US3671089A - Top roller for spinning machine - Google Patents

Top roller for spinning machine Download PDF

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Publication number
US3671089A
US3671089A US104017A US3671089DA US3671089A US 3671089 A US3671089 A US 3671089A US 104017 A US104017 A US 104017A US 3671089D A US3671089D A US 3671089DA US 3671089 A US3671089 A US 3671089A
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US
United States
Prior art keywords
bearing
roller
disc
top roller
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US104017A
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English (en)
Inventor
Nobukazu Morisaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daido Metal Co Ltd
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Daido Metal Co Ltd
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Filing date
Publication date
Application filed by Daido Metal Co Ltd filed Critical Daido Metal Co Ltd
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Publication of US3671089A publication Critical patent/US3671089A/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/74—Rollers or roller bearings

Definitions

  • This invention relates to a top roller for use in a spinning machine, in which self-lubricating, oilless bearings are used for both a radial and a thrust rotational sliding member and which, therefore, is operative with no lubricating oil supplied thereto.
  • the rolling members call for a lubricant, such as grease, when the top roller is used for an extended period or undergoes a fine vibration, and particularly when the load imposed thereon or the peripheral speed thereof is large.
  • a lubricant such as grease
  • the conventional top roller tends to be stained by the lubricant flowing thereonto and the liy waste attached thereto must be removed periodically. (The smooth rotation of the top roller tends to be impaired as a result of fly waste in air being caught on the top roller by a slight amount of lubricant leaking through an end of the bearing onto said top roller.)
  • FIG. 1 is a vertical cross-sectional view showing the construction of the top roller for a spinning machine, according to the present invention.
  • FIGS. 2a and 2b are diagrams showing the wear charac teristic of a bearing embodying the present invention.
  • the top roller for use in a spinning machine comprises a hollow cylindrical roller 2, a self-lubricating oilless hollow bearing tube 3 telescoped into the axial bore 2' of said hollow cylindrical roller 2, a shaft 1 journaled in the axial bore 6 of said bearing tube 3 and having an internally threaded hole 9 in the forward end thereof, a thrust bearing disc 4 consisting of a metallic disc 4 tightened to the forward end of said shaft 1 by means of a flush bolt 5 so as to engage the forward end face 7 of said hollow bearing tube 3 and a self-lubricating oilless bearing disc 4" lined externally of said first disc 4, and a metallic end cup 8 fitted with pressure into the forward end 2" of the axial bore of said roller 2.
  • Reference numeral 6' designates the sliding surface of the bearing tube 3 which takes a radial load.
  • the bearing disc 4" may be replaced by a self-lubricating bearing disc with a back metal (not shown), and the end cup 8 by an end plate (not shown).
  • a non-self-lubricating metallic disc (not shown) may be tightly fitted to the shaft 1 by means of the flush bolt 5 and thereafter an end cup bearing lined with a self-lubricating oilless bearing or selflubricating bearing end plate with a back metal (not shown) may be fixed in the forward end 2" of the axial bore of said roller 2 in force-fit engagement therewith.
  • a self-lubricating oilless bearing disc with a back metal thereon or a solid self-lubricating oilless bearing disc may be tightly fitted to the rearward face of the aforesaid end cup or end plate, facing the shaft, by means of a flush bolt and a non-self-lubricating metallic solid disc to the shaft by means of a flush bolt.
  • the roller is driven to rotate together with the tightly fixed end cup (or plate) and bearing tube, while the shaft itself is maintained substantially stationary or only relatively rotatable with respect to the tube and end cup.
  • a bearing disc fixed on the stationary shaft contacts the rotating metal disc always only at the localized portion of the bearing and so a localized wearing will occur in the bearing disc thus relatively shortening the service life thereof.
  • Reference numerals 7 and 7' designate, respectively, the sliding surfaces of the bearing tube 3 and the thrust bearing disc 4, which take a thrust load.
  • the sliding surface 7 takes a thrust load acting in the leftward direction and the sliding surface 7' takes a thrust load acting in the rightward direction, as viewed in the drawing.
  • FIG. 1 only one hollow bearing tube is shown as telescoped into the roller, for the purpose of showing the internal structure of the top roller, but it will be obvious that a bearing assembly comprising a plurality of bearing tubes may be provided within the roller depending upon the size of the roller and the size of the load imposed thereon.
  • a hollow cylindrical self-lubricating oilless solid bearing tube 3 which had an outer diameter of 15 mm., an inner diameter of 9.1 mm. and an axial length of 15 mm. and had been produced by compression-molding a mixture consisting of 60% by weight of powdered polytetra-fluoroethylene, 20% by weight of powdered bronze and 20% by weight of powdered graphite, and sintering the resultant molding at a temperature of 360-370 C.; a two-layer bearing disc 4 which consisted of a disc 4 made from Japanese Industrial Standards S 3308 carbon steel band steel (strip (SPMB)) and having a thickness of 2.5 mm.
  • SPMB Japanese Industrial Standards S 3308 carbon steel band steel
  • a bearing layer 4" of a porous sintered bronze layer impregnated with a mixture of polytetra-fiuoroethylene and lead and disposed on the exterior face of said disc 4 (such as the disc disclosed in Japanese patent publication No. 16,950/ .64); a metallic end cup 8 made from Japanese Industrial Standards G 3101 material (rolled structural steel (S841) .for use in common structures); a shaft 1 made of Japanese Industrial Standards G 4051 carbon steel S 400 for mechanical structure parts; and a brass screw with a cross recessed flush head (phillips screw were assembled in the manner shown in FIG. 1 and the resultant top roller was incorporated in a practically use spinning machine to test the wear characteristic of the bearing under the following conditions:
  • the peripheral speed V (m./min.) of the roller is represented by the formula
  • FIG. 2(a) represent the self-lubricating oilless solid bearing tube 3 force-fitted in the left hand side roller (the one of which the internal structure is shown) of the arrangement illustrated in FIG. 1 and the one force-fitted in the right hand side roller (of which the internal struc ture is not shown) of the same respectively.
  • These wear characteristic curves were obtained under the condition in which no fly waste was present in or at the end of the bearing.
  • the wear characteristic curves C (Sample No. 1)
  • FIG. 2(b) represent the self-lubricating oilless solid bearing tube 3 force-fitted in the left hand side roller (the one of which the internal structure is shown) of the arrangement of FIG. 1 and the one force-fitted in the right hand side roller (of which the internal structure is not shown) of the same respectively.
  • These wear characteristic curves were obtained under the condition in which fly waste was intentionally attached within or to the end of the bearing.
  • the top roller according to the present invention does not follow the process of initial running-in to constant wear, but the wear and time proceed in the relation of linear expression.
  • the top roller of the invention is expected to be useful for at least 5 years when calculated reversely from the tolerable value of clearance.
  • the amount of wear of the sliding surface 7', of the thrust bearing disc 4 was not measured because it is negligibly small in practice.
  • the top roller of the invention Since the top roller of the invention is constructed as described above and completely self-lubricating, there is no necessity of lubrication. Therefore, it operates stably at a low speed, with a low load and with a minimum wear, with no fear of dust being attached thereto as a result of it being stained with oil. In addition, it has a long service life, can be maintained, produced and assembled easily, and is free of an electrostatic trouble caused by friction. The present invention will bring about remarkable advantages when applied to a bearing which takes both a radial and thrust loads.
  • a top roller incorporating self-lubricating oilless bearings to take a radial force and thrust, comprising:
  • a hollow cylindrical roller a hollow cylindrical oilless bearing tube press-fitted in the axial bore of said roller; a shaft relatively rotatably received in said tube; a metal backed composite oilless bearing disc member fitted to the end face of said shaft and having a sintered oilless bearing layer positioned spaced from said bearing tube and having an unsintered face of the backing metal in contact with the end face of said bearing tube, said end face being perpendicular to the axis of said roller; and an end cup or end plate press-fitted into the end portion of the axial bore of said roller whereby said tube and end cup or end plate take both radial force and thrust on said shaft through said bearing disc.
  • a top roller incorporating self-lubricating oilless bearings to take a radial force and thrust comprising:
  • a hollow cylindrical roller a hollow cylindrical oilless bearing tube press-fitted in the axial bore of said roller; a shaft relatively rotatably received in said tube; a metal disc fitted to the end face of said shaft perpendicular to the axis of said roller; an end cup or end plate press-fitted into the end portion of the axial bore of said roller and a composite oilless bearing disc member with a back metal fitted to the end face of said end cup or end plate so that the oilless bearing layer of said composite bearing disc member sintered on the backing metal may be positioned to facing with the free side end of said metal disc fitted to said shaft.
  • 2,775,793 1/1957 Cotchett 308-238 3,583,778 6/1971 Mori 308-240 References Cited UNITED STATES PATENTS 5 MARTIN P. SCHWADRON, Primary Examiner 2 4 3 345 9 1949 Lee 30 20 B.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Sliding-Contact Bearings (AREA)
US104017A 1970-05-11 1971-01-05 Top roller for spinning machine Expired - Lifetime US3671089A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3998470 1970-05-11

Publications (1)

Publication Number Publication Date
US3671089A true US3671089A (en) 1972-06-20

Family

ID=12568194

Family Applications (1)

Application Number Title Priority Date Filing Date
US104017A Expired - Lifetime US3671089A (en) 1970-05-11 1971-01-05 Top roller for spinning machine

Country Status (5)

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US (1) US3671089A (fr)
BE (1) BE759662A (fr)
CH (1) CH513995A (fr)
DE (1) DE2058507A1 (fr)
GB (1) GB1332497A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760404B1 (fr) 1995-08-31 1998-11-25 Armstrong Textile Products GmbH Rouleau de filature pour systèmes d'étirage de production de fil

Also Published As

Publication number Publication date
GB1332497A (en) 1973-10-03
BE759662A (fr) 1971-04-30
DE2058507A1 (de) 1971-11-25
CH513995A (de) 1971-10-15

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