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CN-224227316-U - Mandrel bearing assembly for drawing roller

CN224227316UCN 224227316 UCN224227316 UCN 224227316UCN-224227316-U

Abstract

The utility model discloses a mandrel bearing assembly for drawing leather rollers, which comprises a mandrel and bearings coaxially arranged at two ends of the mandrel, and is characterized in that two ends of the mandrel are respectively integrally contracted and extended to form a cylindrical bearing support part, two ends of the mandrel are respectively provided with a bearing outer ring, the bearing outer rings are sleeved on the bearing support part, balls and/or rolling pins are sleeved between the bearing outer rings, a bearing structure is formed by the bearing support part, the balls and/or rolling pins and the bearing outer rings, the outer diameter of the bearing outer rings is not larger than the outer diameter of the mandrel, and the outer ends of the bearing outer rings are provided with detachable end covers. The utility model does not need to detach the bearing when polishing or replacing the leather roller, thereby being convenient for operation and prolonging the service life of the bearing.

Inventors

  • HAN TINGZHI
  • CHEN WEI
  • CHEN ZHONGHE

Assignees

  • 盐城金陀螺纺织轴承有限公司

Dates

Publication Date
20260512
Application Date
20250611

Claims (10)

  1. 1. The mandrel bearing assembly for the drawing roller comprises a mandrel and bearings coaxially arranged at two ends of the mandrel, and is characterized in that two ends of the mandrel are respectively integrally contracted and extended to form cylindrical bearing supporting parts, two ends of the mandrel are respectively provided with a bearing outer ring, the bearing outer rings are sleeved on the bearing supporting parts, balls and/or rolling pins are sleeved between the bearing outer rings, a bearing structure is formed by the bearing supporting parts, the balls and/or rolling pins and the bearing outer rings, the outer diameter of the bearing outer rings is not larger than the outer diameter of the mandrel, and the outer ends of the bearing outer rings are provided with detachable end covers.
  2. 2. The mandrel bearing assembly for drawing leather rollers according to claim 1, wherein when balls are arranged, inner grooves are formed in inner holes of the outer ring of the bearing, outer grooves are correspondingly formed in the bearing supporting portions, the balls are located between the corresponding inner grooves and the outer grooves and are isolated through retainers, when rolling pins are arranged, the rolling pins are limited by limiting plates, and two rows of balls, or one row of balls and one row of rolling pins, or one row of balls and two rows of rolling pins are respectively arranged.
  3. 3. The mandrel bearing assembly for a drawing roller according to claim 1 wherein the outer periphery of the removable end cap is in close fit with the inner periphery of the bearing outer race, the end cap has an axial boss that mates with the mounting frame, and a screw hole is provided in the center of the axial boss.
  4. 4. The mandrel bearing assembly for a drawing roller of claim 3 wherein said threaded bore is a through bore.
  5. 5. The mandrel bearing assembly for drawing rollers of claim 1 wherein the inner wall of the bearing outer ring is provided with a limiting step, the inner end of the detachable end cover is clamped on the limiting step, and the outer end of the detachable end cover is limited by an end cover limiter.
  6. 6. The mandrel bearing assembly for a drawing roller of claim 5 wherein the end cap has an axial boss in the center that mates with the mounting frame.
  7. 7. The mandrel bearing assembly for a drawing roller according to claim 1, wherein a dust ring is cooperatively disposed between the mandrel and the inner end of the bearing outer race.
  8. 8. The mandrel bearing assembly for a drawing roller of claim 1 wherein the bearing outer race is sleeved with a removable housing.
  9. 9. The mandrel bearing assembly for a drawing roller according to claim 8, wherein the outer periphery of the bearing outer race is provided with a removable housing retainer for positioning the removable housing.
  10. 10. The mandrel bearing assembly for a drawing roller of claim 8 wherein at least 2 removable housings are provided, said removable housings having different outer diameters or different wall thicknesses.

Description

Mandrel bearing assembly for drawing roller Technical Field The utility model relates to an accessory for textile machinery, in particular to a mandrel and bearing assembly for a drawing leather roller. Background In textile machines, the drawing roller is a traction member. The drawing leather roller mainly comprises a central mandrel and leather rollers sleeved on the central mandrel and tightly matched with the central mandrel, wherein shaft sleeves are generally arranged at two ends of the central mandrel, the central mandrel and the shaft sleeves form a combined piece together, and the outer ends of the shaft sleeves at the two ends are arranged on a frame, so that the free rotation of the leather roller central mandrel is realized. In the use process of the drawing leather roller, the surface can be worn, burrs, uneven and the like due to friction with yarns and the like, so that the quality of the yarns and the holding and drafting performances of the leather roller are affected, and the leather roller needs to be polished. Typically, one sanding is required for about 20 days. These defects can be removed by polishing, the smoothness and roundness of the surface of the leather roller are recovered, and the service life of the leather roller is prolonged. When polishing, the leather roller is generally installed on a leather roller driving shaft of the sharpening machine, and is fixed with the leather roller jacking seat through the leather roller clamping end, so that the leather roller can synchronously rotate along with the driving shaft. In order to adapt to the leather roller jacking seat, the shaft sleeve at the end part of the mandrel is usually required to be detached, and the leather roller jacking seat is reinstalled after polishing is finished. When the leather roller is worn to a certain extent, if the diameter is smaller than the specified size, or serious damage, deformation, aging and other problems occur on the surface of the leather roller, the leather roller cannot be repaired by polishing, and the leather roller needs to be replaced in time so as to ensure the normal operation of the drawing frame and the yarn quality. Because the size of the matching part of the shaft sleeve and the frame is usually larger than the outer diameter of the mandrel, when the leather roller needs to be replaced, the shaft sleeve needs to be removed, and the shaft sleeve is installed after the leather roller is replaced. Sleeve bearings or shaft sleeves are generally arranged at two ends of a mandrel of the drawing skin wontons. For example, chinese application CN106015319a discloses a drawing roller sleeve bearing, which comprises a bearing housing and a bearing mandrel, wherein an inner hole of the bearing housing is provided with two R-shaped inner channels, one end of the bearing mandrel is provided with a cone outer circle, the taper and the size of the cone outer circle are matched with those of an inner cone hole of the roller mandrel, a non-taper outer circle of the bearing mandrel is provided with two R-shaped outer channels, the positions of the outer channels are matched with those of the R-shaped inner channels of the bearing housing, steel balls are sleeved on the R-shaped inner channels of the bearing housing and the corresponding R-shaped outer channels of the bearing mandrel, the steel balls are uniformly separated by a retainer, the inner holes at two ends of the bearing housing are respectively pressed into a sealing ring and a positioning ferrule, and the sealing ring and the cone outer circle of the bearing mandrel are at the same end. According to the scheme, the outer circle of the cone on the bearing is matched with the inner cone hole of the leather roller mandrel to realize connection, the problem of non-concentricity in installation is easy to generate during disassembly and assembly, and abrasion is easy to occur. The utility model discloses a shaft sleeve structure of an improved drawing roller mandrel, which comprises a mandrel and a shaft sleeve coaxially sleeved on the mandrel, wherein the mandrel is inserted into one section of the shaft sleeve to form a conical column, a bearing sleeve is arranged in the shaft sleeve, the inner cylinder wall of the bearing sleeve is an inner conical surface matched with the conical column, a sleeve hoop matched with the bearing sleeve is arranged on the conical column, two groups of balls are axially distributed between the outer cylinder wall of the bearing sleeve and the inner cylinder wall of the shaft sleeve, the bearing sleeve, the shaft sleeve and the two groups of balls form a double-row ball bearing structure, one end of the bearing sleeve, which corresponds to the end surface of the conical column, is provided with a fixed disc, the outer diameter of the fixed disc is smaller than the outer diameter of the bearing sleeve and larger than the inner hole diameter of the end corresponding to the bearing sleeve, a screw is axially pen