
A hollow screw shaft 15 is fixed to the. The hollow screw shaft 15 is provided with a tightening bolt 35 and a positioning nut.
16 are screwed together.

A cover 17 is provided at the rear portion of the cylinder 13, and the hollow screw shaft 15 is configured such that the hollow screw shaft 15 moves through a central hole of a receiving member 36 formed at the rear end of the cover 17. .

A cap 38 having a cord connection port 37 is provided on the other end of the hollow screw shaft 15 so that electric power can be supplied to the stator 25.

Therefore, when the mobile rotary power unit 10 is used, a drill unit or a multi-axis unit is attached to the output shaft 31, and an appropriate metal fitting is attached to the cylinder 11 so that the mobile rotary power unit 10 has a predetermined size. Install in place.

When compressed air is introduced from the air inlet / outlet 11, the piston 23 is pushed and the motor case 21 moves forward, whereby the motor body 14 moves forward. In this case, move the positioning nut 16 to the specified position and tighten the tightening bolt 35.
By fixing the positioning nut 16 at a predetermined position of the hollow screw shaft 15 by the above, when the motor main body 14 is moved forward, the positioning nut 16 comes into contact with the receiving member 36, so that the entire stroke is determined. be able to.

The piston 23 is retracted by introducing compressed air from the air inlet / outlet 12, so that the motor body 14 can be retracted.

[Effect of device]

As is clear from the above description, the movable rotary power unit according to the present invention has the motor body inside the cylinder, so that the total length can be shortened and the whole can be compactly housed. .

Then, the cylinder, the motor body, and the hollow screw shaft for positioning are arranged so that the shafts are aligned with each other, so that when the positioning nut contacts the receiving member, the eccentric load does not work on the piston. Eccentric wear can be prevented and a long life can be obtained.

Further, the force for tilting the output shaft of the motor body is not generated, and the drilling work can be performed with high accuracy.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a mobile rotary power unit according to an embodiment of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a front view of the same. [Explanation of reference symbols] 10 ... Mobile rotary power unit, 11, 12 ... Air inlet / outlet, 13
…… Cylinder, 14 …… Motor body, 15 …… Hollow screw shaft, 16 …… Positioning nut, 17 …… Cover, 18 …… Pipe, 19, 20 …… Ring body, 21 …… Motor case, 22,
22a …… O ring, 23 …… Piston, 24 …… Packing, 2
5 …… stator, 26, 27 …… bracket, 28,29 …… bearing, 30 …… rotor, 31 …… output shaft, 32 …… stop ring,
33, 34 …… ring, 35 …… tightening bolt, 36 …… receiving member, 37 …… cord connection port, 38 …… cap

Claims (1)

[Scope of utility model registration request] 1. A cylinder having a fluid inlet / outlet on both sides, a motor main body having a piston that moves in the center of the cylinder and slides around, and a hollow provided with a shaft center aligned with a rear portion of the motor main body. A screw shaft; a positioning nut screwed into the hollow screw shaft; and a cover provided with a receiving member attached to the rear portion of the cylinder for abutting the positioning nut to determine the forward limit of the piston. A mobile rotary power plant characterized by.