JPS625876Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a burr prevention device for machining a rotating body that prevents burrs that occur when machining a rotary body having a rotating shaft such as a stepping motor.

A rotating body such as a stepping motor has a shape with a rotating shaft protruding from both sides of the main body, and after the rotating shaft etc. are assembled to the main body, it is necessary to process the mounting seat formed on the main body side. is common. That is, as shown in FIG. 1, mounting seats 2a projecting from the side surface of the main body 2 are formed at the four corners of the main body 2 of the rotating body 1. This mounting seat 2a is used when attaching the rotating body 1 to another member, but unless the rotating shaft 3 and this mounting seat 2a are formed perpendicularly to each other, an unreasonable force will be generated during attachment. Therefore, the mounting seat 2a
is generally processed after the main body 2 and rotating shaft 3 are assembled. When processing the mounting seat 2a, the main body 2 is held between the chuck 4 and the like on the fixed side, rotated, and processed using the cutting tool 5.
In this case, the main body 2 is processed while being held by the anti-rotation pawl 4a formed on the chuck 4, but since the rotating shaft 3 is pivotally supported by the main body 2, it can freely rotate on its own axis even during processing. . Further, a slight gap is formed between a bearing (not shown) and the like interposed between the rotating shaft 3 and the main body 2 side. For this reason, burrs (minor vibrations) inevitably occur during machining. If machining is performed with burrs still present, not only will the mounting seat 2a not be machined accurately, but machining efficiency will decrease.
Moreover, there arises a drawback that the life of the rotating body 1 itself is shortened.

On the other hand, since a slight gap 6 is formed between the side surface of the main body 2 and the outer periphery of the rotating shaft 3, there is a possibility that fine chips or the like may enter the inside of the main body 2 through the gap 6 during processing. If the chips are added, it will have a negative effect not only on the above-mentioned bearing but also on each element in the main body 2, resulting in a drawback that the quality and life of the product will be reduced.

The present invention was devised to solve the above-mentioned drawbacks, and its purpose is to effectively prevent burrs and chips from entering the main body during machining of rotary bodies, and to provide easy-to-handle machining of rotary bodies. An object of the present invention is to provide a burr prevention device.

In order to achieve the above-mentioned object, the present invention includes a gripping means for gripping the rotating shaft of a rotary body held by a chuck or the like, a pressing means for pressing the rotating shaft against the gripping means, and The present invention is characterized by a burr prevention device for machining a rotary body, which is comprised of a covering means that covers a gap between the rotary shaft and the main body on the rotating shaft side.

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIGS. 2 and 3, the rotating body 1 is held in place on the chuck 4 by means not shown. The chuck 4 is pivoted on the stationary side 7 and rotated by a belt 21.

The gripping means 8 includes a collet chuck 9 that grips the tip end side of the rotating shaft 3, and a spring A1 that engages with the collet chuck 9.
Consists of 0 etc. That is, on the fixed side 7,
A chuck holder 11 is attached, and a collect chuck 9 is inserted into the inner peripheral hole of the chuck holder 11. A spring A10 is inserted between the back side of the collector chuck 9 and the closed end 11a of the inner circumferential hole of the chuck holder 11 to bias the collector chuck 9 toward the rotating shaft 3. Also, correct check 9
An adjustment bolt 12 supported by the closed end 11a of the chuck holder 11 is attached to a threaded portion formed on the back side of the chuck holder 11.
are screwed together. Further, a gap δ is formed between the closed end 11a of the chuck holder 11 and the head of the adjustment bolt 12. With the above configuration, when the rotating shaft 3 is not engaged, the spring A10 pushes the collection chuck 9 toward the rotating shaft 3 by the gap δ, and waits in an open state. The rotating shaft 3 of the rotary body 1 held in a fixed position by the chuck 4 inserts its tip into the open collect chuck 9 and pushes the collect chuck 9 toward the spring A10. This results in
The collection chuck 9 closes the open mouth while compressing the spring A10, and grips the tip of the rotating shaft 3. The tapered shape of the collection chuck 9, the gap δ between the spring A10 and the adjustment bolt 12, etc. are set as appropriate depending on the shape of the rotating shaft 9.

Next, the pressing means 13 will be explained.

One end of a push rod 14 is connected to a piston 15 of a pneumatic cylinder (not shown) provided on the fixed side 7. The other end of the push rod 14 engages with the tip of a coaxial rotating shaft 3a that protrudes in the opposite direction to the rotating shaft 3 held by the gripping means 8 of the rotating body 1. That is, when the rotating body 1 is not held by the chuck 4 due to the operation of the piston 15,
The push rod 14 is positioned by retreating to the left in the figure, but when the rotary body 1 is clamped, it advances to the right and engages with the tip of the rotary shaft 3a, gripping the rotary shaft 3a, that is, the rotary shaft 3. Press against the means 8 side. Therefore, the rotating shaft 3 is fixed to the fixed side 7 by the gripping force of the gripping means 8 and the pressing force of the pressing means 13.

Next, the covering means 16 will be explained.

One end of a hollow cylindrical body 17 that surrounds the collection chuck 9 and projects toward the rotating shaft 3 is adjustably screwed onto the chuck holder 11 of the gripping means 8. A seal member 18 is pivotally mounted inside the other end of the cylindrical body 17 via a bearing 19 and surrounds the rotating shaft with a gap therebetween. Seal member 18
The distal end portion of the rotary body 1 is positioned so as to come into contact with the side surface of the main body 2 of the rotary body 1 while the rotary body 1 is held by the chuck 4. Further, the gap between the seal member 18 and the rotating shaft 3 is formed to be at least larger than the gap 6 described above. A spring B20 is installed between the bearing 19 and the collect holder 11 of the gripping means 8.
is provided. The seal member 18 is pressed against the side surface of the main body 2 by this spring B20. Further, by adjusting the length of the threaded connection between the cylindrical body 17 and the collet holder 11, the above-mentioned pressing force can be adjusted. The above-mentioned gap 6 is covered by the pressure contact between the cylindrical body 17 and the seal member 18.

Next, the operation of the embodiment will be explained.

When the rotating body 1 is held in a fixed position by the chuck 4, the tip of the rotating shaft 3 is held by the gripping means 8 as described above.
At the same time, the rotating shaft 3 is pressed toward the gripping means 8 by the push rod 14 of the pressing means 13. Further, the gap 6 between the rotating shaft 3 and the main body 2 is covered with a sealing member 18.

As described above, the main body 2 of the rotating body 1 is held by the chuck 4, and the rotating shaft 3 is fixed to the stationary side while being pressed, so that the occurrence of burrs is prevented. Furthermore, since the gap 6 on the processing side is covered, entry of chips and the like is prevented.

Note that since the seal member 18 rotates together with the main body 2 by the bearing 19, there is almost no wear on the seal member 18. Moreover, the seal member 18
can be easily replaced. Furthermore, in this embodiment, the rotating shaft of the rotating body 1 can be handled simply by inserting it into the gripping means, and no special incidental operations are required.

In this embodiment, a collection chuck 9 is used as the gripping means 8, but the gripping means 8 is, of course, not limited to this. Also, the pressing means 13 may be of a structure in which the rotating shaft 3 is pulled from the side of the gripping means 8 instead of being pressed by the push rod 14 from the opposite side of the gripping means 8.

As is clear from the above description, according to the present invention, it is possible to reliably prevent burrs and chips from entering the interior of the rotary body during machining of the rotary body, and to simplify handling.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating the machining state of the rotating body;
FIG. 2 is a cross-sectional view of an embodiment of the present invention and its surroundings, and FIG. 3 is a cross-sectional view of an embodiment of the present invention. 1...Rotating body, 2...Main body, 2a...Mounting seat, 3, 3a...Rotating shaft, 4...Chuck, 5...
...Cutter, 6...Gap, 7...Fixed side, 8...Gripping means, 9...Collection chuck, 10...Spring A, 11...Chuck holder, 11a...Closing end, 12...Adjustment bolt, 13... ...pressing means,
14... Push stick, 15... Piston, 16...
...Covering means, 17... Cylindrical body, 18... Seal member, 19... Bearing, 20... Spring B.

Claims (1)

[Claims for Utility Model Registration] 1. The main body of a rotating body having a rotating shaft protruding from the side of the main body is held by a chuck or the like provided on the stationary side to prevent cracking that occurs when processing the main body side. A burr prevention device for machining a rotating body, comprising: a gripping means provided on the stationary side and gripping a rotating shaft of the rotating body held by the chuck, and a pressing means pressing the rotating shaft against the gripping means; Rotating body processing characterized by comprising: a covering means provided on the fixed side and covering a gap formed between the outer periphery of the rotating shaft of the gripped rotating body and the main body on the processing side. Anti-flare device. 2. Practical use characterized in that the covering means is constituted by a cylindrical body that surrounds and encases the rotating shaft and is press-contacted in an adjustable manner to the side surface of the main body from which the rotating shaft projects. A burr prevention device for machining a rotating body as claimed in claim 1.