JPS6216763B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spindle slow drive device for a multi-spindle drilling machine.

In a multi-spindle drilling machine with a replaceable cluster plate as shown in Fig. 1, when the cluster plate is replaced and the main shaft of the spindle head is engaged with the clutch part, or when the spindle in the cluster plate is When installing a rotating tool, there may be cases where it is desired to change the stopped position of the spindle or main shaft by slightly rotating it. In such a case, conventionally, the main shaft or spindle has been manually rotated or the motor for the main shaft has been inched. However, manual operation is labor-intensive, and the inching motor rotates so fast that it is difficult to stop it at a desired position. An object of the present invention is to provide a spindle slow drive device for a multi-spindle drilling machine which can eliminate the above-mentioned drawbacks.

The configuration will be explained based on an embodiment shown in FIG. 1. The spindle head 4 of a multi-spindle drilling machine A
A main motor 1 is provided on the top, and a shaft bearing cylinder 5 is provided in the spindle head 4, which is movable up and down and has a rack 4' in the generatrix direction that meshes with a small gear 3 rotated by a gripping rod 2. A clutch piece _A1 is provided at the upper end of the main shaft 6, and a clutch piece A1 is provided on the upper end of the main shaft 6, and the rotating shaft 8 of the auxiliary motor 7, which is separately provided on the spindle head 4, is integrally connected to the rotating shaft 8 by means of a key 9 and a keyway 10. A slow-speed rotating shaft 11 is provided, which rotates at a constant speed, but can be displaced in the direction of the central axis of the rotating shaft 8, and a clutch piece _A2 that engages with the clutch piece A1 of the main shaft 6 is provided at the lower end of the slow-speed rotating shaft ₁₁ , A coil spring 13 is installed between the clutch piece A ₂ and the machine base 12 of the auxiliary motor 7.
A gear 14 is fixed in the middle of the main shaft 6, and is interlocked with the rotating shaft 15 of the main motor 1 by a gear train 16. A clutch piece is attached to the lower end of the main shaft 6.
A spindle ₁ for mounting a rotary tool 18 (for example, a drill) is provided on a cluster plate 17 which is provided with B 1 and is replaceably provided at the bottom of the spindle head 4.
9 and a gear train 20 to engage with a clutch piece B ₂ provided at the upper end of a drive shaft 21 . Incidentally, reference numeral 11' denotes a stopper portion of the fine-speed rotary shaft 11 which is a flange portion provided at the upper end of the fine-speed rotary shaft 11 and is engaged with the machine base 12 of the auxiliary electric motor 7.

The particularly important configuration here is that, as _shown in FIG. Piece
When the clutch piece _{A 1 at} the upper end of the main shaft 6 is fully engaged with the upper end of the main shaft 6, the flange part 11' at the upper part of the rotating shaft 11 is connected to the machine base 12 of the auxiliary motor 7. Since it is engaged and does not go down, clutch piece A ₂
Only at this time, for example, the limit switch 22 or the like is used to control the main motor 1 so that it can be energized and operated, and the main shaft 6, as shown in FIG. When the clutch is slightly raised and the clutch pieces B ₁ and B ₂ are slightly engaged, the limit switch 22 is activated so that the main motor 1 can no longer be energized.

In this embodiment, the auxiliary electric motor 7 itself is a very slow rotating electric motor, and the rotating shaft 8 is rotated at a very slow speed. However, the auxiliary electric motor 7 is made to have a normal speed, and the rotating shaft 8 is rotated at a very slow speed through a reduction gear. Alternatively, the drive shaft 21 of the cluster plate 17 may be
may be integrally provided on the upper part of the rotary tool mounting spindle 19.

Since this embodiment has the configuration as described above,
When replacing the cluster plate 17 and trying to drive the rotary tool installed on the new cluster plate 17, rotate the handle 2 clockwise to lower the main shaft 6 and move the clutch pieces B ₁ and B ₂ into the second As shown in the figure, when the limit switch 22 is fully engaged, the power transmission circuit to the main motor 1 is prepared by operating the limit switch 22, and when the motor start button (not shown) is pressed, the main motor 1 is started and the rotary tool is 18 can be driven.
In this case, since the upper clutch piece A ₁ of the main shaft 6 has completely separated from the clutch piece A ₂ , the rotation of the main shaft 6 has no effect on the auxiliary motor 7 , and even if the auxiliary motor 7 rotates, the The influence is not transmitted to the main shaft 6.

Next, if you want to slightly change the position of the rotary tool mounting spindle 19, slightly rotate the handle 2 in the opposite direction from the position shown in FIG. ₂ to the position shown in FIG. If you press the start button of the motor with the motors ₂ and 2 half-engaged, the main motor 1 will be de-energized by the limit switch 22, so it will drive the auxiliary motor 7, and since its speed is low, it will not be possible to attach a rotating tool. Since the spindle rotates slowly, it can be easily stopped at a desired position.

Next, if you want to rotate the main shaft 6 slightly, as shown in Figure 1, rotate the handle 2 further counterclockwise, completely release the clutch pieces B ₁ and B ₂ , and press the motor start button. Electric motor 1 does not start, and auxiliary motor 1
The main shaft 6 can be rotated slowly.

Since this invention has the above-mentioned structure and operation, the cluster plate 17 is replaced and the drive shaft 21 of the main shaft 6 and the rotary tool mounting spindle 19 is replaced.
There is a remarkable effect that the main shaft 6 or the drive shaft 21 can be easily rotated as loosely as desired.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of the main parts of the spindle slow drive device for a multi-spindle drilling machine according to the present invention, and FIGS. 2 and 3 are explanatory diagrams of the operation, respectively, in which 1 is the main electric motor, 4 is the spindle head, 6 is the main shaft, 7 is the auxiliary motor, 1
1 is a slow rotation axis, 17 is a cluster plate, 2
1 indicates a drive shaft, respectively.

Claims (1)

[Claims] 1 A main shaft 6 of a spindle head 4 driven by a main electric motor 1 is provided so as to be able to rise and fall freely, and a clutch B ₁ and a cluster plate 1 are provided at the lower end of the main shaft 6.
A clutch _B2 provided at the upper end of the drive shaft 21 of the rotary tool 18 mounted on the rotary tool 7 is detachably provided.
A clutch A ₁ provided at the upper end of the main shaft 6 and a clutch A ₂ provided at the lower end of the slow rotating shaft 11 driven by the auxiliary electric motor 7 are provided so as to be freely engageable and detachable.
When B ₁ and B ₂ are fully engaged, clutches A ₁ and A ₂ are completely disengaged, and when clutches B ₁ and B ₂ are half engaged, clutches A ₁ and A ₂ are engaged so that they are half engaged. A ₁ , A ₂ and clutches B ₁ , B ₂ are arranged, and a micro switch 22 is provided that sends an energization signal to the main motor 1 only when the clutches B ₁ and B ₂ are fully engaged. Spindle slow-speed drive device for multi-spindle drilling machines.