JP3174911B2 - Quill support device for machine tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quill-type machine tool for performing a boring operation, an end surface processing of a hole, and the like, and more particularly to a quill supporting device.

[0002]

2. Description of the Related Art FIG. 9 shows a conventional technique. In FIG. 9, reference numeral 1 denotes a case supported by a frame. An elongated cylindrical quill 2 is slidably fitted to the upper side of the case 1 in the left-right (front-rear) direction. The main shaft 3 is rotatably supported by the section. This spindle 3
Is projected from the quill 2 to the left, and a tool such as a drill is attached to this portion. A spline shaft 4 extending in the left-right direction in the quill 2 is fixed to the right portion of the main shaft 3, and the spline shaft 4 is spline-fitted to the drive cylinder 5 so as to be slidable. The driving cylinder 5 is connected to a pulley 7 rotatably mounted on the left end (rear end) of the case 1 via a connecting plate 6.
Connect to. The pulley 7 is connected to a spindle motor (not shown) via a belt.

[0003] A piston 8 is fitted to the lower side of the case 1 so as to be slidable in the left-right direction.
From the case 1 to the left (front), and the rod 8a
Is connected via a bracket 9 to the left end of the quill 2 described above. Then, the main shaft 3 is rotated in a predetermined direction by the main shaft motor via the pulley 7, the connecting plate 6, the drive cylinder 5, and the spline shaft 4, and in this state, the rod 8a, the bracket 9, and the The main shaft 3 is advanced to the left through the quill 2 as shown by the imaginary line in FIG. 9, and the workpiece is drilled or the outer periphery is processed by a tool attached to the left end of the main shaft 3.

[0004]

In the prior art, the pulley 7 (drive device) is mounted on the case 1 which supports the quill 2 (spindle 3) so as to be able to move back and forth.
The main shaft 3 rotates while moving in the axial direction with respect to the pulley 7. For this reason, an elongate spline shaft 4 corresponding to the stroke of the main shaft 3 in the front-rear direction and a drive cylinder 5 which is spline-fitted to the spline shaft 4 are required, and the structure of the torque transmission mechanism is complicated. In addition, since the hole on the case 1 side into which the quill 2 is fitted becomes long, there is a problem that it takes time and effort to process the hole. An object of the present invention is to provide a new quill support device for a machine tool that has solved the above-mentioned problems.

[0005]

Means for Solving the Problems The present invention is configured as follows to achieve the above object. That is, according to the invention of claim 1, a fixed support portion which is short in the front-rear direction and has a support hole at the center portion is provided integrally at the front portion of the frame so as to protrude upward, and is provided integrally with the rear portion of the frame . The fixed support on the top
A pair of left and right guide rails extending in the front-rear direction are integrally provided at a lower position of the holding portion, and a movable support member short in the front-rear direction is moved toward and away from the fixed support portion on the guide rails.
Movable in a direction, integrally connected to the rear end to the movable support with the front portion of the long tubular quill in the longitudinal direction slidably inserted into the fixed support, in said quill A driving device for rotatably supporting the tool mounting shaft, exposing the front surface of the tool mounting shaft to the outside from the front surface of the quill, and providing the movable support with a driving device for rotating the tool mounting shaft ; Move back and forth
This is a configuration in which a feeding device is provided. According to a second aspect of the present invention, a plurality of tool mounting shafts are provided in parallel on the quill, and each tool mounting shaft is connected to the drive device. The invention of claim 3 is:
A plurality of tool mounting shafts are provided in parallel on the quill, and each tool mounting shaft is connected to the drive device at a different rotation ratio. According to a fourth aspect of the present invention, a swivel device for rotating the quill about its axis is provided on the movable support.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a sectional side view showing a first embodiment of the present invention, and FIG. 2 is a II-II sectional view thereof. In FIG. 1, reference numeral 10 denotes a frame, and a front end portion (left portion) has an end-like cylindrical fixed support portion 11 centered on the longitudinal axis.
2, and a pair of left and right guide rails 14, 14 (linear guides) are attached to the rear upper surface by extending in the front-rear direction (left-right direction in FIG. 1), as shown in FIG. A box-shaped movable support 15 is supported on the rails 14 so as to be movable back and forth.

[0007] The front side of a cylindrical quill 17 is slidably inserted in the front-rear direction through a sleeve 12 through the fixed support portion 11, and the rear portion of the quill 17 is bolted to the movable support member. 15 integrally. The quill 17 has a length substantially corresponding to the length of the frame 10 in the front-rear direction. A tool mounting shaft (main shaft) 20 is inserted through the axial center of the quill 17 and the tool mounting shaft 20 is disposed in the front-rear direction. It is rotatably supported via a plurality of bearings 21.

The tool mounting shaft 20 is longer than the quill 17 and its left end is projected leftward from the quill 17, and a tool such as a drill (not shown) is mounted on the left end (front end) 20a. Further, a right end (rear end) 20b of the tool mounting shaft 20 is exposed in the movable support 15, and this portion is attached to the right end of the movable support 15 via a joint 23 (drive device). 22.

The movable support 15 is moved in the front-back (left-right) direction by a feeder 25. That is, as shown in FIGS. 1 and 2, a connecting piece 15 a protruding downward is formed at an intermediate portion in the width direction of the bottom, and the connecting piece 15 a is screw-connected to the feed screw 26 via the nut 16. This feed screw 26
As shown in FIG. 1, the left and right ends of the frame 1 are arranged in parallel with the quill 17 via bearings 27, 27.
The right end is connected to a servomotor 28 attached to the right part of the frame 10 via a joint 29, and is rotated forward and reverse by the servomotor 28. 27
Is a cover that covers the outer periphery of the quill 17 and the movable support 15 and is attached to the fixed support 11 described above.

According to the first embodiment, the tool mounting shaft 2
When a predetermined tool such as a drill is mounted on the left end 20a of the “0” and the tool motor 22 is started, the tool mounting shaft 20 is rotated in a predetermined direction via the joint 23. In this state, when the servo motor 28 is rotated forward, for example, so that the nut 16 moves to the left in FIG.
The movable support 15 is moved to the left (forward) via the quill 17, the quill 17, the tool mounting shaft 20, and the tool motor 22 are moved to the left with respect to the frame 10 as shown by the phantom line in FIG. And the drill attached to the tool mounting shaft 20 drills the front workpiece. Also,
When the servo motor 28 is reversed, the nut 1
6, the quill 17, the tool mounting shaft 20, and the tool motor 22 move to the right and return (the state shown by the solid line in FIG. 1) via the connecting piece 15a.

In this case, the quill 17 has a front portion supported by a fixed support portion 11 formed on the frame 10 and a rear portion locked by guide rails 14 of the frame 10 via a movable support 15. Quill 17
Is firmly supported by the frame 10 and moves left and right. Since the tool motor 22 is supported by the movable support 15 for moving the quill 17 and the tool mounting shaft 20 back and forth, the tool motor 22 and the tool mounting shaft 20 do not move relative to each other in the axial direction. The torque can be transmitted to the tool mounting shaft 20 by the joint 23 having a simple structure. The frame 1 in which the quill 17 is fitted
The fixed support portion 11 on the 0 side may be short and easy to process.

FIGS. 3 and 4 show a second embodiment. In FIG. 3, reference numeral 10 denotes a frame, 11 denotes a fixed support formed on the front portion of the frame 10, 14 denotes a guide rail, 15 denotes a movable support attached to the guide rail 14 so as to be able to move back and forth, and 17 denotes a quill. Has substantially the same structure as that of the first embodiment.

At the front (left) of the quill 17, four tool mounting shafts 30 (30a to 30d) are rotatably mounted at equal pitches in the circumferential direction around the axis of the quill 17. 17 has a transmission shaft 31
The driven gears 32 having the same number of teeth attached to the rear end (right end) of each of the tool mounting shafts 30 are rotatably mounted on the transmission shaft 31.
Meshes with the drive gear 33 attached to the front end (left end).

The transmission shaft 31 meshes an internal gear 34 attached to its rear end (right end) with an output gear 35 attached to the output shaft of the tool motor 22 attached to the movable support 15. The front end of each of the tool mounting shafts 30 protrudes forward from the quill 17 and a tool 36 such as a drill is mounted on these.

Reference numeral 37 denotes a cylinder-type feeder for moving the movable support 15 back and forth. A feed cylinder 38 is mounted at the rear of the frame, and its rod is connected to the movable support 1 by the movable support 15.
5 is connected to a connecting piece (both not shown) provided at a lower part of the movable support 1 and the movable support 1
The quill 17 and thus each tool mounting shaft 30 is moved back and forth via 5.

According to the second embodiment, when a predetermined tool, for example, a drill is mounted on each tool mounting shaft 30 and the tool motor 22 is started, the output gear 35, the internal gear 34, the transmission shaft 31, and the driving gear are driven. Each tool mounting shaft 30 is rotated via the driven gear 33 and the driven gear 32. When the feed cylinder 38 is extended in this state, the movable support 15, the quill 1
Each tool mounting shaft 30 is advanced through 7 so that a plurality of holes can be simultaneously drilled in the front workpiece. This is effective when drilling holes of equal pitch, such as mounting holes for wheels. The other structure is the same as that of the first embodiment.

FIGS. 5 to 8 show a third embodiment. In FIG. 5, 10 is a frame, 11 is a fixed support formed at the front of the frame 10, 14 is a guide rail, 15 is a movable support attached to the guide rail 14 so as to be able to move back and forth, and 17 is a quill. Has substantially the same structure as that of the first embodiment.

Two upper and lower tool mounting shafts 40 (40a to 40b) are rotatably mounted on the front portion (left portion) of the quill 17, and an end surface tool 46a for machining a hole end surface is mounted on the upper tool mounting shaft 40a. Also, a drilling tool (drill) 46b is mounted on the lower tool mounting shaft 40b. Each of the tool mounting shafts 40 is connected to a transmission shaft 41 mounted on a rear shaft portion of the quill 17 at a different rotation ratio.

That is, as shown in FIG. 8, a driven gear 42a mounted on the rear end (right end) of the upper tool mounting shaft 40a.
A secondary gear 43b formed at the left end of the first intermediate shaft 43,
A drive gear 45 attached to the front end (left end) of the transmission shaft 41 via a primary gear 43a attached to the right end of the first intermediate shaft 43.
Connect to. The lower tool mounting shaft 40b has a driven gear 42b mounted on its rear end (right end), a secondary gear 44b formed on the left end of the second intermediate shaft 44, and a second gear 44b.
4 is connected to a drive gear 45 of the transmission shaft 41 via a primary gear 44a attached to the right end.

The number of teeth of the upper secondary gear 43b is greater than the number of teeth of the lower secondary gear 44b.
The rotation speed of the upper tool mounting shaft 40a is set to be lower than the rotation speed of the lower tool mounting shaft 40b. The rear end (right end) of the transmission shaft 41 is connected to the output shaft of the tool motor 22 attached to the movable support 15 via a joint 47 as shown in FIG.

The movable support 15 is provided with a turning device 50 for rotating the quill 17 about its axis. This turning device 50 is as shown in FIGS.
That is, a cylindrical turning shaft 51 is provided at the rear shaft center of the quill 17.
Projecting toward the inside of the movable support 15, and
Are formed with spline-shaped engaging teeth 52 on the outer periphery of the. on the other hand,
The movable support 15 is provided with a rack 53 which moves in a direction perpendicular to the turning shaft 51 by hydraulic pressure (or air pressure), and the rack 53 is engaged with the engaging teeth 52.
Thus, the quill 17 is rotated forward and reverse via the turning shaft 51 by moving the rack 53 in the left-right direction in FIG. 7, and the tool mounting shafts 40a and 40b are turned upside down. In FIG. 5, reference numeral 25 denotes a screw-driven feeder for moving the movable support 15 back and forth, and has a structure similar to that of the first embodiment.

According to the third embodiment, the end tool 46a is mounted on the upper tool mounting shaft 40a, and the drilling tool (drill) 46b is mounted on the lower tool mounting shaft 40b. 17 is rotated so that, for example, the lower tool mounting shaft 40b is positioned on the lower side so as to face the workpiece W. In this state, when the tool motor 22 is activated and the quill 17 is advanced by the feeder 25, the drilling tool 46b mounted on the tool mounting shaft 40b drills a predetermined hole in the workpiece W.

Next, the quill 1 is fed by the feeding device 25.
7 is retracted, the quill 17 is rotated by, for example, 180 degrees from the above state by the turning device 50, and the tool mounting shaft 4 is rotated.
The end tool 46a attached to the workpiece 0a faces the hole formed in the workpiece W. In this state, when the quill 17 is advanced again by the feeder 25 while rotating the tool mounting shaft 40a, the end face tool 46a works (chamfers) the end face of the hole of the work material W. The above-described turning device 50 can be applied to the second embodiment.

[0024]

As is apparent from the above description, claim 1
According to the invention, the front portion of the quill is fitted and supported movably back and forth by the annular fixed support portion fixed to the front portion of the frame, and the movable support provided movably back and forth via the guide rail at the rear portion of the frame. The rear portion of the quill is locked by the body, and a drive device for rotating the tool mounting shaft is provided on the movable support, so that the quill can be firmly supported by the frame and moved back and forth. Further, since the driving device and the tool mounting shaft do not move relative to each other in the axial direction, the torque of the driving device can be transmitted to the tool mounting shaft by a simple transmission device. Further, the shaft length of the fixed support portion on the frame side into which the quill is fitted can be short, and the processing thereof can be facilitated.
Further, according to the invention of claim 2, a plurality of holes or end faces of the same shape can be machined at a stretch. Claim 3
According to the invention, the irregular shaped hole or the end face can be simultaneously processed. Further, according to the invention of claim 4, it is possible to carry out the processing without changing the associated different processing.

[Brief description of the drawings]

FIG. 1 is a sectional side view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional side view of a main part showing a second embodiment of the present invention.

FIG. 4 is a left side view of FIG. 3;

FIG. 5 is a sectional side view showing a main part of a third embodiment of the present invention.

FIG. 6 is a left side view of FIG. 5;

FIG. 7 is a sectional view taken along line AA of FIG. 5;

FIG. 8 is an explanatory sectional view showing a connection state between a tool mounting shaft and a transmission shaft.

FIG. 9 is a side view of a main part showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Frame 11 Fixed support part 12 Sleeve 14 Guide rail (linear guide) 15 Movable support body 15a Connecting piece 16 Nut 17 Quill 20 Tool mounting shaft (main shaft) 20a Left end (front end) 20b Right end (rear end) 21 Bearing 22 Tool Motor (drive device) 23 joint 25 feed device 26 feed screw 27 bearing 28 servo motor 29 joint 27 cover 30, 40 tool mounting shaft 31, 41 transmission shaft 32, 42a, 42b driven gear 33, 45 drive gear 34 internal gear 35 Output gear 36, 46a, 46b Tool 43 First intermediate shaft 43a Primary gear 43b Secondary gear 44 Second intermediate shaft 44a Primary gear 44b Secondary gear 47 Joint 50 Swivel device 51 Swivel shaft 52 Engagement tooth 52 Rack

Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B23B 47/18 B23B 39/18 B23B 39/16 B23B 47/30

Claims (4)

(57) [Claims] 1. A fixed support portion (11) which is short in the front-rear direction at a front portion of a frame (10) and has a support hole at a center portion thereof is raised.
And are provided integrally with each other , and a rear portion of the frame (10).
A pair of left and right guide rails (14) extending in the front-rear direction at the lower position of the fixed support portion (11) are integrally provided on the upper surface on the side of the fixed support portion (11). ) To the fixed support (11).
The front end of a tubular quill (17) that is long in the front-rear direction is slidably inserted into the fixed support portion (11), and the rear end of the quill is inserted into the movable support ( 15) and integrally support the tool mounting shaft (20) in the quill (17) so that it can only rotate.
The tool mounting shaft of the front surface of (20) is exposed to the outside from the front surface of the quill (17), said driving device for rotating the tool attachment axis (20) and (22) provided on the movable support (15), wherein Move the movable support (15) forward and backward
A quill support device for a machine tool, comprising a feed device (25) . 2. A plurality of tool mounting shafts (30) are provided in parallel on said quill (17), and each tool mounting shaft (3) is provided.
2. A quill support device for a machine tool according to claim 1, wherein said drive device is connected to said drive device. 3. A plurality of tool mounting shafts (40) are provided in parallel on said quill (17), and each tool mounting shaft (4) is provided.
2. A quill support device for a machine tool according to claim 1, wherein said drive device is connected to said drive device at a different rotation ratio. 4. The quill support device for a machine tool according to claim 2, wherein a swivel device for rotating the quill about its axis is provided on the movable support.