US651172A - Frictional gearing. - Google Patents

Frictional gearing. Download PDF

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US651172A
US651172A US467300A US1900004673A US651172A US 651172 A US651172 A US 651172A US 467300 A US467300 A US 467300A US 1900004673 A US1900004673 A US 1900004673A US 651172 A US651172 A US 651172A
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Prior art keywords
friction
shaft
secondary shaft
disk
wheels
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US467300A
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William M Wallace
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
    • F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
    • F16H15/04—Gearings providing a continuous range of gear ratios
    • F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
    • F16H15/08—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B is a disc with a flat or approximately flat friction surface
    • F16H15/10—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B is a disc with a flat or approximately flat friction surface in which the axes of the two members cross or intersect
    • F16H15/12—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B is a disc with a flat or approximately flat friction surface in which the axes of the two members cross or intersect in which one or each member is duplicated, e.g. for obtaining better transmission, for lessening the reaction forces on the bearings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19023—Plural power paths to and/or from gearing
    • Y10T74/19042—Friction-type gearing

Definitions

  • Patented lune 5 I900. W. M. WALLACE.
  • My invention relates to that class of frictional gearing wherein power from the main driving-shafts of an engine, motor, or other. prime mover is transmitted to a secondary shaft which is adapted to be rotated at a variable speed and which can be stopped entirely or reversed in its direction of rotation at will; and it has for its principal object to provide a simple and effective means of transferringpower and motion from the main driving-shaft of an engine or motor to the different devices to which it may be applied.
  • Another object of the invention is to provide means for adjusting the position of the secondary shaft to fix a predetermined rate of speed.
  • the invention consists, preferably, of a set of two driving-shafts carrying friction-wheels rotating in opposite directions, which trans mit motion to a secondary shaft through the medium of friction disks rigidly mounted thereon.
  • the invention also consists of suitable mechanism for adjusting the friction-wheels on the driving-shafts with relation to the-frictiondisks onthe secondary shaft.
  • the invention further consists of mechanism for adjusting the secondary shaft with respect to the location of the friction-wheels to increase or decrease its speed of rotation.
  • Figure l is a top plan view of one form of my improved friction-gearing; Fig. 2, an end view of the same; Fig. 3, another or modified form; Fig. 4, a side elevation of the first form, and Fig. 5 a detail of the operating-lever and connections for ad latory supports.
  • meral 1 indicates a suitable base upon which is supported one end each of two drivingshafts 2 and 3 of an engine, motor, or other prime mover. Each of these shafts has rigidly secured thereon a friction-wheel 4.
  • the shaft 2 is journaled in a suitable bearing in a fixed support and shaft 3 in a bearing in an oscillatory support, while in Fig. 3 both shafts are journaled in oscila bearing 5, provided with downwardly-extending lugs 6, to which are rigidly attached the upper ends of standards 7, the standard supporting shaft 2 being rigidly secured to the base, while the standard supporting the shaft 3 is pivoted to a lug 8, so as to permit the friction-wheel carried by said shaft to be rocked back and forth, as shown in Fig. 2.
  • the bearings 5 are also provided with upweirdly-extending lugs 9, to which are rigidly attached the lower ends of standards 10.
  • a hand operating-lever 11 To the upper end of one of the standards 10 is fulcrumed a hand operating-lever 11, which is pivotally connected with the other lever 10 by a turnbuckle connection 12, by means of Each shaft is journaled in which the distance between the two standards may be regulated.
  • the numeral 13 indicates a secondary shaft, which may be supported in any suitable manner, so long as it shall be capable of a movement toward and from the frictionwheels 4. Preferably it is supported in suitable bearings in standards 14, which are movably seated in recesses 15 in the base 1. Bigidly mounted upon the secondary shaft is a central friction-disk 16 and an outside friction-disk 17.
  • the disk 16 is provided with parallel faces and is arranged to receive power from the friction-wheels.
  • the disk 17 has an inner parallel face and is arranged to receive power from the friction-wheel on the shaft 3.
  • the secondary shaft is arranged to have a slight longitudinal movement in its bearings, and this is accomplished by a coilspring 18, which encircles a portion of the secondary shaft,with one end abutting against the inner face of one of the bearings andthe other end against a collar 19,1oose on the secondary shaft, said collar abutting against a collar 20, rigidly secured on said shaft, and ball-bearings between the adjacent faces of said collars.
  • the force exerted by the spring tends to hold the disk 16 out of contact with the friction-wheel on shaft 2 (Figs. 1, 2, and 3) when the friction-wheel on shaft 3 is moved toward the friction-disk 17.
  • the secondary shaft is provided with a suitable medium, a sprocket-wheel 21 being shown, for conveying power to the machine or other device.
  • a lug 22 At each side of the base, in line with the standards 1%, is secured a lug 22, and journaled in the lugs is a rockable bar 23.
  • an arm 24 To one end of the rockable bar is rigidly secured an arm 24, to the end of which is pivoted one end of the link 25, the other end of said link being pivoted to one of the standards 15.
  • an operatingdever 2G To the other end of said rockable bar is rigidly secured an operatingdever 2G, to which is pivoted one end of a link 27, the other end of said link being pivoted to the otherstandard l4.
  • a spring-actuated bolt 29 Secured to the base is a notched seg ment 2S, and mounted in eyes secured to the operating-lever is a spring-actuated bolt 29, which is adapted to engage the notches in the segment to hold the operating-lever in any desired position and thereby the secondary shaft at any desired point.
  • the spring actuated bolt is released from its engagement with the notches by means of a bell-crank lever 30, which is connected to the bolt by a rod 31.
  • the friction-wheel makes contact with said I 16 will move the secondary shaft a slight disi tance in its bearings, sufficient to take said disk out of contact with the friction-wheel on shaft 2. In this position no motion will be transmitted to the secondary shaft. Dilferent speeds may be obtained by the adjustment of the secondary shaft. The nearer the ment. contact with the central disk motion is transcontact of the friction-wheels withthe disks is made to the outer circumference of said disks the slower the rotation of the secondary shaftand the closer the contact to the center of the disks the greater the speed. If the relative positions of the several parts are as shown in the drawings, the rate of speed of rotation of the secondary shaft may be increased by moving the operating-lever 26 in the direction of the arrow. This will bring the standards 14; and thesecondary shaft in closer proximity to the friction-wheels, changing the contacting point of said friction-wheels with the friction-disk to a position nearer to the centor of said disk.
  • a variable speed may be obtained with the contact made at any point on the disks by varying the pressure upon the hand operating lever 11, so that the frictional contact between the friction wheels and disks may be light or heavy.
  • both main driving-shafts are supported in oscillatory bearings similar to the support for the shaft 3 shown in Fig. 2, the hand-lever ll operating to bring both friction-wheels into contact with the faces of the central disk 32 and .to separate and force them into contact with the outside disks 33 and 34:.
  • the secondary shaft it is not necessary to give the secondary shaft a longitudinal move- By bringing the fIlOlBlOII'WhGGIS into mitted to the secondary shaft in one direction, and by separating the friction-wheels land bringing them into contact with the outside disks motion is transmitted to said secondary shaft in the opposite direction, the same as in the first-described form of gearing.
  • a friction-gear for transmitting power the combination with two oppositely-drivable shafts, friction wheels secured thereon, a rigid support for one of said shafts and an oscillatory support for the other shaft, of a secondary shaft, a friction-disk secured thereon for rotating the shaft in one direction, a second friction-disk secured on said shaft for rotating it in the opposite direction, and a lever and connections for moving the friction-wheel on the movable shaft into and out of contact with the friction-disks.
  • a friction-gear for transmitting power the combination with two oppositely-drivable shafts, friction wheels secured thereon, a rigid support for one of said shafts and an oscillatory support for the other shaft, of a secondary shaft, a friction-disk secured thereon for rotating the shaft in one direction, a second friction-disk secured on said shaft for rotating it in the opposite direction, standards or arms projecting from the bearings of said driving-shafts, and a lever fulcrumed to one of said standards and connected to the other standard, whereby the friction-wheels maybe operated to engage one of the frictiondisks and separated to cause one of said friction-wheels to engage the other disk.
  • a friction-gear for transmitting power the combination with two oppositely-drivable shafts, of a friction-wheel secured on one end of each shaft, friction-disks secured on the secondary shaft, a lever and connections for causing the friction-wheels to transmit power to the disks, and a lever and connections for moving the secondary shaft to increase or de-- crease its speed of rotation.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Friction Gearing (AREA)

Description

Patented lune 5, I900. W. M. WALLACE.
FBICTIONAL GEABING.
(Application filed Feb. '9, 1,900.
(No Model.) 2 Sheets8heet I.
FZC'Q' ,7
Q Um IHHHHIIIII mam Quorum;
NORRIS ETERS 00., vnofouyncu WASH N0. 65|,I72. Patented June 5, I900. w. m. WALLACE.
FRICTIONAL- HEARING.
(Application filed Feb. 9, 1900,)
2 Sheets$heet 2.
(No Model.)
Jillillllllfi UNITED STATES PATENT FRICTIONAL CARlN'G.
SPECIFICATION forming as. of Letters Patent No. 651,172, dated June 5, 1900.
Application filed February 9,1900. Serial No. 4,673. (No model.)
T0 on whom it mag concern:
Be it known that I, WILLIAM M. WALLACE, a citizenof the United States, residing at WVashingtomin the District of Columbia, have invented certain new and useful Improvements in Frictional Gearing; and I do hereby declare the following to be a full, clear, and
exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
My invention relates to that class of frictional gearing wherein power from the main driving-shafts of an engine, motor, or other. prime mover is transmitted to a secondary shaft which is adapted to be rotated at a variable speed and which can be stopped entirely or reversed in its direction of rotation at will; and it has for its principal object to provide a simple and effective means of transferringpower and motion from the main driving-shaft of an engine or motor to the different devices to which it may be applied.
Another object of the invention is to provide means for adjusting the position of the secondary shaft to fix a predetermined rate of speed.
d Other objects of the invention-such as providing for. stopping the rotation of the secondary shaft, reversing its direction of rotation, and creating avariable frictional contact of pressure-will be readily apparent upon the further description thereof.
The invention consists, preferably, of a set of two driving-shafts carrying friction-wheels rotating in opposite directions, which trans mit motion to a secondary shaft through the medium of friction disks rigidly mounted thereon.
The invention also consists of suitable mechanism for adjusting the friction-wheels on the driving-shafts with relation to the-frictiondisks onthe secondary shaft.
The invention further consists of mechanism for adjusting the secondary shaft with respect to the location of the friction-wheels to increase or decrease its speed of rotation.
In the drawings, Figure l is a top plan view of one form of my improved friction-gearing; Fig. 2, an end view of the same; Fig. 3, another or modified form; Fig. 4, a side elevation of the first form, and Fig. 5 a detail of the operating-lever and connections for ad latory supports.
meral 1 indicates a suitable base upon which is supported one end each of two drivingshafts 2 and 3 of an engine, motor, or other prime mover. Each of these shafts has rigidly secured thereon a friction-wheel 4. In Figs. 1, 2, and 4 the shaft 2 is journaled in a suitable bearing in a fixed support and shaft 3 in a bearing in an oscillatory support, while in Fig. 3 both shafts are journaled in oscila bearing 5, provided with downwardly-extending lugs 6, to which are rigidly attached the upper ends of standards 7, the standard supporting shaft 2 being rigidly secured to the base, while the standard supporting the shaft 3 is pivoted to a lug 8, so as to permit the friction-wheel carried by said shaft to be rocked back and forth, as shown in Fig. 2. The bearings 5 are also provided with upweirdly-extending lugs 9, to which are rigidly attached the lower ends of standards 10. To the upper end of one of the standards 10 is fulcrumed a hand operating-lever 11, which is pivotally connected with the other lever 10 by a turnbuckle connection 12, by means of Each shaft is journaled in which the distance between the two standards may be regulated.
The numeral 13 indicates a secondary shaft, which may be supported in any suitable manner, so long as it shall be capable of a movement toward and from the frictionwheels 4. Preferably it is supported in suitable bearings in standards 14, which are movably seated in recesses 15 in the base 1. Bigidly mounted upon the secondary shaft is a central friction-disk 16 and an outside friction-disk 17. The disk 16 is provided with parallel faces and is arranged to receive power from the friction-wheels. The disk 17 has an inner parallel face and is arranged to receive power from the friction-wheel on the shaft 3. The secondary shaft is arranged to have a slight longitudinal movement in its bearings, and this is accomplished by a coilspring 18, which encircles a portion of the secondary shaft,with one end abutting against the inner face of one of the bearings andthe other end against a collar 19,1oose on the secondary shaft, said collar abutting against a collar 20, rigidly secured on said shaft, and ball-bearings between the adjacent faces of said collars. The force exerted by the spring tends to hold the disk 16 out of contact with the friction-wheel on shaft 2 (Figs. 1, 2, and 3) when the friction-wheel on shaft 3 is moved toward the friction-disk 17. The secondary shaft is provided with a suitable medium, a sprocket-wheel 21 being shown, for conveying power to the machine or other device.
At each side of the base, in line with the standards 1%, is secured a lug 22, and journaled in the lugs is a rockable bar 23. To one end of the rockable bar is rigidly secured an arm 24, to the end of which is pivoted one end of the link 25, the other end of said link being pivoted to one of the standards 15. To the other end of said rockable bar is rigidly secured an operatingdever 2G, to which is pivoted one end of a link 27, the other end of said link being pivoted to the otherstandard l4. Secured to the base is a notched seg ment 2S, and mounted in eyes secured to the operating-lever is a spring-actuated bolt 29, which is adapted to engage the notches in the segment to hold the operating-lever in any desired position and thereby the secondary shaft at any desired point. The spring actuated bolt is released from its engagement with the notches by means of a bell-crank lever 30, which is connected to the bolt by a rod 31.
The operation of the above-described mech anism is as follows: Upon downward pressure being applied to the hand operating-lever 11 the friction-wheel 011 shaft 3 will be caused to contact with the face of the central disk 16, and a further pressure will force said disk in contact with the friction-wheel on shaft 2. brought into contact with the disk 16 the retary motion of said friction-wheels will be transmitted to said disk and through the disk to the secondary shaft. To reverse the rotation of the secondary shaft,the hand-lever 11 is thrown upward, forcing the friction-wheel on shaft 3' out of contact with the disk 16 and into contact with the face of the disk 17. As
the friction-wheel makes contact with said I 16, will move the secondary shaft a slight disi tance in its bearings, sufficient to take said disk out of contact with the friction-wheel on shaft 2. In this position no motion will be transmitted to the secondary shaft. Dilferent speeds may be obtained by the adjustment of the secondary shaft. The nearer the ment. contact with the central disk motion is transcontact of the friction-wheels withthe disks is made to the outer circumference of said disks the slower the rotation of the secondary shaftand the closer the contact to the center of the disks the greater the speed. If the relative positions of the several parts are as shown in the drawings, the rate of speed of rotation of the secondary shaft may be increased by moving the operating-lever 26 in the direction of the arrow. This will bring the standards 14; and thesecondary shaft in closer proximity to the friction-wheels, changing the contacting point of said friction-wheels with the friction-disk to a position nearer to the centor of said disk.
A variable speed may be obtained with the contact made at any point on the disks by varying the pressure upon the hand operating lever 11, so that the frictional contact between the friction wheels and disks may be light or heavy.
In the modified form shown in Fig. 3 both main driving-shafts are supported in oscillatory bearings similar to the support for the shaft 3 shown in Fig. 2, the hand-lever ll operating to bring both friction-wheels into contact with the faces of the central disk 32 and .to separate and force them into contact with the outside disks 33 and 34:. In this form with two outside disks it is not necessary to give the secondary shaft a longitudinal move- By bringing the fIlOlBlOII'WhGGIS into mitted to the secondary shaft in one direction, and by separating the friction-wheels land bringing them into contact with the outside disks motion is transmitted to said secondary shaft in the opposite direction, the same as in the first-described form of gearing. As soon as the friction-wheels are 1 Various modifications and changes in the details of construction may be made without departing from the principle thereof-such, ffor instance, as supporting the secondary 'shaft in movable bearings arranged in stationary standards or supports, it only being necessary to provide for moving said shaft and not its supports toward and from the friction-wheels.
Having thus fully described my invention,
3 what I claim as new, and desire tosecure by i Letters Patent, is-
1. In a friction-gear for transmitting power,
the combination with two oppositely-drivable shafts and a friction-wheel secured on one end for causing the friction-wheels to transmit power to the disks and means for moving said secondary shaft to increase or decrease its speed of rotation.
2. In a friction-gear for transmitting power,
1 the combination with two oppositely-drivable shafts, of a friction-wheel. secured on one end of each shaft, of a secondary shaft, friction- .disks secured on the secondary shaft, means for causing the friction-wheels to transmit power to the friction-disks and an operating stints lever and connections for moving the secondary shaft, to increase or decrease its speed of rotation.
3. In a friction-gear for transmitting power, the combination with two oppositely-drivable shafts, friction wheels secured thereon, a rigid support for one of said shafts and an oscillatory support for the other shaft, of a secondary shaft, a friction-disk secured thereon for rotating the shaft in one direction, a second friction-disk secured on said shaft for rotating it in the opposite direction, and a lever and connections for moving the friction-wheel on the movable shaft into and out of contact with the friction-disks.
at. In a friction-gear for transmitting power, the combination with two oppositely-drivable shafts, friction wheels secured thereon, a rigid support for one of said shafts and an oscillatory support for the other shaft, of a secondary shaft, a friction-disk secured thereon for rotating the shaft in one direction, a second friction-disk secured on said shaft for rotating it in the opposite direction, standards or arms projecting from the bearings of said driving-shafts, and a lever fulcrumed to one of said standards and connected to the other standard, whereby the friction-wheels maybe operated to engage one of the frictiondisks and separated to cause one of said friction-wheels to engage the other disk.
5. In a friction-gear for transmitting power, the combination with two oppositely-drivable shafts, of a friction-wheel secured on one end of each shaft, friction-disks secured on the secondary shaft, a lever and connections for causing the friction-wheels to transmit power to the disks, and a lever and connections for moving the secondary shaft to increase or de-- crease its speed of rotation.
6. In a friction-gear for transmitting power,
shafts, and a friction-wheel secured on oneend of each shaft, of a secondary shaft, longitudinally movable in its bearings, friction disks secured on the secondary shaft, means for causing the friction-wheels to transmit motion to said disks, means for moving the secondary shaft to increase or decrease its speed of rotation, and means for holding said secondary shaft at any position to which it may be moved.
In testimony whereof I affix my signature in the presence of two witnesses.
WILLIAM M. WALLACE. Witnesses:
J J. NELLIGAN, J. R. NOTTINGHAM.
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