CA1119824A - Lubricating means for shaft couplings - Google Patents
Lubricating means for shaft couplingsInfo
- Publication number
- CA1119824A CA1119824A CA000323752A CA323752A CA1119824A CA 1119824 A CA1119824 A CA 1119824A CA 000323752 A CA000323752 A CA 000323752A CA 323752 A CA323752 A CA 323752A CA 1119824 A CA1119824 A CA 1119824A
- Authority
- CA
- Canada
- Prior art keywords
- coupling
- sleeve
- lubricant
- teeth
- hub
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- F16N—LUBRICATING
- F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
- F16N7/12—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with feed by capillary action, e.g. by wicks
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/18—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts the coupling parts (1) having slidably-interengaging teeth
- F16D3/185—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts the coupling parts (1) having slidably-interengaging teeth radial teeth connecting concentric inner and outer coupling parts
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2300/00—Special features for couplings or clutches
- F16D2300/06—Lubrication details not provided for in group F16D13/74
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
- Mechanical Operated Clutches (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Abstract An improved gear coupling for connecting a pair of substantially coaxially aligned rotatable shafts comprising a hub having outwardly extending spur year teeth projecting from a portion of the outer surface thereof con-nected to each of the rotatable shafts; a sleeve surrounding and radially spaced from each of said hubs, each sleeve having inwardly extending spur gear teeth in meshing engagement with the teeth on said hub and a low density re-ticulated polyurethane foam extending circumferentially within said sleeves for releasing lubricant by reason of centrifugal action when the coupling is rotated and retaining the lubricant when the coupling is at rest.
Description
..
~ackground of the Invention 1. Field of Invention This invention relates generally to lubricated shaft couplings for connecting a pair of substantially coaxially aligned rotatable shafts and, nlore particularly, to gear couplings ilaving means for releasing lubricant to t~le gear teeth wilen the coupling is rotating and retaining the lubricant when the coupling is at rest.
I . I
escription of the Prior Art Typical flexible gear couplings such as those illustrated in Fasl u.
;~ 10 Patellt i~o. 1,3~6,~60 have meshing gear teeth and it is essential that the gear I teeth be well lubricated during rotation of the coupling to prevent wear of the gear teeth. Even in other more recent designs of shaft couplings, lubri-cation is necessary. One such other design employs a spring steel band woven between two slotted hubs, as described in u.S~ Patent ~o. 2,643,529.
~ 2 ~
Typically, gear couplings include two coupling halves, one of which is installed on each of the rotatable shafts with the sleeves bolted together to form the completed couplino.
During assembly the halves of the couplings are opened and it ~g difficult to retain lubricant, especially a liquid lubricant, within the coupling half. It has been found in practice that often times this loss of lubricant during assembly goes unnoticed, resulting in premature wear. Further, it has been found that lubricant can and does escape where the sleeves of the half couplings are connected. In addition, dirt enters the couplings at this connection and compromises the effectiveness of the lubri-cant.
Various sealing means, including elastomer seals, have been proposed to eliminate the problem of lubrican leakage and dirt infiltration. It has been found that these designs have certain disadvantages. In these designs grease rather than a liquid is used as the lubricant. Grease necessarily contains fillers and these fillers centrifuge into the area of the coupling requiring lubrication. secause of this centrifuging of the fillers, the oil in the grease can be prevented from entering the very area where lubrication is most needed. Also, experiments have shown that the elastomer seals can take a permanent set which produces an opening through which the grease is pumped out under misalign-ment conditions.
The present invention overcomes the foregoing problems of the prior art by providing a lubricant reservoir means which
~ackground of the Invention 1. Field of Invention This invention relates generally to lubricated shaft couplings for connecting a pair of substantially coaxially aligned rotatable shafts and, nlore particularly, to gear couplings ilaving means for releasing lubricant to t~le gear teeth wilen the coupling is rotating and retaining the lubricant when the coupling is at rest.
I . I
escription of the Prior Art Typical flexible gear couplings such as those illustrated in Fasl u.
;~ 10 Patellt i~o. 1,3~6,~60 have meshing gear teeth and it is essential that the gear I teeth be well lubricated during rotation of the coupling to prevent wear of the gear teeth. Even in other more recent designs of shaft couplings, lubri-cation is necessary. One such other design employs a spring steel band woven between two slotted hubs, as described in u.S~ Patent ~o. 2,643,529.
~ 2 ~
Typically, gear couplings include two coupling halves, one of which is installed on each of the rotatable shafts with the sleeves bolted together to form the completed couplino.
During assembly the halves of the couplings are opened and it ~g difficult to retain lubricant, especially a liquid lubricant, within the coupling half. It has been found in practice that often times this loss of lubricant during assembly goes unnoticed, resulting in premature wear. Further, it has been found that lubricant can and does escape where the sleeves of the half couplings are connected. In addition, dirt enters the couplings at this connection and compromises the effectiveness of the lubri-cant.
Various sealing means, including elastomer seals, have been proposed to eliminate the problem of lubrican leakage and dirt infiltration. It has been found that these designs have certain disadvantages. In these designs grease rather than a liquid is used as the lubricant. Grease necessarily contains fillers and these fillers centrifuge into the area of the coupling requiring lubrication. secause of this centrifuging of the fillers, the oil in the grease can be prevented from entering the very area where lubrication is most needed. Also, experiments have shown that the elastomer seals can take a permanent set which produces an opening through which the grease is pumped out under misalign-ment conditions.
The present invention overcomes the foregoing problems of the prior art by providing a lubricant reservoir means which
- 2~-release lubricant dur~ng rotation of the coupling and retains a larger volume of lu~r~cant when the coupling is at rest. The present in~ention permits the use of a liquid lubricant with the attendant advantages of this type of lubricant. Also, the lubricant reservoir can be easily replaced if lt were to become contaminated.
Specifically, this invention prov.ides a gear coupling for connecting a pair of substantially coaxially aligned rotatable shafts including a hub having outwardly extending gear teeth and a sleeve surrounding and radially spaced from said hub, said sleeve having inwardly extending gear teeth in meshing engagement with the teeth on said hub, the improvement comprising a liquid lubricant reservoir means extending circumferentially within said sleeve, at the maximum diameter thereof said reservoir means adapted to absorb lubricant when said coupling is at rest and release lubricant when said coupling is rotating~
- 2a t3 2 4 ~ C~)tiOII ~f the ~rawings Fig. 1 is a front elevd~ional view partly in section of a typical gear coupliny including the inverltion of the present application.
~escri tion ~f the Preferred ~mbodiment P
Referring to the figure the gear coupling is designated generally as 1~ and the left half as 12 and.the right half as 14. It will be under-stood t~at each llalf of tne coupling is identical and thus only the left half will be described but identical parts on the right side will bear identical reference numerals. Coupling half 12 includes a hub 16 and sleeve 18. The outer sealing ring of the coupling is generally designated as 20. Hub 16 is keyed to shaft ~2 by means of a conventional key and keyway arrangement. Hub 1o includes conventional outwardly extending external gear teeth 24.
Sleeve 1~ surrounds hub 16 and has radially extending internal gear teeth ~6 which mesh in a well-known manner with hub teeth 24. Sleeve teeth 26 are preferably axially longer than llub teeth 24 to permit the hub teeth to move axially witnout bècoming disengaged. Sleeve 1~ is integral with flange ~2 which is rigidly connected to a similar flange on the sleeve in the right coupling half by a fastener 30 such as a bolt. Within sleeve 18 is a cylin-drical low d~nsity reticulated foam cylinder 34. Cylinder 34 is manufactured so that all membranes are virtually eliminated from the conventional strand.
The cylinder can retain lubricant placed in the coupling half when it is at rest and release it under centrifugal force when the coupling is rotating.
lhe improv~d lubricant reservoir 34 can also be used in a coupling of this rype wherein the sleeve 18 of coupling half 12 may be mounted on a flange 2~ whicrl is secure~ to shaft 36.
The reticulated low density foam cylinder 34 may also be incorpo-rated into conventional gearless type couplings. While we have described certaill preferred embodimellts of our invention it will be understood that the inventi~n may otnerwise be embodied within the scope of the following claims.
Specifically, this invention prov.ides a gear coupling for connecting a pair of substantially coaxially aligned rotatable shafts including a hub having outwardly extending gear teeth and a sleeve surrounding and radially spaced from said hub, said sleeve having inwardly extending gear teeth in meshing engagement with the teeth on said hub, the improvement comprising a liquid lubricant reservoir means extending circumferentially within said sleeve, at the maximum diameter thereof said reservoir means adapted to absorb lubricant when said coupling is at rest and release lubricant when said coupling is rotating~
- 2a t3 2 4 ~ C~)tiOII ~f the ~rawings Fig. 1 is a front elevd~ional view partly in section of a typical gear coupliny including the inverltion of the present application.
~escri tion ~f the Preferred ~mbodiment P
Referring to the figure the gear coupling is designated generally as 1~ and the left half as 12 and.the right half as 14. It will be under-stood t~at each llalf of tne coupling is identical and thus only the left half will be described but identical parts on the right side will bear identical reference numerals. Coupling half 12 includes a hub 16 and sleeve 18. The outer sealing ring of the coupling is generally designated as 20. Hub 16 is keyed to shaft ~2 by means of a conventional key and keyway arrangement. Hub 1o includes conventional outwardly extending external gear teeth 24.
Sleeve 1~ surrounds hub 16 and has radially extending internal gear teeth ~6 which mesh in a well-known manner with hub teeth 24. Sleeve teeth 26 are preferably axially longer than llub teeth 24 to permit the hub teeth to move axially witnout bècoming disengaged. Sleeve 1~ is integral with flange ~2 which is rigidly connected to a similar flange on the sleeve in the right coupling half by a fastener 30 such as a bolt. Within sleeve 18 is a cylin-drical low d~nsity reticulated foam cylinder 34. Cylinder 34 is manufactured so that all membranes are virtually eliminated from the conventional strand.
The cylinder can retain lubricant placed in the coupling half when it is at rest and release it under centrifugal force when the coupling is rotating.
lhe improv~d lubricant reservoir 34 can also be used in a coupling of this rype wherein the sleeve 18 of coupling half 12 may be mounted on a flange 2~ whicrl is secure~ to shaft 36.
The reticulated low density foam cylinder 34 may also be incorpo-rated into conventional gearless type couplings. While we have described certaill preferred embodimellts of our invention it will be understood that the inventi~n may otnerwise be embodied within the scope of the following claims.
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS::
1. A gear coupling for connecting a pair of substantially coaxially aligned rotatable shafts including a hub having outwardly extending gear teeth and a sleeve surrounding and radially spaced from said hub, said sleeve having inwardly extending gear teeth in meshing engagement with the teeth on said hub, the improvement comprising:
a liquid lubricant reservoir means extending circum-ferentially within said sleeve at the maximum diameter thereof, said reservoir means adapted to absorb lubricant when said coupling is at rest and release lubricant when said coupling is rotating.
a liquid lubricant reservoir means extending circum-ferentially within said sleeve at the maximum diameter thereof, said reservoir means adapted to absorb lubricant when said coupling is at rest and release lubricant when said coupling is rotating.
2. The gear coupling of Claim 1 wherein said liquid lubricant reservoir means is a low density reticulated foam.
3. A gear coupling for connecting a pair of substantially coaxially aligned rotatable shafts including a hub having outwardly extending gear teeth operably fixed to each of said shafts and sleeve means surrounding and radially spaced from said hubs, said sleeve means having inwardly extending gear teeth in meshing engagement with the teeth of said hubs, the improvement comprising:
a liquid lubricant reservoir means extending circum-ferentially within said sleeve at the maximum diameter thereof, said reservoir means adapted to absorb lubricant when said coupling is at rest and release lubricant when said coupling is rotating.
a liquid lubricant reservoir means extending circum-ferentially within said sleeve at the maximum diameter thereof, said reservoir means adapted to absorb lubricant when said coupling is at rest and release lubricant when said coupling is rotating.
4. The gear coupling of Claim 3 wherein said liquid lubricant reservoir means is a low-density reticulated foam.
5. The gear coupling of Claim 4 wherein each of said reservoir means is cylindrical in cross section in a plane substantially perpendicular to the axis of rotation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US88833378A | 1978-03-20 | 1978-03-20 | |
| US888,333 | 1978-03-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1119824A true CA1119824A (en) | 1982-03-16 |
Family
ID=25392991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000323752A Expired CA1119824A (en) | 1978-03-20 | 1979-03-19 | Lubricating means for shaft couplings |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS54130760A (en) |
| AU (1) | AU4524779A (en) |
| BR (1) | BR7901728A (en) |
| CA (1) | CA1119824A (en) |
| DE (1) | DE2910781A1 (en) |
| FR (1) | FR2420686A1 (en) |
| GB (1) | GB2016648A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4911678A (en) * | 1988-07-19 | 1990-03-27 | Renold, Inc. | Labyrinth seal coupling |
| WO2006087785A1 (en) * | 2005-02-17 | 2006-08-24 | Mitsubishi Denki Kabushiki Kaisha | Gear coupling |
| DE102014204590A1 (en) * | 2014-03-12 | 2015-09-17 | Siemens Aktiengesellschaft | gear coupling |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2332068A (en) * | 1941-02-10 | 1943-10-19 | Christiane Ganna Fast | Coupling |
| GB787785A (en) * | 1955-01-07 | 1957-12-18 | Demag Zug Gmbh | Shaft coupling |
| US3190842A (en) * | 1960-08-11 | 1965-06-22 | Gen Electric | Preparation of open cell polyurethane foam having an inert liquid entrapped therein |
| GB1000914A (en) * | 1963-08-13 | 1965-08-11 | Stone Wallwork Ltd | Improvements relating to flexible couplings |
| US3296830A (en) * | 1965-01-08 | 1967-01-10 | Bendix Corp | Universal joint |
| GB1461935A (en) * | 1973-10-18 | 1977-01-19 | Gen Electric | Lubricant composition and wicking material therefor |
-
1979
- 1979-03-19 AU AU45247/79A patent/AU4524779A/en not_active Abandoned
- 1979-03-19 DE DE19792910781 patent/DE2910781A1/en not_active Withdrawn
- 1979-03-19 CA CA000323752A patent/CA1119824A/en not_active Expired
- 1979-03-20 JP JP3313279A patent/JPS54130760A/en active Pending
- 1979-03-20 FR FR7907026A patent/FR2420686A1/en not_active Withdrawn
- 1979-03-20 BR BR7901728A patent/BR7901728A/en unknown
- 1979-03-20 GB GB7909651A patent/GB2016648A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR2420686A1 (en) | 1979-10-19 |
| DE2910781A1 (en) | 1979-09-27 |
| GB2016648A (en) | 1979-09-26 |
| AU4524779A (en) | 1979-09-27 |
| JPS54130760A (en) | 1979-10-11 |
| BR7901728A (en) | 1979-11-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |