JP4540030B2 - Machine Tools - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a machine tool having a worm gear mechanism and an indexing device for indexing a machining position and the like.
[0002]
[Prior art]
Conventionally, as shown in FIGS. 4 and 5, the indexing device in the horizontal machining center 1 includes an indexing device 2 having a horizontal axis indexing table 4 having a horizontal rotation axis and an indexing surface 4a in the vertical direction. The vertical axis indexing table 6 is provided below the vertical axis of rotation and has a horizontal indexing surface 6a. The vertical axis indexing table 6 is rotatably provided on the indexing device 3. A motor 8 that drives the horizontal axis indexing table 4 is mounted above the horizontal machining center 1, and a motor 10 that drives the vertical axis indexing table 6 is located on the side of the vertical axis indexing table 6 positioned below the horizontal machining center 1. Is arranged.
[0003]
The horizontal axis indexing table 4 rotates about the horizontal axis and rotates on the vertical axis indexing table 6 together with the indexing device 2 about the vertical axis.
[0004]
[Problems to be solved by the invention]
In the case of the above-described conventional technique, the motor 10 that drives the vertical axis indexing table 6 is likely to be covered with cutting fluid and chips scattered from above, and these have caused problems of the motor 10. Further, in order to protect the motor 10 from these scattered objects, it is conceivable to cover the motor 10 with a cover having a high sealing degree, but there is a problem that providing the cover increases the cost of the machine. there were.
[0005]
The present invention has been made in view of the above-mentioned problems of the prior art, and the machining fluid and chips are not applied to the drive motor for indexing the machining position, etc. The purpose is to provide a machine.
[0006]
[Means for Solving the Problems]
The present invention provides a vertical axis indexing table having a machining spindle for rotating a tool in the horizontal direction and having a vertical axis of rotation, and a horizontal axis having a horizontal axis of rotation arranged above the vertical axis indexing table. A machine tool including an indexing table, each of which includes a drive motor that rotationally drives each indexing table, and each of the drive motors is disposed above the horizontal axis indexing table.
[0007]
Each of the drive motors is provided in an upper part of an upper indexing device including the horizontal axis indexing table, and the drive shafts of the drive motors are arranged in parallel in the vertical direction. One end of each drive shaft is connected to the drive shaft of each drive motor via a drive transmission mechanism, and a worm is provided at the other end of each drive shaft. The upper indexing device is fixed to the vertical indexing table and the one worm is pivotally supported. The worm wheel engaged with the one worm is fixed to a fixing portion of the lower indexing device.
[0008]
In the machine tool according to the present invention, the drive motors for the horizontal axis indexing table and the vertical axis indexing table are installed above the horizontal axis indexing table, and no cutting fluid or chips are applied to each driving motor.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of the present invention. A machine tool 11 of this embodiment is for a horizontal machining center, and includes an upper indexing device 12 for determining a machining position for horizontal axis rotation, and a vertical axis rotation. And a lower indexing device 13 for determining the machining position. The upper indexing device 12 is provided with a horizontal axis indexing table 14 that is driven by a rotating shaft arranged in the horizontal direction and has a vertical surface 14a. The lower indexing device 13 is provided with a vertical axis indexing table 16 that is driven by a vertical rotating shaft and has a horizontal surface 16a.
[0010]
The drive motor 18 that drives the horizontal axis indexing table 14 is fixed to the upper right side of the upper indexing device 12 that is the upper part of the machine tool 11, and the drive motor 20 that drives the vertical axis indexing table 16 is the machine tool 11. The upper part of the machine 11 is fixed to the upper left side of the upper indexing device 12.
[0011]
The horizontal axis indexing table 14 of the upper indexing device 12 is pivotally supported by a horizontal bearing 22 or the like, and is provided so as to be rotatable around a horizontal rotating shaft. On the base end side of the horizontal axis indexing table 14, A worm wheel 24 is fixed coaxially. The worm wheel 24 is engaged with a worm 26 having a vertical rotation shaft, and the worm 26 is connected to the drive motor 18 via a drive transmission mechanism 30 such as a drive shaft 28 and a gear train. The drive shaft 32 of the drive motor 18 is provided in the vertical direction and is located in parallel with the drive shaft 28. The drive shaft 28 is rotatably held by the upper indexing device 12 by bearings 34 and 35. The drive shaft 32 of the drive motor 18 and the drive shaft 28 may be coupled by a coupling.
[0012]
The vertical axis indexing table 16 of the lower indexing device 13 is pivotally supported by a vertical bearing 36 and the like, is provided so as to be rotatable around a vertical rotating shaft, and is provided integrally with the upper indexing device 12. Yes. In the lower indexing device 13, a vertical axis indexing table 16 is rotatably provided with respect to a fixing portion 40 fixed to the mounting position of the machine tool 11, and a worm wheel 42 is provided integrally with the fixing portion 40. . A worm 38 is pivotally supported on the vertical axis indexing table 16, and the worm 38 meshes with a worm wheel 42 provided integrally with the fixed portion 40.
[0013]
The worm 38 is provided with a rotation shaft in the horizontal direction, and is connected to a drive shaft 46 arranged in the vertical direction via an orthogonal gear mechanism 44. The drive shaft 46 is pivotally supported by the upper indexing device 12 and the vertical axis indexing table 16 by bearings 45 and 47. An upper end portion of the drive shaft 46 is connected to a drive shaft 50 arranged in a vertical direction via a gear train 48 which is a drive transmission mechanism. The drive shaft 50 is pivotally supported by the upper indexing device 12 by bearings 52 and 53. The drive shaft 50 is connected to the drive motor 20 via a gear train 54 that is a drive transmission mechanism. The drive shaft 56 of the drive motor 20 is provided in the vertical direction, is located in parallel with the drive shaft 50, and is also parallel to the drive shaft 32 of the drive motor 18 and located at the same height. The drive shafts 46 and 50 may be formed integrally.
[0014]
Next, the operation of the machine tool 11 of this embodiment will be described. The machine tool of this embodiment is provided with the worm 38 and the worm 38 because the worm wheel 42 is fixed when the drive motor 20 is rotated and the worm 38 is rotated via the drive shafts 50, 46 and the like. The vertical axis indexing table 16 rotates around the worm wheel 42. At this time, since the upper indexing device 12 is fixed to the vertical axis indexing table 16, the upper indexing device 12 and the drive motors 18 and 20 thereon also rotate together with the vertical axis indexing table 16 on the fixed portion 40. To do.
[0015]
The horizontal axis indexing table 14 of the upper indexing device 12 rotates the worm wheel 24 by rotating the worm 26 via the drive transmission mechanism 30, the drive shaft 28, and the like by the rotation of the drive motor 18. As a result, the horizontal axis indexing table 14 rotates at a desired angle integrally with the worm wheel 24, and the processing device 60 rotates at a predetermined angle.
[0016]
In the processing apparatus 11 of this embodiment, an upper indexing device 12 is fixed to a vertical axis indexing table 16 of a lower indexing device 13, a driving motor 18 that drives a horizontal axis indexing table 14 above the upper indexing device 12, and a vertical Since the drive motor 20 that drives the shaft indexing table 16 is installed in parallel, the cutting fluid and chips scattered from the machining position do not fall on the drive motors 18 and 20. Accordingly, the drive motors 18 and 20 are used in good condition, and motor failure can be reduced. Furthermore, since the drive motors 18 and 20 are arranged in parallel on the upper part of the upper indexing device 12, the installation space of the machine tool 11 can be reduced.
[0017]
The indexing device for a machine tool according to the present invention is not limited to the above embodiment, and the mounting position of each drive motor only needs to be above the upper indexing device, and its installation method and fixing member are not limited. .
[0018]
【The invention's effect】
According to the machine tool of the present invention, cutting fluid and chips do not adhere to the drive motor, and a good use state can be maintained for a long time. As a result, the motor is less likely to malfunction and the motor life can be extended. Further, by arranging the drive motors in parallel above the upper indexing device, the installation space for the motor can be reduced, and the entire device can be made compact.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a front side of a machine tool according to an embodiment of the present invention.
FIG. 2 is a plan view of the machine tool of this embodiment.
FIG. 3 is a longitudinal sectional view of the left side of the machine tool according to this embodiment.
FIG. 4 is a front view of a prior art machine tool.
FIG. 5 is a right side view of a conventional machine tool.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Machine tool 12 Upper index device 13 Lower index device 14 Horizontal axis index table 16 Vertical axis index table 18, 20 Drive motor 24, 42 Worm wheel 26, 38 Worm 28, 50, 54 Drive shaft 40 Fixing part

Claims (3)

A vertical axis indexing table having a machining spindle for rotating a tool in the horizontal direction and having a vertical axis of rotation, and a horizontal axis indexing table arranged above the vertical axis indexing table and having a horizontal axis of rotation. A machine tool provided with a drive motor for rotating and driving each indexing table above the horizontal axis indexing table. 2. The drive motors are provided above an upper indexing device having the horizontal axis indexing table, and the drive shafts of the drive motors are arranged in parallel in the vertical direction, respectively. Machine tools. One end of each drive shaft is connected to the drive shaft of each drive motor via a drive transmission mechanism, and the other end of each drive shaft is provided with a worm. The vertical index table has the upper index. 3. The apparatus according to claim 1, wherein the device is fixed and the one worm is pivotally supported, and the worm wheel engaged with the one worm is fixed to a fixing portion of the lower indexing device. Machine Tools.

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