US2900831A - Shock absorbing mechanism - Google Patents

Shock absorbing mechanism Download PDF

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Publication number
US2900831A
US2900831A US622421A US62242156A US2900831A US 2900831 A US2900831 A US 2900831A US 622421 A US622421 A US 622421A US 62242156 A US62242156 A US 62242156A US 2900831 A US2900831 A US 2900831A
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United States
Prior art keywords
feed rollers
clutch shaft
flexible belt
shock absorbing
idler
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Expired - Lifetime
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US622421A
Inventor
Lawrence A Wilson
Benjamin M Durfee
Harry J Tashjian
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International Business Machines Corp
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International Business Machines Corp
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Priority to US622421A priority Critical patent/US2900831A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K13/00—Conveying record carriers from one station to another, e.g. from stack to punching mechanism
    • G06K13/02—Conveying record carriers from one station to another, e.g. from stack to punching mechanism the record carrier having longitudinal dimension comparable with transverse dimension, e.g. punched card
    • G06K13/04—Details, e.g. flaps in card-sorting apparatus
    • G06K13/05—Capstans; Pinch rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • 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
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/02—Gearings for conveying rotary motion by endless flexible members with belts; with V-belts
    • F16H7/023—Gearings for conveying rotary motion by endless flexible members with belts; with V-belts with belts having a toothed contact surface or regularly spaced bosses or hollows for slipless or nearly slipless meshing with complementary profiled contact surface of a pulley
    • 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
    • Y10T74/19633—Yieldability in gear trains

Definitions

  • the present invention relates generally to shock ab sorbing mechanisms and more particularly to a mechanism for absorbing the shock developedin a belt drive.
  • the present invention provides generally a shock absorbing drive mechanism which will preventbreakage in the timing belt drives.
  • the driven elements of the machine are divided into two groups: those in which no movement such as oscillation can be tolerated, and those in which some small oscillatory movement may be tolerated.
  • the driven elements of the machine in which no movement may be tolerated must be connected directly to the driver clutch shaft by a positive drive means, and the elements of the machine in which some small oscillatory movement may be tolerated are connected to the driver clutch shaft through the shock absorbing mechanism of the present invention.
  • the present invention comprises two spacedapart idler pulleys between which a timing belt is passed to operably connect a power clutch shaft to one or more load shafts.
  • the idler pulleys are yieldably maintained in a predetermined position by one or more suitable resilient means such as, for example, coil springs which allow the pulleys to shift to absorb starting and stopping shock tensions developed in the belt.
  • one of the objects of the present invention is to provide a mechanism for absorbing shock tensions developed in belt drives.
  • Another object of the present invention is to provide a means for controlling the tension in a belt drive.
  • the operating elements of a card feeding machine are illustrated as being divided into two groups: those elements 11 in which some movement or oscillation may be tolerated, and those elements 12 in which no movement or oscillation may be tolerated.
  • the card feeding mechanism 12 is selected to illustrate that portion of a card feeding machine which must stop instantly with the power clutch shaft and, therefore, is shown as being driven directly by means of a flexible belt 13 from a power clutch shaft 14. Therefore, from the direct connection of the card feeding mechanism 12 to the power clutch shaft 14 it may be seen that the card feeding mechanism 12 will stop at the instant that the power clutch shaft 14 stops.
  • the feed rollers 21, 22 and 23 are illustrated as the elements 11 of the card feeding machine in which some movement or oscillation may be tolerated.
  • a flexible belt 24 with teeth 25 connects the two feed rollers 21 and 22 with the power clutch shaft 14.
  • the connection of two feed rollers 21 and 22 is shown for illustration purposes only. Obviously the flexible belt 24 may connect only one feed roller with the power clutch shaft 14, or it may connect a plurality of feed rollers to the power clutch shaft. Therefore, for descriptive purposes only, this invention will be described. in connection with the two feed rollers 21 and 22.
  • a flexible belt 24 with teeth 25 drives the two feed rollers 21 and 22 from a power clutch shaft 14.
  • the flexible belt 24 is shown in operable relationship with gears 27 and 28 which are secured to the shafts 18 and 19, respectively, as are the feed rollers 21 and 22, respectively.
  • the flexible belt 24 passes between two idler pulleys 31 and 32 which keepthe belt 24 taut during operation.
  • a gear 33 which is mounted on the power clutch shaft 14 drives the flexible belt 24 to rotate the feed rollers 21 and 22.
  • the two idler pulleys 31 and 32 are mounted on an elongated arm 34 which is wedge-shaped, as shown in the drawing.
  • the point 36 of the wedge is pivoted about an axis 37 on the base (not shown) of the machine.
  • an integral extended portion 38 is formed at the opposite end of the elongated arm .34.
  • the rod 41 may be threaded into a base portion 42 of the machine, or it may be mounted on the base 42 by any suitable means, as for example, by a nut 43 threaded on the end 44 of the rod 41.
  • a first spring 46 mounted about the rod 41 bears against the base portion 42 at one end 47 and at the opposite end 48 against one side of the extended portion 38.
  • a second spring 50 which is similar to spring 46, bears at the end 53 against a nut 49 threaded onto the end 51 of rod 41 and at the end 52 against the opposite side of the extended portion 38 from the spring 46.
  • the two springs 46 and 50 may be replaced by a single spring which may bear against the base portion 42 at one end 47 and against the nut 49 at the end 53 with the extended portion 38 being secured to the spring at a point approximately midway between ends 47 and 48.
  • Another gear 55 may be mounted so that the movement of the two feed rollers 21 and 22 will cause movement in a further feed roller 23 in the machine.
  • Additional rollers 56, 57 and 58 may be mounted to bear against the feed rollers 21, 22 and 23, respectively, in order to keep cards fed into the machine in close contact with the feed rollers.
  • the power clutch shaft 14 with the power gear 33 mounted thereon starts by turning, for example, in a clockwise direction.
  • the feed rollers 21 and 22 resist this turning due to their inertia and, therefore, excessive tension would be developed in the flexible belt 24.
  • the elongated arm 34 will pivot about a pivot point 37 in a clockwise direction due to the pull by the flexible belt 24 against the idler pulley 31 and the extended portion 38 will compress spring 50 to absorb the initial tension developed in the flexible belt 24.
  • the elongated member 34 will move back toward its initial position which position is illustrated in the drawing and will oscillate thereabout (approximately two oscillations of significant magnitude) until it finally comes to rest.
  • the flexible belt 24 is kept taut during this cycle due to the relationship of the two idler pulleys 31 and 32.
  • the power clutch shaft 14 stops in an instant.
  • the feed rollers 21 a'nd22 will "*have a tendency to continue to rotate due to their inertia.
  • the elongated arm 34 will then be pulled -in--a counterclockwise direction against spring 46 to absorb the tension developed in the flexible belt 24.
  • the feed rollers '21 and '22 come to lrest, they will rotate in the opposite direction'and oscillate as the elongated arm 34 seeks its rest position.
  • the shock whichordinarily would belabsorbed in the flexible belt 24, will new be absorbed in the springs 46 and 50 and belt breakage -from this cause will be avoided.
  • the present invention provides a shock absorbing drive mechanism which will absorb iboth starting and stopping shock on that part of the load which can tolerate oscillation, and 'at the same time provide a home position, due to the spring arrangement, which allows a positive :timing relationship between the drive and the card displacement.
  • a shock absorbingdrive mechanism for driving at least one load shaft comprising :apow'er shaft, an elongated idler armrotatably mounted atone end, two spacedapart idler pulleys mounted adjacent each other on said idler arm ata distance from said rotatably mounted-end, flexible belt means mounted about said power shaft and said load shaft and passing between and engaging said two idler pulleys, an'extendedportion on said idler attached to the end near .said idler pulleys, ⁇ and a spring means connected to said extended portion to resiliently resist movement of theidler arm fromapredetermined posi tion.
  • a shock absorbing drive mechanism for driving a plurality of load shafts comprising a power shaft, a wedgeshaped idler arm rotatably mounted at one end, two spaced-apart idler pulleys mounted adjacent each other on said idler ,arm at ;-a distance from said rotatably mounted end, flexible belt means mountedjabout said power shaft and ⁇ said plurality of load shafts "and passing between and engaging said two iidle'r pulleys, an extended portion on said- 'idler arin attached to the end near said idler pulleys and “having "an”aperture'therethrough, rod means extending through said aperture in asaidextendcd portion, and spring means about said rod means bearing against each side of said extended portion to resiliently resist movement thereof.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Description

Aug. 25, 1959 L. A. WILSON ETAL 2,900,331
SHOCK ABSORBING MECHANISM Filed Nov. 15, 1956 ENTORS LAWRE A.W|LSON BENJAMIN M. DURFEE HARRY J. TASHJIAN THEIR ATTORNEYS United States Patent SHOCK ABSORBING MECHANISM Lawrence A. Wilson, Apalachin, Benjamin M. Durfee, Binghamton, and Harry J. Tashjian, Endwell, N.Y., assignors to International Business Machines Corporation, New York, N.Y., a corporation of New York Application November 15, 1956, Serial No. 622,421
2 Claims. (Cl. 74-2165) The present invention relates generally to shock ab sorbing mechanisms and more particularly to a mechanism for absorbing the shock developedin a belt drive.
In machines such as, for example, IBM card feeding machines, high starting and stopping torques cause breakage in the timing belts which connect the various operating parts. Therefore, for convenience, the present invention will be described in connection with an IBM card feeding machine, it being understood that the invention is not limited thereto.'
The present invention provides generally a shock absorbing drive mechanism which will preventbreakage in the timing belt drives. The driven elements of the machine are divided into two groups: those in which no movement such as oscillation can be tolerated, and those in which some small oscillatory movement may be tolerated.
Accordingly, the driven elements of the machine in which no movement may be tolerated must be connected directly to the driver clutch shaft by a positive drive means, and the elements of the machine in which some small oscillatory movement may be tolerated are connected to the driver clutch shaft through the shock absorbing mechanism of the present invention.
Generally, the present invention comprises two spacedapart idler pulleys between which a timing belt is passed to operably connect a power clutch shaft to one or more load shafts. The idler pulleys are yieldably maintained in a predetermined position by one or more suitable resilient means such as, for example, coil springs which allow the pulleys to shift to absorb starting and stopping shock tensions developed in the belt.
Therefore, one of the objects of the present invention is to provide a mechanism for absorbing shock tensions developed in belt drives.
Another object of the present invention is to provide a means for controlling the tension in a belt drive.
The invention further resides in certain novel features of parts and further objects and advantages therein will become apparent to those skilled in the art to which it pertains from the following description of the present preferred embodiment thereof described with respect to the accompanying drawing in which the single figure illustrates the preferred embodiment of the present invention.
Referring now to the single figure in the drawing, the operating elements of a card feeding machine are illustrated as being divided into two groups: those elements 11 in which some movement or oscillation may be tolerated, and those elements 12 in which no movement or oscillation may be tolerated. The card feeding mechanism 12 is selected to illustrate that portion of a card feeding machine which must stop instantly with the power clutch shaft and, therefore, is shown as being driven directly by means of a flexible belt 13 from a power clutch shaft 14. Therefore, from the direct connection of the card feeding mechanism 12 to the power clutch shaft 14 it may be seen that the card feeding mechanism 12 will stop at the instant that the power clutch shaft 14 stops.
ice
The feed rollers 21, 22 and 23 are illustrated as the elements 11 of the card feeding machine in which some movement or oscillation may be tolerated. A flexible belt 24 with teeth 25 connects the two feed rollers 21 and 22 with the power clutch shaft 14. The connection of two feed rollers 21 and 22 is shown for illustration purposes only. Obviously the flexible belt 24 may connect only one feed roller with the power clutch shaft 14, or it may connect a plurality of feed rollers to the power clutch shaft. Therefore, for descriptive purposes only, this invention will be described. in connection with the two feed rollers 21 and 22.
A flexible belt 24 with teeth 25 drives the two feed rollers 21 and 22 from a power clutch shaft 14. The flexible belt 24 is shown in operable relationship with gears 27 and 28 which are secured to the shafts 18 and 19, respectively, as are the feed rollers 21 and 22, respectively. The flexible belt 24 passes between two idler pulleys 31 and 32 which keepthe belt 24 taut during operation. A gear 33 which is mounted on the power clutch shaft 14 drives the flexible belt 24 to rotate the feed rollers 21 and 22.
a The two idler pulleys 31 and 32 are mounted on an elongated arm 34 which is wedge-shaped, as shown in the drawing. The point 36 of the wedge is pivoted about an axis 37 on the base (not shown) of the machine. At the opposite end of the elongated arm .34 an integral extended portion 38 is formed.
An aperture 39 located in the extended portion 38 al lows a rod 41 to be extended therethrough. The rod 41 may be threaded into a base portion 42 of the machine, or it may be mounted on the base 42 by any suitable means, as for example, by a nut 43 threaded on the end 44 of the rod 41.
A first spring 46 mounted about the rod 41 bears against the base portion 42 at one end 47 and at the opposite end 48 against one side of the extended portion 38. A second spring 50, which is similar to spring 46, bears at the end 53 against a nut 49 threaded onto the end 51 of rod 41 and at the end 52 against the opposite side of the extended portion 38 from the spring 46. Obviously, however, the two springs 46 and 50 may be replaced by a single spring which may bear against the base portion 42 at one end 47 and against the nut 49 at the end 53 with the extended portion 38 being secured to the spring at a point approximately midway between ends 47 and 48.
Another gear 55 may be mounted so that the movement of the two feed rollers 21 and 22 will cause movement in a further feed roller 23 in the machine. Additional rollers 56, 57 and 58 may be mounted to bear against the feed rollers 21, 22 and 23, respectively, in order to keep cards fed into the machine in close contact with the feed rollers.
In operation, the power clutch shaft 14 with the power gear 33 mounted thereon starts by turning, for example, in a clockwise direction. The feed rollers 21 and 22 resist this turning due to their inertia and, therefore, excessive tension would be developed in the flexible belt 24. However, the elongated arm 34 will pivot about a pivot point 37 in a clockwise direction due to the pull by the flexible belt 24 against the idler pulley 31 and the extended portion 38 will compress spring 50 to absorb the initial tension developed in the flexible belt 24. After the machine has started, the elongated member 34 will move back toward its initial position which position is illustrated in the drawing and will oscillate thereabout (approximately two oscillations of significant magnitude) until it finally comes to rest. The flexible belt 24 is kept taut during this cycle due to the relationship of the two idler pulleys 31 and 32.
In stopping the machine, the power clutch shaft 14 stops in an instant. However, the feed rollers 21 a'nd22 will "*have a tendency to continue to rotate due to their inertia. The elongated arm 34 will then be pulled -in--a counterclockwise direction against spring 46 to absorb the tension developed in the flexible belt 24. After the feed rollers '21 and '22 come to lrest, they will rotate in the opposite direction'and oscillate as the elongated arm 34 seeks its rest position. Thus, the shock, whichordinarily would belabsorbed in the flexible belt 24, will new be absorbed in the springs 46 and 50 and belt breakage -from this cause will be avoided. a
It may be readily seen that the present invention provides a shock absorbing drive mechanism which will absorb iboth starting and stopping shock on that part of the load which can tolerate oscillation, and 'at the same time provide a home position, due to the spring arrangement, which allows a positive :timing relationship between the drive and the card displacement.
"It will be understood that the embodiinent herein described is merely illustrative of the invention and orieapplication thereof, and that modifications can be :made and it is capable of other applications.
We claim:
1. A shock absorbingdrive mechanism for driving at least one load shaft comprising :apow'er shaft, an elongated idler armrotatably mounted atone end, two spacedapart idler pulleys mounted adjacent each other on said idler arm ata distance from said rotatably mounted-end, flexible belt means mounted about said power shaft and said load shaft and passing between and engaging said two idler pulleys, an'extendedportion on said idler attached to the end near .said idler pulleys, {and a spring means connected to said extended portion to resiliently resist movement of theidler arm fromapredetermined posi tion.
2. A shock absorbing drive mechanism for driving a plurality of load shafts comprising a power shaft, a wedgeshaped idler arm rotatably mounted at one end, two spaced-apart idler pulleys mounted adjacent each other on said idler ,arm at ;-a distance from said rotatably mounted end, flexible belt means mountedjabout said power shaft and {said plurality of load shafts "and passing between and engaging said two iidle'r pulleys, an extended portion on said- 'idler arin attached to the end near said idler pulleys and "having "an"aperture'therethrough, rod means extending through said aperture in asaidextendcd portion, and spring means about said rod means bearing against each side of said extended portion to resiliently resist movement thereof.
' Refiene's Gitedfin the fil'eof'tliis patent- UNITED STATES rATENTs 5253118 Riker Atig.'28,1894 1,848,423 Jackson Y I Mar. 8, 1932 1,871268 "Hildebrand r Aug. 9, 193 2 ass-3,248 Graham May 1-5, 19 51 lg-639523 AitSli'GF-Hitih "M'ay'26, 195-3 FOREIGN PATENTS 101,500 Great Britain m *5, 1917
US622421A 1956-11-15 1956-11-15 Shock absorbing mechanism Expired - Lifetime US2900831A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178047A (en) * 1962-10-12 1965-04-13 Nat Castings Co Pipe conveying device
US3182525A (en) * 1962-03-28 1965-05-11 Dura Corp Power actuator with harmonic drive
US3473399A (en) * 1968-09-13 1969-10-21 Gen Motors Corp Belt drive and tensioning means
US4180962A (en) * 1977-04-06 1980-01-01 Reliance Electric Company Wrapping apparatus
US4564098A (en) * 1979-06-21 1986-01-14 Hormann Kg Drive assembly for door operator
US4957470A (en) * 1988-08-08 1990-09-18 Yamaha Hatsudoki Kabushiki Kaisha Valve operating system for engine
US5221236A (en) * 1990-07-10 1993-06-22 Raymer Matthew C Belt tensioning device for belt driven bicycle
US20050272543A1 (en) * 2004-05-26 2005-12-08 Alfred Seeber Apparatus for the intermittent drive of a spindle for a workpiece fixture, especially a forging machine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US525118A (en) * 1894-08-28 Andrew l
GB107500A (en) * 1916-10-10 1917-07-05 John Francis Crowley Improvements in or relating to Anti-vibration Arrangements for Tension Devices for Driving Belts.
US1848423A (en) * 1931-04-30 1932-03-08 H & B American Machine Co Reversible spindle drive for spinning and twisting frames
US1871268A (en) * 1930-11-03 1932-08-09 Hildebrand Reinhard Lead control for diesel engines
US2553248A (en) * 1945-06-20 1951-05-15 Jack & Heintz Prec Ind Inc Centering means for restraining devices
FR983330A (en) * 1948-03-20 1951-06-21 Philips Nv Device comprising an endless conveyor belt, in particular for phototelegraphy
US2639623A (en) * 1950-03-29 1953-05-26 Harry S Ausherman Belt tightener and slack adjuster

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US525118A (en) * 1894-08-28 Andrew l
GB107500A (en) * 1916-10-10 1917-07-05 John Francis Crowley Improvements in or relating to Anti-vibration Arrangements for Tension Devices for Driving Belts.
US1871268A (en) * 1930-11-03 1932-08-09 Hildebrand Reinhard Lead control for diesel engines
US1848423A (en) * 1931-04-30 1932-03-08 H & B American Machine Co Reversible spindle drive for spinning and twisting frames
US2553248A (en) * 1945-06-20 1951-05-15 Jack & Heintz Prec Ind Inc Centering means for restraining devices
FR983330A (en) * 1948-03-20 1951-06-21 Philips Nv Device comprising an endless conveyor belt, in particular for phototelegraphy
US2639623A (en) * 1950-03-29 1953-05-26 Harry S Ausherman Belt tightener and slack adjuster

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182525A (en) * 1962-03-28 1965-05-11 Dura Corp Power actuator with harmonic drive
US3178047A (en) * 1962-10-12 1965-04-13 Nat Castings Co Pipe conveying device
US3473399A (en) * 1968-09-13 1969-10-21 Gen Motors Corp Belt drive and tensioning means
US4180962A (en) * 1977-04-06 1980-01-01 Reliance Electric Company Wrapping apparatus
US4564098A (en) * 1979-06-21 1986-01-14 Hormann Kg Drive assembly for door operator
US4957470A (en) * 1988-08-08 1990-09-18 Yamaha Hatsudoki Kabushiki Kaisha Valve operating system for engine
US5221236A (en) * 1990-07-10 1993-06-22 Raymer Matthew C Belt tensioning device for belt driven bicycle
US20050272543A1 (en) * 2004-05-26 2005-12-08 Alfred Seeber Apparatus for the intermittent drive of a spindle for a workpiece fixture, especially a forging machine
US7678001B2 (en) * 2004-05-26 2010-03-16 GFM Beteiligungs- und Management m.b.H. & Co. KG Apparatus for the intermittent drive of a spindle for a workpiece fixture, especially a forging machine

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