CA1204698A - Conveyor pulley - Google Patents
Conveyor pulleyInfo
- Publication number
- CA1204698A CA1204698A CA000439352A CA439352A CA1204698A CA 1204698 A CA1204698 A CA 1204698A CA 000439352 A CA000439352 A CA 000439352A CA 439352 A CA439352 A CA 439352A CA 1204698 A CA1204698 A CA 1204698A
- Authority
- CA
- Canada
- Prior art keywords
- discs
- bushings
- bushing
- disc
- bores
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors
- B65G39/02—Adaptations of individual rollers and supports therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pulleys (AREA)
- Rollers For Roller Conveyors For Transfer (AREA)
Abstract
ABSTRACT
A conveyor pulley that is mounted on a shaft having a bushing keyed thereto. The bushing has a flange that is bolted to a pair of discs and a plate member. The bushing is tapered to provide a wedging fit with the discs and the plate. One of the discs is disposed between the remaining disc and the plate with its outer peripheral edge wedged to the pulley's rim. The respective discs and plate are welded together at a substantial distance from the shaft.
A conveyor pulley that is mounted on a shaft having a bushing keyed thereto. The bushing has a flange that is bolted to a pair of discs and a plate member. The bushing is tapered to provide a wedging fit with the discs and the plate. One of the discs is disposed between the remaining disc and the plate with its outer peripheral edge wedged to the pulley's rim. The respective discs and plate are welded together at a substantial distance from the shaft.
Description
~2(~
CONVE YOR PU LLEY
BACKGROUND OF THE INVENTION
This invention relates to conveyor pulleys and more particularly to a new and improved hubless pulley with end discs.
In the manufacture of conveyor pulleys considerable time and eff~rt is required to fabricate the hub which interconnects the bushing and the disc which in turn is connected to the cylindrical rim.
The machining time ordinarily required to interfit the tapered bushing with the taper,ed hub is considerable and correspondingly expensive. In connecting the web or disc to the hub and rim, distortion appears due to ~he the weldin~ necessary lS to interconnect thes~ parts. In orcler to improve the heat afEected welding zone, the conveyor pulley of the instant invention is fabricated without a hub.
In addition a plurality of discs are mechanically interconnected to the bushing of the pulley and thence welded to the rim and to each other to improving fatigue life. This permits the reducing of the ratio of the weld size to the principle disc thickness. The principle disc is connected to the cylindrical rim.
~5 SUMMARY OF THE INVENTION
The present invention contemplates a conveyor pulley that includes a pair of spaced bushings that can be attached to a shaft. Each bushing has a flanged portion with a tapered cylindrical portion on which are mounted at least a pair of disc and a plate member. The discs and plate member are bolted to the flanged portion and also attached to each other by peripheral welds. The principle disc which is annular is connected to the 35 cylindrical rim of the pulley by fillet welds. ~ r ~Z04t;~s BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a front elevational view of a conveyor pulley, partly in section to illustrate the bushings and disc structure.
Fig. 2 is an end elevational view of the conveyor pulley.
Fig. 3 is a cross-sectional view of a modified form of a conveyor pulley.
DETAIL~D DESCRIPTION
Referring to the drawings, wherein like reference numerals designate like or corresponding parts throughout the several views, there is shown in Fig. 1 a longitudinally disposed cylindrical rim 10.
The respective end portions oE the rim 10 are supported by support means which lncludes a pair of laterally spaced annular discs l:L to be described.
Within the rim 10 is a pair of laterally spaced bushings 12 (only one shown) wlth a central bore 13 extending longitudinally therethrough. Since both bushings are alike only one will be described.
The bushing 12 has an annular flange 14 with a plurality of circumferentially spaced holes 15 along the outer portion thereof. The bushing's outer surface 16 tapers from flange 14 inwardly and downwardly toward the longitudinal center line of bore 13.
The support means which includes the discs 11 interconnects the bushing 12 to the cylindrical rim 10. Disc 11 has a central bore 18 that tapers substantially at the same angle as the outer surface 16 of bushing 12 such as to abuttingly receive the bushing 12~ The outer peripheral side edge of disc 11 is welded to the inner surface of rim 10 as by fillet welds as at 19. An annular disc 20 located ' between the flange 14 and disc 11 abuttingly engages ~OqLg~
disc 11 and is welded thereto as at 21 along its outer circumferential edge. The central bore 22 of disc 20 tapers at the same angle as the outer surface 16 of bushing 12 to frictional engage the bushings' 12 outer surface 16. Also mounted on tapering surface 16 is a square shaped plate 25 having a central bore 26 and a plurality of circumferential spaced bores 27 aligned with circumferential s~aced bores 28, 29 and 15 in disc 11, disc 20 and flange 14 respectively. All of the bores 27, 28 and 29 are threaded to receive bolts 30. Square shaped plate 25 which may be polygonal has a plurality of circumferential spaced bores 32 permitting the welding of plate 25 to disc 11 which weld is a plug weld 33. The entire perimeter of plate 25 is also welded to the disc 11, indicated as 3~.
The bushings 12 receive a shaEt 35 and is secured for rotation therewith as by a key 36.
In the assembling of the conveyor pulley, the first operation is to weld the annular disc 20 and the square shaped plate 25 along their outer periphery to annular disc 11 as at 21 and 34 respectively. Plate 25 is then plug welded to the disc 11 along the various circumferential spaced 25 bores 32. The tapered bores 22, 18 and 26 are then machined or suitably finished to their tapered size on the joined discs 20, 11 and plate 25 respectively, assuring a proper fit with the tapered surface 32 on bushing 12. The plurality oE circumferentially 30 spaced holes 29, 28 and 27 in discs 20, 11 and plate 25 are then drilled and tapped thereby assuring their alignment with bore 15 in bushing 12. The welding of the annular discs 20 and 11 and plate 25 is done at a distance as great as possible from the longitudinal 35 center line of the tapered bores 22, 18 and 26 to eliminate heat distortion. Pairs of bushings 12 and the support means that include annular discs 11 and 20 and plate members 25 are then assembled as units onto shaft 35 and keyed thereto as at 36. The cylindrical rim 10 is then slid over the spaced pair of annular discs 11 and fillet welded thereto as at 19.
A variation on the construction of such described conveyor pulley is to eliminate the need for the annular flange 14 on busning 12 and its corresponding circumferentially spaced holes 15. In addition, the holes 29, 28 and 27 can be eliminated.
The rim 10 is supported by a pair of spaced bushings 40 (only one shown). The bushings outer surface 41 tapers downwardly, such that the taper of each bushing tapers toward each other. A disc 42 with a central tapered bore 43 is frictionally received by the tapered outer s~lrface 41. A smaller diameter clisc 4q, also with a centrally disposed taperecl bore 45, is frictionally received by the tapered outer surface 41 and has it one flat annular surface 46 abuttingly contacting disc 42. Disc 44 is welded to the disc 42 along the outer peripheral surface as at 47~ ~lso mounted on the tapered outer surface 41 of bushing 40 in abutting contact with the annular disc 42 is a square shaped plate 49. Plate 49 has its outermost edge welded as at 50 to disc 42. Square shaped plate 49 may be polygonal. Plate 49 has a plurality of circumerential shaped bores 51 permitting the plug welding of plate 49 to disc 42.
The annular disc 42 is welded to the rim 10 along its outer peripheral edge as a fillet weld. Bushing 40 receive shaft 53 and is secured for rotation therewith as by a key 54.
The bushing 40 is connected to the annular discs 42 and 44 and the plate 49 by a plurality of circumferentially spaced wedging screws 55, shown as cap screws, parallel with the axis of rotation of the shaft 53. These screws 55 are secured in holes - ~2~
therof provided by drilling and tapping holes 56 at the juncture of the bushings 40 and the plate ~9 along with discs 44 and ~2. Such holes 56 may be counterbored to receive the heads of screw 55. The counter-bore may be of less depth in bushing 40 than in the disc 44 to provide a shoulder for the screw 55 to bear against. The hole 56 after drilling is provided with threads as at 57 only in the discs and plate 49. The bushing portion of the hole 56 is without threads. (See U.S. Patent 2l856,211 and U.S.
Patent 2,763,1583. Thus the screws 55 on tightening pull the tapered bushing ~0 into!the matching taper of the discs and plate providing a wedging and locking action. The modified form of the emhodiment is assembled in substantially the same manner as described in the first embodiment wherein the welding is done Eirst, then the bores are drillecl Eollowed ~y the tapping of holes 56.
Various modifications are contemplated and may be resorted to by those skilled in the art without departing from the described invention, as hereinafter defined by the appended claims, as only preferred embodiments thereof has been disclosed.
CONVE YOR PU LLEY
BACKGROUND OF THE INVENTION
This invention relates to conveyor pulleys and more particularly to a new and improved hubless pulley with end discs.
In the manufacture of conveyor pulleys considerable time and eff~rt is required to fabricate the hub which interconnects the bushing and the disc which in turn is connected to the cylindrical rim.
The machining time ordinarily required to interfit the tapered bushing with the taper,ed hub is considerable and correspondingly expensive. In connecting the web or disc to the hub and rim, distortion appears due to ~he the weldin~ necessary lS to interconnect thes~ parts. In orcler to improve the heat afEected welding zone, the conveyor pulley of the instant invention is fabricated without a hub.
In addition a plurality of discs are mechanically interconnected to the bushing of the pulley and thence welded to the rim and to each other to improving fatigue life. This permits the reducing of the ratio of the weld size to the principle disc thickness. The principle disc is connected to the cylindrical rim.
~5 SUMMARY OF THE INVENTION
The present invention contemplates a conveyor pulley that includes a pair of spaced bushings that can be attached to a shaft. Each bushing has a flanged portion with a tapered cylindrical portion on which are mounted at least a pair of disc and a plate member. The discs and plate member are bolted to the flanged portion and also attached to each other by peripheral welds. The principle disc which is annular is connected to the 35 cylindrical rim of the pulley by fillet welds. ~ r ~Z04t;~s BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a front elevational view of a conveyor pulley, partly in section to illustrate the bushings and disc structure.
Fig. 2 is an end elevational view of the conveyor pulley.
Fig. 3 is a cross-sectional view of a modified form of a conveyor pulley.
DETAIL~D DESCRIPTION
Referring to the drawings, wherein like reference numerals designate like or corresponding parts throughout the several views, there is shown in Fig. 1 a longitudinally disposed cylindrical rim 10.
The respective end portions oE the rim 10 are supported by support means which lncludes a pair of laterally spaced annular discs l:L to be described.
Within the rim 10 is a pair of laterally spaced bushings 12 (only one shown) wlth a central bore 13 extending longitudinally therethrough. Since both bushings are alike only one will be described.
The bushing 12 has an annular flange 14 with a plurality of circumferentially spaced holes 15 along the outer portion thereof. The bushing's outer surface 16 tapers from flange 14 inwardly and downwardly toward the longitudinal center line of bore 13.
The support means which includes the discs 11 interconnects the bushing 12 to the cylindrical rim 10. Disc 11 has a central bore 18 that tapers substantially at the same angle as the outer surface 16 of bushing 12 such as to abuttingly receive the bushing 12~ The outer peripheral side edge of disc 11 is welded to the inner surface of rim 10 as by fillet welds as at 19. An annular disc 20 located ' between the flange 14 and disc 11 abuttingly engages ~OqLg~
disc 11 and is welded thereto as at 21 along its outer circumferential edge. The central bore 22 of disc 20 tapers at the same angle as the outer surface 16 of bushing 12 to frictional engage the bushings' 12 outer surface 16. Also mounted on tapering surface 16 is a square shaped plate 25 having a central bore 26 and a plurality of circumferential spaced bores 27 aligned with circumferential s~aced bores 28, 29 and 15 in disc 11, disc 20 and flange 14 respectively. All of the bores 27, 28 and 29 are threaded to receive bolts 30. Square shaped plate 25 which may be polygonal has a plurality of circumferential spaced bores 32 permitting the welding of plate 25 to disc 11 which weld is a plug weld 33. The entire perimeter of plate 25 is also welded to the disc 11, indicated as 3~.
The bushings 12 receive a shaEt 35 and is secured for rotation therewith as by a key 36.
In the assembling of the conveyor pulley, the first operation is to weld the annular disc 20 and the square shaped plate 25 along their outer periphery to annular disc 11 as at 21 and 34 respectively. Plate 25 is then plug welded to the disc 11 along the various circumferential spaced 25 bores 32. The tapered bores 22, 18 and 26 are then machined or suitably finished to their tapered size on the joined discs 20, 11 and plate 25 respectively, assuring a proper fit with the tapered surface 32 on bushing 12. The plurality oE circumferentially 30 spaced holes 29, 28 and 27 in discs 20, 11 and plate 25 are then drilled and tapped thereby assuring their alignment with bore 15 in bushing 12. The welding of the annular discs 20 and 11 and plate 25 is done at a distance as great as possible from the longitudinal 35 center line of the tapered bores 22, 18 and 26 to eliminate heat distortion. Pairs of bushings 12 and the support means that include annular discs 11 and 20 and plate members 25 are then assembled as units onto shaft 35 and keyed thereto as at 36. The cylindrical rim 10 is then slid over the spaced pair of annular discs 11 and fillet welded thereto as at 19.
A variation on the construction of such described conveyor pulley is to eliminate the need for the annular flange 14 on busning 12 and its corresponding circumferentially spaced holes 15. In addition, the holes 29, 28 and 27 can be eliminated.
The rim 10 is supported by a pair of spaced bushings 40 (only one shown). The bushings outer surface 41 tapers downwardly, such that the taper of each bushing tapers toward each other. A disc 42 with a central tapered bore 43 is frictionally received by the tapered outer s~lrface 41. A smaller diameter clisc 4q, also with a centrally disposed taperecl bore 45, is frictionally received by the tapered outer surface 41 and has it one flat annular surface 46 abuttingly contacting disc 42. Disc 44 is welded to the disc 42 along the outer peripheral surface as at 47~ ~lso mounted on the tapered outer surface 41 of bushing 40 in abutting contact with the annular disc 42 is a square shaped plate 49. Plate 49 has its outermost edge welded as at 50 to disc 42. Square shaped plate 49 may be polygonal. Plate 49 has a plurality of circumerential shaped bores 51 permitting the plug welding of plate 49 to disc 42.
The annular disc 42 is welded to the rim 10 along its outer peripheral edge as a fillet weld. Bushing 40 receive shaft 53 and is secured for rotation therewith as by a key 54.
The bushing 40 is connected to the annular discs 42 and 44 and the plate 49 by a plurality of circumferentially spaced wedging screws 55, shown as cap screws, parallel with the axis of rotation of the shaft 53. These screws 55 are secured in holes - ~2~
therof provided by drilling and tapping holes 56 at the juncture of the bushings 40 and the plate ~9 along with discs 44 and ~2. Such holes 56 may be counterbored to receive the heads of screw 55. The counter-bore may be of less depth in bushing 40 than in the disc 44 to provide a shoulder for the screw 55 to bear against. The hole 56 after drilling is provided with threads as at 57 only in the discs and plate 49. The bushing portion of the hole 56 is without threads. (See U.S. Patent 2l856,211 and U.S.
Patent 2,763,1583. Thus the screws 55 on tightening pull the tapered bushing ~0 into!the matching taper of the discs and plate providing a wedging and locking action. The modified form of the emhodiment is assembled in substantially the same manner as described in the first embodiment wherein the welding is done Eirst, then the bores are drillecl Eollowed ~y the tapping of holes 56.
Various modifications are contemplated and may be resorted to by those skilled in the art without departing from the described invention, as hereinafter defined by the appended claims, as only preferred embodiments thereof has been disclosed.
Claims (12)
1. A conveyor pulley comprising a cylindrical rim, a pair of spaced bushings within said rim, each of said bushings having a central bore, a shaft received by each of said central bores and keyed to said bushings for rotation therewith, said bushings having spaced outer surfaces that taper toward each other, a first annular disc with a central tapered bore received by each of said tapered outer surfaces of said bushings, a second annular disc with a central tapered bore received by each of said tapered outer surface of said bushings, each of said first annular discs being welded to adjacent ones of said second discs along the outer peripheral edge of each of said first discs, each of said second discs welded to said rim along the juncture of the outer peripheral edge of each of said second discs adjacent said rim, a plate member with a central tapered bore received by each of said tapered outer surfaces of said bushings and having its outer edge welded to adjacent ones of said second discs, and means interconnecting each of said bushings with said plates and said discs mounted thereon.
2. A conveyor pulley as set forth in claim 1 wherein each of said plate members is polygonal in shape.
3. A conveyor pulley as set forth in claim 2 wherein each of said plate members and adjacent ones of said second discs are interconnected by plug welds.
4. A conveyor pulley as set forth in claim 3 wherein said spaced bushings are interconnected to said plates and said discs mounted thereon by screws, said interconnection by said screws between said bushings, plates and discs include a plurality of circumferentially spaced holes, each of said spaced holes have portions in said bushings and the remaining portions of each said holes are in said discs and plates, and wherein only those portions of said holes in said discs and plates are threaded for said screws.
5. A conveyor pulley comprising a cylindrical rim, a pair of axially spaced bushings within said rim, each bushing having a flanged portion and a cylindrical portion, each of said bushings having a central bore, a shaft received by each of said central bores and keyed to said bushings, each of said bushings having a outer surface that tapers toward each other, each of said flanged portions having a plurality of circum-ferentially spaced bores, a first annular disc with a central tapered bore received by each of said tapered outer surfaces of said bushings, a second annular disc with a central tapered bore received by each of said tapered outer surface of said bushings, each of said first annular discs being welded to adjacent ones of said second discs along the outer peripheral edge of each of said first discs, each of said second disc welded to said rim along the juncture of the outer peripheral edge of each of said second disc adjacent said rim, a plate member with a central tapered bore received by each of said tapered outer surfaces of said bushings and having its outer edge welded to adjacent ones of said second discs, each of said plates and adjacent ones of said discs all having a plurality of circumferentially spaced bores in alignment with said bores of adjacent ones of said flanges, and bolt means interconnecting each of said bushings with said plate and said discs mounted adjacent therewith through said aligned bores.
6. A conveyor pulley as set forth in claim 5 wherein each of said plate members is polygonal in shape.
7. A conveyor pulley as set forth in claim 6 wherein all of said welds are radially outwardly of said circumferentially spaced bores.
8. A conveyor pulley as set forth in claim 7 wherein each of said plate members and adjacent ones of said second discs are interconnected by plug welds.
9. A conveyor pulley as set forth in claim 8 wherein said first disc on each of said bushings is located axially between said adjacent second discs and said flange portion of said adjacent bushing, and said second disc of each bushing is located axially between adjacent ones of said first disc and said plate member.
10. A conveyor pulley comprising a cylindrical rim, a bushing within said rim, said bushing having a flanged portion and a cylindrical tapered portion, said bushing having a central bore for receiving a shaft, said flanged portion having a plurality of circumferentially spaced bores, an annular disc with a tapered bore mounted on said tapered portion of said bushing, said discs having a plurality of circumferentially spaced bores in alignment with said circumferentially spaced bores of said flange portion of said bushing, bolt means interconnecting all of said aligned circumferentially spaced bores to connect said disc to said flanged portion of said bushing, said annular disc being welded to said rim along the outer side periphery of said disc, and said weld lies at a greater radial distance from the axial center line of said bushing than the radial distance from said bores of said flange to said axial center line of said bushing.
11. A conveyor pulley as set forth in claim 10 wherein a plate member with a tapered bore is mounted on said cylindrical tapered portion of said bushing, and said plate member is welded along its outer perimeter to said annular disc.
12. A conveyor pulley as set forth in claim 11 wherein said plate member has a plurality of circumferentially spaced bores in alignment with said bores on said flange, said plate member is interconnected to said flange by said bolt means, and said plate member is polygonal in shape.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US43737982A | 1982-10-28 | 1982-10-28 | |
| US437,379 | 1982-10-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1204698A true CA1204698A (en) | 1986-05-20 |
Family
ID=23736179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000439352A Expired CA1204698A (en) | 1982-10-28 | 1983-10-20 | Conveyor pulley |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1204698A (en) |
| DE (1) | DE3338275A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2763158A (en) * | 1954-04-02 | 1956-09-18 | Dodge Mfg Corp | Conveyor pulleys |
| FR1367349A (en) * | 1963-08-27 | 1964-07-17 | Dodge Mfg Corp | Construction of rollers and their hubs |
| FR2537964B1 (en) * | 1982-12-15 | 1986-07-18 | Verlinde Sa | GROUP FORM OF A WINCH DRUM AND ITS DRIVE REDUCER, MEANS OF MOUNTING IN THE FRAMEWORK OF AN ASSEMBLY, AND ASSEMBLY THUS OBTAINED |
-
1983
- 1983-10-20 CA CA000439352A patent/CA1204698A/en not_active Expired
- 1983-10-21 DE DE19833338275 patent/DE3338275A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE3338275A1 (en) | 1984-05-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |