CA1234301A - Balanced pulley construction - Google Patents
Balanced pulley constructionInfo
- Publication number
- CA1234301A CA1234301A CA000473678A CA473678A CA1234301A CA 1234301 A CA1234301 A CA 1234301A CA 000473678 A CA000473678 A CA 000473678A CA 473678 A CA473678 A CA 473678A CA 1234301 A CA1234301 A CA 1234301A
- Authority
- CA
- Canada
- Prior art keywords
- pulley
- washer
- end wall
- wall
- projection
- 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
Landscapes
- Pulleys (AREA)
Abstract
ABSTRACT
A pulley has a planar end wall and an annular wall extending axially outwardly therefrom.
The annular wall is formed with belt receiving grooves and the end wall is formed with a central opening for mounting the pulley on a hub or shaft.
A stamped sheet metal washer having a generally annular configuration is formed with a central hole and an integral projection extending radially outwardly from the outer edge of the washer. The washer is firmly attached to the end wall of the pulley preferably by welding or by bonding with an acrylic structural adhesive with the central hole of the washer being concentric to the central opening of the end wall.
The projection is positioned to counterbalance any unbalance in the annular wall that may have developed therein during forming of the pulley.
A pulley has a planar end wall and an annular wall extending axially outwardly therefrom.
The annular wall is formed with belt receiving grooves and the end wall is formed with a central opening for mounting the pulley on a hub or shaft.
A stamped sheet metal washer having a generally annular configuration is formed with a central hole and an integral projection extending radially outwardly from the outer edge of the washer. The washer is firmly attached to the end wall of the pulley preferably by welding or by bonding with an acrylic structural adhesive with the central hole of the washer being concentric to the central opening of the end wall.
The projection is positioned to counterbalance any unbalance in the annular wall that may have developed therein during forming of the pulley.
Description
~.~3430~
BALAN_ED PULLEY CO`~STRUCTION
TECHNICAL FIELD
The invention relates to the balancing of rotating members and in particular pulleys or sheaves having belt-receiving grooves formed in the outer periphery. More particularly the invention relates to a pulley having a balancing washer permanently attached thereto which in addition to reducing any unbalance in the pulley, also functions as a spacer washer for mounting the pulley on a shaft.
BACKGROUND ART
Grooved pulleys or sheaves have been produced for many years with grooves in the outer periphery thereof for mounting on ro-tating shafts for receiving belts in the grooves to transmit motion either to or from the shaft on which the pulley is mounted. These grooved pulleys have been -produced by a variety of manufacturing procedures such as stamping, spinning or slitting of sheet steel or formed by metal casting or forging operations. Even though the particular manufacturing operation for prodùcing such pulleys is carried out with precision and accuracy, an unbalance may result in the fi~al produced pulley. Any unbalance in a rotating mass such as a pulley will result in noise and vibration which shortens the life of the pulley~ shaft mounting bearings and attached belts in addition to producing an unsatisfactory condition to the vehicle or equlpment on which the ~3~3~
pulley is mounted. Thus, it is necessary that a pulley be balanced by some means to eliminate any unbalance ln the pulley prior to mounting it on a shaft of a vehicle or other equipment on which it may be used.
Various methods and devices have been devised in the past for eliminating pulley un-balance such as by placing putty on the hub wall or annular side wall of the pulley as a counter-balancing weight at the location necessary to correct for the unbalance. Another manner of correcting such unbalance is to weld slugs of metal at the necessary position on the hub wall or annular side wall to correct for the unbalance.
Also another means of balancing pulleys is to remove metal from the area where the unbalance occurs by drilling or milling procedures. Still other methods and devices involve the attachment of metal components on the pulley by rivets, bolts or splined connections with the hubs. Examples of such prior balancing means for a pulley or rotating object are shown in Patent Nos. 79,405; 2,216,308;
BALAN_ED PULLEY CO`~STRUCTION
TECHNICAL FIELD
The invention relates to the balancing of rotating members and in particular pulleys or sheaves having belt-receiving grooves formed in the outer periphery. More particularly the invention relates to a pulley having a balancing washer permanently attached thereto which in addition to reducing any unbalance in the pulley, also functions as a spacer washer for mounting the pulley on a shaft.
BACKGROUND ART
Grooved pulleys or sheaves have been produced for many years with grooves in the outer periphery thereof for mounting on ro-tating shafts for receiving belts in the grooves to transmit motion either to or from the shaft on which the pulley is mounted. These grooved pulleys have been -produced by a variety of manufacturing procedures such as stamping, spinning or slitting of sheet steel or formed by metal casting or forging operations. Even though the particular manufacturing operation for prodùcing such pulleys is carried out with precision and accuracy, an unbalance may result in the fi~al produced pulley. Any unbalance in a rotating mass such as a pulley will result in noise and vibration which shortens the life of the pulley~ shaft mounting bearings and attached belts in addition to producing an unsatisfactory condition to the vehicle or equlpment on which the ~3~3~
pulley is mounted. Thus, it is necessary that a pulley be balanced by some means to eliminate any unbalance ln the pulley prior to mounting it on a shaft of a vehicle or other equipment on which it may be used.
Various methods and devices have been devised in the past for eliminating pulley un-balance such as by placing putty on the hub wall or annular side wall of the pulley as a counter-balancing weight at the location necessary to correct for the unbalance. Another manner of correcting such unbalance is to weld slugs of metal at the necessary position on the hub wall or annular side wall to correct for the unbalance.
Also another means of balancing pulleys is to remove metal from the area where the unbalance occurs by drilling or milling procedures. Still other methods and devices involve the attachment of metal components on the pulley by rivets, bolts or splined connections with the hubs. Examples of such prior balancing means for a pulley or rotating object are shown in Patent Nos. 79,405; 2,216,308;
2,494,756; 2,993,386; 3,349,640; 3,611,829; 3,808,660 and 4,003,265.
Although these existing balancing means may provide a satisfactory solution to an unbalanced condition of a rotating member, the mechanism by which the unbalanced condition is eliminated is relatively expensive to produce and install on the ; 30 rotating member. For example, when a balancing device is mounted on a pulley that is used on a passenger automobile or vehicle, even a savings in material and installation cost of a few cents will result in a considerable cumulative savings to the manufacturer since millions of such vehicles are produced having the balanced pulley as a part thereof.
:~343~
One problem that has occurred with some of the prior balancing devices is that the counterbalance weight such as putty or welded globs of metal would loosen and fall off the pulley due to the centrifugal forces exerted tnereon. Stfll other devices had to be rebalanced when the pulley was removed from the shaft for repair or when performing work in the particular equipment on which the pulley was mounted. If the pulley was not reinstalled in the correct position, it would multiply the unbalanced condition. Often the mechanic performing the work would not be aware of the unbalanced condition of the pulley nor would he have available equipment for checking the balance thereof.
Thus, the need has existed for an extremely simple and inexpensive balancing device which can be permanently mounted on a pulley to balance the same which will not become loose or disengaged from the pulley after long periods of use or when subjected to centrifugal forces and used in harsh environments as can occur with prior balancing means and devices once attached to the pulley, and which will not require any further adjustment or balancing even if the pulley is removed from its shaft for maintenance purposes.
According to the present invention there is provided an improved balanced pulley construction which has a pulley cap with a planar end wall formed with a central opening and an annular wall formed with belt receiving grooves therein extending axially outwardly from the end wall. A balancing washer is provided which has a generally annular configuration formed with a central hole and having a projection extending readially outwardly therefrom, the central hole having a diameter equal to or greater than the diameter of the central opening in the planar end wall of the pulley cup. ~eans is provided for permanently attaching the balancing washer on the end wall of the pulley cup with the central hole of the washer being concentric with the central opening in the end wall, and with the washer projection being positioned to counterbalance and unbalanced condition in the annular mab/~
~23~35~
wall of the pulley cup.
It is an object of the invention to provide a balanced pulley construction having a balancing washer rigidly and permanently mounted on the hub wall of the pulley to reduce an unbalanced condition in the pulley to an amount below predetermined allowable limits. Another objective is to provide such an improved balanced pulley construction in which the balancing washer can be mass produced extremely easy and inexpensively by simple metal stamping procedures, In which the balancing washer has a usual annular washer configuration with a projection or lobe formed integrally with the washer body during the stamping thereof. The balancing projection may have a predetermined amount of balancing correction, which amountwill not exceed the allowable limits of unbalance in a pulley.
In a specific embodiment of the invention there is provided a balanced pulley in which the balancing washer is attached to the hub wall of the pulley by welding or with an acrylic structural adhesive, thereby eliminating any possibility of the washer becoming disengaged from the pulley even after years of use and under harsh conditions.
The balancing washer, which in addition to eliminating unbalanced conditions in the pulley, may also function as a spacer washer which is engaged by a clamping nut when the pulley is mounted on a rotating shaft of the vehicle such as the crankshaft as in one specific type of installation, thereby reducing cost by eliminating one of the components of the pulley assembly.
mab/ ~
~;~3'~3~
BRIEF DESCRIPTION OF THE DRAWINGS
A preferred embodiment of the invention, illus-trative of the best mode in which applicant has contemplated applying the principles, is set forth in the following des-cription and shown in the drawings and is particularly and distinctly pointed out and set forth in the appended claims.
FIG. 1 is a perspective view of the balancing washer which is mounted on the pulley for balancing the same;
FIG. 2 is a perspective view of the improved balanced pulley with portions of the pulley broken away;
FIG. 3 is an end view of the balanced pulley of FIG. 2;
FIG. 4 is a fragmentary sectional view taken on line 4-4, FIG. 3; and mab/)-`
A
Although these existing balancing means may provide a satisfactory solution to an unbalanced condition of a rotating member, the mechanism by which the unbalanced condition is eliminated is relatively expensive to produce and install on the ; 30 rotating member. For example, when a balancing device is mounted on a pulley that is used on a passenger automobile or vehicle, even a savings in material and installation cost of a few cents will result in a considerable cumulative savings to the manufacturer since millions of such vehicles are produced having the balanced pulley as a part thereof.
:~343~
One problem that has occurred with some of the prior balancing devices is that the counterbalance weight such as putty or welded globs of metal would loosen and fall off the pulley due to the centrifugal forces exerted tnereon. Stfll other devices had to be rebalanced when the pulley was removed from the shaft for repair or when performing work in the particular equipment on which the pulley was mounted. If the pulley was not reinstalled in the correct position, it would multiply the unbalanced condition. Often the mechanic performing the work would not be aware of the unbalanced condition of the pulley nor would he have available equipment for checking the balance thereof.
Thus, the need has existed for an extremely simple and inexpensive balancing device which can be permanently mounted on a pulley to balance the same which will not become loose or disengaged from the pulley after long periods of use or when subjected to centrifugal forces and used in harsh environments as can occur with prior balancing means and devices once attached to the pulley, and which will not require any further adjustment or balancing even if the pulley is removed from its shaft for maintenance purposes.
According to the present invention there is provided an improved balanced pulley construction which has a pulley cap with a planar end wall formed with a central opening and an annular wall formed with belt receiving grooves therein extending axially outwardly from the end wall. A balancing washer is provided which has a generally annular configuration formed with a central hole and having a projection extending readially outwardly therefrom, the central hole having a diameter equal to or greater than the diameter of the central opening in the planar end wall of the pulley cup. ~eans is provided for permanently attaching the balancing washer on the end wall of the pulley cup with the central hole of the washer being concentric with the central opening in the end wall, and with the washer projection being positioned to counterbalance and unbalanced condition in the annular mab/~
~23~35~
wall of the pulley cup.
It is an object of the invention to provide a balanced pulley construction having a balancing washer rigidly and permanently mounted on the hub wall of the pulley to reduce an unbalanced condition in the pulley to an amount below predetermined allowable limits. Another objective is to provide such an improved balanced pulley construction in which the balancing washer can be mass produced extremely easy and inexpensively by simple metal stamping procedures, In which the balancing washer has a usual annular washer configuration with a projection or lobe formed integrally with the washer body during the stamping thereof. The balancing projection may have a predetermined amount of balancing correction, which amountwill not exceed the allowable limits of unbalance in a pulley.
In a specific embodiment of the invention there is provided a balanced pulley in which the balancing washer is attached to the hub wall of the pulley by welding or with an acrylic structural adhesive, thereby eliminating any possibility of the washer becoming disengaged from the pulley even after years of use and under harsh conditions.
The balancing washer, which in addition to eliminating unbalanced conditions in the pulley, may also function as a spacer washer which is engaged by a clamping nut when the pulley is mounted on a rotating shaft of the vehicle such as the crankshaft as in one specific type of installation, thereby reducing cost by eliminating one of the components of the pulley assembly.
mab/ ~
~;~3'~3~
BRIEF DESCRIPTION OF THE DRAWINGS
A preferred embodiment of the invention, illus-trative of the best mode in which applicant has contemplated applying the principles, is set forth in the following des-cription and shown in the drawings and is particularly and distinctly pointed out and set forth in the appended claims.
FIG. 1 is a perspective view of the balancing washer which is mounted on the pulley for balancing the same;
FIG. 2 is a perspective view of the improved balanced pulley with portions of the pulley broken away;
FIG. 3 is an end view of the balanced pulley of FIG. 2;
FIG. 4 is a fragmentary sectional view taken on line 4-4, FIG. 3; and mab/)-`
A
3~1 FIG. 5 is a fragmentary sectional view similar to FIG. 4 showing the improved balanced pu]ley mounted on a vehicle crankshaft.
Similar numerals refer to similar parts throughout the drawings.
BEST MODE FOR CARRYING OUT THE INVENTION
The improved balanced pulley construction is indicated generally at 1, and is shown partic-cularly in FIGS. 2 and 3. Pulley 1 includes as the main components a balancing washer and a grooved pulley cup indicated generally at 2 and 3, respectively. Balancing washer 2 is a stamped steel component having an annular configuration with spaced annular surfaces 4 and 5 connected by a cylindrical edge 6, and a central circular hole 7.
In accordance with one of the features of the invention, a projection or lobe 8 is formed integrally with the remaining portion of washer 2 and projects radially outwardly from a section thereof. Projection 8 provides an unbalanced condition to washer 2 and preferably has a curved outer surface 9.
Washer 2 is adapted to be assembled with pulley cup 3 which preferably is of the type shown in FIGS. 2 and 5 which is mounted on the crankshaft of a vehicle engine. Pulley cup 3 incoudes a planar end wall 10 formed with a central circular opening 11. Wall 10 usually is referred to as the hub wall of a pulley. A flat sided keyway 12 also may be formed in end wall 10 and communicates with opening 11 for engagement with a key 13 formed on a crankshaft 14 on which pulley 1 preferably is mounted as shown in FIG. 5. Pulley cup 3 includes a first annular side wall portion 16 which is integral with end wall 10 and which is formed with ~23~30~
a plurality of belt receiving grooves 17. A
second annular side wall portion 18 may be formed integrally with or mechanically connected to side wall portion 16 by projection welds. Side wall portion 18 also is provided with a plurality of belt receiving grooves 19. The outer end of side wall portion 18 terminates in a flange 20 to provide stlffening for the annular side walls and which defines open end 21 of the pulley.
In accordance with another features of the invention, washer 2 is mounted on inside surface 23 of end wall 10 preferably by bonding it to the metal with acrylic structural adhesive or in certain applications by welds. The diameter of washer opening 5 is equal to or larger than the diameter of hub wall opening 11 and is concentric therewith when washer 2 is mounted on inside surface 21 of wall 10.
; Prior to mounting washer 2 on hub wall 10, pulley cup 3 is checked in usual balance testing apparatus for determining any unbalance in the pulley and the location of the unbalanced area. Placement of projection 8 of washer 2 in a predetermined radial position will enable a balanced pulley to be obtained since projection 8 will effectively counterbalance any unbalance occurring in pulley cup 3. After properly positioning washer projection 8, bonding or welding operation then is carried out which permanently attaches washer 2 to pulley hub wall 10.
Another important feature of improved balanced pulley 1 is that washer 2, in addition to providing a balancing effect on pulley cup 3, also functions as a spacer washer when mounting pulley 1 on crankshaft 14 (FIG. 5). A nut 26 clamps outside surface 27 of hub wall 10 tightly against an annular shoulder 28 formed on the end of crankshaft 14. A spaced washer (not shown) ::~23~3~
may be interposed between the forward surface of washer 2 and nut 26 for certain applications. Nut 26 clampingly engages washer 2 which eliminates a separate washer as heretofore required in prior installations of mounting pulley cup 3 on crank shaft 14. Thus, in addition to providing a balancing action to the pulley, it also eliminates a separate washer for mounting the pulley on the crankshaf-t of a vehicle.
In a preferred embodiment the eccentricity of washer 2 provided by projection 8 provides a 0.20 inch ounces out of balance correction factor which is generally equal to the permissible amount of allowable out of balance and is slightly greater than the maximum out of balance that will occur in the particular manu-facturing process for producing pulley cup 3. Therefore, once properly positioned on hub wall lO in the light area of the pulley the unbalance provided by projection 8 of washer 2 will not result in unbalancing the pulley beyond the allowable unbalanced limit even if the pulley is under the allowed tolerance.
Thus, washer 2 is an extremely simple, inex-pensive member which can be mass produced by simple stamping procedures, in which the balancing projection portion thereof is formed integrally with the remaining portion of the washer in which washer 3 enables improved ' pulley 1 to be balanced in a permanent manner by securing the washer on the hub wall of a pulley cup by welding thereby eliminatina the heretofore removal of material from the unbalanced area of the pulley or the spot welding of slugs of metal at various points on the pulley walls, and which eliminates -the need for a separate spacer washer for mounting improved pulley l on a vehicle crankshaft. In the preferred embodiment ~;
washer 2 will have an outer diameter of 2.25 inches and . ~
~;~343~
an inner diameter of 1.50 inches. Projection 8 will project radially outwardly a distance of 0.15 inches shown by arrows A in FI~. 3 and will have an arcuate length of approximately 1.26 inches (arrows B). The radius of curvature of projection 8 is 3/4 inch and it has an arcuate length of approximately 70 (angle D).
Accordingly, the improved pulley con-struction is simplified, provides an effective, safe, inexpensive, and efficient device which achieves all the enumerated objectives, provides for eliminating difficulties encountered with prior devices, and solves problems and obtains new results in the art.
In the foregoing description, certain terms have been used for brevity, clearness and under-standing; but no unnecessary limitations are to be implied therefrom beyond the requirements of the prior art, because such terms are used for descriptive purposes and are intended to be broadly construed.
Moreover, the description and illus-tration of the invention is by way of example, and the scope of the invention is not limited to the exact details shown or described.
Having now described the features, discoveries and principles of the invention, the manner in which the improved balanced pulley con-struction is constructed and used, the characteristics of the construction, and the advantageous, new and useful results obtained; the new and useful structures, `~ 30 devices, elements, arrangements, parts, and combi-nations, are set forth in the appended claims.
Similar numerals refer to similar parts throughout the drawings.
BEST MODE FOR CARRYING OUT THE INVENTION
The improved balanced pulley construction is indicated generally at 1, and is shown partic-cularly in FIGS. 2 and 3. Pulley 1 includes as the main components a balancing washer and a grooved pulley cup indicated generally at 2 and 3, respectively. Balancing washer 2 is a stamped steel component having an annular configuration with spaced annular surfaces 4 and 5 connected by a cylindrical edge 6, and a central circular hole 7.
In accordance with one of the features of the invention, a projection or lobe 8 is formed integrally with the remaining portion of washer 2 and projects radially outwardly from a section thereof. Projection 8 provides an unbalanced condition to washer 2 and preferably has a curved outer surface 9.
Washer 2 is adapted to be assembled with pulley cup 3 which preferably is of the type shown in FIGS. 2 and 5 which is mounted on the crankshaft of a vehicle engine. Pulley cup 3 incoudes a planar end wall 10 formed with a central circular opening 11. Wall 10 usually is referred to as the hub wall of a pulley. A flat sided keyway 12 also may be formed in end wall 10 and communicates with opening 11 for engagement with a key 13 formed on a crankshaft 14 on which pulley 1 preferably is mounted as shown in FIG. 5. Pulley cup 3 includes a first annular side wall portion 16 which is integral with end wall 10 and which is formed with ~23~30~
a plurality of belt receiving grooves 17. A
second annular side wall portion 18 may be formed integrally with or mechanically connected to side wall portion 16 by projection welds. Side wall portion 18 also is provided with a plurality of belt receiving grooves 19. The outer end of side wall portion 18 terminates in a flange 20 to provide stlffening for the annular side walls and which defines open end 21 of the pulley.
In accordance with another features of the invention, washer 2 is mounted on inside surface 23 of end wall 10 preferably by bonding it to the metal with acrylic structural adhesive or in certain applications by welds. The diameter of washer opening 5 is equal to or larger than the diameter of hub wall opening 11 and is concentric therewith when washer 2 is mounted on inside surface 21 of wall 10.
; Prior to mounting washer 2 on hub wall 10, pulley cup 3 is checked in usual balance testing apparatus for determining any unbalance in the pulley and the location of the unbalanced area. Placement of projection 8 of washer 2 in a predetermined radial position will enable a balanced pulley to be obtained since projection 8 will effectively counterbalance any unbalance occurring in pulley cup 3. After properly positioning washer projection 8, bonding or welding operation then is carried out which permanently attaches washer 2 to pulley hub wall 10.
Another important feature of improved balanced pulley 1 is that washer 2, in addition to providing a balancing effect on pulley cup 3, also functions as a spacer washer when mounting pulley 1 on crankshaft 14 (FIG. 5). A nut 26 clamps outside surface 27 of hub wall 10 tightly against an annular shoulder 28 formed on the end of crankshaft 14. A spaced washer (not shown) ::~23~3~
may be interposed between the forward surface of washer 2 and nut 26 for certain applications. Nut 26 clampingly engages washer 2 which eliminates a separate washer as heretofore required in prior installations of mounting pulley cup 3 on crank shaft 14. Thus, in addition to providing a balancing action to the pulley, it also eliminates a separate washer for mounting the pulley on the crankshaf-t of a vehicle.
In a preferred embodiment the eccentricity of washer 2 provided by projection 8 provides a 0.20 inch ounces out of balance correction factor which is generally equal to the permissible amount of allowable out of balance and is slightly greater than the maximum out of balance that will occur in the particular manu-facturing process for producing pulley cup 3. Therefore, once properly positioned on hub wall lO in the light area of the pulley the unbalance provided by projection 8 of washer 2 will not result in unbalancing the pulley beyond the allowable unbalanced limit even if the pulley is under the allowed tolerance.
Thus, washer 2 is an extremely simple, inex-pensive member which can be mass produced by simple stamping procedures, in which the balancing projection portion thereof is formed integrally with the remaining portion of the washer in which washer 3 enables improved ' pulley 1 to be balanced in a permanent manner by securing the washer on the hub wall of a pulley cup by welding thereby eliminatina the heretofore removal of material from the unbalanced area of the pulley or the spot welding of slugs of metal at various points on the pulley walls, and which eliminates -the need for a separate spacer washer for mounting improved pulley l on a vehicle crankshaft. In the preferred embodiment ~;
washer 2 will have an outer diameter of 2.25 inches and . ~
~;~343~
an inner diameter of 1.50 inches. Projection 8 will project radially outwardly a distance of 0.15 inches shown by arrows A in FI~. 3 and will have an arcuate length of approximately 1.26 inches (arrows B). The radius of curvature of projection 8 is 3/4 inch and it has an arcuate length of approximately 70 (angle D).
Accordingly, the improved pulley con-struction is simplified, provides an effective, safe, inexpensive, and efficient device which achieves all the enumerated objectives, provides for eliminating difficulties encountered with prior devices, and solves problems and obtains new results in the art.
In the foregoing description, certain terms have been used for brevity, clearness and under-standing; but no unnecessary limitations are to be implied therefrom beyond the requirements of the prior art, because such terms are used for descriptive purposes and are intended to be broadly construed.
Moreover, the description and illus-tration of the invention is by way of example, and the scope of the invention is not limited to the exact details shown or described.
Having now described the features, discoveries and principles of the invention, the manner in which the improved balanced pulley con-struction is constructed and used, the characteristics of the construction, and the advantageous, new and useful results obtained; the new and useful structures, `~ 30 devices, elements, arrangements, parts, and combi-nations, are set forth in the appended claims.
Claims (9)
1. An improved balanced pulley con-struction including:
a) a pulley cup having a planar end wall formed with a central opening and an annular wall formed with belt receiving grooves therein extending axially outwardly from said end wall;
b) a balancing washer having a generally annular configuration formed with a central hole and having a projection extending radially outwardly therefrom, said central hole having a diameter equal to or greater than the diameter of the central opening of the planar end wall; and c) means for permanently attaching the balancing washer on the end wall of the pulley cup with the central hole of the washer being concentric with the central opening of the end wall, and with the washer projection being positioned to counter-balance an unbalanced condition in the annular wall of the pulley cup.
a) a pulley cup having a planar end wall formed with a central opening and an annular wall formed with belt receiving grooves therein extending axially outwardly from said end wall;
b) a balancing washer having a generally annular configuration formed with a central hole and having a projection extending radially outwardly therefrom, said central hole having a diameter equal to or greater than the diameter of the central opening of the planar end wall; and c) means for permanently attaching the balancing washer on the end wall of the pulley cup with the central hole of the washer being concentric with the central opening of the end wall, and with the washer projection being positioned to counter-balance an unbalanced condition in the annular wall of the pulley cup.
2. The pulley construction defined in claim 1 in which the projection has a predetermined out of balance of less than 0.2 inch ounces.
3. The pulley construction defined in claim 1 in which the projection has a curved outer edge.
4. The pulley construction defined in claim 1 in which the washer is attached to the surface of the planar wall which is located within the interior of the axially projecting annular wall by welds.
5. The pulley construction defined in claim 1 in which the balancing washer is attached to the planar end wall by an adhesive.
6. The pulley construction defined in claim 1 in which the balancing washer has an outer diameter of approximately 2.25 inches and an inner diameter of approximately 1.50 inches; and in which the projection extends throughout an arc of approximately 70°.
7. The pulley construction defined in claim 1 in which the amount of eccentricity provided by the projection is approximately equal to the maximum out of balance permitted in said pulley.
8. An improved balanced pulley construction including:
(a) a pulley cup having a planar end wall formed with a central opening and an annular wall formed with belt receiving grooves therein extending axially outwardly from said end wall;
(b) a one-piece stamped steel balancing washer having a generally flat annular configuration formed with a central hole and having an integrally formed projection extending radially outwardly therefrom, said central hole having a diameter equal to or greater than the diameter of the central opening of the planar end wall; and (c) means for permanently bonding the balancing washer on and flush against the end wall of the pulley cup without the use of additional fasteners and spaced radially inwardly from the annular wall with the central hole of the washer being concentric with the central opening of the end wall, and with the washer projection being positioned to counterbalance an unbalanced condition in the annular wall of the pulley cup, and with said washer being adapted to be engaged by a fastening nut which mounts the pulley cup on a shaft which projects through the central opening of the cup wall and central hole of the washer.
9. A balanced pulley cup and shaft combination including:
(a) a pulley cup having a planar end wall formed with a central opening and an annular wall formed with a belt receiving grooves therein extending axially outwardly from said end wall;
(b) a one-piece stamped steel balancing washer having a generally flat annular configuration formed with a central hole and having an integrally formed projection extending radially outwardly therefrom, said central hole having a diameter equal to or greater than the diameter of the central opening of the planar end wall;
(c) means for permanently bonding the balancing washer on and flush against the end wall of the pulley cup without the use of additional fasteners and spaced radially inwardly from the annular wall with the central hole of
(a) a pulley cup having a planar end wall formed with a central opening and an annular wall formed with belt receiving grooves therein extending axially outwardly from said end wall;
(b) a one-piece stamped steel balancing washer having a generally flat annular configuration formed with a central hole and having an integrally formed projection extending radially outwardly therefrom, said central hole having a diameter equal to or greater than the diameter of the central opening of the planar end wall; and (c) means for permanently bonding the balancing washer on and flush against the end wall of the pulley cup without the use of additional fasteners and spaced radially inwardly from the annular wall with the central hole of the washer being concentric with the central opening of the end wall, and with the washer projection being positioned to counterbalance an unbalanced condition in the annular wall of the pulley cup, and with said washer being adapted to be engaged by a fastening nut which mounts the pulley cup on a shaft which projects through the central opening of the cup wall and central hole of the washer.
9. A balanced pulley cup and shaft combination including:
(a) a pulley cup having a planar end wall formed with a central opening and an annular wall formed with a belt receiving grooves therein extending axially outwardly from said end wall;
(b) a one-piece stamped steel balancing washer having a generally flat annular configuration formed with a central hole and having an integrally formed projection extending radially outwardly therefrom, said central hole having a diameter equal to or greater than the diameter of the central opening of the planar end wall;
(c) means for permanently bonding the balancing washer on and flush against the end wall of the pulley cup without the use of additional fasteners and spaced radially inwardly from the annular wall with the central hole of
Claim 9 cont'd.
the washer being concentric with the central opening of the end wall; and with the washer projection being positioned to counterbalance an unbalanced condition in the annular wall of the pulley cup;
(d) a shaft having an annular shoulder and a threaded end extending outwardly from said shoulder, with the threaded end extending through the aligned pulley cup opening and washer hole; and (e) a nut threadably mounted on the threaded end of the shaft and clampingly engaged with the washer to mount the pulley cup on the shaft in a clamped position against the annular shoulder.
the washer being concentric with the central opening of the end wall; and with the washer projection being positioned to counterbalance an unbalanced condition in the annular wall of the pulley cup;
(d) a shaft having an annular shoulder and a threaded end extending outwardly from said shoulder, with the threaded end extending through the aligned pulley cup opening and washer hole; and (e) a nut threadably mounted on the threaded end of the shaft and clampingly engaged with the washer to mount the pulley cup on the shaft in a clamped position against the annular shoulder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000473678A CA1234301A (en) | 1985-02-06 | 1985-02-06 | Balanced pulley construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000473678A CA1234301A (en) | 1985-02-06 | 1985-02-06 | Balanced pulley construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1234301A true CA1234301A (en) | 1988-03-22 |
Family
ID=4129768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000473678A Expired CA1234301A (en) | 1985-02-06 | 1985-02-06 | Balanced pulley construction |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1234301A (en) |
-
1985
- 1985-02-06 CA CA000473678A patent/CA1234301A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2562710C (en) | Apparatus and method of balancing a shaft | |
| US5842388A (en) | Vehicle hub and brake machining method | |
| US5884980A (en) | Vehicle brake and hub attachment system and method | |
| US5457883A (en) | Method of reducing replacement flywheel inventory | |
| KR102347563B1 (en) | Torsional vibration dampers | |
| EP1521920A1 (en) | An integrated pulley-torsional damper assembly | |
| US4943263A (en) | Structure for mounting damper on rotary shaft | |
| EP2955414A1 (en) | Tensioning device and method for assembling such a tensioning device | |
| US4522612A (en) | Balanced pulley construction | |
| US6647784B2 (en) | Balance adjusted wheel and manufacturing method | |
| CN115343028A (en) | Over-rotation test tool and test method for extremely-deformed wheel disc | |
| CA1234301A (en) | Balanced pulley construction | |
| JPS64390Y2 (en) | ||
| US5407047A (en) | Arrangement for securing a clutch to a crankshaft | |
| JP2003262254A (en) | Flexible fly wheel for clutch, in particular, clutch for automobile | |
| US20060293137A1 (en) | Pulley hub | |
| US4570772A (en) | Clutch with reaction plate in two parts, especially for motor vehicles | |
| US7077006B2 (en) | High-accuracy wheel spacer | |
| US7481050B2 (en) | Hydrodynamic torque converter | |
| US20220029479A1 (en) | Hybrid module and shipping jig | |
| US7597029B2 (en) | Damper assembly with reinforcing plate | |
| KR19990060233A (en) | Method of manufacturing damper pulley | |
| CN110617298A (en) | Hub for torsional vibration damper | |
| JP3621590B2 (en) | Vehicle drive plate | |
| CN220910346U (en) | Flywheel frequency modulation device on reciprocating compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |