GB2181210A - Belt or chain tensioning device - Google Patents
Belt or chain tensioning device Download PDFInfo
- 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
Links
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
Landscapes
- 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)
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.
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)
Country | Link |
---|---|
DE (1) | DE3535915A1 (en) |
FR (1) | FR2588346A1 (en) |
GB (1) | GB2181210B (en) |
Cited By (2)
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)
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)
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 & Söhne | Tensioner for chain drive |
Family Cites Families (5)
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 |
-
1985
- 1985-10-05 GB GB8524627A patent/GB2181210B/en not_active Expired
- 1985-10-08 DE DE19853535915 patent/DE3535915A1/en not_active Ceased
- 1985-10-08 FR FR8515280A patent/FR2588346A1/en active Pending
Patent Citations (6)
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 & Söhne | Tensioner for chain drive |
Cited By (2)
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 |
---|---|
FR2588346A1 (en) | 1987-04-10 |
GB2181210B (en) | 1989-09-13 |
DE3535915A1 (en) | 1987-04-09 |
GB8524627D0 (en) | 1985-11-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19921005 |