JPS5930807B2 - Support device for rotor shaft in open-end spinning machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for rotatably supporting a rotor shaft in an open-end spinning frame using a twin disk mechanism.

In open-end spinning machines, the rotor shaft supported by a twin-disk mechanism is rotationally driven by a drive belt running perpendicularly on the rotor shaft, so the perpendicular relationship between the rotor shaft and the drive belt is If there is even a slight deviation, an axial force, that is, a thrust force will act on the rotor shaft, causing a positional deviation in the rotor shaft.

Therefore, the rotor shaft and the drive belt must be maintained at a perfect right angle, but it is extremely difficult to precisely set the right angle.

Further, the thrust force acting on the rotor shaft is also generated by meandering of the drive belt.

Therefore, various means have been proposed and implemented in the past in order to prevent the rotor shaft from shifting its position. For example, the drive belt or the support disk of the twin disk mechanism is set at an angle slightly offset from the perpendicular direction to the rotor shaft. The thrust force is actively applied to the rotor shaft in one direction, and the rotor shaft is held at a specified position by receiving the rotor shaft with a thrust bearing at the end of the shaft in the direction in which the thrust is applied. There is a format.

However, it is undesirable to arrange the drive belt or the support disk slightly from the direction perpendicular to the low i-axis from the standpoint of design and assembly. For example, Japanese Patent Publication No. 4
7-25430), a new problem arises in that the circumferential surface of the support disk contacts the rotor shaft in a part of the width direction, resulting in significant wear of the contact area and, as a result, misalignment of the rotor shaft. There was a drawback that caused

The present invention provides a helical groove or a groove of a similar shape to the contact area between the rotor shaft and the support disk to actively apply thrust in one direction to the rotor shaft, and to apply the thrust to the rotor shaft. The present invention attempts to eliminate the above-mentioned drawbacks of the conventional art by providing a support device that can maintain the rotor shaft at a specified position at all times by receiving the rotor shaft with appropriate thrust bearings.

Hereinafter, illustrated embodiments embodying the apparatus of the present invention will be described in detail.

First, the embodiment shown in FIGS. 1 to 3 will be described.

The twin disk mechanism for supporting the rotor shaft 2 fixed to the rotor 1 is composed of four support disks 3 to 6 arranged at predetermined intervals in the front, rear, left and right directions as shown in the figure.
These support disks 3 to 6 are rotatably supported at their shaft portions by bearings 7 and 8.

The rotor shaft 2 is rotatably supported in the gap between the pair of support disks 3, 4 and 5, 6 of the twin disk mechanism, and runs approximately at the center of the rotor shaft 2. It is rotationally driven by a drive belt 9.

Helical grooves 3a to 6a are formed on the circumferential surface of each of the support disks 3 to 6, respectively, inclining in the same direction so as to apply thrust in one direction to the rotor shaft 2 when the rotor shaft 2 rotates. In this embodiment, the direction of inclination of the helical grooves 3a to 6a is set so as to apply a thrust toward the end of the shaft as indicated by the arrow in the figure to the rotor shaft 2.

The shaft end side of the rotor shaft 2 includes a ball 10 that rollably contacts the shaft end surface of the rotor shaft 2, a spring 11 that elastically supports the ball 10, and a casing 12 that houses and holds these. A thrust bearing 13 is arranged,
When the rotor shaft 2 rotates, the helical grooves 3a to 6a receive the rotor shaft 2, which is given a positive thrust toward the shaft end.

That is, in this embodiment, a positive thrust in one direction is applied to the rotor shaft 2 by the helical grooves 3a to 6a,
This is received by the thrust bearing 13. Therefore, even if a thrust force is applied to the rotor shaft 2 toward the rotor side or the shaft end side due to the running of the drive belt 9, the rotor shaft 2 is maintained at the specified position. and its positional shift is prevented.

In the embodiment shown in FIG. 4, the direction of inclination of the helical grooves 3a to 6a formed in each of the support disks 3 to 6 is reversed to that of the embodiment described above, and the direction of thrust application when the rotor shaft rotates is directed to the rotor as shown by the arrow in the figure. A movable magnet plate 14 fixed to the end of the rotor shaft 2 as the thrust bearing 13;
A fixed magnet plate 15 is disposed opposite to the movable magnet plate 14 so that the same poles face each other and repel each other, and the fixed magnet plate 1
5 and a holder 16 for supporting the holder 5.

Therefore, the rotor shaft 2, which receives the thrust toward the rotor by the helical grooves 3a to 6a during rotation, has both magnet plates 14,
It is received by a thrust bearing 13 that utilizes the 150 repulsion force and is secured at a specified position.

The embodiment shown in FIG.
Helical grooves 2a, 2 with the same inclination direction at the contact portion with 6
b are provided respectively to apply a thrust toward the shaft end to the rotor shaft 2, and this is received by a thrust bearing 13 having the same structure as the thrust bearing 13 shown in FIG.

Therefore, in any of the embodiments shown in FIGS. 4 and 5, even if the thrust force by the drive belt 9 acts on the rotor shaft 2, the rotor shaft 2 will be affected in the same way as in the embodiments shown in FIGS. It is possible to secure it at a specified position and prevent positional shift.

Note that the helical grooves 3a to 6a in the above-described embodiments may be formed in at least one of the support disks 3 to 6, and the grooves are not limited to helical grooves but may be grooves of similar shapes. That is, any shape can be used as long as it can apply a thrust to the rotor shaft 2 when the rotor shaft 2 rotates.

As described above in detail, the present invention forms a helical groove or a groove of a similar shape in the contact area between the rotor shaft and the support disk to apply thrust in one direction to the rotor shaft, and to prevent the thrust from being applied. By supporting the rotor shaft with a thrust bearing, it is possible to hold the rotor shaft in a specified position and prevent misalignment. Therefore, according to the present invention, the directionality of the rotor shaft with respect to the drive belt can be strictly controlled. Since the rotor shaft and support device do not need to be specified, it is easy to assemble the rotor shaft and support device.Moreover, since the rotor shaft is supported by the full width of the support disk circumference, the rotor can be mounted with the support disk tilted. Compared to conventional support devices that support the shaft, wear of the contact portion is reduced, durability is improved, and misalignment of the rotor shaft due to wear is prevented.

Further, since the thrust in the axial direction is provided by a mechanical element such as a helical groove, there is no variation in the thrust between the respective weights.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a partially cutaway plan view of the support device, FIG. 2 is a side view, FIG. 3 is a front view, and FIGS. 4 and 5 are views of the support device. FIG. 3 is a partially cutaway plan view showing another embodiment of the invention. 1... Rotor, 2... Rotor shaft, 2a
, 2b... Helical groove, 3-6... Support disk, 3a-6a... Helical groove, 13
...Thrust bearing.

Claims (1)

[Claims] 1. In an open-end spinning machine in which a rotor shaft is rotatably supported by a twin disc mechanism and the rotor shaft is rotationally driven by a drive belt running at right angles above the rotor shaft, the rotor shaft and the twin disc mechanism are connected to each other. A helical groove or a similar groove for applying thrust to the rotor shaft is formed on one of the rotor shaft side and the support disk side of the contact area with the constituent support disks, and a groove of a similar shape is formed in the vicinity of the rotor shaft. A support device for a rotor shaft in an open-end spinning frame, characterized in that a thrust bearing is provided for receiving thrust from the groove and holding the rotor shaft at a prescribed position.