US3922840A

US3922840A - Rotor spindle driving part in a spinning machine

Info

Publication number: US3922840A
Application number: US517435A
Authority: US
Inventors: Etsuji Watanabe; Tsutomu Miyazaki; Takashi Kato; Noriaki Miyamoto
Original assignee: Toyoda Automatic Loom Works Ltd
Current assignee: Toyota Industries Corp
Priority date: 1973-10-31
Filing date: 1974-10-23
Publication date: 1975-12-02
Anticipated expiration: 1992-12-02
Also published as: JPS5434038Y2; DE2451582A1; CH574511A5; JPS5070225U; GB1478699A

Abstract

Rotors in a spinning machine, where individual fibres are collected and then withdrawn as a twisted yarn, are driven through spindles connected at one ends to the corresponding ones and pulleys connected to the other ends of the spindles by a belt. During driving of the belt, the frictional heat is produced and accumulated in the pulleys. According to the invention, the pulleys are made of a material having a lower heat conductivity than that of the spindles to prevent the accumulated heat from being transferred to bearings which support the associated spindles for rotation.

Description

United States Patent 1 Watanabe et al.

ROTOR SPINDLE DRIVING PART IN A SPINNING MACHINE Inventors: Etsuji Watanabe; Tsutomu Miyazaki, both of Kariya; Takashi Kato, Toyota; Noriaki Miyamoto, Kariya, all of Japan Assignees: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya; Daiwa Boseki Kabushiki Kaisha, Osaka, both of Japan; part interest to each Y Filed: Oct. 23, 1974 Appl. No.: 5 17,435

Foreign Application Priority Data Oct. 31, 1973 Japan 48-126022[U] U.S. Cl. 57/5839 Int. Cl. D0lI-I 41/12 Field of Search 55/58.89-58.95, 9O

[ Dec. 2, 1975 [56] References Cited UNITED STATES PATENTS 3,375,649 4/l968 Burs et al 57/58.9l 3,51 I045 5/1970 Burs et al r r v 57/58.9l 3,756,007 9/1973 Bartling 57/5895 X 3.815.348 6/1974 Wachendorf ct alt 57/5889 Primary Examiner-Donald E. Watkins Attorney, Agent, or Firm-Wenderoth, Lind & Ponack [5 7] ABSTRACT Rotors in a spinning machine, where individual fibres are collected and then withdrawn as a twisted yarn are driven through'spindles connected at one ends to the corresponding ones and pulleys connected to the other ends of the spindles by a belt. During driving of the belt, the frictional heat is produced and accumulated in the pulleys. According to the invention, the pulleys are made of a material having a lower heat conductivity than that of the spindles to prevent the accumulated heat from being transferred to bearings which support-the associated spindles for rotation.

5 Claims, 3 Drawing Figures US. Patent Dec. 2, 1975 ROTOR SPINDLE DRIVING PART IN A SPINNING MACHINE BACKGROUND OF THE INVENTION This invention relates to improvements in rotor spindle driving parts in a spinning machine.

In each spinning unit of the open end spinning machine, a continuously delivered sliver is separated into individual fibres by means of a separator and the individual fibres aretransported to the inner wall of a rotor where they are collected and then withdrawn as a twisted yarn. The rotor is driven. through a spindle and a pulley by a belt which is in frictional engagement with the pulley, the spindle being connected at one end to the rotor and at the other end to the pulley .and carried for rotation by a bearing(s The opening of the rotor is arranged around the separator so as to provide an annular narrow clearance between the outer wall of the separator and the wall of the rotor opening. In addition, a stationary holder for the rotor has an opening which is arranged around the separator and very'close to the rotor opening, thus also providing a narrow clearance defined by the holder, separator and rotor. Thus, the clearances have the possibility of being clogged by the fibres. If this occurs, the rotor will become decreased in speed or completely stopped in spite of the belt being driven, resulting in the generation of heat at the interface between the pulley and the belt, The heat thus produced will be transferred through the spindle to the spindle bearing(s) which is subject to unfavorable effects. That is, the heat transferred to the bearing excessively increases the temperature of the lubricant, such as grease, contained within the bearing, with the resultant disadvantage that the specific quality of the lubricant becomes poor. Furthermore, where structural elements, e.g. a ball retainer and a seal plate, comprising the bearing are made of plastics, their property is made worse by means of the high temperature transferred thereto and in the worst case they become fused and/or deformed.

Particularly, the above-mentioned disadvantages often arise when applying the brake on the pulley of the high speed open end spinning machine to suddenly stop the rotor, since at this time the pulley become temporarily greatly increased in its temperature. It has been therefore desired to make improvements in the open end spinning machine to eliminate the aforesaid disadvantages.

SUMMARY OF THE INVENTION This invention relates to an open end spinning machine where each rotor is adapted to be driven through a spindle and a pulley connected to one end of the spindle remote from the rotor by a belt and has for its object the provision of an improved belt driven pulley which does not allow the heat produced therein to affect a spindle hearing or bearings.

According to the invention, the aforesaid disadvantages can be eliminated by providing a belt driven pulley or a part directly driven by the belt, which pulley or part is made of a material having a lower heat conductivity than that of the spindle, whereby the heat produced at the interface between the belt and the pulley or part is hard to be transferred to the spindle bearing.

BRIEF DESCRIPTION or HE DRAWING The invention will become more readily apparent from the following exemplary description in connection with the accompanying drawing in which:

FIG. 1 is a side elevational view, partially in section, illustrating .one spinning unit of an open end spinning machine incorporated with the invention;

FIG. 2 is a side elevation of the spinning unit of FIG. 1 in an inoperative position; and

FIG. 3 is a fragmental diagrammatic view illustrating a different modification of the invention.

DESCRIPTION oE THE EMBODIMENTS Referring now to the drawing, wherin like reference characters designate like or corresponding parts throughout the views, there is ,shown in FIGS. 1 and 2 a spinning unit of an open end spinning machine incor porated with the invention, which com'prises a series of spinning units although in the figures a single spinning unit is illustrated only for the purpose of simplification. Each of the spinning units includes feeding and coming means 23 (shown in FIG. 1 by the dotted line) for feeding a not shown sliver through an inlet channel 24 into a rotary spinning chamber defined by a rotor l. A finished yarn 26 is withdrawn through a discharge channel 25 provided in a separator 21. A hunger 3 fixedly secured to a mounting plate 2 carries, through a pin 4, a rotor holder 5 for pivotal motion. Connected to the rotor holder 5 by means of a screw 20 is a bearing 6 for rotatably carrying a spindle S which has the rotor 1 and a pulley 8 connected to the opposite ends thereof, the pulley8 being in conventional, frictional engagement with a belt 7'. Therefore, in highspeed travelling of the belt 7, the pulley 8 is rotated thereby and hence the rotor 1 also rotated at high speed to perform the spinning of fibres. The separator 21 partly enters the rotor 1 through an opening 22 thereof so as to provide an annular narrow clearance between the inner wall of the rotor l and the wallof the separator 21. In addition, the stationary holder5 for the rotor 1 has an opening which is arranged around the separator and very close to the rotor opening 22, thus also providing a narrow clearance defined by the holder 5, separator 21 androtor 1. Therefore, it is understood that these clearances have the possibility of being clogged by the fibres during the spinning operation.

The bearing 6 may contain a suitable lubricant, such as greace, and some or all components thereof may be made of suitable plastics.

For example, upon the occurrence of the sliver breakage, the rotation of the rotor has to be stopped in order to clean the interior or spinning chamber of the rotor. For the purpose of doing so, in the spinning machine of the type described, a pin 9 is pushed down to disengage a catcher 10 therefrom to thereby allow a spinning body 11 to incline on a pin 12 in a counterclockwise direction in FIG. 1. At the same time, a bridge plate 14 mounted for pivotal motion on the spinning body 11 by means of a pin 27 is moved until its hook extremity 28 is brought into engagement with a flange 13 of the rotor holder 5, whereupon the holder 5 is inclined on the pin 4 as shown in FIG. 2. At this time, the pulley 8 is also inclined to be disengaged from the belt 7 and forced against a brake shoe 15 mounted on a brake member 16, whereby the brake is applied on the rotor 1, resulting in the stoppage of the latter. Thus, it is understood that the frictional heat is produced at 3 the interface between the belt 7 and the pulley 8 and stored in the pulley 8.

In order to make it hard to transfer the stored heat to the spindle bearing 6, the pulley 8 is made of a material, such as stainless steel containing l8% chrome and 8% nickle and of 14 KcallmhC heat conductivity, having a lower heat conductivity than that of the spindle material which is normally carbon steel of 46 Kcal/mhC heat conductivity. Since it is comparatively difficult to machine the stainless steel material into a desired shape, only the pulley or a part directly driven by the belt 7 is preferably made of the stainless steel.

The results of the tests are listed in the Table 1, wherein in the case of the prior art the material of both the pulley and the spindle is carbon steel containing below 0.5% carbon and of 46 Kcal/mhC heat conductivity; and in the case of the present invention only the pulley is made of stainless steel containing 18% chrome and 8% nickle and of 14 KcallmhC heat conductivity.

Thus, it is noted from the Table that the heat produced by the friction between the belt and the pulley is hard tovbe transferred to the spindle and therefore to the bearing. The lubricant, such as grease, within the bearing is prevented from being worsened and the effective life of the components comprising the bearing can be prolonged, since the bearing is not excessively heated even when applying the brake on the pulley. In addition, the prevention of deterioration of the bearing lubricant is followed by an advantage of lengthening a cycle of replenishment of the lubricant.

In FIG. 3, the belt 7 is adapted to be in frictional engagement with a part 8 which is connected in end to end relationship with the spindle by friction welding and made of stainless steel.

It is to be noted that although FlG. 1 illustrates a particular type of spinning machine, that is a hinge open end spinning machine, the invention is not limited thereby.

Also, it is to be noted that the particular embodiments of the invention described herein are merely illustrative of the underlying principles involved, and numerous modifications may be conceived without departing from the spirit and scope of the invention. For example, the pulley may be made of stainless steel containing 20% chrome and 15% nickel, or 25% chrome and 20% nickel; or nickel-chromium steel containing 40% nickel and 15% chrome, or nickel and 15% chrome; or nickel steel containing 10%, 20%, 30%, 40%, or 50% nickel. The heat conductivity of these materials is within the range of 10 to 22 Kcal/mhC. The spindle may be made of bearing steel, such as a high carbon-chromium steel, having a heat conductivity of 32 to 37 Kcal/mhC carburizing steel, or heat resisting steel.

What we claim is:

1. In a spinning machine comprising at least one spinning unit each having a rotor, which defines a spinning chamber, a spindle connected at one end to said rotor, bearing means for supporting said spindle for rotation, a member connected to the other end of said spindle, said member being made of a material having a heat conductivity lower than that of said spindle, a belt travelling in frictional engagement with said member to thereby rotate the spinning chamber of said rotor to perform spinning operation.

2. A spinning unit according to claim 1, wherein said spindle is made of carbon steel while said member stainless steel.

3. A spinning unit according to claim 1, wherein said bearing means contains a lubricant therein.

4. A spinning unit according to claim 3, wherein some of components comprising said bearing means are made of plastics.

5. A spinning unit according to claim 1, comprising brake means mounted adjacent to said member to stop the rotation of said rotor, said member engageable with either said belt for rotating said rotor or said brake meajns for braking said rotor to the stop.

Claims

5. A spinning unit according to claim 1, comprising brake means mounted adjacent to said member to stop the rotation of said rotor, said member engageable with either said belt for rotating said rotor or said brake means for braking said rotor to the stop.