JPS5926780Y2 - Motor rotor unbalance correction chuck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chunk of a motor rotor in a machine for correcting imbalances present in the motor rotor.

To correct the unbalance of a motor rotor, the unbalance (.) is first measured, but this measurement is performed by marking a point on the outer surface of the motor rotor as a reference position, and calculating the angular position of the unbalance from this position. and the size using a balance tester.

In this case, the measured angular position and magnitude of the unbalance are usually stored as electrical signals.

After measuring the unbalance, the motor rotor is removed from the balancing/testing machine and installed in the correcting machine to correct the unbalance.

For this modification, insert the motor A-Y into the chuck of the modification machine,
This is done after rotating the chuck and aligning the correction position of the motor rotor with the position of the correction drill.

In this case, the memorized amount of unbalance angle from the balance tester becomes the rotation angle of the chuck, and the magnitude of the unbalance becomes the amount of advance (cutting amount) of the drill relative to the motor rotor.

When rotating the unbalance correcting machine so that the unbalance position (correction position) of motor A-Y matches the drill position, a reference position is also required for the chunk into which the motor rotor is inserted, and from this reference position The chuck is rotated by a required angle according to the unbalanced angular position to match the corrected position of the motor rotor with the drill position.

For this purpose, it is necessary to align the reference position of the motor rotor with the reference position of the chuck and insert the motor rotor into the chunk.

To match the corrected position of the motor rotor with the drill position, as described above, the drill is advanced with respect to the motor rotor according to the size of the unbalance, and the motor rotor is cut by the amount of the unbalance.

As described above, the chunk for mounting the motor rotor whose unbalance is to be corrected on the correction machine must be able to easily grip and release the shaft of the motor rotor, and at the same time, must not cause slippage during rotation. .

Conventional chunks are inserted into and removed from a cylindrical collet, and rotational slippage is prevented by frictional resistance between the collets.In actual use, rotational slippage occurs due to rapid positioning. It has the following disadvantages.

The present invention aims to provide a chuck that solves these conventional drawbacks.

This will be explained below according to the drawings.

FIG. 1 is a longitudinal sectional view of the chuck according to the present invention, showing a state in which the motor rotor 8, indicated by the chain double-dashed line, is gripped by the chunk.

Reference numeral 5 denotes a split collet divided in the axial direction, for example into four parts, into which a shaft 8' of a motor rotor 8 is inserted into and removed from an inner hole 5N at one end thereof.

Reference numeral 6 denotes an O IJ song fitted to the parallel outer peripheral portion 5' of the collet 5 at a position where the shaft 8' of the motor rotor 8 is inserted and removed.

1 is a cylindrical storage case that stores the split collet 5 coaxially and is attached to a rotating part of a correction machine (not shown) so that the collet 5 inside can be rotated around its axis. It looks like this.

The inner wall surface of one end of the storage case 1 corresponding to the one end of the collet 5 is a tapered inner peripheral surface 1 surrounding the OIJ song.
’ is formed.

Furthermore, a hole 1'' is bored in the end wall of this one end of the storage case 1, through which the parallel outer peripheral portion 5' of the collet 5 is exposed.

A bottom cover 2 constitutes a part of the storage case, and is integrally fixed to the case 1 with screws 10.

4 is a presser plate slidably arranged inside the storage case 1;
In the figure, the left end of the split collet 5 is joined to the right side thereof.

A push screw 3 is screwed into the bottom cover 2 of the storage case 1 so that it can be displaced in the axial direction, and the inner end (right end) of this push screw 3
is in contact with the left end surface of the presser plate 4.

This push screw 3 constitutes a displacement mechanism that displaces the split collet 5 in the axial direction, and by screwing the push screw 3, the split collet 5 is displaced toward the one end side (the right side in the figure) of the storage case 1, and the collet The upper OIJ song is pressed against the tapered inner peripheral surface 1' of the storage case 1.

Reference numeral I designates a holding frame for the motor rotor 8 that is attached to the case 1 through screws 9, and holds the motor rotor 8 at its reference position or in correspondence with the mark M on the case 1.

The mark M is installed on the case 1, and as mentioned above, the signal input to the correction machine rotates the case 1, and therefore the motor rotor 8, using the position of this mark M as the reference position, and the correction drill adjusts the correction position of the motor rotor 8. Position it at the position corresponding to.

The O IJ song fitted on the outside of the split collet 5 can be expanded and contracted to some extent in the radial direction of the ring, but
It should be made of a material whose cross-sectional shape will not substantially change due to external forces.

When the O-ring 6 is fitted onto the parallel outer peripheral portion 5' of the collet 5, the inner hole 5N will be slightly reduced because the collet 5 is of a split type.

01 when the shaft 8' of the motor rotor 8 is inserted into the inner hole 5N.
The split collet 5 expands outward against the elasticity of the Jing 6 to allow insertion of the shaft pin.

However, this expansion is restricted by the fact that the O-ring 6 is connected to the tapered inner peripheral surface 11 of the case 1.

Therefore, when the shaft 8' is inserted into the inner hole 5N of the collet 5, the O-ring will be expanded within a certain range, and the O-ring will be expanded within a certain range.
The elasticity of the IJ song produces a tightening effect on the split collet 5, thereby firmly gripping the shaft 8'.

If the diameter of the shaft 8' of the motor rotor 8 is small, screw in the set screw 3 and move the collet 5 to the right through the holding plate 4.
For example, move it to the position shown by the two-dot chain line in FIG.

In this case, the pressure point of the O-ring 6 against the tapered inner circumferential surface 1' is at a small diameter position, and the O-ring tightens the split collet 5 to firmly grip the inserted shaft 8'.

If the diameter of the shaft 8' is large, push the push screw 3 into the unscrewed collet 5 and displace it to the left to remove the tapered inner peripheral surface 1.
The shaft 8' is inserted into the collet 5 and gripped so that the contact pressure point of the OIJ song to ' is displaced to a larger diameter position.

If necessary, adjustment can be made by screwing in the set screw 3 again.

The above relationship is evident in FIG.

Note that FIG. 2 is an enlarged view showing the O-ring 6 fitted to the parallel outer peripheral portion 5' of the collet 5 and the tapered inner peripheral surface 1' of the case 1.

The expansion of the O-ring 6 is regulated by contact pressure with the tapered inner peripheral surface, and the component force of the contact pressure in the axial direction is applied to the OI.
It acts as a reduction force for the J song and makes the grip of the shaft of the motor more effective.

Although the chunk of the present invention is as described above, it is not limited to the illustrated example, and in particular, the mechanism for displacing the split collet in its axial direction is not limited to the illustrated example.

The shape and format of the mark M are also not limited to the illustrated example.

Since the present invention has been described in detail above, it makes it extremely easy to attach and detach the motor rotor, and also ensures reliable gripping.

In addition, even if the motor is of a certain size, it can be adjusted with a simple operation so that it can be firmly gripped, improving the efficiency of repair work.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the chuck according to the present invention, and FIG. 2 is an enlarged view of the main parts. 1... Cylindrical storage case, 1'... Tapered inner peripheral surface,
1...hole, 2...bottom cover, 3...push, 4...
・Press plate, 5...Split type collet, 5'...
Parallel outer circumference, 5N...inner hole, 6...0 ring, γ・
...Holding frame, 8...Motor rotor, 8'...Motor rotor shaft.

Claims (1)

[Scope of utility model registration request] A split collet into which the shaft of the motor rotor is removably inserted inside one end, an O-ring fitted to the outer periphery of the one end of the collet, and a split collet that accommodates the split collet coaxially and A cylindrical storage case in which the inner wall surface of one end with a hole through which the one end emerges is formed into a tapered inner peripheral surface surrounding the 01J ring, and the other end of the storage case has an axial The collet is displaceable in the storage case by being displaceable in the axial direction by contacting the other end of the collet in the axial direction, thereby pressing the O-ring against the tapered inner circumferential surface of the storage case. The motor rotor comprises a displacement mechanism and a reference position display mark for displaying a reference position of a motor rotor attached to and held in the storage case, and the storage case is installed in a motor rotor imbalance correction machine. Chuck for correcting motor rotor imbalance.