JPH08257865A - Table feeder device - Google Patents

Abstract

PURPOSE: To provide a table feeder device which can prevent pitching and yawing also can prevent chattering a moving table, in a connecting device of the table and a nut. CONSTITUTION: In a table feeder device comprising guides 30, 30 of guiding a table 10 in an X direction, rotating feed screw 20, nut 40 screwed to this feed screw 20 and a connecting member of connecting this nut 40 to the table 10, the connecting member is constituted singly by a parallel link 6Y turned around an axis orthogonal to an X axis or by parallel links 6Y, 6Z provided to be orthogonal to each other.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table feeding device, and more particularly to a table and nut connecting device.

[0101]

2. Description of the Related Art As a conventional technique, a moving table is supported by a guide and a rotating feed screw is used to absorb a processing accuracy error such as horizontality and parallelism between the guide and the feed screw. There is a matching nut and a moving table having the nut fixed, in which the moving table and the feed nut are connected via an elastic body (for example, Japanese Utility Model Laid-Open No. 6-62390).

[0092]

However, while it is possible to absorb machining errors such as horizontality and parallelism between the guide and the feed screw and prevent pitching and yawing, there is an elastic body between the moving table and the feed nut. Since they are connected, there is a possibility that the moving table may rattle due to torsional vibration due to insufficient rigidity of the elastic body against torque fluctuations when the moving table is started or when the speed fluctuates rapidly. Therefore, an object of the present invention is to provide a table feeding device capable of preventing pitching and yawing and preventing rattling of a moving table.

[0093]

[Means for Solving the Problems] Guides 30 and 30 for guiding the table 10 in the X direction, a rotating feed screw 20, a nut 40 screwed to the feed screw 20, and a nut 40 and the table 10. In a table feeding device including a connecting member to be connected, the connecting member is a parallel link 6Y alone which rotates about an axis orthogonal to the X axis, or
The parallel links 6Y and 6Z are provided so as to be orthogonal to each other.

[004]

By the above means, the driving force due to the rotation of the feed screw 20 is transmitted to the table 10 via the highly rigid parallel links 6X and 6Y.

[0095]

EXAMPLE An example of a table to which the present invention is applied will be described with reference to FIG. The table 10 is slidably supported by guides 30 provided in parallel. A holder 1 is provided on the lower surface of the table 10, and the nut 40
Is fixed. The feed screw 20 is screwed into the nut 40, and the feed screw 20 is rotated by the motor 50 to move the table 10 in the X direction. An embodiment of the present invention will be described below with reference to FIG. As shown in FIG. 1A, the leg portion 11 of the T-shaped holder 1 extending in the Y direction is
An X-direction hole 12 through which the feed screw 20 is inserted is provided.
A pair of left and right notches 13Y and 13Y with respect to the axis of the feed screw 20 are provided on both side surfaces of the leg portion 11 in the Y direction. The protrusions of the notch 13Y have pins 14Y, 14
Pin holes 15Y and 15Y for fixing Y in parallel are fed screw 2
It is provided in the Y direction symmetrically with respect to the axis of 0. Pin 1
One ends of bars 3X and 3X in the X direction are rotatably fitted in 4Y and 14Y. As shown in FIG. 2B, the pin 14Y and the bar 3X have a diameter d of the pin 14Y and a bar 3X.
The relation of the diameter D of the hole 3H provided in the above is D> d, and the bar 14X is loosely engaged with the pin 14Y to freely move in the X direction.
When the width of the notch 13Y is B and the width of the bar 3X is b, B> b, and the bar 3X is freely movable in the Y direction. At the other ends of the bars 3X and 3X, an intermediate holder 4 is provided in parallel with the leg portion 11. At approximately the center of the intermediate holder 4, a nut 40 screwed with the feed screw 20.
Is fixed. On the side surface of the intermediate holder 4, notches 43Y and 43Y parallel to the pair of notches 13Y and 13Y provided on the leg 11 are provided symmetrically with respect to the axial center of the feed screw 20. At the protruding portion of the notch 43Y, the pin 14
Pin holes 45Y and 45Y for fixing Y and 14Y in parallel are provided in the Y direction symmetrically with respect to the axis of the feed screw 20. The other ends of the bars 3X and 3X are rotatably engaged with the pins 14Y and 14Y. 4 pins 14Y and 3 bars
A parallel link 6Y that rotates about the Y axis by X and 3X is configured.

When the feed screw 20 rotates, the nut 40 moves to the X position.
Direction, the intermediate holder 4 is driven in the X direction. The thrust of the intermediate holder 4 is transmitted to the leg portion 11 of the holder 1 via the parallel link 6Y. At this time, the error in the Z direction between the guide 30 and the feed screw 20 is caused by the rotation of the parallel link 6Y.
The direction error is absorbed by the loose engagement of the bar 3X and the pin 14Y. FIG. 2 shows a second embodiment. In this embodiment, a notch 43Z orthogonal to the notch 43Y is added to the intermediate holder 4 of the embodiment, and a pin 44Z, at a position not interfering with the pin holes 45Y, 45Y is provided at a protruding portion of the notch 43Z.
Pin holes 45Z and 45Z for fixing 44Z in parallel are provided in the Z direction symmetrically with respect to the axis of the feed screw 20. One ends of the bars 4X and 4X in the X direction are rotatably fitted into the pins 44Z and 44Z. Pin 14Y and bar 3X,
The fitting of the pin 44Z and the bar 4X is slightly fixed as compared with the embodiment, and the notch 13Y, the bar 3X, and the notch 43Y.
The gap between the bar 3X and the notch 43Z and the bar 4X is almost eliminated. At the other ends of the bars 4X, 4X, an end holder 5 is provided in parallel with the intermediate holder 4. The end holder 5 is fitted with a nut 40 that is screwed into the feed screw 20.
It is fixed. Notch 43Y provided in the intermediate holder 4,
Notches 53Z, 53Z orthogonal to 43Y are provided in the Z direction. A pin 44 is provided on the protruding portion of the notch 53Z.
Pin holes 55Z and 55Z for fixing Z and 44Z in parallel are provided in the Z direction symmetrically with respect to the axial center of the feed screw 20. The pins 44Z, 44Z have bars 4X, 4X in the Z direction.
The other end is rotatably fitted. The four pins 44Z and the bars 4X and 4X form a parallel link 6Z that rotates about the Z axis. The holder 1, the parallel link 6Y, the intermediate holder 4, the parallel link 6Z and the end holder 5 constitute a highly rigid connecting member.

When the feed screw 20 is rotated by the motor 50, the nut 40 screwed onto the feed screw 20 drives the end holder 5 in the X direction. The thrust of the end holder 5 is transmitted to the intermediate holder 4 via the parallel link 6Z and further transmitted to the leg portion 11 of the holder 1 via the parallel link 6Y. At this time, the error in the Y direction between the guide 30 and the feed screw 20 is absorbed by the rotation of the parallel link 6Z, and the error in the Z direction is absorbed by the rotation of the parallel link 6Y.

[0085]

With the above construction, the driving force generated by the rotation of the feed screw is absorbed by the rotation of the parallel link and is transmitted to the table with high rigidity. It does not cause whirling vibrations.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG.
The partial cross section figure of a notch part.

FIG. 2 is a perspective view showing a second embodiment of the present invention.

FIG. 3 is a perspective view showing an example of a table to which the present invention is applied.

[Explanation of symbols]

 1 Holder 11 Leg 12, 42 Hole 13Y, 43Y, 43Z, 53Z Notch 14Y, 44X Pin 15Y, 45X, 45Y Pin Hole 3X, 3Y Bar 4 Intermediate Holder 5 End Holder 6X, 6Y Parallel Link 10 Table 20 Feed Screw 30 Guide 40 Nut 50 Motor

Claims (3)

[Claims] 1. A guide for guiding the table in the X direction,
A feed screw provided in parallel with the guide, a nut screwed to the feed screw, and a table feed device including a connecting member that fixes the nut to one end and connects the other end to the table, wherein the connecting member is A table feed device comprising a parallel link that rotates about an axis orthogonal to the X axis. 2. The table feeding device according to claim 1, wherein the parallel links are one set. 3. The table feeding device according to claim 1, wherein the parallel links are two sets provided so as to be orthogonal to each other.