JPS62102906A - Tool spindle drive device in turret boring machine - Google Patents

Abstract

PURPOSE:To compact a captioned device and operate it at high speed by meeting the central axis of the belt stretched around a drive shaft and an inverted shaft with the rotational central axis of a turret head. CONSTITUTION:The end section of the fixed plate 7 provided in the head section of a turret head 4 supports the inverted shaft 9 provided with an inverted pulley section 8 at the center so as to be capable of rotation. A drive pulley 13 is provided to the lower end of the drive shaft 12 of the spindle motor 11 mounted to the upper section of a turret base 3 sharing the axis of the inverted pulley section 8. And a belt 4 is stretched around both pulleys 8 and 13. The central axis of this belt 14 must be set up so as to meet with the rotational central axis of the turret head 4 approximately. By thus putting the rotation transfer means from the drive shaft to a tool spindle together around the rotational central axis of the turret head, a captioned device can be compacted, and can cope with high speed operation because of the belt drive mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a drive device for a plurality of tool spindles provided in a turret head in a turret drilling machine.

(Prior Art) Conventionally, this type of tool spindle drive device has a transmission configuration that mainly uses a gear mechanism to transmit rotation from a spindle motor to a tool spindle of a turret head.

(Problems to be Solved by the Invention) Since this conventional configuration uses a gear mechanism, it is inevitably unable to cope with miniaturization and speeding up of the device itself.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and is a tool spindle in a turret drilling machine that can handle high-speed rotation transmission from the spindle motor to the tool spindle of the turret 1-head and can reduce the size of the device itself. The purpose of the present invention is to provide a drive device for the following.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a turret stand that is installed to be movable vertically or horizontally relative to a column of a drilling machine, and a turret stand that is rotatable relative to the turret stand. In a turret drilling machine comprising a turret head equipped with a plurality of tool spindles, the tool spindle is driven by a driven shaft linked to the tool spindle via a clutch and a spindle motor installed on the turret stand. The center axis of the belt, which is stretched between the pulleys between the two wheels, is approximated to the center line of rotation of the turret head relative to the turret base. This is to ensure consistency.

(Operation of the Invention) The drive shaft is rotated as the main shaft motor is driven, and the tool main shaft of the turret head is rotated along with the rotation of the drive shaft via the belt.

(Example) Hereinafter, an example of the present invention will be described in detail according to the drawings. In the figure, 1 shows the entire turret drilling machine, and in the front of the column 2, a turret stand 3 which also serves as a gear case is moved up and down by appropriate driving means. The turret head 4 is rotatably installed on the front side of the turret stand 3.

The cylindrical portion 4a of this turret head 4 is the turret base 3.
Furthermore, six tool holders @5 to 5 are rotatably supported on the same plane and parallel to the moving direction of the turret base 3 relative to the column 2 at equal intervals within the head part. . Note that a tool attachment portion 6 is formed on each tool spindle 5.

A fixing plate 7 having a square cross section is installed inside the turret stand 3 and the turret head 4, and a driven pulley part 8 is provided in the center at the tip of the fixing plate 7 located inside the head part of the turret head 4. A driven shaft 9 is rotatably supported,
The spline shaft portion 9a of this driven @9 is connected to each tool main shaft 5.
It faces the spline shaft portion 5a of the tool spindles 5 to 5 at one predetermined position, and further engages with the spline shaft portion 9a of the driven shaft 9 in a detachable manner. A clutch cylinder 10 is slidably fitted. Incidentally, this clutch cylinder 10 is operated by a lever means as appropriate.

A main shaft motor 11 is attached to the upper part of the turret stand 3, and a drive shaft 12 of this main shaft motor 11 faces into the turret stand 3, and a drive pulley is located at the lower end of the main shaft motor 11 on the same line as the driven pulley part 8. 13 is attached, and a belt 14 is stretched between both pulleys 8 and 13. However, the center axis of the belt 14 stretched between both pulleys 8 and 13 is set to approximately align with the rotation center line of the turret head 4.

Since the present invention is configured as described above, the drive pulley 13 is rotated by the rotation of the main shaft motor 7, and the driven pulley portion 8 is rotated via the belt 14, so that the driven pulley portion 8 is integrated with the driven pulley portion 8. The driven shaft 9, its spline shaft portion 9a, clutch cylinder 10, and tool spindles 5 to 5 connected via the spline shaft portion 5a are rotated.

In addition, in this embodiment, the turret stand 3 is located above and below the column 2 (
We have explained the mode of movement (elevating and lowering), but for column 2,
It can also be implemented in a type in which the turret stand 3 moves left and right (horizontally).

(Effects of the Invention) As described in detail above, the present invention includes a turret stand installed to be movable vertically or horizontally relative to a column of a drilling machine, and a plurality of A turret drilling machine comprising a turret head equipped with a tool spindle, a driven shaft linked to the tool spindle via a clutch, a drive shaft driven by a spindle motor installed on the turret stand, The center axis of the belt stretched between the pulleys provided on both shafts is approximately aligned with the center axis of rotation of the turret head relative to the turret base. Therefore, the means for transmitting rotation from the drive shaft driven by the spindle motor to the tool spindle was integrated at the center of rotation of the turret head.The structure of the device itself was simplified and its size was reduced. In addition, since it is belt driven, it has the advantage of being able to easily accommodate higher speeds.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, and FIG. 1 is an overall side view;
FIG. 2 is an enlarged sectional view of the main part. 3...Turret stand 4...Turret head 5
... Tool spindle 8 ... Driven pulley part 9 ...
- Driven shaft 11... Main shaft motor 12... Main shaft motor 13... Drive pulley 14... Belt

Claims (1)

[Claims] A turret drilling machine comprising a turret stand mounted to be movable vertically or horizontally relative to a column of the drilling machine, and a turret head rotatably mounted to the turret stand and provided with a plurality of tool spindles, as described above. A driven shaft connected to the tool main shaft via a clutch, a drive shaft driven by a main shaft motor installed on the turret stand, and a belt stretched between pulleys provided on both shafts. A drive device for a tool spindle in a turret drilling machine, characterized in that the center axis of a belt stretched over a pulley between both axes is approximately aligned with the center line of rotation of the turret head relative to the turret stand.