JP2899765B2 - Spindle unit for silk reeling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a spindle unit for a yarn winding machine mainly used in a spinning process and a twisting process.

<Prior Art> A conventional spindle unit for a yarn winding machine (hereinafter, simply referred to as a spindle unit) will be described with reference to FIG.

The spindle unit 20 is rotated by the case 21 via a cylindrical case 21 having a bottom and fixedly supported vertically to the base 30, a spring tube 22 press-fitted and internally fitted therein, and a roller bearing 23. And a spindle 24 which is freely supported and is fitted inside the spring tube 22.

Above the spindle 24, a large diameter is formed, and a bobbin (not shown) for winding is attached to the large diameter portion 24a. Further, an input pulley 25 also serving as a bobbin receiver is fixed to the spindle 24, and the input pulley 25 is rotationally driven by a driving source (not shown) via a belt 31 wrapped around the input pulley 25. It has become.

A slide bearing 26 that rotatably supports the conical portion 24b at the lower end of the spindle 24 is fixed to the lower end of the spring tube 22. Further, a damper 27 made of a spiral steel plate is provided between the lower end of the spring tube 22 and the case 21, and the spindle transmitted through the sliding bearing 26 is provided.
The vibration of 24 is quickly absorbed by the spring tube 22 and the damper 27. At this time, a space S1 surrounded by the case 21 and the spring tube 22, and a lubricating oil supply space S2 positioned below the roller bearing 23 and surrounded by the case 21, the spring tube 22, and the spindle 24. Are connected to each other via a spiral groove of the spring tube 22 and a passage 26a formed in the slide bearing 26, and both of these spaces S1 and S2 are used for absorbing vibration and lubricating the roller bearing 23. Lubricating oil (not shown) is stored.
The lubricating oil is supplied to the roller bearing 23 through the spiral groove of the spring tube 22 by the dynamic pressure generated by the rotational centrifugal force of the spindle 24.

By the way, in the actual spinning process and the like, a large number of these vertically oriented spindle units 20 are arranged in parallel, and the respective input pulleys 25 are connected to each other via a belt 31 so as to form an electric motor or the like. By driving the belt 31 by a single driving source, all the spindles 24 of the multiple spindle units 20 are collectively rotated.

However, since the rotation speed of the spindle 24 depends on the rotation speed of the electric motor, the speed of the spindle 24 cannot be increased except for improving the rotation performance of the existing electric motor.

On the other hand, the present applicant has proposed a spindle unit having a configuration as shown in Japanese Patent Application No. 1-176884. This spindle unit has a configuration in which a planetary roller type speed increasing mechanism is interposed between the spindle and the input pulley. The speed of the input rotary power is increased by the planetary roller type speed increasing mechanism to rotate the spindle at high speed. Can be.

<Problems to be Solved by the Invention> By the way, in the spindle unit of the above technology,
When the structure for supporting the lower end of the spindle is the same as that of FIG. 6, it has been found that the following inconvenience occurs.

That is, the spindle 24 can be rotated at a significantly higher speed than the conventional one, but in a predetermined high-speed rotation range exceeding the conventional rotation speed range, the vicinity of the slide bearing 26 supporting the lower end of the spindle 24 is improved. The temperature of the sliding bearing 26 rises rapidly, and the sliding bearing 26 seizes in a short time. Although a damper 27 is provided at the lower end of the spindle 24 to absorb the vibration of the spindle 24 due to the bending moment, the rotation of the spindle 24 becomes large due to the high speed rotation, and the damper 27 becomes large. Insufficient ability of 27 to absorb vibration.

Further, instead of the slide bearing supporting the lower end of the spindle 24, a ball bearing may be used, for example, as disclosed in U.S. Pat.
Although disclosed in Japanese Unexamined Patent Application Publication No. 3 (1994), the lubricating oil has high stirring resistance, causing the lubricating oil to rise in temperature and causing seizure at an early stage.

Further, the lubricating oil stored in the lubricating oil supply space S2 is
Although the upper roller bearing 23 and the planetary roller type speed increasing mechanism are supplied by the rotation of the spindle 24, the roller bearing 23 and the planetary roller type speed increasing mechanism are configured to rotate the spindle 24 at a high speed. The ability to supply lubricating oil has become insufficient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above facts, and a first object is to prevent seizure of a lower end of a spindle for a long time, and a second object is to prevent the spindle from absorbing vibration. The third object is to improve the ability of supplying the lubricating oil to the lubricating oil required portion arranged near the upper center of the spindle.

<Means for Solving the Problems> The present invention has the following configuration in order to achieve such an object.

The spindle unit for a yarn winding machine according to the present invention is provided with a spindle in which a bobbin for winding a bobbin is mounted vertically and a driving unit that is disposed near an axial center of the spindle and rotationally drives the spindle. A case provided in the spindle so as to surround a portion below the driving means and in which lubricating oil is stored, a needle bearing disposed below the inside of the case and supporting a lower end of the spindle, and the case; And a damper made of a cylindrical elastic material that is interposed in the annular space between the needle bearing and expands and contracts when vibration is applied to attenuate the vibration, and the damper is provided in the case during the expansion and contraction operation. It is characterized in that it exerts a pump action of sending lubricating oil existing around the damper to the drive means side.

The damper may be provided with through holes along the axial direction at several places on the circumference. Further, the driving means includes a planetary roller type speed increasing mechanism provided on the outer periphery of the spindle, an input pulley connected to a carrier of the planetary roller type speed increasing mechanism, and a rotational power applying device for applying rotational power to the input pulley. And can be composed of

<Operation> Since the lower end of the spindle is rolled and supported by a needle bearing having little stirring resistance, the rotation of the spindle is smooth. In addition, since a damper made of a cylindrical elastic material is interposed between the needle bearing and the case, even when vibration is applied to the spindle, the damper attenuates it and stabilizes rotation. Become. In addition, when the damper expands and contracts to attenuate the vibration, the pump exerts a pumping action to send the lubricating oil around the damper to the driving means above the damper, so that the lubricating oil is efficiently supplied to the driving means. For example, the lubricating property of the driving means is kept good, for example, it becomes easy to cause the driving means.

The above-described pumping action of the damper is achieved by providing through holes along the axial direction at several locations around the circumference of the damper. In other words, when the damper elastically expands and contracts,
The cross-sectional shape of the through-hole changes, and accordingly, the lubricating oil is drawn into the through-hole or pushed out of the through-hole, so that the lubricating oil flows to the drive means side. In addition, since the elastic contraction and deformation operation of the damper becomes smooth due to the presence of the through hole, the vibration damping effect is improved.

In addition, if the driving means is configured to include the rotation operation applying device and the planetary roller type speed increasing mechanism, even if the rotation power applying device serving as the rotation power source of the spindle is inexpensive and simple with a small rotation ability, the planetary Since the speed is increased by the roller type speed increasing mechanism, the high-speed rotation of the spindle can be achieved with inexpensive equipment.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

1 and 2 show a first embodiment of the present invention. The spindle unit 1 in the illustrated example includes a spindle 2 and
A planetary roller type speed increasing mechanism 3, an input pulley 4, an outer case 5, an inner case 6, a radial needle bearing 7, a thrust ball 8, and a damper 9; The lower portion of the planetary roller type speed increasing mechanism 3 is fixedly supported on the base 10 on the side, and the input pulley 4 is rotated by a driving source (not shown) via a belt 11 wrapped around the planetary pulley. The spindle 2 is driven to rotate via a roller type speed increasing mechanism 3. The driving means according to claim 1 is a planetary roller type speed increasing mechanism 3,
It corresponds to the input pulley 4, the belt 11, and a drive source not shown. The drive source, not shown, is provided in claim (2).
). The case described in the claims corresponds to the outer case 5.

Specifically, the spindle 2 is arranged in the vertical direction, and has a small diameter from near the center in the axial direction to the lower part.

The planetary roller type speed increasing mechanism 3 is a large diameter portion 2a of the spindle 2.
Is mounted on the outer periphery of the small-diameter portion 2b at the boundary between the outer ring 3A and the fixed outer ring 3A concentrically arranged on the outer periphery of the spindle 2, and the outer peripheral surface of the small-diameter portion 2b of the spindle 2 and the outer ring 3A. It is composed of a plurality of planetary rollers 3B interposed in pressure contact with the inner peripheral surface, and a carrier 3C that rotatably holds each of the planetary rollers 3B.

The carrier 3C of the planetary roller type speed increasing mechanism 3 includes an axial driving portion 3C1 disposed between the planetary rollers and a ring-shaped flange portion 3C2 connecting one end of each driving portion 3C1. In the carrier 3C, an input pulley 4 that is rotationally driven by a belt 11 is disposed coaxially with the carrier driving unit 3C1 on the outer peripheral side thereof, and is integrally formed so as to connect one end to a carrier flange 3C2. A first cylindrical body 12 and a second cylindrical body 13 are interposed between the input pulley 4 and the outer ring 3A. That is, the outer ring 3A is press-fitted and fixed to the inner peripheral surface of the first cylindrical body 12, and the first cylindrical body 12 is provided on the inner peripheral surface of the second cylindrical body 13 with a gap through two rubber dampers 14, 15. S3 is formed concentrically, and the second cylindrical body 13 has two rolling bearings 16, 17
Through the input pulley 4.

The outer case 5 is provided so as to surround the outer periphery of the small diameter portion 2a on the lower side of the spindle 2, and a lid 18 made of a sliding bearing material is attached to the lower end opening. The inner surface of the lid 18 is formed with a concavely curved centering seating surface 18a, and the thrust ball 8 is arranged between the centering seating surface 18a and the recess at the lower end of the spindle 2.

The upper end of the inner case 6 is fixedly supported by a radially inward flange of the first cylindrical body 12, and a space between the outer periphery of the spindle 2 and the inner periphery of the outer case 5 is divided into two radially inner and outer portions. To form two annular lubricating oil storage spaces S4, S5.

The needle bearing 7 is a shell type with a retainer, and is provided between the outer peripheral surface of the lower end of the spindle 2 and the outer case 5. A damper 9 is interposed between the needle bearing 7 and the outer case 5. Have been. By using the needle bearing 7, the stirring resistance to the lubricating oil is smaller than that of the conventional ball bearing, the temperature rise of the lubricating oil is reduced, and the load capacity of the same size is improved.

The damper 9 is made of rubber or the like formed in a cylindrical shape,
An axial through hole 9a is provided at several places around the circumference, and the two lubricating oil storage spaces S4 and S5 are connected to each other through the through hole 9a. The outer lubricating oil storage space S4
Of the first cylindrical body 12 and the through-hole 14a of the damper 14,
A gap S3 between the cylindrical body 13, a plurality of oil holes 12A provided in the thin cylindrical portion of the first cylindrical body 12 in the circumferential direction, and a plurality of radial holes provided in the outer ring 3A in the circumferential direction. It is connected to the track of the planetary roller 3B through the hole 3D. A circumferential annular groove wider than the opening width of the hole 3D is formed in the opening on the outer peripheral side and the inner peripheral side of the through hole 3D of the outer ring 3A.
Alignment with the oil hole 12A is easily performed.

 Next, the operation will be described.

When the input pulley 4 is driven to rotate by the belt 11, the planetary roller 3B is rotated and revolved by the carrier 3C connected to the input pulley 4 and integrally rotating,
Since the spindle 2 is driven to rotate by the frictional force from the planetary rollers 3B, the fine yarn is wound around a bobbin (not shown) mounted on the upper end of the spindle 2. The lower end of the spindle 2 rotated in this manner is supported by a needle bearing 7 and a thrust ball 8. on the other hand,
Although the spindle 2 is unbalanced and tends to vibrate as the fine yarn winding proceeds, this vibration is absorbed by the elasticity of the damper 9 at the lower end of the spindle 2 and the lubricating oil in the through hole 9a of the damper 9. Since it is attenuated, the eccentric rotation of the spindle 2 itself is suppressed. The vibrations around the planetary roller type speed increasing mechanism 3 are absorbed and attenuated by the two dampers 14 and 15.

In addition, the shape of the through-hole 9a changes as the damper 9 at the lower end of the spindle 2 expands and contracts to absorb vibrations. Lubricating oil outside the lubricating oil storage space
S4, so that sending the track portion of the planetary roller 3B through the through hole 3A ₁ void S3 and the outer ring 3A. Then, the lubricating oil that has lubricated the orbital portion of the planetary roller 3B is returned to the inner lubricating oil storage space S5.

In this way, a circulation path is formed in which the lubricating oil flows in the order of the inner lubricating oil storage space S5 → the outer lubricating oil storage space S4 → the gap S3 → the orbital portion of the planetary roller 3B → the inner lubricating oil storage space S5. Lubricating oil supply to the planetary roller type speed increasing mechanism 3 is performed stably.

By the way, the present invention is not limited to only those described in the above embodiments. That is, in the above-described embodiment, the planetary roller type speed increasing mechanism 3 is used to rotate the spindle 2 at high speed. However, instead of the planetary roller type speed increasing mechanism 3, a high frequency The present invention can be applied to a spindle unit having a motor structure. In addition, the present invention includes a damper made of a conventional spiral steel plate instead of the damper 9 at the lower end of the spindle 2. Further, in the damper 9 described in the above embodiment, valve mechanisms 19A and 19B as shown in FIGS. 3 and 4 may be provided in the upper opening of the through hole 9a. When such valve mechanisms 19A and 19B are provided, the lubricating oil sent upward by the pump action due to the expansion and contraction deformation of the damper 9 is prevented from returning downward, so that the lubricating oil is smoothly sent upward and the planetary rollers The capability of supplying the lubricating oil to the speed increasing mechanism 3 is further improved. Further, instead of the damper through-hole 9a in the above embodiment, a slit shape opened on the inner diameter side may be used as shown in FIGS. 5 (a) and 5 (b). In this case, the slits 9b can be easily formed on the flat rubber sheet by a flat press or the like, and the processing cost can be reduced. The flat sheet is rolled into a cylindrical shape.

<Effects of the Invention> As described above, in the present invention, the lower end of the spindle is rolled and supported by the needle bearing having low stirring resistance, and the vibration of the spindle is attenuated by the damper made of the elastic material. Since the lubricating oil is sent to the means side, even when the spindle is rotated at a high speed, smooth lubrication can be maintained over a long period of time with good lubrication.

[Brief description of the drawings]

1 and 2 relate to one embodiment of the present invention. FIG. 1 is a longitudinal sectional view showing the entire configuration of a spindle unit for a yarn winding machine. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. FIG.
FIGS. 3, 4 and 5 (a) and (b) are a longitudinal sectional view and a perspective view, respectively, showing only a damper according to another embodiment of the present invention. FIG. 6 is a longitudinal sectional view showing the entire structure of a spindle unit for a yarn winding machine according to a conventional example. 2 ... Spindle, 3 ... Planetary roller type speed increasing mechanism 4 ... Input pulley, 5 ... Outer case 6 ... Inner case, 7 ... Needle bearing 8 ... Thrust ball, 9 ... Damper 9a ... Damper Through-hole

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-48-64232 (JP, A) JP-A-55-142116 (JP, A) JP-A-61-191476 (JP, U) JP-A-39 26146 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) D01H 7/12 D01H 7/20

Claims (3)

(57) [Claims] 1. A spindle in which a bobbin for winding a bobbin is mounted in a vertical direction, a driving means disposed near an axial center of the spindle and rotationally driving the spindle, and the driving in the spindle. A case provided so as to surround a portion below the means and in which lubricating oil is stored; a needle bearing disposed below the inside of the case and supporting a lower end of the spindle; and the case and the needle bearing. A damper made of a cylindrical elastic material that is interposed in an annular space between the elastic members and attenuates vibration by expanding and contracting when subjected to vibration, and the damper is provided around the damper in the case along with the expanding and contracting operation. A spindle unit for a yarn winding machine, wherein the spindle unit exerts a pump action of sending existing lubricating oil to the driving means side. 2. The spindle unit according to claim 1, wherein said damper is provided with a through hole extending in an axial direction at a plurality of circumferential positions of said damper. 3. The spindle unit according to claim 1, wherein the driving means is connected to a planetary roller type speed increasing mechanism provided on an outer periphery of the spindle and a carrier of the planetary roller type speed increasing mechanism. A spindle unit for a yarn winding machine, comprising: an input pulley; and a rotational power applying device that applies rotational power to the input pulley.