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CN-116323439-B - Sprocket wheel

CN116323439BCN 116323439 BCN116323439 BCN 116323439BCN-116323439-B

Abstract

A sprocket has a circumferentially spaced series of teeth bridging the periphery of two axially spaced outer rings. An optional locking ring between the outer rings provides additional support to the tooth or outer ring and helps lock the tooth in place. The sprocket may be a split sprocket to facilitate mounting to and dismounting from the shaft.

Inventors

  • C.G. Grave

Assignees

  • 莱特拉姆有限责任公司

Dates

Publication Date
20260505
Application Date
20211027
Priority Date
20201120

Claims (20)

  1. 1. A sprocket, comprising: a first outer ring having a radially outer periphery and a central hub, the central hub of the first outer ring defining an axial aperture; a second outer ring having a radially outer periphery and a central hub, the central hub of the second outer ring defining an axial aperture aligned with the axial aperture of the first outer ring; a spacer between the first outer ring and the second outer ring to set an axial separation distance between the first outer ring and the second outer ring; a tooth sheet attached to and spanning the outer periphery of the first outer ring and the outer periphery of the second outer ring at circumferentially spaced tooth locations around the outer periphery of the first outer ring and the outer periphery of the second outer ring.
  2. 2. The sprocket as set forth in claim 1, wherein said first and second outer rings have spokes extending radially from a central hub to an outer periphery to define windows between circumferentially successive spokes.
  3. 3. The sprocket as set forth in claim 1, wherein the apertures of said first outer ring and the apertures of said second outer ring are square.
  4. 4. The sprocket as set forth in claim 1, wherein said first and second outer rings have slots opening to said outer periphery at said tooth locations and said tooth plates have slots that mate with said first and second outer ring slots to position said tooth plates at said tooth locations.
  5. 5. The sprocket as set forth in claim 1, wherein said tooth plates define a plane inclined relative to a radial direction.
  6. 6. The sprocket as set forth in claim 1, wherein said first and second outer rings have axially outer surfaces and said tooth plates extend axially outwardly from said axially outer surfaces.
  7. 7. The sprocket as set forth in claim 1, wherein said tooth plates are welded to said first and second outer rings.
  8. 8. The sprocket as set forth in claim 1, wherein said tooth plate is a rectangular blade having a height, a width and a thickness, said thickness being less than said height and less than said width.
  9. 9. The sprocket as set forth in claim 1, comprising a locking ring having a radially outer periphery and a central hub defining an axial aperture, said locking ring being positioned between said first outer ring and said second outer ring.
  10. 10. The sprocket as set forth in claim 9, wherein said locking ring has tooth seats at circumferentially spaced locations on an outer periphery thereof, said tooth seats supporting said tooth plates between said first and second outer rings.
  11. 11. The sprocket as set forth in claim 10, wherein said tooth holder has a back arranged at an angle relative to a radial direction, said tooth plate being seated against said back at said tooth position at an oblique angle relative to said radial direction.
  12. 12. The sprocket as set forth in claim 9, wherein said locking ring has circumferentially extending projections and said tooth plate has a hole therethrough to receive said projections when said axial apertures of said locking ring are aligned with said axial apertures of said first and second outer rings to lock said tooth plate in place.
  13. 13. The sprocket as set forth in claim 9, wherein said spacer is disposed between said first outer ring and a first side of said locking ring and between said second outer ring and an opposite second side of said locking ring.
  14. 14. The sprocket as set forth in claim 1, wherein said sprocket includes a fastener extending from said first outer ring to said second outer ring and said spacer is hollow to receive said fastener, said fastener maintaining said first outer ring and said second outer ring separated by said axially-spaced distance.
  15. 15. The sprocket as set forth in claim 1, wherein said sprocket comprises one or more locking rings disposed between said first outer ring and said second outer ring.
  16. 16. The sprocket as set forth in claim 15, wherein some of said spacers axially space said one or more locking rings from said first and second outer rings.
  17. 17. The sprocket as set forth in claim 15, wherein said sprocket comprises a first locking ring overlapping said first outer ring and a second locking ring overlapping said second outer ring.
  18. 18. The sprocket as set forth in claim 15, wherein said first and second outer rings, said one or more locking rings and said tooth plate are made of steel.
  19. 19. The sprocket as set forth in claim 1, wherein said first outer ring and said second outer ring are each formed from a first outer half ring and a second outer half ring.
  20. 20. The sprocket as set forth in claim 19, wherein said first outer half ring and said second outer half ring are axially offset relative to each other.

Description

Sprocket wheel Technical Field The invention relates to a toothed sprocket (toothed sprocket) for a conveyor belt. Background Modular plastic conveyor belts and sprockets are often used to transport products in the food industry. When operating at high speeds, such as in excess of 500 feet per minute, the plastic belt and its plastic sprocket wear at the driving face of the sprocket and the driven face of the belt. As these faces wear, the belt-sprocket engagement deteriorates and the belt starts to jump teeth, resulting in uneven conveying speed. Eventually, the belt, sprocket, or both, will be replaced. Disclosure of Invention One version of a sprocket embodying features of the invention includes first and second outer rings each having a radially outer periphery and a central hub defining an axial aperture. The axial apertures are aligned. The spacer between the first outer ring and the second outer ring sets an axial separation distance between the first outer ring and the second outer ring. The teeth sheets are attached to and span the outer periphery of the first outer ring and the outer periphery of the second outer ring at circumferentially spaced tooth locations around the outer periphery of the first outer ring and the outer periphery of the second outer ring. Another version of a sprocket embodying features of the invention includes outer rings each having a radially outer periphery and a central hub defining an axial aperture. The spacers between the outer rings set the axial separation distance between the outer rings. The teeth sheets are attached to and span the outer periphery of the outer ring at teeth locations circumferentially spaced around the outer periphery of the outer ring. The locking ring abuts the outer ring to strengthen the outer ring and has a radially outer periphery. The locking ring has a plurality of circumferentially spaced and circumferentially extending protrusions on its radially outer periphery and the teeth have apertures that receive the protrusions to lock the teeth. Drawings FIG. 1 is an isometric view of one version of a sprocket embodying features of the invention. Fig. 2 is an enlarged view of a portion of the drive belt of the sprocket of fig. 1. FIG. 3 is an enlarged view of a portion of the sprocket of FIG. 1 showing attachment of the tooth plate to the outer ring. FIG. 4 is an enlarged view of a portion of the sprocket of FIG. 1 showing the teeth being locked by the locking ring. FIG. 5 is an isometric view of one version of a split sprocket embodying features of the invention, the split sprocket being shown mounted on a shaft. Fig. 6 is an isometric view of one half of the split sprocket of fig. 5. Fig. 7 is an isometric view of the main portion of another version of a split sprocket. FIG. 8 is an enlarged view of a portion of the split sprocket of FIG. 7. FIG. 9 is an isometric view of a wider version of the split sprocket half of the split sprocket of FIG. 7. Detailed Description One version of a sprocket embodying features of the invention is shown in fig. 1-4. The sprocket 10 is constructed from a series of teeth 12 circumferentially spaced about the periphery 14 of two outer rings 16, 17. The pitch of the sprocket is defined by the spacing between the teeth. Each outer ring 16, 17 has a central hub 18 defining an axial aperture 20 perpendicular to the rotational axis 22 of the sprocket 10. Spokes 24 extend radially outward from the hub 18 to the outer periphery 14 of the outer rings 16, 17. Windows 26 formed between successive spokes 24 facilitate cleaning of the sprocket 10. The spacer 28 separates the outer rings 16, 17 from each other by an axial separation distance D. Fasteners 30 such as bolts and nuts hold the sprockets together. Bolts extend through holes (not shown) in the outer rings 16, 17 and from one outer ring to the other through the hollow spacer 28. A nut is secured to the end of the bolt. The optional locking ring 32 helps support the tooth 12 between the two radially outer rings 16, 17. Similar to the outer rings 16, 17, the locking ring 32 has a central hub 36, apertures, and radial spokes 38 extending outwardly from the hub to an outer periphery 40. The outer diameter of the outer rings 16, 17 is larger than the outer diameter of the locking ring 32. When the locking ring 32 is used, the spacers 28 are arranged between the outer ring 16 and the opposite facing side 34 of the locking ring, and between the outer ring 17 and the opposite facing side 35 of the locking ring. As shown in fig. 1, the spacer 28 and fastener 30 fasten the outer rings 16, 17 and locking ring 32 at their spokes 24 such that the apertures 20 are axially aligned. The orifice 20 shown in the example is square. When the aperture 20 is aligned, its four sides are aligned to receive a drive shaft or idler shaft having a square cross-section. Other polygonal hole shapes may be used, as well as circular apertures with keyways for receiving keys on the shaft. As shown