CA2011232A1 - Planetary gear system - Google Patents
Planetary gear systemInfo
- Publication number
- CA2011232A1 CA2011232A1 CA 2011232 CA2011232A CA2011232A1 CA 2011232 A1 CA2011232 A1 CA 2011232A1 CA 2011232 CA2011232 CA 2011232 CA 2011232 A CA2011232 A CA 2011232A CA 2011232 A1 CA2011232 A1 CA 2011232A1
- Authority
- CA
- Canada
- Prior art keywords
- flexible belt
- gear
- annulus
- gear system
- gearing
- 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
Landscapes
- Transmission Devices (AREA)
- Retarders (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE.
To permit misalignment of shafts coupling a sun wheel, an annulus, and a cage structure of a planetary gear, the planet wheel on the cage structure is formed as an engagement wheel pressing a flexible belt, such as toothed belt or a sprocket chain, against an internal gear (6, 106) of the annulus (5, 105), the flexible belt (5, 15, 115) being looped in part about the gear (3) of the sun wheel (2). The cage (8, 8', 108) is a structure which includes at least one, and preferably three or more radially projecting arms (9, 10, 11, 109) on which respective planet wheels are carried, ensuring engagement of the flexible belt with the internal annulus gear and positioning said flexible belt for being looped about the sun wheel.
To permit misalignment of shafts coupling a sun wheel, an annulus, and a cage structure of a planetary gear, the planet wheel on the cage structure is formed as an engagement wheel pressing a flexible belt, such as toothed belt or a sprocket chain, against an internal gear (6, 106) of the annulus (5, 105), the flexible belt (5, 15, 115) being looped in part about the gear (3) of the sun wheel (2). The cage (8, 8', 108) is a structure which includes at least one, and preferably three or more radially projecting arms (9, 10, 11, 109) on which respective planet wheels are carried, ensuring engagement of the flexible belt with the internal annulus gear and positioning said flexible belt for being looped about the sun wheel.
Description
201~ 232 :
~ , - i .. .
., ~
., !, ': -Fleld of the Invention.
~, The present invention relates to a motion transmission ~ystem, and more particularly.to a planetary gear system, ln whlch the sun.wheel ant the annulus are operatively coupled by a planet wheel located on a cage structure whlch ha~ a pro~ectlng arm.
Background.
The referenced technlcal llterature deæcrlbes a planetary gear ln whlch a cage element 18 formed as a single arm on whlch a planetary wheel 1B Journalled, ln engagement with the sun gear and an internal gear of the annulus. Slnce the sun gear and the annulus have gear teeth which mesh *lth the , :
.
~ :~:
~ , - i .. .
., ~
., !, ': -Fleld of the Invention.
~, The present invention relates to a motion transmission ~ystem, and more particularly.to a planetary gear system, ln whlch the sun.wheel ant the annulus are operatively coupled by a planet wheel located on a cage structure whlch ha~ a pro~ectlng arm.
Background.
The referenced technlcal llterature deæcrlbes a planetary gear ln whlch a cage element 18 formed as a single arm on whlch a planetary wheel 1B Journalled, ln engagement with the sun gear and an internal gear of the annulus. Slnce the sun gear and the annulus have gear teeth which mesh *lth the , :
.
~ :~:
2~1~232 plahe~arygear~ lubrication at the engagement polnts of the gear teeth is necessary. If the shafts carrying the sun gear and the annulus are not ln precise alignment, difficulties arise and any misalignment can only be within the range of play between the respective gears on the planetay wheel, the sun and the annulus.
The Invent io n .
It is an ob~ect to provide a planetary gearing which requires little maintenance or service, little lubrication, and which permits misalignment of the shaft carrying the sun gear with the shaft carrying the annulus to a greater extent than heretofore posslble, while providing for better synchroni~ed operation of the respective gears.
Briefly, a flexible belt is coupled between the i~ternal gearing of the annulas and the external gearing of the sun wheel, the flexible belt being held:in engagement with the internal gear of the sun wheel by an engagement wheel which forms the planet wheel, carried by an arm of the cage. The belt i~ formed as a positive drive element, for example as a toothed or ribbed belt, to mesh with the internal gear of the annulus and the external gear of the sun wheel, or may be formed as a sprocket chain, with the respective gear teeth meshin8 or engaging with the sprocket elements of the sprocket chain;
equivalent other structures may also be used.
By using a flexible coupling element to transfer power between the sun wheel, the cage, and the annulus, the advantages of a planetary gear system can be obtained coupled with the aduan~ages of a flexible belt or chain drive.
These advantages, as far as the gear are concerned, are compact construction, and a wide spectrum of transmission possibilities ~2-.
':~
::
:
- 2~ ~232 due to the varlous combinations possible in drives of the planet gear systems; and, with respect to the flexible transmlssion belt system, high reliability wlth low service or maintenance requirements, essential insensitlvity to offsets S between shafts, or non-concentric placement of bearings, low noise, and the li~e.
Drawings:
Fig. l is a highly schematlc side view of the planet gear system in accordance with the present invention;
Fig. 2 is a schematic side view of the system of Fig. l, taken along the section line II-II of Fig. l;
Fig. 3 is a ~chematic side view similar to Fig. 2, and i` illustrating a variation of the system; and ;i Fig. 4 is a schematic front view, similar to Fig. l, . .
and illustrating another embodiment.
Detailed Deicription.
Referring first æO Figa. l and 2- A first main i shaft l carries the sun gear 2, to rotate with the shaft l.
; The sun gear 2 has an external gearlng 3 thereon.
A second main shaft 4 is positioned essentially coaxially with respect to the first main shaft l. The second shaft 4 carries an annulus 5, for rotation therewith. The ~'r annulus 5 has an lnternal gearing 6, and a substantially larger diameter than the ~un gear 2, being spaced therefrom by a ~ 25 dlstance 7 (Fig. l).
- In accordance with the present invention, the sun i~ gear 2 and the annulus 5 are ~coupled by a flexible endless belt or chain element 15. The belt element 15 which, or exam~le, -~
` is a toothed belt or gear belt, is held in engagement with -- 30 gearing 6 of the annulus 5 by planet wheels l2, l3, l4 which, ,,,, :~>, :
, .
, . , .
.~
~,. ~ : : : . : . ~: :
- 2~1~232 in turn, are located on a cage structure 8, termlnating in three arms 9, 10, 11. The planet wheels 12, 13, 14 are positioned essentially at the ends of the arms 9, 10, 11.
The cage structure is rotatable about the second shaft 4, although it could be rotatable about shaft 1 as ~ell, and ~ournalled thereon.
The periphery of the respective engagement or planet rollers 12, 1~, 14 i8 close to the inner gearing 6 of the annulus, ~ust far enough therefrom to permit passage of the flexible endless b-elt element 15 therebetween.
The belt element 15, as shown in Fig. 1, is an externally geared belt, although it could be replaced by a chain, sprocket chain or the like. The belt element 15 i8 carrled between the planet wheels 12, 14 about the sun -~
; 15 wheel 2 in form of a reverse loop, such that the external gearing on the belt 15 is in engagement wlth the teeth 3 of the sun gear 2.
In accordance with a preferred embodiment of the invention, a resilient or ad~ustable tensioning roller 18 i8 in engagement with the inside of the belt 15. It i8 held on an arm 17, pro~ecting from arm 10 of the cage element, and spring-loaded by a spring 181, shown only schematically, to provide the appropriate operating ten6ion for the belt 15.
Spring 18' preferably is ad~ustably positioned on the arm 17 or arm 10, respectively, as shown by double arrow 17'.
The drive in accordance with the present invention permits a wide variety of choices between driving elements and driven element~, in dependence upon which one of the shafts are the driving or driven shaft and if the cage 8, 9, 10, 11 is held in flxed position or not. The referenced literature as well ':
~':
.~ . : , : , ,.:,, : . . :
:~& -- : ~ . : , . ~ , 201 ~232 as many other technological dictionaries describe the various combinations of the chain of drive transmissions possible in such a system. Table l on page 593 of the referenced literature lists 12 different variations, in dependence on which one of the gear elements, the sun gear, the cage, or the annulus, form the driv~ing portion or the driven portion, or are msintained in fixed position, to thereby provide transmissions of different transmission ratios, locked transmission, or branching of rotary power.
Fig. 3, in schematic representation, illustrates an arrangement in which the cage elemant 8' is coupled to a third shaft 4', which is surrounded by a hollow shaft 19, coupled to the annulus 51. Thus, either the sun wheel 2 ', the annuluæ 5', or the cage 8' can be used, selectively, as a drive shaft, a driven shaft, or as a fixed element about which the sun and annulus will rotate. Suitable coupling elements to the shafts ; l', 4', l9 are shown only echematically since they are well known.
The structure shown in Figs. l and 3 cen be used with one, two or three engagement or planet rollers 12, 13, l4;
of course, more such rollers can be used, and the cage structure 8 can hav~ four or more arms, each one retaining a respective pressure roller planet wheel. This provides for additlonal power transfer positions between the respective `` belts l5, 15 ' (Fig. 3), the sun gear, and the annulus.Fig. 4 il~ustrates another variation of the planetary gear in accordance with the present invention. The cage l08 includes a slngle arm 109~ at the end thereof an engagement planet roller 1 ] 2 is rotatably secured. The sun gear 102 has an outer gearing l03, and it is surrounded by an annulus : 30 105 with an internal gearing ]06. The planet roller 112 is .. :
--: 20~ 232 .
~-positioned so that it i8 spaced sllghtly from the gearing 106. The arm 109 of the cage 108 additionally includes a pro;ecting link or lever 112 which carries a roller 118, to form a tension roller for the flexible transmission element 115.
~;~ 5 The roller 118 can be movably positioned on arm 117, for example by a spring or by a fixed ad~ustment element, for adjustment in accordance with the arrow 118'.
The flexible power transfer element 115 has inter- ;~
engaging coupllng elements on both sides, for example by `~ 10 being formed as a double-sided toothed or gear belt, or a sprocket chain. The belt 115 is in engagement ~ith its internal gearing or ~ith the inner portion of the sprocket chain with the outer gearing 103 of the sun wheel 102 and, with its outside, is in engagement with the inner gearing 106 of the annulus 105, .~ 15 engagement pressure being maintained by the engagement or planet wheel 1 12 .
Various arrangements are possible, to vary the use of the respective wheels as drive elements, driven elements or fixed elements, and, likewise, to use the cage element 108 ~i, 20 with the planet 112 thereon as a driving, driven, or fixed ~:' element.
The shafts ],-4 or l', 4', 19', and similar shafts coupled to the respec~ive wheels and elements of Fig. 4, and not shown therein for simplicity of the drawing, can be in alignment; the flexible belt 15, 15', 115, however, permits some misalignment of the respective ~haft~ which may be greater than the mlsalignment possible when planet gears -` are in engagement with the sun gear and the internal gear of .i; the annulus. Thus, although the~shaftsshould be aligned, it is sufficient that they are in essential alignment, the gearing .
., ~- -6-.:
;- .
/o ` 2~1232 system having the advantage of low maintenance, low noise and compact constructlon,with the additional advantage of requiring lesser tolerances in manufacture and tolerance of misalignment of shafts which ought to be aligned, coupled S with the advantages of flexibility regarding which one of the elements of the planetary system are ~he driving, driven or fixed portions.
: Various changes and modifications may be made, and any features descrlbed herein may be used with any others, within the scope of the inventive concept.
,:
, :
~' _7_ .
.
The Invent io n .
It is an ob~ect to provide a planetary gearing which requires little maintenance or service, little lubrication, and which permits misalignment of the shaft carrying the sun gear with the shaft carrying the annulus to a greater extent than heretofore posslble, while providing for better synchroni~ed operation of the respective gears.
Briefly, a flexible belt is coupled between the i~ternal gearing of the annulas and the external gearing of the sun wheel, the flexible belt being held:in engagement with the internal gear of the sun wheel by an engagement wheel which forms the planet wheel, carried by an arm of the cage. The belt i~ formed as a positive drive element, for example as a toothed or ribbed belt, to mesh with the internal gear of the annulus and the external gear of the sun wheel, or may be formed as a sprocket chain, with the respective gear teeth meshin8 or engaging with the sprocket elements of the sprocket chain;
equivalent other structures may also be used.
By using a flexible coupling element to transfer power between the sun wheel, the cage, and the annulus, the advantages of a planetary gear system can be obtained coupled with the aduan~ages of a flexible belt or chain drive.
These advantages, as far as the gear are concerned, are compact construction, and a wide spectrum of transmission possibilities ~2-.
':~
::
:
- 2~ ~232 due to the varlous combinations possible in drives of the planet gear systems; and, with respect to the flexible transmlssion belt system, high reliability wlth low service or maintenance requirements, essential insensitlvity to offsets S between shafts, or non-concentric placement of bearings, low noise, and the li~e.
Drawings:
Fig. l is a highly schematlc side view of the planet gear system in accordance with the present invention;
Fig. 2 is a schematic side view of the system of Fig. l, taken along the section line II-II of Fig. l;
Fig. 3 is a ~chematic side view similar to Fig. 2, and i` illustrating a variation of the system; and ;i Fig. 4 is a schematic front view, similar to Fig. l, . .
and illustrating another embodiment.
Detailed Deicription.
Referring first æO Figa. l and 2- A first main i shaft l carries the sun gear 2, to rotate with the shaft l.
; The sun gear 2 has an external gearlng 3 thereon.
A second main shaft 4 is positioned essentially coaxially with respect to the first main shaft l. The second shaft 4 carries an annulus 5, for rotation therewith. The ~'r annulus 5 has an lnternal gearing 6, and a substantially larger diameter than the ~un gear 2, being spaced therefrom by a ~ 25 dlstance 7 (Fig. l).
- In accordance with the present invention, the sun i~ gear 2 and the annulus 5 are ~coupled by a flexible endless belt or chain element 15. The belt element 15 which, or exam~le, -~
` is a toothed belt or gear belt, is held in engagement with -- 30 gearing 6 of the annulus 5 by planet wheels l2, l3, l4 which, ,,,, :~>, :
, .
, . , .
.~
~,. ~ : : : . : . ~: :
- 2~1~232 in turn, are located on a cage structure 8, termlnating in three arms 9, 10, 11. The planet wheels 12, 13, 14 are positioned essentially at the ends of the arms 9, 10, 11.
The cage structure is rotatable about the second shaft 4, although it could be rotatable about shaft 1 as ~ell, and ~ournalled thereon.
The periphery of the respective engagement or planet rollers 12, 1~, 14 i8 close to the inner gearing 6 of the annulus, ~ust far enough therefrom to permit passage of the flexible endless b-elt element 15 therebetween.
The belt element 15, as shown in Fig. 1, is an externally geared belt, although it could be replaced by a chain, sprocket chain or the like. The belt element 15 i8 carrled between the planet wheels 12, 14 about the sun -~
; 15 wheel 2 in form of a reverse loop, such that the external gearing on the belt 15 is in engagement wlth the teeth 3 of the sun gear 2.
In accordance with a preferred embodiment of the invention, a resilient or ad~ustable tensioning roller 18 i8 in engagement with the inside of the belt 15. It i8 held on an arm 17, pro~ecting from arm 10 of the cage element, and spring-loaded by a spring 181, shown only schematically, to provide the appropriate operating ten6ion for the belt 15.
Spring 18' preferably is ad~ustably positioned on the arm 17 or arm 10, respectively, as shown by double arrow 17'.
The drive in accordance with the present invention permits a wide variety of choices between driving elements and driven element~, in dependence upon which one of the shafts are the driving or driven shaft and if the cage 8, 9, 10, 11 is held in flxed position or not. The referenced literature as well ':
~':
.~ . : , : , ,.:,, : . . :
:~& -- : ~ . : , . ~ , 201 ~232 as many other technological dictionaries describe the various combinations of the chain of drive transmissions possible in such a system. Table l on page 593 of the referenced literature lists 12 different variations, in dependence on which one of the gear elements, the sun gear, the cage, or the annulus, form the driv~ing portion or the driven portion, or are msintained in fixed position, to thereby provide transmissions of different transmission ratios, locked transmission, or branching of rotary power.
Fig. 3, in schematic representation, illustrates an arrangement in which the cage elemant 8' is coupled to a third shaft 4', which is surrounded by a hollow shaft 19, coupled to the annulus 51. Thus, either the sun wheel 2 ', the annuluæ 5', or the cage 8' can be used, selectively, as a drive shaft, a driven shaft, or as a fixed element about which the sun and annulus will rotate. Suitable coupling elements to the shafts ; l', 4', l9 are shown only echematically since they are well known.
The structure shown in Figs. l and 3 cen be used with one, two or three engagement or planet rollers 12, 13, l4;
of course, more such rollers can be used, and the cage structure 8 can hav~ four or more arms, each one retaining a respective pressure roller planet wheel. This provides for additlonal power transfer positions between the respective `` belts l5, 15 ' (Fig. 3), the sun gear, and the annulus.Fig. 4 il~ustrates another variation of the planetary gear in accordance with the present invention. The cage l08 includes a slngle arm 109~ at the end thereof an engagement planet roller 1 ] 2 is rotatably secured. The sun gear 102 has an outer gearing l03, and it is surrounded by an annulus : 30 105 with an internal gearing ]06. The planet roller 112 is .. :
--: 20~ 232 .
~-positioned so that it i8 spaced sllghtly from the gearing 106. The arm 109 of the cage 108 additionally includes a pro;ecting link or lever 112 which carries a roller 118, to form a tension roller for the flexible transmission element 115.
~;~ 5 The roller 118 can be movably positioned on arm 117, for example by a spring or by a fixed ad~ustment element, for adjustment in accordance with the arrow 118'.
The flexible power transfer element 115 has inter- ;~
engaging coupllng elements on both sides, for example by `~ 10 being formed as a double-sided toothed or gear belt, or a sprocket chain. The belt 115 is in engagement ~ith its internal gearing or ~ith the inner portion of the sprocket chain with the outer gearing 103 of the sun wheel 102 and, with its outside, is in engagement with the inner gearing 106 of the annulus 105, .~ 15 engagement pressure being maintained by the engagement or planet wheel 1 12 .
Various arrangements are possible, to vary the use of the respective wheels as drive elements, driven elements or fixed elements, and, likewise, to use the cage element 108 ~i, 20 with the planet 112 thereon as a driving, driven, or fixed ~:' element.
The shafts ],-4 or l', 4', 19', and similar shafts coupled to the respec~ive wheels and elements of Fig. 4, and not shown therein for simplicity of the drawing, can be in alignment; the flexible belt 15, 15', 115, however, permits some misalignment of the respective ~haft~ which may be greater than the mlsalignment possible when planet gears -` are in engagement with the sun gear and the internal gear of .i; the annulus. Thus, although the~shaftsshould be aligned, it is sufficient that they are in essential alignment, the gearing .
., ~- -6-.:
;- .
/o ` 2~1232 system having the advantage of low maintenance, low noise and compact constructlon,with the additional advantage of requiring lesser tolerances in manufacture and tolerance of misalignment of shafts which ought to be aligned, coupled S with the advantages of flexibility regarding which one of the elements of the planetary system are ~he driving, driven or fixed portions.
: Various changes and modifications may be made, and any features descrlbed herein may be used with any others, within the scope of the inventive concept.
,:
, :
~' _7_ .
.
Claims (11)
1. Planetary gear system having a first shaft (1);
a second shaft (4) essentially aligned with the first shaft;
a sun gear (2) having external gearing (3) on the first shaft, and rotatable therewith;
an annulus (5) having internal gearing (6) on the second shaft, rotatable therewith, and spaced from the external gearing of the sun gear;
a cage means (8, 8', 108) rotatably journalled on one of said shafts, and including at least one cage arm (9, 10, 11;
109);
at least one planet wheel (12, 13, 14, 12', 14', 112) rotatably retained on said at least one cage arm, wherein, in accordance with the invention, the at least one planet wheel (12, 13, 14; 12', 14', 112) is located adjacent the internal gearing (6, 106) of the annulus (5, 105); and a flexible belt means (5, 15', 115) is provided, positively coupled to the external gearing (3, 103) of the sun wheel (2, 2', 102) and the internal gearing of the annulus, looped, in part, about the sun wheel and positioned between the at least one planet wheel and said internal gearing of the annulus, and held in engagement with said internal gearing of the annulus by said at least one planet wheel.
a second shaft (4) essentially aligned with the first shaft;
a sun gear (2) having external gearing (3) on the first shaft, and rotatable therewith;
an annulus (5) having internal gearing (6) on the second shaft, rotatable therewith, and spaced from the external gearing of the sun gear;
a cage means (8, 8', 108) rotatably journalled on one of said shafts, and including at least one cage arm (9, 10, 11;
109);
at least one planet wheel (12, 13, 14, 12', 14', 112) rotatably retained on said at least one cage arm, wherein, in accordance with the invention, the at least one planet wheel (12, 13, 14; 12', 14', 112) is located adjacent the internal gearing (6, 106) of the annulus (5, 105); and a flexible belt means (5, 15', 115) is provided, positively coupled to the external gearing (3, 103) of the sun wheel (2, 2', 102) and the internal gearing of the annulus, looped, in part, about the sun wheel and positioned between the at least one planet wheel and said internal gearing of the annulus, and held in engagement with said internal gearing of the annulus by said at least one planet wheel.
2. The gear system of claim 1, wherein the cage means (8, 8') includes at least three radially projecting arms (9, 10, 11);
three planet wheels (12, 13, 14; 12', 14') are provided located adjacent the internal gearing (6) of the annulus (5, 5');
and wherein the flexible belt means (15, 15') is guided in form of a loop (16) about the sun wheel (2), looped between two (12, 14; 12', 14') of said three planet wheels.
three planet wheels (12, 13, 14; 12', 14') are provided located adjacent the internal gearing (6) of the annulus (5, 5');
and wherein the flexible belt means (15, 15') is guided in form of a loop (16) about the sun wheel (2), looped between two (12, 14; 12', 14') of said three planet wheels.
3. The gear system of claim 1, wherein said flexible belt means (15, 115) comprises a gear or toothed belt.
4. The gear system of claim 1, wherein said flexible belt means (15, 115) comprises a chain means.
5. The gear system of claim 1, wherein said flexible belt means (15, 115) comprises a sprocket chain.
6. The gear system of claim 1, wherein tensioning means (17, 17', 18, 18', 117, 118, 118') are provided in engagement with said flexible belt means for deflecting said flexible belt means out of a straight-line run and for tensioning said flexible belt means.
7. The gear system of claim 6, including spring means for resiliently tensioning said flexible belt means.
8. The gear system of claim 1, including adjustment means (117, 118') for adjustably tensioning said flexible belt means.
9. The gear system of claim 6, wherein said tensioning means comprises a holding arm (17, 117) laterally projecting from said at least one cage arm (10, 109); and a roller (18, 118) movably positioned on said tensioning arm and in engagement with said flexible belt means.
10. The gear system of claim 1, wherein said flexible belt means is a toothed or gear belt having teeth on one side thereof only.
11. The gear system of claim 1, wherein said flexible belt means is a toothed or gear belt having teeth on both sides thereof, one side being in engagement with the gearing (103) of the sun wheel (102) and the other side being in engagement with the gearing (106) of the annulus (105).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3907052.2 | 1989-03-04 | ||
| DE3907052 | 1989-03-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2011232A1 true CA2011232A1 (en) | 1990-09-04 |
Family
ID=6375580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2011232 Abandoned CA2011232A1 (en) | 1989-03-04 | 1990-03-01 | Planetary gear system |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH02271144A (en) |
| CA (1) | CA2011232A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1788238A2 (en) * | 2005-11-16 | 2007-05-23 | Winwind Oy | Replaceable wear element for wind turbine blade pitch adjustment mechanism |
| US11280394B2 (en) | 2009-03-30 | 2022-03-22 | Tq-Systems Gmbh | Gear, motor-gear unit, vehicle, generator with a gear, and force transmitting element |
| US11286979B2 (en) | 2016-11-28 | 2022-03-29 | Tq-Systems Gmbh | Power transmission elements, torque measuring device and freewheel assembly |
| US11808338B2 (en) | 2013-03-20 | 2023-11-07 | Tq-Systems Gmbh | Harmonic pin ring gearing |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102365474B (en) * | 2009-03-30 | 2015-03-25 | Tq系统有限公司 | Gear, Motor-Gear Unit, Vehicle, Generator With A Gear, And Force Transmitting Element |
-
1990
- 1990-03-01 CA CA 2011232 patent/CA2011232A1/en not_active Abandoned
- 1990-03-01 JP JP4737490A patent/JPH02271144A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1788238A2 (en) * | 2005-11-16 | 2007-05-23 | Winwind Oy | Replaceable wear element for wind turbine blade pitch adjustment mechanism |
| EP1788238A3 (en) * | 2005-11-16 | 2012-11-07 | Winwind Oy | Replaceable wear element for wind turbine blade pitch adjustment mechanism |
| US11280394B2 (en) | 2009-03-30 | 2022-03-22 | Tq-Systems Gmbh | Gear, motor-gear unit, vehicle, generator with a gear, and force transmitting element |
| US11808338B2 (en) | 2013-03-20 | 2023-11-07 | Tq-Systems Gmbh | Harmonic pin ring gearing |
| US11286979B2 (en) | 2016-11-28 | 2022-03-29 | Tq-Systems Gmbh | Power transmission elements, torque measuring device and freewheel assembly |
| US11592056B2 (en) | 2016-11-28 | 2023-02-28 | Tq-Systems Gmbh | Power transmission elements, torque measuring device and freewheel assembly |
| US11781590B2 (en) | 2016-11-28 | 2023-10-10 | Tq-Systems Gmbh | Load cell for determining a radial force acting on a crankshaft |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02271144A (en) | 1990-11-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |