JP2002235253A - Spindle apparatus for textile machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spindle apparatus for textile machinery, with which the number of revolutions and durability of a spindle and productivity are improved without causing problems such as the seizing of bearing part, etc., and productivity can be improved. SOLUTION: A spindle 2 for supporting a yarn feeding bobbin 13 is rotatably in a contact state from the radial direction supported by rolling and supporting mechanisms 4 and 4 at two top and bottom positions of a driving part 15 and supported rotatably in a noncontact state in the axial direction by a magnetic repulsive force of a permanent magnet 51 fixed to the spindle 2 and a permanent magnet 52 fixed to a stationary part side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a spindle device of a textile machine.

[0002]

2. Description of the Related Art Conventionally, in a textile machine such as a twisting machine or a covering machine, a yarn supplying bobbin is supported on a spindle rotating at a high speed, and the yarn unwound from the yarn supplying bobbin is twisted or twisted. It is wound around a core yarn that runs through the center of the spindle.

For example, in the case of a covering machine, a spindle is rotatably supported via a ball bearing 73 on a bracket 72 fixed to the machine base as shown in FIG. 5, and a drive belt 74 is brought into contact with the peripheral surface of the spindle 71. Although a large number of spindles 71 arranged in parallel are driven and rotated at the same time, the cover yarn b is spirally wound around the core yarn a running linearly, so that the cover yarn is smaller than the core yarn a. b, the number of turns of the cover yarn b needs to be increased in order to produce a covered yarn c with good covering properties.
The yarn is rotated at a high speed so as to be incomparable with the yarn feeding speed.

[0004] For this reason, if the operating speed of the covering machine is to be increased, the rotational speed of the spindle 71 is increased immediately after the rotation speed of the spindle 71 is increased even though the yarn supplying and winding portion of the core yarn a has sufficient speed. When the number of rotations reaches the allowable number, a problem such as image sticking occurs, which is an obstacle to improving productivity. Therefore, instead of directly supporting the spindle 71 with a ball bearing, the spindle is supported by a roller that rolls on the spindle from three directions, so that a roller that rotatably supports the roller with a deceleration effect due to the diameter difference between the spindle and the roller. It is considered to improve the durability of the bearing.

However, since the roller does not have a function of supporting the spindle in the axial direction, it is necessary to provide a separate thrust bearing. The rotation speed and durability of the spindle are limited by the allowable rotation speed of the thrust bearing.
There was a problem that the effect of the rolling support by the rollers could not be sufficiently exhibited.

[0006]

SUMMARY OF THE INVENTION In view of the above problems of the conventional spindle device, the present invention improves the spindle speed and durability without causing a problem such as seizure of a bearing portion, and improves productivity. An object of the present invention is to provide a spindle device of a textile machine that can be improved.

[0007]

In order to achieve the above object, a spindle device according to the present invention comprises a spindle supporting a yarn supplying bobbin and a rolling support mechanism at two positions above and below a driving unit, which are in radial contact with each other. , And rotatably supported in a non-contact state in the axial direction by a magnetic repulsive force of the permanent magnet fixed to the spindle and the permanent magnet fixed to the fixed portion side.

[0008]

FIG. 1 shows a spindle device 1 according to an embodiment of the present invention. In the figure, a spindle device 1 includes rolling support mechanisms 4, 4, which support a spindle 2 rotatably in a radial direction with respect to a bracket 3 (fixed portion).
And a magnetic support mechanism 5 for rotatably supporting the spindle 2 in a non-contact state with respect to the axial direction.

The spindle 2 penetrates the yarn introduction hole 11 at the center, and the disk-shaped rotor 1 is provided at the stepped portion near the lower end.
2 is fixed. The upper end portion is a support portion 14 that supports the yarn supplying bobbin 13. In addition, drive belt 1
The central portion where 6 contacts is a drive unit 15.

The bracket 3 is composed of an upper bracket 31, a lower bracket 32 positioned on both upper and lower sides of the drive unit 15, and a connecting portion 33 for connecting the upper bracket 31 and the lower bracket 32. 1 (right side in FIG. 1) is cut out substantially in half, so that the drive belt 16 can run while contacting the spindle 2. Upper bracket 31
Is a housing of the upper rolling support mechanism 4, and the lower bracket 32 is a housing of the lower rolling support mechanism 4 and the magnetic support mechanism 5.

As shown in FIGS. 1 and 2, the rolling support mechanisms 4 and 4 rotatably support the spindle with rollers 41, 41 and 41, respectively, which come into contact with the spindle 2 from three directions. The rotating shaft 42 of the roller 41 is mounted on the brackets 31 and 32 by ball bearings 43 on the upper and lower sides.
It is supported rotatably. The diameter of each roller 41 is larger than the diameter of the spindle 2, and each rotating shaft 42 rotates at a lower rotation speed than the spindle 2 by the difference in diameter.

As shown in FIG. 1, the magnetic support mechanism 5 fixes the permanent magnet 51 to the lower surface of the disc-shaped rotor 12, while
A permanent magnet 52 is fixed to the lower bracket 32 side so as to face the permanent magnet 51, and these permanent magnets 51 and 5 are fixed.
Numerals 2 are arranged such that N poles and S poles face each other, generate a magnetic repulsive force in the axial direction between the rotor 12 and the lower bracket 32, and rotate the spindle 2 in a non-contact state. I support it. Each of the permanent magnets 51 and 52 preferably has a uniform magnetic flux distribution in the circumferential direction, is magnetized concentrically in the illustrated example, and does not change its magnetic force with the rotation of the spindle 2.

As shown in FIG. 3A, the magnetic support mechanism 5 includes permanent magnets 51a, 51a on the upper and lower surfaces of the rotor 12.
b, while fixing the permanent magnets 52a, 52b by facing the upper and lower sides of the permanent magnets 51a, 51b,
Alternatively, as shown in FIG. 3B, the rotor 12 is composed of two upper and lower rotors, a permanent magnet 51a is provided on the upper surface of the upper rotor 12a, and a permanent magnet 5 is provided on the lower surface of the lower rotor 12b.
1b, the permanent magnets 52a, 52b are fixed by facing the upper and lower sides of each of the permanent magnets 51a, 51b.
The position of the spindle 2 in the axial direction may be fixed. If the strength of the permanent magnet 51 (51a, 51b) is sufficient, the permanent magnet may be directly fixed to the spindle 2 without providing the rotor 12.

The spindle device 1 configured as described above
The spindle 2 is rotatably supported in a non-contact state in the axial direction by the magnetic repulsive force of the permanent magnets 51 and 52 of the magnetic support mechanism 5, so that the magnetic support mechanism 5 has friction,
In addition to being able to withstand high-speed rotation and to be used semi-permanently with little wear and rotation resistance, a shaft load hardly acts on the rolling support mechanism 4 and a radial load is applied to the ball bearing 43 that rotatably supports the roller 41. Only the load acts and the radial load is distributed to the plurality of ball bearings 43, so that the load on each ball bearing 43 is greatly reduced. As described above, the spindle device 1 includes the magnetic support mechanism 5
, The effect of reducing the load on the rolling support mechanism 4 and the deceleration effect due to the difference in diameter between each roller 41 and its rotating shaft 42, greatly improve the rotational speed and durability of the spindle 2. It becomes possible.

For this reason, the rotation speed of the spindle is practically limited to about 25,000 rotations per minute due to the allowable rotation speed of the thrust ball bearing, but the non-contact support effect of the magnetic support mechanism 5 and the rolling support mechanism 4, for example, the diameter difference between each roller 41 and its rotating shaft 42 is reduced by 1 /
In the case of 2, the ball bearing 43 under the same conditions is 50
High-speed rotation of 000 rotations becomes possible. When the covering was actually performed at this speed, a covered yarn having good covering properties without problems such as cutting of the cover yarn was obtained.

FIG. 4 shows a spindle device 201 according to still another embodiment of the present invention. In the figure, a spindle device 201 serves as a magnetic support mechanism 205 on a top surface (231a) of an upper bracket 231 by a permanent magnet 252.
a, the permanent magnet 252 b is fixed to the lower surface (232 a) of the lower bracket 232, while the rotor 212 a is positioned above the upper bracket 231, and the lower bracket 2
32, the rotors 212b are fixed to the spindles 202, respectively, and an annular permanent magnet 251a is provided on the lower surface of the rotor 212a so as to face the permanent magnet 252a.
An annular permanent magnet 251b is fixed to the upper surface of the rotor 212b so as to face the permanent magnet 252b.

Each of the above permanent magnets 251a, 251b and 2
52a and 252b are a rotor 212a and a rotor 21 respectively.
2b and the upper and lower bracket lids 231a and 232a are fixed to peripheral grooves provided through nonmagnetic materials 251c and 252c. This is advantageous in terms of strength design and cost compared to the case where the entire rotors 212a and 212b and the entire bracket lids 231a and 232a are made of a nonmagnetic material. Further, each of the permanent magnets 251a, 251b and 252a,
252b is arranged such that the N poles and the S poles face each other, but 252b is magnetized so as to show NS polarity in the axial direction, and is magnetized so as to show NS polarity in the circumferential direction. Either may be used.

The rolling support mechanisms 204, 204 rotatably support the spindle with rollers 241, 241 and 241 that roll on the spindle 202 from three directions, similarly to the rolling support mechanism 4 shown in FIG. The upper and lower brackets 231 and 232 are provided with ball bearings 243 on the upper and lower sides of the rotation shaft 242 of each roller 241.
It is supported rotatably. 233a, 233b
Is a connecting member for connecting the upper and lower brackets 231,232.

The spindle device 201 of the above embodiment is
The spindle 202 is the permanent magnet 25 of the magnetic support mechanism 205
1a, 251b and 252a, 252b are supported in a non-contact state in the axial direction by the magnetic repulsive force, there is almost no friction, abrasion and rotational resistance, and the rotation of the spindle 202 is synergistic with the deceleration effect of the rolling support mechanism 204 The number and durability can be improved, and the rotor 212a and the rotor 212 can be improved.
Since b is disposed above and below the upper and lower brackets 231, 232, there is an advantage that the support is stable, the number of parts is small, and assembly and maintenance are easy.

In each of the above embodiments, the rolling support mechanism 4,
Although the case where a mechanism for supporting the spindle 2 and 202 with the rollers 41 and 241 rolling from three directions is provided as 204, even when a radial ball bearing is used as a rolling support mechanism, no axial load acts. By reducing the load, the rotation speed and durability of the spindles 2 and 202 can be improved. In the above-described embodiment, the case where the spindles 2 and 202 are driven by a belt has been described. However, a motor integrated with the spindles 2 and 202 (such as a PM motor, a DC brushless motor, or the like that can be rotationally synchronized) is used as a drive source. Can also. The spindle device of the present invention can be applied to various textile machines having a high-speed rotating spindle, such as a twisting machine, in addition to a covering machine.

[0021]

As described above, the spindle device of the present invention rotatably supports the spindle supporting the yarn supplying bobbin in two contact points in the radial direction by the rolling support mechanism at the upper and lower portions of the drive section. In the direction, the permanent magnet fixed to the spindle and the permanent magnet fixed to the fixed portion are rotatably supported in a non-contact state by a magnetic repulsive force. Does not act, reducing the load on the rolling elements, especially the load caused by the simultaneous application of both the axial load and the radial load. Almost no, high-speed rotation of the spindle is possible, the life of the device is extended, the yarn productivity is improved, and the service life of the mechanical equipment is improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a spindle device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a rolling support mechanism.

FIGS. 3A and 3B are side sectional views showing spindle devices according to different embodiments of the present invention.

FIG. 4 is a side sectional view showing a main part of a spindle device according to still another embodiment of the present invention.

FIG. 5 is a side sectional view schematically showing a covering machine.

[Explanation of symbols]

1,201 Spindle device 2,202 Spindle 3,231,232 Bracket (fixed part) 4,204 Rolling support mechanism 5,205 Magnetic support mechanism 12,12a, 12b, 212a, 212b Rotor 13 Yarn supply bobbin 15,215 Drive Parts 51, 51a, 51b, 52, 52a, 52b, 251
a, 251b, 252a, 252b Permanent magnet

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[Procedure amendment]

[Submission date] June 6, 2001 (2001.6.6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

The spindle device 1 configured as described above
The spindle 2 is rotatably supported in a non-contact state in the axial direction by the magnetic repulsive force of the permanent magnets 51 and 52 of the magnetic support mechanism 5, so that the magnetic support mechanism 5 has friction,
In addition to being able to withstand high-speed rotation and to be used semi-permanently with little wear and rotation resistance, a shaft load hardly acts on the rolling support mechanism 4 and a radial load is applied to the ball bearing 43 that rotatably supports the roller 41. Only the load acts and the radial load is distributed to the plurality of ball bearings 43, so that the load on each ball bearing 43 is greatly reduced. As described above, the spindle device 1 includes the magnetic support mechanism 5
, The load reduction effect of the rolling support mechanism 4 and the deceleration effect due to the diameter difference between each roller 41 and the spindle 2 can be combined to greatly improve the rotation speed and durability of the spindle 2. Become.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction contents]

For this reason, the rotation speed of the spindle is practically limited to about 25,000 rotations per minute due to the allowable rotation speed of the thrust ball bearing, but the non-contact support effect of the magnetic support mechanism 5 and the rolling support mechanism 4, the diameter ratio between each roller 41 and the spindle 2 is １ ／, for example.
In the case of the above, the ball bearing 43 under the same conditions is 500
High-speed rotation of 00 rotation is possible. When the covering was actually performed at this speed, a covered yarn having good covering properties without problems such as cutting of the cover yarn was obtained.

Claims (1)

[Claims] 1. A spindle supporting a yarn supplying bobbin is rotatably supported in a contact state from a radial direction by a rolling support mechanism at two upper and lower portions of a driving unit, and is fixed to the spindle in an axial direction. A spindle device for a textile machine, wherein the spindle device is rotatably supported in a non-contact state by a magnetic repulsive force of a permanent magnet and a permanent magnet fixed to a fixed portion side.