US3245277A - Chain tensioning device - Google Patents

Chain tensioning device Download PDF

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Publication number
US3245277A
US3245277A US355869A US35586964A US3245277A US 3245277 A US3245277 A US 3245277A US 355869 A US355869 A US 355869A US 35586964 A US35586964 A US 35586964A US 3245277 A US3245277 A US 3245277A
Authority
US
United States
Prior art keywords
arm
chain
slider bar
fixed arm
swinging arm
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 - Lifetime
Application number
US355869A
Other languages
English (en)
Inventor
Ward Harry
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AMF International Ltd
Original Assignee
AMF International Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AMF International Ltd filed Critical AMF International Ltd
Application granted granted Critical
Publication of US3245277A publication Critical patent/US3245277A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1254—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
    • F16H7/1281—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path
    • F16H7/129—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path with means for impeding reverse motion
    • 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
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0802—Actuators for final output members
    • F16H2007/0808—Extension coil springs
    • 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
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0802—Actuators for final output members
    • F16H2007/0821—Actuators for final output members working with gravity
    • 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
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
    • F16H2007/0853—Ratchets
    • 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
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0863—Finally actuated members, e.g. constructional details thereof
    • F16H2007/0874—Two or more finally actuated members
    • 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
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0876—Control or adjustment of actuators
    • F16H2007/088—Manual adjustment
    • 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
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0893—Circular path

Definitions

  • the fixed arm is also arranged with one end correspondingly higher than the other; the slider bar then runs up and down the fixed arm.
  • the biasing force acting on the slider bar may be due entirely to the weight of the slider bar or may be assisted by a spring or other means.
  • the two chain sprockets are one above the other, and the fixed arm is also vertical, so that one end of the slider bar runs up and down the fixed arm, and the slider bar is urged downwards by its own weight.
  • the slider bar may be biased in one direction by means of a spring.
  • FIGURE 1 shows a device in use for tensioning a chain running between two sprockets whose axes lie one above the other;
  • FIGURE 2 shows a diiferent device in use for tensioning a chain running between two sprockets whose axes lie in the same horizontal plane.
  • a chain has two runs between two sprockets, one of which is shown at 4, this sprocket 4 being pivoted about an axis 6.
  • the tensioning device comprises a fixed arm 8 mounted upon a pin 10 and a bracket indicated generally at 12, a swinging arm 14 pivoted about a pin 16 mounted upon a main bracket 18 which also mounts the pin 10 and the bracket 12, and a slider bar 20 which extends between the fixed arm 8 and the swinging arm 14.
  • the slider bar 20 comprises two bars one of which is shown at 22, these bars being spaced apart by spacer bolts 24 and 26 at each end.
  • the two bars of the slider bar pass outside both the fixed arm 8 and the swinging arm 14, so that the slider bar embraces both arms.
  • a block 32 mounted on the spacer bolt 26 and lying between the two bars of the slider bar 20 bears upon the outside edge 34 of the swinging arm 14, which outside edge 34 is suitably roughened.
  • a similar block bears on a roughened edge 35 of the fixed arm 8.
  • the weight of the slider bar 20 is transmitted to the swinging arm 14 so that a roller 36 at the lower end of the swinging arm 14 is biased inwards against the chain 2.
  • the existing tension in the chain acts in the direction of the arrow 38, and the weight of the slider bar 20 acting upon the swinging arm 14 causes the roller 36 to bear upon the chain 2 with a force in the direction of the arrow 40; an equilibrium position of the chain 2 is quickly attained.
  • the bracket 12. comprises a threaded rod 42 which passes through a bore in the main frame 18 and is locked in position by means of lock nuts 46 and 48.
  • the threaded rod 42 also passes through a bore 50 in the fixed arm 8, and a spring 52 acts between a side of the fixed arm 8 and a collar 54 which is mounted on the threaded rod 42 and locked in position by means of a nut 56.
  • Further lock nuts 58 and 60 determine the position along the threaded rod 42 at which the fixed arm 8 is mounted, and consequently the degree of compression. of the spring 52.
  • the tension may be released by lifting the slider bar and supporting it temporarily on a pin 28 which may be put in any one of a number of holes 30 spaced out along the length of the fixed arm 8.
  • FIGURE 2 shows a device similar to that shown in FIGURE 1, except that it is used for adjusting the ten sion in a chain running between two sprockets and 72 with axes lying in the same horizontal plane. Similar parts of the device are identified by the same numerals as used in FIGURE 1, but with the addition of a sufiix a.
  • the fixed arm 8a is mounted horizontally as shown.
  • a mounting bracket 74 extends from the main bracket 18a, and a spring 76 extends from the end of the bracket 74 to the centre of the slider bar 20a.
  • This spring 76 acts to bias the slider bar away from the pivotal axis 16a of the swinging arm 14a, and acts analogously to the gravitational force acting on the slider bar 20 in the arrangemnt shown in FIGURE 1.
  • the lower end of the swinging arm 14 is arranged to engage against the inside of a run of the chain, in order to urge that run of the chain outwards.
  • Such an arrangement is particularly desirable if the chain sprockets are spaced apart by a distance which is large compared with their diameters, as there is then no possibility of the runs of the chain touching if the chain becomes very slack.
  • the spacer bolt 26 runs within a slot cut along the length of the swinging arm 14, and bears against a side of this slot in order to bias the swinging arm in the required direction.
  • a chain In use, a chain will become progressively more slack, as its over-all length increases.
  • the slider bar 20 will slide down the swinging arm 14 as the 3 length of the chain increases, and the roller 36 will be moved so as to move the chain in order to take up any extra slackness in it.
  • a device for adjusting the tension in a chain running between two rotary members comprising an arm fixed in relation to the axes of the rotary members and lying substantially parallel to the line joining the axes of the rotary members, a swinging arm lying in the same plane as the fixed arm and pivotal about an axis transverse to the fixed arm so that one end may swing either towards or away from the fixed arm and constrained by a run of the chain in one direction of swing, and a slider bar extending between the fixed arm and the swinging arm and being biased away from the pivotal axis of the swinging arm in a direction generally parallel to the fixed arm, said slider bar including an end portion cooperating with the fixed arm so that it may slide along it, and an opposite end portion co-operating with the swinging arm so that it may slide along it, whereby the biasing force acting on the slider bar is transmitted to the swinging arm so that the swinging arm is constrained to bear against the run of the chain.
  • a device in which the fixed arm has one end higher than the other, and the slider bar is biased away from the pivotal axis of the swinging arm by its own weight.
  • a device in which the slider bar is biased in one direction by means of a spring.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
US355869A 1963-04-05 1964-03-30 Chain tensioning device Expired - Lifetime US3245277A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB13705/63A GB1079685A (en) 1963-04-05 1963-04-05 Improvements relating to a chain tensioning device

Publications (1)

Publication Number Publication Date
US3245277A true US3245277A (en) 1966-04-12

Family

ID=10027889

Family Applications (1)

Application Number Title Priority Date Filing Date
US355869A Expired - Lifetime US3245277A (en) 1963-04-05 1964-03-30 Chain tensioning device

Country Status (3)

Country Link
US (1) US3245277A (de)
DE (1) DE1450762A1 (de)
GB (1) GB1079685A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1750685C3 (de) * 1968-05-25 1973-06-28 Borg Warner Ltd Kettenspanner
US4273036A (en) * 1978-06-09 1981-06-16 Kopaska Arnold F Machine for rolling crops into round bales
WO2007124241A1 (en) * 2006-04-20 2007-11-01 Borgwarner Inc Ratchet mechanism for a chain drive
US20140051534A1 (en) * 2012-08-16 2014-02-20 Sheldon Wiebe Belt Tensioner for a Pump Jack
US20150045164A1 (en) * 2013-08-06 2015-02-12 Tsubakimoto Chain Co. Chain guide mechanism
US11499607B2 (en) * 2019-04-25 2022-11-15 Johnson Controls Tyco IP Holdings LLP Drive belt tensioner systems and methods
CN116643083A (zh) * 2023-05-30 2023-08-25 山东双海电气设备安装有限公司 一种智能节电监测装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121475A (en) * 1977-07-21 1978-10-24 Sperry Rand Corporation Tension control device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1379055A (en) * 1920-12-31 1921-05-24 Eugene G Smith Axle transmission for railway-cars
US2066721A (en) * 1935-05-22 1937-01-05 Jarecki Mfg Company Belt tightening means
US2110439A (en) * 1937-04-09 1938-03-08 Gordon Abe Tension adjusting device for sewing machine belts
US2663195A (en) * 1950-06-20 1953-12-22 Eaton Mfg Co Belt tensioner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1379055A (en) * 1920-12-31 1921-05-24 Eugene G Smith Axle transmission for railway-cars
US2066721A (en) * 1935-05-22 1937-01-05 Jarecki Mfg Company Belt tightening means
US2110439A (en) * 1937-04-09 1938-03-08 Gordon Abe Tension adjusting device for sewing machine belts
US2663195A (en) * 1950-06-20 1953-12-22 Eaton Mfg Co Belt tensioner

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1750685C3 (de) * 1968-05-25 1973-06-28 Borg Warner Ltd Kettenspanner
US4273036A (en) * 1978-06-09 1981-06-16 Kopaska Arnold F Machine for rolling crops into round bales
WO2007124241A1 (en) * 2006-04-20 2007-11-01 Borgwarner Inc Ratchet mechanism for a chain drive
US20090275431A1 (en) * 2006-04-20 2009-11-05 Borgwarner Inc. Ratchet mechanism for a chain drive
US8066600B2 (en) 2006-04-20 2011-11-29 Borgwarner Inc. Ratchet mechanism for a chain drive
US20140051534A1 (en) * 2012-08-16 2014-02-20 Sheldon Wiebe Belt Tensioner for a Pump Jack
US20150045164A1 (en) * 2013-08-06 2015-02-12 Tsubakimoto Chain Co. Chain guide mechanism
US9651121B2 (en) * 2013-08-06 2017-05-16 Tsubakimoto Chain Co. Chain guide mechanism
US11499607B2 (en) * 2019-04-25 2022-11-15 Johnson Controls Tyco IP Holdings LLP Drive belt tensioner systems and methods
CN116643083A (zh) * 2023-05-30 2023-08-25 山东双海电气设备安装有限公司 一种智能节电监测装置
CN116643083B (zh) * 2023-05-30 2023-12-08 林后富 一种智能节电监测装置

Also Published As

Publication number Publication date
GB1079685A (en) 1967-08-16
DE1450762A1 (de) 1969-03-27

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