GB2181210A - Belt or chain tensioning device - Google Patents

Belt or chain tensioning device Download PDF

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Publication number
GB2181210A
GB2181210A GB08524627A GB8524627A GB2181210A GB 2181210 A GB2181210 A GB 2181210A GB 08524627 A GB08524627 A GB 08524627A GB 8524627 A GB8524627 A GB 8524627A GB 2181210 A GB2181210 A GB 2181210A
Authority
GB
United Kingdom
Prior art keywords
tensor
bedplate
spring
pawl
improved
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.)
Granted
Application number
GB08524627A
Other versions
GB2181210B (en
GB8524627D0 (en
Inventor
Elorza D Luis Ma Cendoya
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.)
CADENAS IRIS SA
Original Assignee
CADENAS IRIS SA
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 CADENAS IRIS SA filed Critical CADENAS IRIS SA
Publication of GB8524627D0 publication Critical patent/GB8524627D0/en
Publication of GB2181210A publication Critical patent/GB2181210A/en
Application granted granted Critical
Publication of GB2181210B publication Critical patent/GB2181210B/en
Expired 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
    • F16H7/0848—Means for varying tension of belts, ropes, or chains 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
    • F16H2007/0806—Compression 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
    • 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
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0891—Linear path

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Clamps And Clips (AREA)

Abstract

A belt or chain tensioner comprises a housing having a main body portion (1) within which a carrier (21) provided with a tensioner head (20) is longitudinally slidable, and a bracket portion terminating in an upper flange (11) for mounting purposes. A cooperating key and keyway arrangement is provided to prevent rotation of the carrier (21) within the housing body (1). A spring 5 urges the carrier (4) outwardly and a locking pawl (4) engaging teeth (211) on the carrier (21) permits carrier movement in one direction only. <IMAGE>

Description

SPECIFICATION An improved tensor for chains, drive belts and the like Tensors at present known possess the following dis advantages: a) Theyfail to provide continuous and even tight- ening; b) Their scope for varying the attachment position (vertical, horizontal or at an angle) is limited; c) an excessively large number of components is required in their construction; d) rotation between the tensor body and the bed plate or frame can not be prevented without restrict ing axial movement; and others described hereinafter and which are overcome by this invention.
Figure 7 is an elevational view of an improved tensor for chains, drive belts a nd the like i n accord- ance with this invention, showing all its components and features.
Two partial sections are shown in this figure, of which the upper depicts the construction of the head (20) and the lower depicts the fittings for attachment ofthetensor body (2) uponthe bedplate (1) andself- travelling spring (5).
Figure2 is a side view upon the above figure.
Figure 3 is a plan viewfrom the section shown in Figure 1.
In this figure, the chain body (2) has been omitted forthe sake of improved clarity, and the spring (5), which comprises the means for self-travel, is not shown either.
Figure 4 is a plan view of the tensor body (2) across the section shown in Figure 1.
Spring (5) has been omitted from thisfiguretoofor the sake of improved clarity.
The improved tensorfor chains, drive belts and the like covered by this invention is made up from the following essential parts: -a bedplate(1) - a tensor body (2) - a self-travelling spring (5) -a non-return pawl (4) The bedplate (1 ) is comprised as a single componentwhich possessestwo areas at angles to one another, of which one is a main portion (1), and the other is an elbowed bracket.
Said elbowed bracket terminates in a top flange (11) possessing threaded holes (111). This top flanges is set at right angles orsubstantially at right angiesto its elbowed bracket, and atan angletothemain portion so that the assembly can be attached vertically, horizontallyorslopinglytoafixed point.
The main portion possessesahollow(12),whichis either closed or provided with a small throughgoing bore, to house the self-travelling spring which is guided by body (21)ofthetensor(2).
Said tensor (2) is comprised of a main body (21) and a head (20). Main body (21) possesses an internal hollow (22), and on the outside it possesses a set of unidirectional teeth (211). Head (20) is comprised of two parts, of which one (20 a) is metallicforthe base, and the other (20b) is made of rubber and is located upon the former. Said rubber head (20b) serves as the body upon which the chain, drive beltorthe like to be tightened rides and rubs, and itcan be readilyrepla ced in the event ofwear.
Pawl (4) is shaped like an upturned "L", whose arms (4a) and (4b) lie upon the main portion (1), and it is located on same by means of a screw (3). It is allowed a certain amount of play by a spring (6) which lies against the body (31) of screw (3) and abuts with the head (30) of same and the pawl (4).
Pawl (4) is finally positioned upon body (1) by meansofthetipofitsvertical arm (4b) being inserted into a location slot (14) provided for this purpose of said body (1), this slot being formed between the body (1) and flange (13) incorporated therein.
Arm (4a) has a uni-directional bevel (41) upon one of its tips, which engages with uni-directional teeth (211 ),which are arranged to allowthe body to travel freely in one direction,that isto say, upwards as viewed in the figures, and to prevent it from travel ling in the opposite direction.
In order to prevent any rotation between tensor body (2) and bedplate (1), a key (23) and keyway (121) are provided, and in the construction as illustrated, keyway (121) is formed in the innerwall of hollow (12),while key (23) is embodied into the wall of main body (21), but without altering the essential features of the invention at all, they may equally well bearran- ged the opposite way about.
With this construction as described, operation takes place as follows: (a) the assembly is secured to a fixed point by means of the top flange (11). Tensor head (20) lies in the horizontal vertical or sloping position with respectto its fixed support (not shown).
(b) the chain or drive belt is tightened steplessly, since spring (5) thrusts tensor body (2), and in the event of wear from use of the rubber head (20b), pawl (4) allows itto rise by releasing slope (41) from its arm (4a) and the uni-directional teeth (211) on the main body (21). In the opposite direction, pawl (4) prevents body (2) from moving downwards, whereupon the chain or drive belt is kept tight; (c) body (2) is prevented from rotating about body (1) by the key (23) and key-way (121) arrangement.
1. An improvedtensorforchains,drivebeltsand the like peculiar inasmuch that it is comprised of a bedplate in a single part which defines two areas lying at an angle to one another, one being a main portion andtheotheran elbowed bracketwith respectthereto, inasmuch that said elbowed bracket terminates in a top flange for attaching the assembly horizontally, vertically of slopingly to a fixed point, and inasmuch that the main portion possesses arran gements for the attachment of a tensor body as such with means for preventing rotation of itself a bout the bedplate, and means for uni-directional selftravel againstthe pull ofthechain or drive beltto betightened in such awaythatsameis kepttightevenlyand steplessly.
2. An improved tensorfor chains, drive belts and the like in full accordance with the preceding chain,
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION An improved tensor for chains, drive belts and the like Tensors at present known possess the following dis advantages: a) Theyfail to provide continuous and even tight- ening; b) Their scope for varying the attachment position (vertical, horizontal or at an angle) is limited; c) an excessively large number of components is required in their construction; d) rotation between the tensor body and the bed plate or frame can not be prevented without restrict ing axial movement; and others described hereinafter and which are overcome by this invention. Figure 7 is an elevational view of an improved tensor for chains, drive belts a nd the like i n accord- ance with this invention, showing all its components and features. Two partial sections are shown in this figure, of which the upper depicts the construction of the head (20) and the lower depicts the fittings for attachment ofthetensor body (2) uponthe bedplate (1) andself- travelling spring (5). Figure2 is a side view upon the above figure. Figure 3 is a plan viewfrom the section shown in Figure 1. In this figure, the chain body (2) has been omitted forthe sake of improved clarity, and the spring (5), which comprises the means for self-travel, is not shown either. Figure 4 is a plan view of the tensor body (2) across the section shown in Figure 1. Spring (5) has been omitted from thisfiguretoofor the sake of improved clarity. The improved tensorfor chains, drive belts and the like covered by this invention is made up from the following essential parts: -a bedplate(1) - a tensor body (2) - a self-travelling spring (5) -a non-return pawl (4) The bedplate (1 ) is comprised as a single componentwhich possessestwo areas at angles to one another, of which one is a main portion (1), and the other is an elbowed bracket. Said elbowed bracket terminates in a top flange (11) possessing threaded holes (111). This top flanges is set at right angles orsubstantially at right angiesto its elbowed bracket, and atan angletothemain portion so that the assembly can be attached vertically, horizontallyorslopinglytoafixed point. The main portion possessesahollow(12),whichis either closed or provided with a small throughgoing bore, to house the self-travelling spring which is guided by body (21)ofthetensor(2). Said tensor (2) is comprised of a main body (21) and a head (20). Main body (21) possesses an internal hollow (22), and on the outside it possesses a set of unidirectional teeth (211). Head (20) is comprised of two parts, of which one (20 a) is metallicforthe base, and the other (20b) is made of rubber and is located upon the former. Said rubber head (20b) serves as the body upon which the chain, drive beltorthe like to be tightened rides and rubs, and itcan be readilyrepla ced in the event ofwear. Pawl (4) is shaped like an upturned "L", whose arms (4a) and (4b) lie upon the main portion (1), and it is located on same by means of a screw (3). It is allowed a certain amount of play by a spring (6) which lies against the body (31) of screw (3) and abuts with the head (30) of same and the pawl (4). Pawl (4) is finally positioned upon body (1) by meansofthetipofitsvertical arm (4b) being inserted into a location slot (14) provided for this purpose of said body (1), this slot being formed between the body (1) and flange (13) incorporated therein. Arm (4a) has a uni-directional bevel (41) upon one of its tips, which engages with uni-directional teeth (211 ),which are arranged to allowthe body to travel freely in one direction,that isto say, upwards as viewed in the figures, and to prevent it from travel ling in the opposite direction. In order to prevent any rotation between tensor body (2) and bedplate (1), a key (23) and keyway (121) are provided, and in the construction as illustrated, keyway (121) is formed in the innerwall of hollow (12),while key (23) is embodied into the wall of main body (21), but without altering the essential features of the invention at all, they may equally well bearran- ged the opposite way about. With this construction as described, operation takes place as follows: (a) the assembly is secured to a fixed point by means of the top flange (11). Tensor head (20) lies in the horizontal vertical or sloping position with respectto its fixed support (not shown). (b) the chain or drive belt is tightened steplessly, since spring (5) thrusts tensor body (2), and in the event of wear from use of the rubber head (20b), pawl (4) allows itto rise by releasing slope (41) from its arm (4a) and the uni-directional teeth (211) on the main body (21). In the opposite direction, pawl (4) prevents body (2) from moving downwards, whereupon the chain or drive belt is kept tight; (c) body (2) is prevented from rotating about body (1) by the key (23) and key-way (121) arrangement. CLAIMS
1. An improvedtensorforchains,drivebeltsand the like peculiar inasmuch that it is comprised of a bedplate in a single part which defines two areas lying at an angle to one another, one being a main portion andtheotheran elbowed bracketwith respectthereto, inasmuch that said elbowed bracket terminates in a top flange for attaching the assembly horizontally, vertically of slopingly to a fixed point, and inasmuch that the main portion possesses arran gements for the attachment of a tensor body as such with means for preventing rotation of itself a bout the bedplate, and means for uni-directional selftravel againstthe pull ofthechain or drive beltto betightened in such awaythatsameis kepttightevenlyand steplessly.
2. An improved tensorfor chains, drive belts and the like in full accordance with the preceding chain, and peculiarwherewith said arrangements for the attachment of a tensor bodyto the bedplate is a hollow that is either closed or provided with a small throughgoing bore, and wherewith said means for preventing rotation are comprised of a key and keyway of which the former is on the tensor body and the latter in the inside wall of the enclosed hollow in the bedplate orvice-versa, so asto preventthetensor body from revolving about the bedplate without jeopardizing its freedom of axial travel.
3. An improved tensorfor chains, drive belts and the like in full accordance with the preceding claims and peculiar insofar as the means for self-travel are comprised of a spring that is housed inside the enclosed hollow and abuts with the bottom wall of same and with the tensor body, a uni-directional pawl attached to the bedplate and allowed to rock through a limited angle, and a plurality of unidirectional teeth upon the tensor body, all arranged in such a manner that said body th rusts againstthe chain or drive belt to betightened due to the action of a spring in onedirection,whilsttheuni-directional pawl prevents any accidental return in the opposite direction.
4. An improved tensor for chains, drive belts and the like substantially as herein described.
GB8524627A 1985-10-08 1985-10-05 An improved tensor for chains, drive belts and the like Expired GB2181210B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853535915 DE3535915A1 (en) 1985-10-08 1985-10-08 TENSIONER FOR CHAINS, BELTS AND THE LIKE

Publications (3)

Publication Number Publication Date
GB8524627D0 GB8524627D0 (en) 1985-11-06
GB2181210A true GB2181210A (en) 1987-04-15
GB2181210B GB2181210B (en) 1989-09-13

Family

ID=6283077

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8524627A Expired GB2181210B (en) 1985-10-08 1985-10-05 An improved tensor for chains, drive belts and the like

Country Status (3)

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DE (1) DE3535915A1 (en)
FR (1) FR2588346A1 (en)
GB (1) GB2181210B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6454672B2 (en) * 2000-01-21 2002-09-24 Tsubakimoto Chain Co. Ratchet tensioner with mechanism for locking and releasing a plunger
US7691017B2 (en) 2004-04-23 2010-04-06 Borgwarner Morse Tec Japan K.K. Hydraulic tensioner

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5720683A (en) * 1996-10-21 1998-02-24 Borg-Warner Automotive,Inc. Mechanical chain tensioner with belleville springs

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB696586A (en) * 1950-09-26 1953-09-02 George Mattey Baigent Improvements in or relating to spring-tensioned jockey pulleys or sprockets
GB1091320A (en) * 1966-10-26 1967-11-15 Wippermann Jr Gmbh Fa Improvements in or relating to tensioning devices for chains,belts or the like
GB1279526A (en) * 1969-09-15 1972-06-28 Gerhard Winklhofer Tensioning device for power transmitting elements
GB1285528A (en) * 1970-06-16 1972-08-16 Tsubakimoto Chain Co Improvements in tensioning devices for endless flexible drive members
GB1387094A (en) * 1972-05-17 1975-03-12 Yamakyu Chain Kk Tensioning device for flexible members
EP0106325A1 (en) * 1982-10-15 1984-04-25 Joh. Winklhofer &amp; Söhne Tensioner for chain drive

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE958070C (en) * 1952-11-12 1957-02-14 Daimler Benz Ag Chain tensioner
DE1212383B (en) * 1963-02-14 1966-03-10 Wippermann Jr G M B H Toothed lock for a chain tensioner
DE6610777U (en) * 1967-08-18 1976-03-18 Winkelhofer & Soehne Joh CHAIN TENSIONER.
DE1650917A1 (en) * 1967-12-13 1970-12-03 Winkelhofer & Soehne Joh Toothed lock for a chain tensioner
DE3506770A1 (en) * 1985-02-26 1986-08-28 Joh. Winklhofer & Söhne Präzisionskettenwerk, 8000 München Chain tensioner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB696586A (en) * 1950-09-26 1953-09-02 George Mattey Baigent Improvements in or relating to spring-tensioned jockey pulleys or sprockets
GB1091320A (en) * 1966-10-26 1967-11-15 Wippermann Jr Gmbh Fa Improvements in or relating to tensioning devices for chains,belts or the like
GB1279526A (en) * 1969-09-15 1972-06-28 Gerhard Winklhofer Tensioning device for power transmitting elements
GB1285528A (en) * 1970-06-16 1972-08-16 Tsubakimoto Chain Co Improvements in tensioning devices for endless flexible drive members
GB1387094A (en) * 1972-05-17 1975-03-12 Yamakyu Chain Kk Tensioning device for flexible members
EP0106325A1 (en) * 1982-10-15 1984-04-25 Joh. Winklhofer &amp; Söhne Tensioner for chain drive

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6454672B2 (en) * 2000-01-21 2002-09-24 Tsubakimoto Chain Co. Ratchet tensioner with mechanism for locking and releasing a plunger
US7691017B2 (en) 2004-04-23 2010-04-06 Borgwarner Morse Tec Japan K.K. Hydraulic tensioner

Also Published As

Publication number Publication date
DE3535915A1 (en) 1987-04-09
GB2181210B (en) 1989-09-13
GB8524627D0 (en) 1985-11-06
FR2588346A1 (en) 1987-04-10

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921005