CA1069161A - Bearing for heavy steel drums, in particular decorating drums - Google Patents
Bearing for heavy steel drums, in particular decorating drumsInfo
- Publication number
- CA1069161A CA1069161A CA275,177A CA275177A CA1069161A CA 1069161 A CA1069161 A CA 1069161A CA 275177 A CA275177 A CA 275177A CA 1069161 A CA1069161 A CA 1069161A
- Authority
- CA
- Canada
- Prior art keywords
- roller
- hub
- bearing
- spring
- spring support
- 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
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- Gear Transmission (AREA)
Abstract
A BEARING FOR HEAVY STEEL DRUMS, IN
PARTICULAR DECORTICATING DRUMS
Abstract of the Disclosure This invention relates to an improvement in a shock-proof bearing for a heavy drum which is rotatably supported on a roller and is adapted to be driven by a gear drive, the axial spacing between the drum and the roller or the gear drive remaining constant for every spring-support position, the improvement comprising that the roller and a driving pinion are integral, and spring support means mounted between a casing of the roller and a hub thereof.
PARTICULAR DECORTICATING DRUMS
Abstract of the Disclosure This invention relates to an improvement in a shock-proof bearing for a heavy drum which is rotatably supported on a roller and is adapted to be driven by a gear drive, the axial spacing between the drum and the roller or the gear drive remaining constant for every spring-support position, the improvement comprising that the roller and a driving pinion are integral, and spring support means mounted between a casing of the roller and a hub thereof.
Description
- 10691~ AN 2072 The invention rel;ates to a shock-proof bearing for heavy steel drums, in particular decorticating drums rotatably supported on rollers ` and rotating by means of gear drives at low rpms, the axial distance between the steel drum and the roller gear drive remaining constant for every spring-held position.
It is known to place a heavy steel drum on bearing blocks which in turn are equipped with a pair of rollers directed upwardly and of such axial spacing that the drum lies in between in a slightly mov-able manner. When dealing for instance with decorticating equipment, this system permits to impart easily a relative rotation to the steel drum, so as to obtain decortication. A mechanical drive is used, 1 -consisting as a rule of a gear drive, howevcr systems making use of frictional rollers or chain drives are equally well known. The rollers most often are cast or made of welded steel plates and rotatably mounted on the roller block by means of ball bearings. The roller block rests on the foundation. The load from the drum thus passes through the rollers to the bearing block to the foundation.
This kind of equipment has the disadvantage that the goods being processed fall against the lower side of the interior wall in operation, and shocks are transmitted to the rollers. Consequently the surfaces of the rollers are damaged within a short time and the service life of the rollers is severely restricted, As a result, the rollers have been designed in the manner of automobile wheels in order to afford better compensation against the imbalance forces. Such rollers however have the drawback that their wear is very high, so that a tire change is required within a short time. It is true that the hard impacts on the rollers are absorbed by ,, , 1 ~k .
, ,. ~ ~, ' , 10691~1 AN 2u72 the rubber tires, but the service life thereof is much shortened. A
further suggested step is a conventional spring~support of the rollers, again for the purpose of absorbing the heavy shocks on the drum.
As initially noted, the steel drums must be started in rotation by means of a mechanical drive, and the best system of that type is a gear drive. This drive however requires a constant axial spacing be-tween the drum and the pinion in order to keep the teeth steadily meshed. Therefore the so-called spring support for the rollers cannot be used, or is used only if a chain drive is employed. However a chain drive also is subject to great wear; this kind of drive also must be omitted.
U. S. Patent No. 1,700,390, discloses a drum equipped with a roller bearing with rigid rollers, the bearing resting on races, and a separate gear drive mounted on a special bearing block. Thls design has the drawback that a change in the axial spacing or in another posi-tion of the drum is impossible and hence shock attenuation cannot be effected. If such nevertheless were provided, high wear of the bevel gear or of the spur gear would be expected.
The present invention addresses the problem of providing a shock-proof bearing for a heavy steel drum rotatably resting on roll-ers, the axlal spacing between the steel drum and the rollers or gear drlve remaining constant for every sprlng support position.
The object of the invention is achieved by the rollers and the drlve pinion being made integral and by mounting a wheel-hub spring, which may be a rubber insert, between the rollers and the hub. This construction allows the steel drum to rotate with great irnbalance and to simply absorb the impacts when there is an impulse-like change of position of the goods, without the bevel gears changing their con-stancy upon this change in position.
It is known to place a heavy steel drum on bearing blocks which in turn are equipped with a pair of rollers directed upwardly and of such axial spacing that the drum lies in between in a slightly mov-able manner. When dealing for instance with decorticating equipment, this system permits to impart easily a relative rotation to the steel drum, so as to obtain decortication. A mechanical drive is used, 1 -consisting as a rule of a gear drive, howevcr systems making use of frictional rollers or chain drives are equally well known. The rollers most often are cast or made of welded steel plates and rotatably mounted on the roller block by means of ball bearings. The roller block rests on the foundation. The load from the drum thus passes through the rollers to the bearing block to the foundation.
This kind of equipment has the disadvantage that the goods being processed fall against the lower side of the interior wall in operation, and shocks are transmitted to the rollers. Consequently the surfaces of the rollers are damaged within a short time and the service life of the rollers is severely restricted, As a result, the rollers have been designed in the manner of automobile wheels in order to afford better compensation against the imbalance forces. Such rollers however have the drawback that their wear is very high, so that a tire change is required within a short time. It is true that the hard impacts on the rollers are absorbed by ,, , 1 ~k .
, ,. ~ ~, ' , 10691~1 AN 2u72 the rubber tires, but the service life thereof is much shortened. A
further suggested step is a conventional spring~support of the rollers, again for the purpose of absorbing the heavy shocks on the drum.
As initially noted, the steel drums must be started in rotation by means of a mechanical drive, and the best system of that type is a gear drive. This drive however requires a constant axial spacing be-tween the drum and the pinion in order to keep the teeth steadily meshed. Therefore the so-called spring support for the rollers cannot be used, or is used only if a chain drive is employed. However a chain drive also is subject to great wear; this kind of drive also must be omitted.
U. S. Patent No. 1,700,390, discloses a drum equipped with a roller bearing with rigid rollers, the bearing resting on races, and a separate gear drive mounted on a special bearing block. Thls design has the drawback that a change in the axial spacing or in another posi-tion of the drum is impossible and hence shock attenuation cannot be effected. If such nevertheless were provided, high wear of the bevel gear or of the spur gear would be expected.
The present invention addresses the problem of providing a shock-proof bearing for a heavy steel drum rotatably resting on roll-ers, the axlal spacing between the steel drum and the rollers or gear drlve remaining constant for every sprlng support position.
The object of the invention is achieved by the rollers and the drlve pinion being made integral and by mounting a wheel-hub spring, which may be a rubber insert, between the rollers and the hub. This construction allows the steel drum to rotate with great irnbalance and to simply absorb the impacts when there is an impulse-like change of position of the goods, without the bevel gears changing their con-stancy upon this change in position.
-2-- . . . . , -The invention will be further illustrated by reference to the accompanying drawings, in which:
Figure 1 is a longitudinal section through a pair of rollers, Figure 2 is a design of the wheel-hub spring support in the form of a rubber insert, Figure 3 is a roller with spring inserts, Figures 4 and 5 show a roller with a casing of rubber, and Figure 6 is a roller for high moment of inertia transmission.
Figure 1 shows a longitudinal section of the shock-proof bear-ing system of the steel drum or rollers with bevel gears. A bearing block 2 is mounted on both sides of the foundation 1 and supports a bearing shaft 3 by means of ball bearings 4. A roller 10 is mounted on -the bearing shaft 3, the details of the roller being described below.
A drive motor 5 also is mounted on the foundation 1; it drives the bear-lng shaft 3 by means of a coupling 6. A steel drum 7 is equipped with the races 8 at the area of contact with the rollers 10. The race 8 is in the form of a double ring and at the center houses the gear 9. The drlve pinion 11 meshes with the gear 9, the type of teeth being imma-terial. The embodiment shows a mangle gear, whlch is best suited for this purpose.
The roller 10 is composed of a hub 13 mounted on the bearing shaft 3 by means of an adjusting spring. The roller casing 12 is mount-ed above the hub 13 in order to form a cavity containing a rubber in-sert 14 constituting the spring support for the wheel hub. The roller casing 12 has a smooth exterior surface and extends across two pairs of hubs mounted a certain distance apart. The drive pinion 11 is pro-vided ln a clearance at the center of this distance. The sector of a circle 16 Gf the drlve pinion 11 and the diameter of the roller casing 12 precisely coincide.
Figure 1 is a longitudinal section through a pair of rollers, Figure 2 is a design of the wheel-hub spring support in the form of a rubber insert, Figure 3 is a roller with spring inserts, Figures 4 and 5 show a roller with a casing of rubber, and Figure 6 is a roller for high moment of inertia transmission.
Figure 1 shows a longitudinal section of the shock-proof bear-ing system of the steel drum or rollers with bevel gears. A bearing block 2 is mounted on both sides of the foundation 1 and supports a bearing shaft 3 by means of ball bearings 4. A roller 10 is mounted on -the bearing shaft 3, the details of the roller being described below.
A drive motor 5 also is mounted on the foundation 1; it drives the bear-lng shaft 3 by means of a coupling 6. A steel drum 7 is equipped with the races 8 at the area of contact with the rollers 10. The race 8 is in the form of a double ring and at the center houses the gear 9. The drlve pinion 11 meshes with the gear 9, the type of teeth being imma-terial. The embodiment shows a mangle gear, whlch is best suited for this purpose.
The roller 10 is composed of a hub 13 mounted on the bearing shaft 3 by means of an adjusting spring. The roller casing 12 is mount-ed above the hub 13 in order to form a cavity containing a rubber in-sert 14 constituting the spring support for the wheel hub. The roller casing 12 has a smooth exterior surface and extends across two pairs of hubs mounted a certain distance apart. The drive pinion 11 is pro-vided ln a clearance at the center of this distance. The sector of a circle 16 Gf the drlve pinion 11 and the diameter of the roller casing 12 precisely coincide.
- 3 -10691~;~ AN 2072 If now the roller 10 is loaded, the rubber insert 14 is compress-ed in that region which is closest to the drum. Because the drive pin-ion 11 is made integral with the roller casing 12, the latter atso is forced away from the shaft center. This displacement may be consid-ered to be the spring support. However, the axial dtstances between the crown of the gear 9 and the drive pinion 11 remain the same, so that tooth meshing remains intact.
Figure 2 shows the design of such a roller 10 in cross-section, the hub 13 being seated on a bearing shaft 3 and having a smooth sur-face at the external surface 19 thereof. The roller casing 12, on the contrary, is provtded with the arcuate recesses 18 on the tnner side 17 thereof, a rubber insert 14 being located in this space between the inner side 17 of the roller casing 18 and the exterior 19 of the hub 13.
The roller 10 therefore is designed to be a hub spring support, the rub-ber insert 14 being solidly connected to the steel parts. To achteve a progressive spring effect, varicus compound rubber layers may be em-ployed as the insert, for instance a hard one at the slde of the hub 13 and a soft one at the inside 17. Th~s is illustrated for lnstance in Figure 1 by variously dense hatchings.
Figure 3 shows a further embodtment of the roller 10, with the spring elements 20 being inserted in the space between the hub 13 and the roller casing 12, the elements being composed of arcuate leaves of spring steel and fastened by means of screws or rivets. It is pos-sible to solely insert these spring elements 20, or else to additionally provide the cavities with a rubber insert 14.
Figure 4 shows another variant, in which rubber insérts 21 are mounted in an approximately star-shaped manner at equal spacings on the hub 13, these radial rubber inserts being provided with a sheet ~ ~ :
.
.
.
1069~1 AN 2072 metal casing. The support components 22 of approximately triangular cross-sectional configuration are mounted in the cavities of these in-dividual rubber inserts to the inside 17 of the roller casing 12, the components in turn being equipped with a casing at their exterior.
These latter casings however are of such dimensions as to form a sur-- face 23 which may be easily shifted with respect to the other sheet metal casings, so that a wheel hub spring support is thereby created.
Designing the rollers as wheel hub spring supports and simul-taneously the roller casing and the drive pinion integrally ensures that the -spring support system always can respond and simultaneously the drive pinion may be moved along wlth the bearing shaft, the axial spacing being maintained constant in all cases.
The construction of the roller 10 in Figure 5 was found to be particularly advantageous. In this case, a wedge-shaped segment rubber 24 is vulcanized onto the hub 13 at 90 intervals, the segment taperlng toward the outside and being surrounded by a steel sheath, a rubber insert 21, filling the cavity, being mounted so as to act as a support elementfromtheroller casing 12. These two rubber lnserts are not vulcanized together, rather they are maintained mechanically separate by the surfaces 23, whereby the possibillty of gliding dis-placement is achieved.
Figure 6 shows a design in which the hub 13 is provided with radial extensions 13a, a rubber insert 14 again being placed into the cavity between the roller 12 and the hub 13. The purpose of this arrangement is better transmission of very large torques in the case of heavy steel drums from the motor 5 through the bearing shaft 3 to the roller 10 or the drive pinion 11.
.
10691~i1 AN 7077 These last two embodiments offer the advantage that, as al-ready mentioned, a larger torque can be transmitted, so that they are particularly well suited for very heavy operations.
It will be obvious to those skilled in the art that many modifi-cations may be made within the scope of the present invention without departing from the spirit thereof, and the invention includes all such modifications.
~' - -, ' '
Figure 2 shows the design of such a roller 10 in cross-section, the hub 13 being seated on a bearing shaft 3 and having a smooth sur-face at the external surface 19 thereof. The roller casing 12, on the contrary, is provtded with the arcuate recesses 18 on the tnner side 17 thereof, a rubber insert 14 being located in this space between the inner side 17 of the roller casing 18 and the exterior 19 of the hub 13.
The roller 10 therefore is designed to be a hub spring support, the rub-ber insert 14 being solidly connected to the steel parts. To achteve a progressive spring effect, varicus compound rubber layers may be em-ployed as the insert, for instance a hard one at the slde of the hub 13 and a soft one at the inside 17. Th~s is illustrated for lnstance in Figure 1 by variously dense hatchings.
Figure 3 shows a further embodtment of the roller 10, with the spring elements 20 being inserted in the space between the hub 13 and the roller casing 12, the elements being composed of arcuate leaves of spring steel and fastened by means of screws or rivets. It is pos-sible to solely insert these spring elements 20, or else to additionally provide the cavities with a rubber insert 14.
Figure 4 shows another variant, in which rubber insérts 21 are mounted in an approximately star-shaped manner at equal spacings on the hub 13, these radial rubber inserts being provided with a sheet ~ ~ :
.
.
.
1069~1 AN 2072 metal casing. The support components 22 of approximately triangular cross-sectional configuration are mounted in the cavities of these in-dividual rubber inserts to the inside 17 of the roller casing 12, the components in turn being equipped with a casing at their exterior.
These latter casings however are of such dimensions as to form a sur-- face 23 which may be easily shifted with respect to the other sheet metal casings, so that a wheel hub spring support is thereby created.
Designing the rollers as wheel hub spring supports and simul-taneously the roller casing and the drive pinion integrally ensures that the -spring support system always can respond and simultaneously the drive pinion may be moved along wlth the bearing shaft, the axial spacing being maintained constant in all cases.
The construction of the roller 10 in Figure 5 was found to be particularly advantageous. In this case, a wedge-shaped segment rubber 24 is vulcanized onto the hub 13 at 90 intervals, the segment taperlng toward the outside and being surrounded by a steel sheath, a rubber insert 21, filling the cavity, being mounted so as to act as a support elementfromtheroller casing 12. These two rubber lnserts are not vulcanized together, rather they are maintained mechanically separate by the surfaces 23, whereby the possibillty of gliding dis-placement is achieved.
Figure 6 shows a design in which the hub 13 is provided with radial extensions 13a, a rubber insert 14 again being placed into the cavity between the roller 12 and the hub 13. The purpose of this arrangement is better transmission of very large torques in the case of heavy steel drums from the motor 5 through the bearing shaft 3 to the roller 10 or the drive pinion 11.
.
10691~i1 AN 7077 These last two embodiments offer the advantage that, as al-ready mentioned, a larger torque can be transmitted, so that they are particularly well suited for very heavy operations.
It will be obvious to those skilled in the art that many modifi-cations may be made within the scope of the present invention without departing from the spirit thereof, and the invention includes all such modifications.
~' - -, ' '
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a shock-proof bearing for a heavy drum which is rotat-ably supported on a roller containing a spring support and having a hub, said roller being adapted to be driven by a gear drive includ-ing a driving pinion, the axial spacing between the drum, the roller and the gear drive remaining constant for every spring sup-port position, the improvement comprising that the roller and the driving pinion are integral, and said spring support is mounted between a casing of the roller and the hub thereof.
2. A bearing according to claim 1 in which the spring support is a resilient insert.
3. A bearing according to claim 1 in which the roller path and the sector of the circle of the driving pinion have the same radius.
4. A bearing according to claim 1 including a plurality of arcu-ate clearances on the interior of said roller casing and a smooth exterior of said hub.
5. A bearing according to claim 1 in which the spring support is a plurality of semi-circular spring elements and a resilient insert.
6. A bearing according to claim 1 in which the spring support is a plurality of sheathed, spoke-like resilient inserts equidis-tantly mounted to the hub in a star-shaped configuration, sheathed support components positioned in the cavities of said resilient inserts and secured to the interior of the roller cas-ing, and said sheathed resilient inserts being capable of radial displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA275,177A CA1069161A (en) | 1977-03-30 | 1977-03-30 | Bearing for heavy steel drums, in particular decorating drums |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA275,177A CA1069161A (en) | 1977-03-30 | 1977-03-30 | Bearing for heavy steel drums, in particular decorating drums |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1069161A true CA1069161A (en) | 1980-01-01 |
Family
ID=4108283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA275,177A Expired CA1069161A (en) | 1977-03-30 | 1977-03-30 | Bearing for heavy steel drums, in particular decorating drums |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1069161A (en) |
-
1977
- 1977-03-30 CA CA275,177A patent/CA1069161A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |