CA2135185A1 - Endless flexible drive belt - Google Patents
Endless flexible drive beltInfo
- Publication number
- CA2135185A1 CA2135185A1 CA002135185A CA2135185A CA2135185A1 CA 2135185 A1 CA2135185 A1 CA 2135185A1 CA 002135185 A CA002135185 A CA 002135185A CA 2135185 A CA2135185 A CA 2135185A CA 2135185 A1 CA2135185 A1 CA 2135185A1
- Authority
- CA
- Canada
- Prior art keywords
- strip
- continuous belt
- belt according
- belt
- joining
- 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.)
- Abandoned
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
- F16H7/02—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
-
- 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
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G1/00—Driving-belts
- F16G1/20—Driving-belts made of a single metal strip
-
- 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
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G1/00—Driving-belts
- F16G1/28—Driving-belts with a contact surface of special shape, e.g. toothed
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Belt Conveyors (AREA)
Abstract
A continuous belt for power transmission has a thin elongated strip (10) having a pair of ends. A serpentine biasing portion (22, 30, 32, 34) is integrally formed in the strip between the ends.
Also, the ends are permanently joined with one another to provide an endless belt to transit power or torque.
Also, the ends are permanently joined with one another to provide an endless belt to transit power or torque.
Description
~W093/236~ 33 ~ ~ i PCr/USg2/041~3 . .
NDI.BB8 ~E:~IBL1@ PRI~ 9ELT
~C:K~RO~ AND B~RY QF ~ INV$~ION
r The present invention rel~'ces to drive belts ~nd, more particularly, to an endless or continuous drive belt with a ~;erpentine ~pring biasing: portion.
Ordinarily, drive belts which drive rotary equipment are either of a belt or chain type. The belt type is gen~rally manllfactured from a polymeric material with or withc)ut reinforcing filament ~trands. The r~ain type generally includes a plurality of interconrlected 1 ink~ .
~: In the automotive ir~dustry , fan belts are commonly used to transmit power ~rom an enS~ine to various ~ccessories such as compressors, alternators or the like. D~aring start-up of the : :
engine, a peak ~orque is required to ~be~in t~ turn or rotate the belt to ~rive the accessories. On~e the engine starts and runs, th~ tor;~ue is reduced hnd less force is exerted onto the ~elt~
;During ~the peak torgue at ~tart-up, the ~elt i~ ~tretched to a degree that ~nay permanently t~orm t~e ~elt. Ordinarily, an ajus~ble tensioner is utillæed~ to t ~lce up ~e. ~xcessive play in t~e f~n belt~ Thus, ~t would be ~desir~ble to provide ~ continuous b@lt which would reduce th~ peak torque requir~d by the engine ~ithout :p@~nanen~ de~or~ation of th~ :~belt.
Accordingly, It ~ n objeet of the pre~;~n'c i~avention to ov~rcome the aboY~ ~isadvantag~ Th~ pre~ent invention provide~
:
~: :
:
wo 93,2368g 2 1 3 5 1 ~ ~
a continuous belt with a ~erpentine spring biasing portion to transmit torque which is easily adapted to replace belts or chains.
The present invention provides a continuou belt which has more than one ~ode of recover~ble deformation to enable the belt to fir~t elongate in response to & large force ~nd to provide ~dditional elongation in response to a ~uch smaller force. This endless belt ena~les the enqine to h~ve a lower peaX torque at ~tart-up. -From the ~ollowing descripti3n ~nd claims, taken inconjunction with t~e accompanying drawings, other ob~ects and advantages of the p~esent~invention will become ~pparent to those skilled in the art.:
R~P ~5~ ON OF ~E DRAWING8 :: :
Figure l illustrates a ~che~atic Yiew of driving and driven equipment including~a continuous belt in accordance with the ; : ~ prese~t invention. ~ ~
: :
Figure 2 is ~:~parti~l persp~ctive view of the continuous belt in accordanoe with the~present inYention.
Figu~e 3 is a~graph~ of the force v~rsus displ~cement of the elt in acco~dance Yith the pre~ent inv~ntion.
: ~ ,Figur~4:i~ ~ pArtia1 per8pertive view of ~no~her embodiment of a ~elt in accordance~wi~h ~he pre5ent invention.
igura 5 ~ ~ cro5~ ~ction ~iQW of ~no4her b~lt in ~ccordance : : wlth:the presen~ in~enti~n.
:
. :
:
:: :
~ .
0~3/23688 ~1 3~ ;3 PCT/US9~/04123 Figure 6 i5 a cross ~ecti~n view of another embodiment of the pres2nt invention.
Fisure 7 is a cross section view of another embodimrent of the present invention.
Turning to the Figures, p~rticul~rly Fi~ure 1, ~ continuous belt i~ ~hown ~nd de~ignated wi~ th~ reference numeral lO. The ~ontinuous ~elt lO is illustrated with a ~echanism for driving the belt 12, ~uch as an en~ine, and ~ de~ice 14, such as ~ compressor, which is driven by the belt. The belt ~0 is ssociated with the driving and driven~devices via pulley~ 16 and 18. ~l~o, a belt tensioning device 20 is posi~ioned on the return side of the belt lO to ~ake up 51ack in the be~t lO.
The belt 10 is an elongated strip nd ~ay be formed from any 8uit:able metallic ~hset material having reguisite trength resilien~ characteristics. Th~ belt lO has a ~erpentine pattern 22 continuou~ throug~out the belt lO fro~ one e~d to th~ other. The erpentine pattern 22 includes a plurality of in~rconnected ; uni~ary U-shaped~embers 30 ha~i~g a pair of legs 32 ~onnected by :
~: a web 34 0 Eac~ alternating U-sh~ped member 30 is in~verted with re pect to it~ ~djdcen~ IJ sh~ped m@m~er~ 30. ~ehe IJ ~haped ~embers 30 have an ¢w~rall ~ectangular cro~ ~ection with a ~ubst~tially on~ant thickness. A ~lot 36 ~hich ~ep~rates l~g~ 32 ~xtend from lateral ~dge of the belt ~w~rd to the w~b 34, a di~tanee beyonù
.
t~e lor~gitudinal axis o~ belt ~0. The ~erpent~ne U-shaped con~igura~ion i~ ke ~h~t ai~c1O~d in ~ppliç~nt'~ U.5. ~atent No.
~3~
W~3/23688 ' PCT/US92/0412~f.
-4- ,..
4,9lg,403, issued April 24, l990, entitled "SERPENTINE STRIP
SPRI~G" and U.S. Patent Application Serial No. ~16,155, filed Oc~ober 7~ l986, entitled "SPRING", the ~pecifications of ~th which are herein expressly incorporated by re~erence.
The belt lO i~ designed ~uch that ~he width of the legs 32 is generally less than the width of khe webs 34 a~ ~een in FigurP 2.
~his provides bending across the width di~ensions when longitudinal ~xial forc~s, designated by Fl ~nd F2~ are applied on the belt l0.
Once the longitudina1 axial forces reach a d~termined value, the legs 32 will begin to: ~tWlSt in response to additional force. This twist is the result of bending ~cross ~he roots 34 of the thickness 33 of the material, referred to ~s "root pu~kerl', where ~he deformation is along~the thickness of the belt lO, and bending across the width of the legs. The forces on ~arlous portions of the belt lO ~aterial can be determined by a ~inite element ~nalysis ~o that the belt lO may be decigned to deform as d~sired in response to the applied driving and driven forces~ T~e belt lO ~ay b~ manufactured from prehardened stainless steel ~nd ~ay be formed by laser o~ a~rasive cuttLng tec~niques. Also, annealing or edge treatments ~ay ~e ~onducted`on the belt lO ~y 1 ser or other ~eans.
Figure 3 illustrates a Porce ~er~u6 di~placeme~t or ~lo~gation gr~ph~ As the b~lt lO 5~retches ~n re~pons~ t~ forces ~n the Fl-F2 .
direction of Figure 2, a firct ~pring con~t~nt i~ pre~ent and is ~5ignat~d with th~ nu~eral 40. As continued force i~ applied to , ~ : ~he belt~lO, the b~1t lO b~gi~s to ~dditionally bend ~cross the : ~
:
VO 93/236~8 2 1 3 ~) ~ 8 S Pcr/us92/04123 t~.ic:kness of the ~trip material going into the ~econd spring constant whit-h is designated with the reference numeral 42.
The phantom line in Figure 3 illustrates the force versus elongation graph of a currently used fan belt. The point designated wit~ reference letter ~" illu~trates t~e normal running force that i~ generally applied to the belt when t:he driving ~echanism is continuously operating. The point "B" designates the pea~c force required at st2~ up to begin 2~0vemen~ c~f the b2it, and devices driven ~y the belt. ~s can be ~een in the graph, the peak force in he present invention is 31lu::h less than that of o~lrrently used belts. ~lso, while the displ~cement or elongation of the present invention is more than that of currently used belts, the peak force is significantly reduced. The belt tends to individually ~tart individual dri~en devices when ~ore t}~an one device 1:4: is being driven, ~nd th elongatioJl of the ~elt is oontroll~d by the design and ~aterial of the belt lO.
~ ~ :
Returning to Figure l, the torque is trans~itted from the dri~ing mechanism~12 to~ t~e driven deYice by the input side 50 of he b~lt lO. In effect, ~ the p~alley 16 pulls or belt 10 in the directioll of the ar~row 52~ The force in the belt between pulley 16 and 18 on ~he input ~ides i~ proportional to the ~a~ount of ~he ~tretc:h o~ belt: in the input ~r~ction 52 ~s ~own ~n ~e curve of IFigure 2. As ~:he ~elt 10 i~ ~;tretch~d, ~h~ return ~ide 54 of t:~e bel~ includes ~lac:k. The ~no~ t of ~lack ~y b~ controlled ~y :
cie~gn hnd lD~terlal, the t-n-ion pulley ~ech~ni~ Z0 ~y l:e used ::
,;3 ~ .
wo 93~23688 ~ 1 3 5 1~,, PCT/US92/~412 ~
which moves to app~y tension ont~ the belt 10 to take up the slack.
When the driving and driven devices 12 and 14 are a~ rest, the ~elt lO i5 generally taut without ~lack on the return side. Upon starting of the driving device 12, the belt lO ~tret~hes ~long the input side 50 and the pulley 18 begins ~o turn. ~s this occurs, the tens~n uptake pulley mechani~m 20, when used, ~oves to take up the Qxcess slacX in the belt lO on the return ~ide 54. The ~ovement of the tension pulley ~echanism 20 provides a mechanism ~o enable instantaneous ~easuring of the force applied to pulley 18 or the torque that is applied onto the dri~en device 14. The reading of the torque enables real time al~ering of the power input of the dri~ing device 12 so that the power input of the driving de~ice 12 i~ contro}led by the work that is being done by the driven device 140 This also permits~ completely ~topping the input should the force require to turn pulley 18 ri~e in the case of overload or failure of driven:de~ice 14.
.
Turnsng t~ Figure- 4, ~nother embodi~ent of the present ~ : invention is illustrated. The ~prin~ lO is ~ubstantially the same : as that pr~viously describ~d including the plurality of U-~haped . ~embers: 30 with legs 32 ~nd w~bs 34. ~ach l~g 32 includes a pzd : ~em~er 60 whi~h extends into ~he 810t 36 on ~he ~pring. The pzd .
:~ ~ ~e~bsr~ 60 proYid~ ~or~reduced de~}ection of the I~g ~ember 32, and ~ddi~ionally when the belt i8 in contaet wi~h pull~y te~th 62 of pulley 64 like thi~t ~hown in Figure 4. The pads 60 ~ay inc~ude openings 66 to prov~de ~ddi1:ional d~ ction o th~ p~ds. The pads 60 ar~ g~nerally unitarily form~d on the legs during th2 forming :
- :
:
~ "V093/23688 2 1 3 S 1 ~ S PCT/US92/04123 f~
. . .
process of the belt. The pads 60 generally include 2n ~rcuate ~urface for a~utting the teeth.
Turning ~o Fi~ure 5, an embodiment like ~hat of Figure ~ is shown. In Figure 5, the ~pring is su~stanti~lly ~he ~ame as that previously descri~ed, however, the pad~ ~0 ~re upwardly arcuate me~ers ~nd t~e pulley teeth 62 no longer occupy a position under roots 54. Als~, ~ plate 72 ~s ~llustrat~d which ~oins two ends of the strip to form ~ continuous b~lt. The pl~te 72 ~ay ~e welded, adhered or the like onto the ends of ~erpen~ine configurations.
The plate may be in the web area, or leg area, or may extend across the legs and be secuxed to ~he we~ as well as the legs.
Pigure 6 is a figure like t~at of Figure 5 illustrating the belt like t~at has been previou~ly described, however, in Figure 6 a:~bu~t weld 80 is used to join toyether the ends of the belt. The ~ , w~Id ~ay ~be in ~he web ~rea or ~he ~trip m~y be c~t such that a pair of:leg5 are wel~ded together. Also, the pulley ~ay include an e~lastom ric cover a2 which includes 2 plurality of projecting teeth 84. ~Th~ elastomerio ~co~er pro~ides Qasy defor~ation while extending the lif~ of th~ bel~t.
Figure 7 shows the case where the belt 10 has been encap~ulated on on~ or ~oth ~id~ ~y an el~sto~s~. The belt 10 has n encap~ulat~d by n ~teri~l 92. ~ The ~ater~al g2 ~ay ha~e no pr~i8ion for guiding or engaging pulley a~ ~ indicated ~y ~ur~ce 94, or ~ay b~ pro~ided with ~e~ns 96 f or guid ing or , ~ nga~ 0 :: ~
~13 i 1 ~ J
WO 93~23688 PCr/ VS92/04 1 23 The continuous belt of the present invention provides lower peak star~ing torque of the driving device, instantaneous running measurement nf tQrque; accommodation of ~udden ~urges of torque;
and has ~ lower :bearing load ~nd proYides energy ~a~ing from inherPnt lower peak design of the driving device.
While the ~bove describes the preferred embodiment of the present invention, it will be under~tood ~hat the inventicn is ~ceptible ~o ~odific3tion, variation ~nd alteration without deviating from the scope cn~ fair ~eaning o~ the ~ubjoined claims.
:
: : ' : ~
:: .
; :: ~
NDI.BB8 ~E:~IBL1@ PRI~ 9ELT
~C:K~RO~ AND B~RY QF ~ INV$~ION
r The present invention rel~'ces to drive belts ~nd, more particularly, to an endless or continuous drive belt with a ~;erpentine ~pring biasing: portion.
Ordinarily, drive belts which drive rotary equipment are either of a belt or chain type. The belt type is gen~rally manllfactured from a polymeric material with or withc)ut reinforcing filament ~trands. The r~ain type generally includes a plurality of interconrlected 1 ink~ .
~: In the automotive ir~dustry , fan belts are commonly used to transmit power ~rom an enS~ine to various ~ccessories such as compressors, alternators or the like. D~aring start-up of the : :
engine, a peak ~orque is required to ~be~in t~ turn or rotate the belt to ~rive the accessories. On~e the engine starts and runs, th~ tor;~ue is reduced hnd less force is exerted onto the ~elt~
;During ~the peak torgue at ~tart-up, the ~elt i~ ~tretched to a degree that ~nay permanently t~orm t~e ~elt. Ordinarily, an ajus~ble tensioner is utillæed~ to t ~lce up ~e. ~xcessive play in t~e f~n belt~ Thus, ~t would be ~desir~ble to provide ~ continuous b@lt which would reduce th~ peak torque requir~d by the engine ~ithout :p@~nanen~ de~or~ation of th~ :~belt.
Accordingly, It ~ n objeet of the pre~;~n'c i~avention to ov~rcome the aboY~ ~isadvantag~ Th~ pre~ent invention provide~
:
~: :
:
wo 93,2368g 2 1 3 5 1 ~ ~
a continuous belt with a ~erpentine spring biasing portion to transmit torque which is easily adapted to replace belts or chains.
The present invention provides a continuou belt which has more than one ~ode of recover~ble deformation to enable the belt to fir~t elongate in response to & large force ~nd to provide ~dditional elongation in response to a ~uch smaller force. This endless belt ena~les the enqine to h~ve a lower peaX torque at ~tart-up. -From the ~ollowing descripti3n ~nd claims, taken inconjunction with t~e accompanying drawings, other ob~ects and advantages of the p~esent~invention will become ~pparent to those skilled in the art.:
R~P ~5~ ON OF ~E DRAWING8 :: :
Figure l illustrates a ~che~atic Yiew of driving and driven equipment including~a continuous belt in accordance with the ; : ~ prese~t invention. ~ ~
: :
Figure 2 is ~:~parti~l persp~ctive view of the continuous belt in accordanoe with the~present inYention.
Figu~e 3 is a~graph~ of the force v~rsus displ~cement of the elt in acco~dance Yith the pre~ent inv~ntion.
: ~ ,Figur~4:i~ ~ pArtia1 per8pertive view of ~no~her embodiment of a ~elt in accordance~wi~h ~he pre5ent invention.
igura 5 ~ ~ cro5~ ~ction ~iQW of ~no4her b~lt in ~ccordance : : wlth:the presen~ in~enti~n.
:
. :
:
:: :
~ .
0~3/23688 ~1 3~ ;3 PCT/US9~/04123 Figure 6 i5 a cross ~ecti~n view of another embodiment of the pres2nt invention.
Fisure 7 is a cross section view of another embodimrent of the present invention.
Turning to the Figures, p~rticul~rly Fi~ure 1, ~ continuous belt i~ ~hown ~nd de~ignated wi~ th~ reference numeral lO. The ~ontinuous ~elt lO is illustrated with a ~echanism for driving the belt 12, ~uch as an en~ine, and ~ de~ice 14, such as ~ compressor, which is driven by the belt. The belt ~0 is ssociated with the driving and driven~devices via pulley~ 16 and 18. ~l~o, a belt tensioning device 20 is posi~ioned on the return side of the belt lO to ~ake up 51ack in the be~t lO.
The belt 10 is an elongated strip nd ~ay be formed from any 8uit:able metallic ~hset material having reguisite trength resilien~ characteristics. Th~ belt lO has a ~erpentine pattern 22 continuou~ throug~out the belt lO fro~ one e~d to th~ other. The erpentine pattern 22 includes a plurality of in~rconnected ; uni~ary U-shaped~embers 30 ha~i~g a pair of legs 32 ~onnected by :
~: a web 34 0 Eac~ alternating U-sh~ped member 30 is in~verted with re pect to it~ ~djdcen~ IJ sh~ped m@m~er~ 30. ~ehe IJ ~haped ~embers 30 have an ¢w~rall ~ectangular cro~ ~ection with a ~ubst~tially on~ant thickness. A ~lot 36 ~hich ~ep~rates l~g~ 32 ~xtend from lateral ~dge of the belt ~w~rd to the w~b 34, a di~tanee beyonù
.
t~e lor~gitudinal axis o~ belt ~0. The ~erpent~ne U-shaped con~igura~ion i~ ke ~h~t ai~c1O~d in ~ppliç~nt'~ U.5. ~atent No.
~3~
W~3/23688 ' PCT/US92/0412~f.
-4- ,..
4,9lg,403, issued April 24, l990, entitled "SERPENTINE STRIP
SPRI~G" and U.S. Patent Application Serial No. ~16,155, filed Oc~ober 7~ l986, entitled "SPRING", the ~pecifications of ~th which are herein expressly incorporated by re~erence.
The belt lO i~ designed ~uch that ~he width of the legs 32 is generally less than the width of khe webs 34 a~ ~een in FigurP 2.
~his provides bending across the width di~ensions when longitudinal ~xial forc~s, designated by Fl ~nd F2~ are applied on the belt l0.
Once the longitudina1 axial forces reach a d~termined value, the legs 32 will begin to: ~tWlSt in response to additional force. This twist is the result of bending ~cross ~he roots 34 of the thickness 33 of the material, referred to ~s "root pu~kerl', where ~he deformation is along~the thickness of the belt lO, and bending across the width of the legs. The forces on ~arlous portions of the belt lO ~aterial can be determined by a ~inite element ~nalysis ~o that the belt lO may be decigned to deform as d~sired in response to the applied driving and driven forces~ T~e belt lO ~ay b~ manufactured from prehardened stainless steel ~nd ~ay be formed by laser o~ a~rasive cuttLng tec~niques. Also, annealing or edge treatments ~ay ~e ~onducted`on the belt lO ~y 1 ser or other ~eans.
Figure 3 illustrates a Porce ~er~u6 di~placeme~t or ~lo~gation gr~ph~ As the b~lt lO 5~retches ~n re~pons~ t~ forces ~n the Fl-F2 .
direction of Figure 2, a firct ~pring con~t~nt i~ pre~ent and is ~5ignat~d with th~ nu~eral 40. As continued force i~ applied to , ~ : ~he belt~lO, the b~1t lO b~gi~s to ~dditionally bend ~cross the : ~
:
VO 93/236~8 2 1 3 ~) ~ 8 S Pcr/us92/04123 t~.ic:kness of the ~trip material going into the ~econd spring constant whit-h is designated with the reference numeral 42.
The phantom line in Figure 3 illustrates the force versus elongation graph of a currently used fan belt. The point designated wit~ reference letter ~" illu~trates t~e normal running force that i~ generally applied to the belt when t:he driving ~echanism is continuously operating. The point "B" designates the pea~c force required at st2~ up to begin 2~0vemen~ c~f the b2it, and devices driven ~y the belt. ~s can be ~een in the graph, the peak force in he present invention is 31lu::h less than that of o~lrrently used belts. ~lso, while the displ~cement or elongation of the present invention is more than that of currently used belts, the peak force is significantly reduced. The belt tends to individually ~tart individual dri~en devices when ~ore t}~an one device 1:4: is being driven, ~nd th elongatioJl of the ~elt is oontroll~d by the design and ~aterial of the belt lO.
~ ~ :
Returning to Figure l, the torque is trans~itted from the dri~ing mechanism~12 to~ t~e driven deYice by the input side 50 of he b~lt lO. In effect, ~ the p~alley 16 pulls or belt 10 in the directioll of the ar~row 52~ The force in the belt between pulley 16 and 18 on ~he input ~ides i~ proportional to the ~a~ount of ~he ~tretc:h o~ belt: in the input ~r~ction 52 ~s ~own ~n ~e curve of IFigure 2. As ~:he ~elt 10 i~ ~;tretch~d, ~h~ return ~ide 54 of t:~e bel~ includes ~lac:k. The ~no~ t of ~lack ~y b~ controlled ~y :
cie~gn hnd lD~terlal, the t-n-ion pulley ~ech~ni~ Z0 ~y l:e used ::
,;3 ~ .
wo 93~23688 ~ 1 3 5 1~,, PCT/US92/~412 ~
which moves to app~y tension ont~ the belt 10 to take up the slack.
When the driving and driven devices 12 and 14 are a~ rest, the ~elt lO i5 generally taut without ~lack on the return side. Upon starting of the driving device 12, the belt lO ~tret~hes ~long the input side 50 and the pulley 18 begins ~o turn. ~s this occurs, the tens~n uptake pulley mechani~m 20, when used, ~oves to take up the Qxcess slacX in the belt lO on the return ~ide 54. The ~ovement of the tension pulley ~echanism 20 provides a mechanism ~o enable instantaneous ~easuring of the force applied to pulley 18 or the torque that is applied onto the dri~en device 14. The reading of the torque enables real time al~ering of the power input of the dri~ing device 12 so that the power input of the driving de~ice 12 i~ contro}led by the work that is being done by the driven device 140 This also permits~ completely ~topping the input should the force require to turn pulley 18 ri~e in the case of overload or failure of driven:de~ice 14.
.
Turnsng t~ Figure- 4, ~nother embodi~ent of the present ~ : invention is illustrated. The ~prin~ lO is ~ubstantially the same : as that pr~viously describ~d including the plurality of U-~haped . ~embers: 30 with legs 32 ~nd w~bs 34. ~ach l~g 32 includes a pzd : ~em~er 60 whi~h extends into ~he 810t 36 on ~he ~pring. The pzd .
:~ ~ ~e~bsr~ 60 proYid~ ~or~reduced de~}ection of the I~g ~ember 32, and ~ddi~ionally when the belt i8 in contaet wi~h pull~y te~th 62 of pulley 64 like thi~t ~hown in Figure 4. The pads 60 ~ay inc~ude openings 66 to prov~de ~ddi1:ional d~ ction o th~ p~ds. The pads 60 ar~ g~nerally unitarily form~d on the legs during th2 forming :
- :
:
~ "V093/23688 2 1 3 S 1 ~ S PCT/US92/04123 f~
. . .
process of the belt. The pads 60 generally include 2n ~rcuate ~urface for a~utting the teeth.
Turning ~o Fi~ure 5, an embodiment like ~hat of Figure ~ is shown. In Figure 5, the ~pring is su~stanti~lly ~he ~ame as that previously descri~ed, however, the pad~ ~0 ~re upwardly arcuate me~ers ~nd t~e pulley teeth 62 no longer occupy a position under roots 54. Als~, ~ plate 72 ~s ~llustrat~d which ~oins two ends of the strip to form ~ continuous b~lt. The pl~te 72 ~ay ~e welded, adhered or the like onto the ends of ~erpen~ine configurations.
The plate may be in the web area, or leg area, or may extend across the legs and be secuxed to ~he we~ as well as the legs.
Pigure 6 is a figure like t~at of Figure 5 illustrating the belt like t~at has been previou~ly described, however, in Figure 6 a:~bu~t weld 80 is used to join toyether the ends of the belt. The ~ , w~Id ~ay ~be in ~he web ~rea or ~he ~trip m~y be c~t such that a pair of:leg5 are wel~ded together. Also, the pulley ~ay include an e~lastom ric cover a2 which includes 2 plurality of projecting teeth 84. ~Th~ elastomerio ~co~er pro~ides Qasy defor~ation while extending the lif~ of th~ bel~t.
Figure 7 shows the case where the belt 10 has been encap~ulated on on~ or ~oth ~id~ ~y an el~sto~s~. The belt 10 has n encap~ulat~d by n ~teri~l 92. ~ The ~ater~al g2 ~ay ha~e no pr~i8ion for guiding or engaging pulley a~ ~ indicated ~y ~ur~ce 94, or ~ay b~ pro~ided with ~e~ns 96 f or guid ing or , ~ nga~ 0 :: ~
~13 i 1 ~ J
WO 93~23688 PCr/ VS92/04 1 23 The continuous belt of the present invention provides lower peak star~ing torque of the driving device, instantaneous running measurement nf tQrque; accommodation of ~udden ~urges of torque;
and has ~ lower :bearing load ~nd proYides energy ~a~ing from inherPnt lower peak design of the driving device.
While the ~bove describes the preferred embodiment of the present invention, it will be under~tood ~hat the inventicn is ~ceptible ~o ~odific3tion, variation ~nd alteration without deviating from the scope cn~ fair ~eaning o~ the ~ubjoined claims.
:
: : ' : ~
:: .
; :: ~
Claims (15)
- Claim 1. An endless flexible drive belt comprising:
a thin elongated strip having a pair of ends;
a resilient serpentine biasing portion integrally formed in said strip between said ends; and means for permanent joining said ends with one another for providing a continuous belt for transmitting power. - Claim 2. The continuous belt according to Claim 1 wherein said serpentine portion is continuous from end to end of said strip.
- Claim 3. The continuous belt according to Claim 1 wherein said means for joining includes a butt weld joining said ends.
- Claim 4. The continuous belt according to Claim 1 wherein said means for joining includes a thin plate secured to said ends.
- Claim 5. The continuous belt according to Claim 1 wherein said strip is metallic.
- PCT/US92/04123 Claim 6. A continuous belt for transmitting power comprising:
a flat elongated strip having a pair of ends;
a resilient serpentine biasing portion integrally formed in said strip between said ends, said resilient serpentine biasing portion comprised of a plurality of interconnected unitary U-shaped members having a pair of legs connected by a web, each alternating U-shaped member being inverted with respect to its adjacent U-shaped members, an elongated slot formed between the legs of each U-shaped member, said elongated slot extending from a lateral edge of the strip past a central longitudinal axis of the strip, said resilient serpentine biasing portion providing axial deflection along the longitudinal axis of the strip, said resilient biasing portion U-shaped members each having an overall rectangular cross section with a substantially constant thickness; and means for joining said ends with one another for providing a continuous belt for transmitting power. - Claim 7. The continuous belt according to claim 6 wherein said serpentine portion is continuous from end to end of said strip.
- Claim 8. The continuous belt according to claim 6 wherein a pad for engaging pulley teeth extends from each of said legs into said slot opposing one another.
- Claim 9. The continuous belt according to claim 8 wherein said pads include an open area for providing deflection of said pads.
- Claim 10. The continuous belt a according to claim 6 wherein said web portions having a width greater than said leg portions.
- Claim 11. The continuous belt according to claim 6 wherein said strip is metallic
- Claim 12. The continuous belt according to claim 6 wherein aid strip has a sufficiently large modulus of elasticity or stiffness.
- Claim 13. The continuous belt according the claim 6 wherein said resilient biasing portion resiliently deflecting in a first direction along said longitudinal axis in response to force applied on said strip and resiliently deflecting in a second direction along the thickness of the cross section in response to continued force applied on said strip.
- Claim 14. The continuous belt according to claim 6 wherein said means for joining includes a butt weld joining said end
- Claim 15. The continuous belt according to claim 6 wherein said means for joining includes a thin plate secured to said ends.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP92912693A EP0643810A4 (en) | 1992-05-18 | 1992-05-18 | Endless flexible drive belt. |
| PCT/US1992/004123 WO1993023688A1 (en) | 1992-05-18 | 1992-05-18 | Endless flexible drive belt |
| CA002135185A CA2135185A1 (en) | 1992-05-18 | 1992-05-18 | Endless flexible drive belt |
| AU21415/92A AU669663B2 (en) | 1992-05-18 | 1992-05-18 | Endless flexible drive belt |
| JP5520154A JPH07506891A (en) | 1992-05-18 | 1992-05-18 | Endless flexible drive belt |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US1992/004123 WO1993023688A1 (en) | 1992-05-18 | 1992-05-18 | Endless flexible drive belt |
| CA002135185A CA2135185A1 (en) | 1992-05-18 | 1992-05-18 | Endless flexible drive belt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2135185A1 true CA2135185A1 (en) | 1993-11-25 |
Family
ID=4154615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002135185A Abandoned CA2135185A1 (en) | 1992-05-18 | 1992-05-18 | Endless flexible drive belt |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0643810A4 (en) |
| JP (1) | JPH07506891A (en) |
| AU (1) | AU669663B2 (en) |
| CA (1) | CA2135185A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007019823A1 (en) * | 2005-08-11 | 2007-02-22 | Multivac Sepp Haggenmüller Gmbh & Co. Kg | Chain for a machine drive, transport of material in a machine or the like, and packaging machine comprising one such chain |
| US8225586B2 (en) | 2008-03-28 | 2012-07-24 | Cp Packaging, Inc. | Belt driven clamping arrangement for gripping and advancing web material in a packaging machine |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1099528A (en) * | 1954-02-12 | 1955-09-06 | Sedis Transmissions Mec | endless transmission element |
| US3156126A (en) * | 1962-06-01 | 1964-11-10 | Sol A Levy Jr | Positive belt drives |
| US3851536A (en) * | 1973-02-16 | 1974-12-03 | Rockwell International Corp | Power transmission belt |
| DD238093A1 (en) * | 1985-06-04 | 1986-08-06 | Wismar Mechanisierung | BELT |
| US4662863A (en) * | 1985-08-30 | 1987-05-05 | Uniroyal Power Transmission Co., Inc. | Double-acting power transmission belt |
| JPH0621604B2 (en) * | 1988-01-27 | 1994-03-23 | バンドー化学株式会社 | Toothed belt and power transmission device using the belt |
| US4820248A (en) * | 1988-03-16 | 1989-04-11 | Neuberne H. Brown, Jr. | Belt for use in a transmission system |
| EP0534956B1 (en) * | 1989-08-02 | 1995-05-03 | Dayco Products, Inc. | Method of making a toothed belt construction |
-
1992
- 1992-05-18 JP JP5520154A patent/JPH07506891A/en active Pending
- 1992-05-18 EP EP92912693A patent/EP0643810A4/en not_active Ceased
- 1992-05-18 AU AU21415/92A patent/AU669663B2/en not_active Ceased
- 1992-05-18 CA CA002135185A patent/CA2135185A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007019823A1 (en) * | 2005-08-11 | 2007-02-22 | Multivac Sepp Haggenmüller Gmbh & Co. Kg | Chain for a machine drive, transport of material in a machine or the like, and packaging machine comprising one such chain |
| US7922614B2 (en) | 2005-08-11 | 2011-04-12 | Multivac Sepp Haggenmuller Gmbh & Co. Kg | Chain for a machine drive, transport of material in a machine or the like, and packaging machine comprising one such chain |
| US8225586B2 (en) | 2008-03-28 | 2012-07-24 | Cp Packaging, Inc. | Belt driven clamping arrangement for gripping and advancing web material in a packaging machine |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2141592A (en) | 1993-12-13 |
| JPH07506891A (en) | 1995-07-27 |
| EP0643810A1 (en) | 1995-03-22 |
| AU669663B2 (en) | 1996-06-20 |
| EP0643810A4 (en) | 1995-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5266066A (en) | Spring blade chain tensioner | |
| EP0867600B1 (en) | A chain tensioner having a shoe made of plastic material and a blade spring or springs with curved ends | |
| EP2008001B1 (en) | Ratchet mechanism for a chain drive | |
| US7476168B2 (en) | Pivoting mechanical tensioner with cross strand damping | |
| KR101318131B1 (en) | Chain tensioning device linking two strands of a chain drive | |
| EP1915549B1 (en) | Long mechanical tensioner with a compliant blade spring | |
| EP1715217A2 (en) | Mechanical chain tensioner with ratcheting device | |
| US6620067B1 (en) | Tensioner device | |
| US20130059687A1 (en) | Mechanical tensioner with one way damping | |
| CA2135185A1 (en) | Endless flexible drive belt | |
| EP2076692B1 (en) | Pivot arm tensioner with sliding ratchet mechanism | |
| CA2400889C (en) | Multi-ribbed cvt belt | |
| JPH0240133B2 (en) | ||
| CN101779053B (en) | V-belt for high-load transmission | |
| EP0870128B1 (en) | Tensioning device for drive belts | |
| US20070026987A1 (en) | Power transmission chain and power transmission device | |
| WO1993023688A1 (en) | Endless flexible drive belt | |
| JPH031539B2 (en) | ||
| EP0055162A1 (en) | Endless chain or belt tensioning and guiding device | |
| EP1496290B1 (en) | A mechanical tensioner for the timing chain of a distribution system | |
| JPS6334338B2 (en) | ||
| JPS5817155Y2 (en) | Tightener | |
| EP1471284A1 (en) | Check valve for hydraulic chain tensioner | |
| RU2091635C1 (en) | Flexible tie transmission | |
| EP1538368B1 (en) | Toothed rack for hydraulic chain tensioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |