WO2005108810A2 - Improved torque overload clutch - Google Patents
Improved torque overload clutch Download PDFInfo
- Publication number
- WO2005108810A2 WO2005108810A2 PCT/US2005/014754 US2005014754W WO2005108810A2 WO 2005108810 A2 WO2005108810 A2 WO 2005108810A2 US 2005014754 W US2005014754 W US 2005014754W WO 2005108810 A2 WO2005108810 A2 WO 2005108810A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- driving
- inner member
- members
- outer member
- torque
- Prior art date
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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
- F16D7/04—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type
- F16D7/048—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type with parts moving radially between engagement and disengagement
-
- 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
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/20—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure
- F16D43/202—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure of the ratchet type
- F16D43/2028—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure of the ratchet type with at least one part moving radially between engagement and disengagement
Definitions
- the clutch has an outer member and an inner member, and three detents between the inner member and the outer member that maintain the members in rotational driving engagement with one another below a certain overload torque between them.
- Each detent includes a driving member that slides radially in an opening in the inner member between an engaged position in which the driving member is seated in a recess of the outer member in driving engagement with the recess and " a disengaged position in which the driving member is retracted from the recess and the outer member is continuously rotatable relative to the inner member.
- the driving members are moved radially outward to engage in the recesses by a mechanism including a disc spring that exerts an axial spring force that biases the driving members into the engaged position, and the disc spring is regressive so that the spring force it exerts is less in the disengaged position than it is in the engaged position.
- a mechanism including a disc spring that exerts an axial spring force that biases the driving members into the engaged position, and the disc spring is regressive so that the spring force it exerts is less in the disengaged position than it is in the engaged position.
- a radial detent torque overload clutch of the invention has a retaining ring inside the outer housing to retain the hub and pawls axially in the housing. This results in constructional changes that permit the above described advantages.
- a thrust bearing is provided between the ring and pawls to bear thrust loads against an axially facing surface of the inner member that tend to pull the hub out of the housing. This helps protect the springs from excessive thrust loads as the thrust bearing will bear them to improve durability of the clutch.
- the pawls exert driving torque in only one direction. In the other direction, the hub can be turned manually relative to the " housing by the pawls camming on- gently sloped surfaces of the housing. When a pawl reaches one of the driving engagement surfaces when sliding in this direction, the pawl overruns it and keeps going, producing a chattering sound to let the operator know that the clutch is overrunning in the opposite direction..
- Fig. 1 is a side plan view of a coupler employing a preferred embodiment of a torque limiting clutch of the present invention
- Fig. 2 is a sectional view of the coupler illustrated in Fig.
- Fig. 3 is an exploded assembly view of the coupler;
- Fig. 4 is a sectional view from the plane of the line 4-4 of Fig. 2 of the clutch in an engaged position; and
- Fig. 5 is a view like Fig. 4, but with the clutch in a disengaged position.
- a torque overload clutch 10 of the invention has a yoke 12 fixed, for example by welding, to an outer housing 14.
- An inner hub 16 that is rotatable relative to the professionyoke and housing has its inner end 18 contained within the housing 14 and its outer end is internally splined to receive a splined shaft.
- Each pawl 20 is a driving member that has a ramped surface 24 that cams on a mating ramped surface 26 of an actuator ring 28.
- the actuator ring 28 is biased axially toward the pawls 20 by a spring made up of three disc springs 30, that has a regressive spring rate as described in U.S.
- a ring shaped thrust bearing 32 is positioned inside the housing 14, outside of the actuator ring 28 and between the outer ends of the pawls 20 and the axially inner side of a split retainer ring 34 that is snapped into an internal groove 36 in the housing 14.
- the thrust bearing bears on the adjacent axially facing surface of end 18 on its left side as viewed in Fig. 2, and on the ring 34 on its right side if the inner member 16 is attempted to be pulled out of the outer member 14.
- the retainer 34 captures the end 18 and the pawls 20 inside of the housing 14 and reacts against any excessive thrust loads the hub 16 exerts on the housing 14, that tend to pull the hub 16 axially out of the housing 14.
- each pawl 20 has a steeply ramped outer corner that is engaged with a mating steeply ramped surface 50 formed in the interior surface of the housing 14. If a torque is exerted on the hub 16 to drive the yoke 12 in the clockwise direction as viewed in Fig. 4, the torque is exerted from the hub 16, through the pawls 20 bearing on the surfaces 50 to the housing 14 and therefore, since the housing is fixed to the yoke 12, to the yoke 12. If the torque capacity of the clutch 10 is exceeded, the pawls 20 cam on the surfaces 50 and are pushed radially inwardly.
- the pawls 20 cam on the ramped surface 26 of the ring 28, which urges the ring 28 axially away from the pawls 20 against the bias of the disc springs 30, permitting relative rotation of the hub 16 and housing 14 when the pawls 20 disengage from the surfaces 50.
- a pawl 20 passes a surface 50 as the hub 16 and housing 14 relatively rotate, it attempts to re-engage, producing a chattering noise.
- the re-engagement attempts are successful, arresting relative rotation between the hub 16 and housing 14, to once again transmit torque from the hub 16 to the housing 14.
- Significant torque is only transmissible in one rotary direction in the clutch 10.
- Torque may be transmitted from the hub 16 to the housing 14 in this direction, or from the housing 14 to the hub 16.
- each pawl can slide on a surface 52 that slopes gently radially inwardly to the diameter of the inside diameter surfaces 54 of the cam race surface in the bore 45 of the housing 14, as illustrated in Fig. 5, so that they are in the fully disengaged position on the surfaces 54.
- the slope is gentle, meaning that it is such that manual force can be exerted to turn the housing 14 and hub 16 relatively in this direction:
- the surface ramps inwardly for somewhat more than 45°, whereas the surfaces 50 traverse the same radial distance in very few degrees. This permits the hub 16 to be turned relative to the housing 14 in this direction (moving the pawls 20 away from the surfaces 50) with the application of a relatively low torque, in comparison to the torque capacity in the driving direction.
- the yoke 12 could be replaced with a sprocket for a chain drive application, or a gear for a gear drive application, and the sprocket or gear could have a hole through the center that would allow a shaft to be inserted through it, so the shaft could be inserted through the clutch and the sprocket or gear.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
- Lubricants (AREA)
- Measurement Of Force In General (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05741201A EP1751442B1 (en) | 2004-05-03 | 2005-04-28 | Improved torque overload clutch |
DE602005022700T DE602005022700D1 (en) | 2004-05-03 | 2005-04-28 | IMPROVED TORQUE OVERLOAD COUPLING |
AT05741201T ATE476608T1 (en) | 2004-05-03 | 2005-04-28 | IMPROVED TORQUE OVERLOAD CLUTCH |
CA2565132A CA2565132C (en) | 2004-05-03 | 2005-04-28 | Improved torque overload clutch |
US11/579,161 US7794329B2 (en) | 2004-05-03 | 2005-04-28 | Torque overload clutch |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US56770104P | 2004-05-03 | 2004-05-03 | |
US60/567,701 | 2004-05-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005108810A2 true WO2005108810A2 (en) | 2005-11-17 |
WO2005108810A3 WO2005108810A3 (en) | 2006-09-08 |
Family
ID=35320826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2005/014754 WO2005108810A2 (en) | 2004-05-03 | 2005-04-28 | Improved torque overload clutch |
Country Status (6)
Country | Link |
---|---|
US (1) | US7794329B2 (en) |
EP (2) | EP1751442B1 (en) |
AT (2) | ATE535724T1 (en) |
CA (1) | CA2565132C (en) |
DE (1) | DE602005022700D1 (en) |
WO (1) | WO2005108810A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011057677A1 (en) * | 2009-11-16 | 2011-05-19 | Tecpharma Licensing Ag | Administering device having overload protection during dose adjustment |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007051244A1 (en) * | 2007-10-26 | 2009-04-30 | Deere & Company, Moline | transmission assembly |
EP2136095B1 (en) * | 2008-06-20 | 2011-08-17 | GKN Walterscheid GmbH | Coupling for limiting rotational movement |
US8672110B2 (en) * | 2010-09-29 | 2014-03-18 | Actuant Corporation | Automatic torque overload clutch |
US9297424B2 (en) * | 2014-04-03 | 2016-03-29 | GM Global Technology Operations LLC | Driveshaft assembly with torque control mechanism |
US9951857B2 (en) * | 2014-08-05 | 2018-04-24 | Schaeffler Technologies AG & Co. KG | Torque transmitting assembly including a sprocket assembly displaceable along a shaft and method thereof |
WO2018017512A1 (en) * | 2016-07-19 | 2018-01-25 | Actuant Corporation | Clutch assembly |
CA3055554A1 (en) | 2017-03-06 | 2018-09-13 | Joy Global Underground Mining Llc | Chain conveyor and link for same |
CA3146838A1 (en) | 2021-01-28 | 2022-07-28 | Joy Global Underground Mining Llc | Chain conveyor and link for same |
CN114473967A (en) * | 2022-01-21 | 2022-05-13 | 永康市皇冠电动工具制造有限公司 | Electric tool |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6447397B1 (en) | 2000-10-13 | 2002-09-10 | Weasler Engineering, Inc. | Detent torque overload clutch |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1126219A (en) * | 1913-12-29 | 1915-01-26 | Albert Hupp | Shaft-coupling. |
US2493232A (en) * | 1945-09-08 | 1950-01-03 | Adiel Y Dodge | Coupling |
SU497429A1 (en) * | 1974-07-26 | 1975-12-30 | Киевский Ордена Ленина Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции | Friction clutch |
SU737682A1 (en) | 1977-11-01 | 1980-05-30 | За витель и А. П. Ишанов | Safety coupling |
IT1308292B1 (en) * | 1999-07-29 | 2001-12-10 | Edi Bondioli | TRANSMISSION JOINT AND TORQUE LIMITER SUITABLE FOR ENGAGING ENGINE AND DUCTS ALWAYS IN A SINGLE ANGULAR POSITION. |
DE10002748B4 (en) * | 2000-01-22 | 2006-05-18 | Robert Bosch Gmbh | Hand tool with a safety clutch |
DE10348068A1 (en) * | 2003-10-13 | 2005-05-25 | Gkn Walterscheid Gmbh | Clutch for torque limitation |
-
2005
- 2005-04-28 WO PCT/US2005/014754 patent/WO2005108810A2/en active Application Filing
- 2005-04-28 AT AT10006056T patent/ATE535724T1/en active
- 2005-04-28 US US11/579,161 patent/US7794329B2/en not_active Expired - Fee Related
- 2005-04-28 AT AT05741201T patent/ATE476608T1/en not_active IP Right Cessation
- 2005-04-28 CA CA2565132A patent/CA2565132C/en not_active Expired - Fee Related
- 2005-04-28 EP EP05741201A patent/EP1751442B1/en not_active Not-in-force
- 2005-04-28 DE DE602005022700T patent/DE602005022700D1/en active Active
- 2005-04-28 EP EP10006056A patent/EP2221495B1/en not_active Not-in-force
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6447397B1 (en) | 2000-10-13 | 2002-09-10 | Weasler Engineering, Inc. | Detent torque overload clutch |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011057677A1 (en) * | 2009-11-16 | 2011-05-19 | Tecpharma Licensing Ag | Administering device having overload protection during dose adjustment |
Also Published As
Publication number | Publication date |
---|---|
ATE535724T1 (en) | 2011-12-15 |
WO2005108810A3 (en) | 2006-09-08 |
ATE476608T1 (en) | 2010-08-15 |
US20080214313A1 (en) | 2008-09-04 |
US7794329B2 (en) | 2010-09-14 |
EP2221495A1 (en) | 2010-08-25 |
EP1751442A4 (en) | 2007-05-23 |
CA2565132A1 (en) | 2005-11-17 |
CA2565132C (en) | 2012-06-12 |
EP1751442A2 (en) | 2007-02-14 |
DE602005022700D1 (en) | 2010-09-16 |
EP1751442B1 (en) | 2010-08-04 |
EP2221495B1 (en) | 2011-11-30 |
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