US20160298702A1 - Wedge friction one-way clutch with controllable clutch locking function - Google Patents
Wedge friction one-way clutch with controllable clutch locking function Download PDFInfo
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- US20160298702A1 US20160298702A1 US14/683,619 US201514683619A US2016298702A1 US 20160298702 A1 US20160298702 A1 US 20160298702A1 US 201514683619 A US201514683619 A US 201514683619A US 2016298702 A1 US2016298702 A1 US 2016298702A1
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- Prior art keywords
- piston
- wedge
- wedge plate
- clutch
- circumferential direction
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- 239000012530 fluid Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 11
- 230000004044 response Effects 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 4
- 230000003750 conditioning effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- 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
- F16D41/00—Freewheels or freewheel clutches
- F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
- F16D41/063—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by moving along the inner and the outer surface without pivoting or rolling, e.g. sliding wedges
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- 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
- F16D15/00—Clutches with wedging balls or rollers or with other wedgeable separate clutching members
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- 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
- F16D25/00—Fluid-actuated clutches
- F16D25/06—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch
- F16D25/062—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces
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- 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
- F16D41/00—Freewheels or freewheel clutches
- F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
- F16D41/08—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action
- F16D41/082—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action the intermediate coupling members wedging by movement other than pivoting or rolling
Definitions
- the present invention relates generally to a wedge friction clutch with controllable clutch locking function.
- the clutch includes a wedge plate and a piston arrangement that enables operation of the clutch independent of rotation of inner and outer races for the clutch.
- Wedge friction clutches typically include inner and outer races and a wedge plate disposed between the inner and outer races. It is known to engage and disengage such clutches according to the relative rotation of the inner and outer races. However, such an arrangement limits controllability of the clutches. For instance, engaging and disengaging can only be accomplished for specific relative rotation combinations.
- a wedge friction clutch with controllable clutch locking function having an axis of rotation, an inner race, an outer race located radially outward of the inner race, and, a wedge assembly including a wedge plate located between the inner and outer races in a radial direction, a first piston arranged to displace the wedge plate in a first circumferential direction, and, a second piston arranged to displace the wedge plate in a second circumferential direction, opposite the first circumferential direction.
- a wedge friction clutch with controllable clutch locking function having an axis of rotation, an outer race, an inner race located radially inward of the outer race and including an extended portion extending furthest in a radial direction toward the outer race, and, an inner circumference
- a wedge assembly including a wedge plate located between the inner and outer races in the radial direction and including first and second chambers connected to the inner circumference by first and second through-bores, respectively, and, first and second circumferential ends, and, a first piston housed in the first chamber and arranged to displace in a first circumferential direction to engage the first circumferential end to displace the wedge plate in the first circumferential direction to initiate a locked mode in which the inner and outer races are non-rotatably connected, and, a second piston housed in the second chamber and arranged to be displaced in a second circumferential direction, opposite the first circumferential direction, to engage the second circumferential end to displace the wedge plate in the
- a method of operating a wedge clutch including an axis of rotation, an inner race, an outer race located radially outward of the inner race, and a wedge assembly including a first piston, a second piston, and a wedge plate located between the inner and outer races, the method having the steps of displacing the wedge plate in a first circumferential direction with the first piston, non-rotatably connecting the inner and outer races and the wedge plate, displacing the wedge plate in a second circumferential direction, opposite the first circumferential direction, with the second piston, and, separating, in a radial direction, respective surfaces of the inner and outer races and the wedge plate to enable independent rotation of the inner and outer races.
- FIG. 1 is a perspective view of a cylindrical coordinate system demonstrating spatial terminology used in the present application
- FIG. 2 is a front view of a wedge clutch with the controllable clutch locking function
- FIG. 3 is a perspective front view of the wedge clutch of FIG. 2 ;
- FIG. 4 is a cross-sectional view of the inner race of FIG. 2 along a plane orthogonal to an axis of rotation for the clutch;
- FIG. 5 is a cross-sectional view of the inner race and wedge plate of FIG. 2 along a plane orthogonal to an axis of rotation for the clutch;
- FIG. 6 is a fragmentary schematic view showing the connection of the wedge clutch to an oil circuit.
- FIG. 1 is a perspective view of cylindrical coordinate system 10 demonstrating spatial terminology used in the present application.
- System 10 includes longitudinal axis 11 , used as the reference for the directional and spatial terms that follow.
- Axial direction AD is parallel to axis 11 .
- Radial direction RD is orthogonal to axis 11 .
- Circumferential direction CD is defined by an endpoint of radius R (orthogonal to axis 11 ) rotated about axis 11 .
- An axial surface, such as surface 15 of object 12 is formed by a plane co-planar with axis 11 .
- Axis 11 passes through planar surface 15 ; however any planar surface co-planar with axis 11 is an axial surface.
- a radial surface, such as surface 16 of object 13 is formed by a plane orthogonal to axis 11 and co-planar with a radius, for example, radius 17 .
- Radius 17 passes through planar surface 16 ; however any planar surface co-planar with radius 17 is a radial surface.
- Surface 18 of object 14 forms a circumferential, or cylindrical, surface. For example, circumference 19 passes through surface 18 .
- axial movement is parallel to axis 11
- radial movement is orthogonal to axis 11
- circumferential movement is parallel to circumference 19 .
- Rotational movement is with respect to axis 11 .
- the adverbs “axially,” “radially,” and “circumferentially” refer to orientations parallel to axis 11 , radius 17 , and circumference 19 , respectively.
- an axially disposed surface or edge extends in direction AD
- a radially disposed surface or edge extends in direction R
- a circumferentially disposed surface or edge extends in direction CD.
- FIG. 2 is a front view of wedge friction clutch 100 with controllable clutch locking function.
- FIG. 3 is a perspective front view of wedge friction clutch 100 of FIG. 2 .
- FIG. 4 is a cross-sectional view of the inner race of FIG. 2 along a plane orthogonal to an axis of rotation for the clutch.
- FIG. 5 is a cross-sectional view of the inner race and wedge plate of FIG. 2 along a plane orthogonal to an axis of rotation for the clutch. The following should be viewed in light of FIGS. 2 through 5 .
- Wedge friction clutch 100 includes: axis of rotation AR; inner race 102 ; outer race 104 located radially outward of inner race 102 , for example in radial direction RD; and wedge assembly 106 .
- Wedge assembly 106 includes wedge plate 108 located between races 102 and 104 in radial direction RD, piston 110 and piston 112 .
- piston 110 is arranged to displace wedge plate 108 in circumferential direction CD 1 .
- piston 112 is arranged to displace wedge plate 108 in circumferential direction CD 2 , opposite circumferential direction CD 1 .
- Inner race 102 includes radially outermost surface 114 .
- Outer race 104 includes radially innermost surface 116 .
- Wedge plate 108 includes radially outermost surface 118 (labeled in FIG. 3 ) and radially innermost surface 120 .
- outer race 104 has rivet points 121 circumferentially displaced from each other to attach to a component that can either drive race 104 or be driven by race 104 .
- Inner race 102 includes portion 122 extending furthest in radial direction RD toward outer race 104 .
- Portion 122 has chambers 124 and 126 .
- Piston 110 is housed in chamber 124 .
- Piston 112 is housed in chamber 126 .
- Inner race 102 also includes through-bore 128 including end 130 open to inner circumference 132 of the inner race, and end 134 open to chamber 124 .
- Inner race 102 includes gap 136 to mesh with a component that can either drive inner race 102 or be driven by inner race 102 .
- Inner race 102 includes through-bore 138 having end 140 open to inner circumference 132 of the inner race, and end 142 open to chamber 126 .
- fluid is supplied to chamber 124 through through-bore 128 to displace piston 110 in circumferential direction CM so that piston 110 displaces wedge plate 108 in direction CD 1 . Further, fluid is drained from chamber 126 through through-bore 138 so that piston 112 retracts into chamber 126 in direction CD 1 .
- fluid is supplied to chamber 126 through through-bore 138 to displace piston 112 in circumferential direction CD 2 so that piston 112 displaces wedge plate 108 in direction CD 2 . Further, as wedge plate 108 displaces in direction CD 2 , the wedge plate pushes piston 110 so that fluid is drained from chamber 124 through through-bore 128 and piston 110 retracts into chamber 124 in direction CD 2 .
- fluid is supplied to chamber 124 through through-bore 128 to displace piston 110 in circumferential direction CD 1 so that piston 110 displaces wedge plate 108 in direction CD 1 . Further, as wedge plate 108 displaces in direction CD 1 , the wedge plate pushes piston 112 so that fluid is drained from chamber 126 through through-bore 138 and piston 112 retracts into chamber 126 in direction CD 1 .
- Wedge plate 108 includes circumferential ends 144 and 146 .
- Dimension D 1 of wedge plate 108 in radial direction RD, decreases moving from end 144 toward end 146 in direction CD 1 . That is, a radial extent of wedge plate 108 tapers in direction CD 1 .
- Inner race 102 includes portions 148 and 150 radially aligned with ends 144 and 146 , respectively.
- Dimension D 2 of the inner race, in radial direction RD increases moving from portion 148 toward portion 150 in direction CD 1 .
- Line L in direction CD 1 or CD 2 , passes through portion 122 and circumferential ends 144 and 146 .
- no portion of wedge assembly 106 extends beyond race 102 or race 104 in opposite axial directions AD 1 or AD 2 .
- FIG. 6 is a fragmentary schematic view showing the connection of the wedge clutch to hydraulic circuit 152 .
- hydraulic circuit 152 is a four-way, two position, direct solenoid-operated, spring-return control valve that controls pistons 110 and 112 .
- Valve 152 has high-pressure branch 154 and low-pressure branch 156 .
- spool 158 When the clutch is in locked mode, spool 158 is in a position connecting chamber 124 to high-pressure branch 154 and chamber 126 to low-pressure branch 156 with port pair 160 .
- fluid flows from high-pressure branch 154 through through-bore 128 and into chamber 124 .
- This fluid supply increases the pressure in chamber 124 , which causes piston 110 to extend away from portion 122 of the inner race and displace wedge plate 108 in circumferential direction CD 1 .
- fluid Also in this position, fluid flows from chamber 126 through through-bore 138 and into low-pressure branch 156 . This fluid loss decreases the pressure in chamber 126 , which causes piston 112 to retract into cavity 126 towards portion 122 of the inner race.
- spool 158 When the clutch is in free-wheel mode, spool 158 is in a position connecting chamber 126 to high-pressure branch 154 and chamber 124 to low-pressure branch 156 with port pair 162 . In this position, fluid flows from high-pressure branch 154 through through-bore 138 and into chamber 126 . This fluid supply increases the pressure in chamber 126 , which causes piston 112 to extend away from portion 122 of the inner race and displace wedge plate 108 in circumferential direction CD 2 . Also in this position, fluid drains from chamber 124 through through-bore 128 and into low-pressure branch 156 . This fluid loss decreases the pressure in chamber 124 , which along with the displacement of wedge plate 108 , causes piston 110 to retract into cavity 124 toward portion 122 of the inner race.
- solenoid 164 and spring 166 shift spool 158 into a position that aligns either port pair 160 or port pair 162 with ends 130 and 140 of through-bores 128 and 138 , respectively.
- the force acting on spool 158 by solenoid 164 overcomes the force acting on spool 158 by spring 166 .
- the force acting on spool 158 by spring 166 overcomes the force acting on spool 158 by solenoid 164 .
- solenoid 164 is energized to shift spool 158 and initiate the locked mode
- solenoid 164 is de-energized to enable spring 166 to shift spool 158 and initiate the free-wheel mode.
- low-pressure branch 156 has reservoir 168 .
- high-pressure branch 154 has rotary device 170 , for example a pump or motor, a fixed volume single stage hydraulic pump 172 , fluid conditioning device 174 , check valve 176 , and reservoir 178 .
- fluid conditioning device 174 , check valve 176 and reservoir 178 make up a hydraulic suction strainer with a bypass. The pumps and the check valve maintain a pressure higher than the pressure in chambers 124 and 126 ,
- clutch 100 is not limited to the circumferential orientation shown in FIGS. 2 through 6 .
- the configuration of clutch 100 could be circumferentially reversed so that wedge plate 108 and inner race 102 taper in directions CD 2 and CD 1 , respectively, piston 110 urges wedge plate 108 in direction CD 2 , and piston 112 displaces wedge plate 108 in direction CD 1 .
- a first step displaces, using piston 110 , wedge plate 108 in direction CD 1 .
- a second step non-rotatably connects races 102 and 104 and wedge plate 108 .
- a third step displaces, using piston 112 , wedge plate 108 in direction CD 2 .
- a fourth step separates, in radial direction RD, surfaces 116 and 118 and surfaces 120 and 114 to enable independent rotation of races 102 and 104 .
- Displacing wedge plate 108 in direction CD 1 includes: supplying fluid to chamber 124 from through-bore 128 ; displacing piston 110 in direction CD 1 in response to the fluid in chamber 124 ; and displacing circumferential end 148 of the wedge plate with piston 110 .
- Displacing wedge plate 108 in direction CD 2 includes: supplying fluid to chamber 126 from through-bore 138 ; displacing piston 112 in direction CD 2 in response to the fluid in chamber 126 ; and displacing circumferential end 146 of the wedge plate with piston 112 .
- Non-rotatably connecting races 102 and 104 and wedge plate 108 includes bringing into contact and non-rotatably engaging: at least respective portions of surfaces 116 and 118 , and at least respective portions of surfaces 114 and 120 .
- Piston 110 is located in chamber 124 in extended portion 122 of the inner race, the extended portion extending furthest in radial direction RD toward the outer race.
- Piston 112 is located in chamber 126 in extended portion 122 .
- Displacing the wedge plate in the circumferential direction CD 1 includes: supplying fluid to chamber 124 from a hydraulic circuit through through-bore 128 ; displacing piston 110 in circumferential direction CD 1 in response to the fluid in the chamber 124 ; and displacing circumferential end 144 of the wedge plate with piston 110 .
- Displacing the wedge plate in circumferential direction CD 1 includes: supplying fluid to chamber 126 from the hydraulic circuit through through-bore 138 ; displacing piston 112 in circumferential direction CD 2 in response to the fluid in the chamber 126 ; and displacing circumferential end 146 of the wedge plate with piston 112 .
- wedge assembly 106 enables operation of clutch 100 independent of rotation, or non-rotation, of races 102 and 104 . That is, wedge assembly 106 is arranged to non-rotatably connect races 102 and 104 in the locked mode regardless of any respective rotation or lack of respective rotation of the races 102 and 104 ; and clutch 100 is arranged to transition from the locked mode to the free-wheel mode regardless of any respective rotation or lack of respective rotation of races 102 and 104 . For example, frictional engagement between respective surfaces of wedge plate 108 and respective surfaces of races 102 and 104 is not needed or used to trigger engagement of clutch 100 or initiate disengagement of clutch 100 . Thus, clutch 100 is operable under any and all operations of races 102 and 104 .
- a two position hydraulic valve 154 can be used to control the connection of the wedge assembly to a pressurized oil and oil tank.
- wedge ring 108 is pushed to locking position and the locking function of the one-way clutch is enabled.
- the one-way clutch works as the normal one-way clutch.
- the wedge ring 108 is pushed to the unlocking position and the locking function of the one-way clutch is disabled.
- the one-way clutch is in free-wheel mode in both relative rotation directions between the inner race and the outer race.
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Abstract
Description
- The present invention relates generally to a wedge friction clutch with controllable clutch locking function. In particular, the clutch includes a wedge plate and a piston arrangement that enables operation of the clutch independent of rotation of inner and outer races for the clutch.
- Wedge friction clutches typically include inner and outer races and a wedge plate disposed between the inner and outer races. It is known to engage and disengage such clutches according to the relative rotation of the inner and outer races. However, such an arrangement limits controllability of the clutches. For instance, engaging and disengaging can only be accomplished for specific relative rotation combinations.
- According to aspects illustrated herein, there is provided a wedge friction clutch with controllable clutch locking function, having an axis of rotation, an inner race, an outer race located radially outward of the inner race, and, a wedge assembly including a wedge plate located between the inner and outer races in a radial direction, a first piston arranged to displace the wedge plate in a first circumferential direction, and, a second piston arranged to displace the wedge plate in a second circumferential direction, opposite the first circumferential direction.
- According to aspects illustrated herein, there is provided a wedge friction clutch with controllable clutch locking function, having an axis of rotation, an outer race, an inner race located radially inward of the outer race and including an extended portion extending furthest in a radial direction toward the outer race, and, an inner circumference, and, a wedge assembly including a wedge plate located between the inner and outer races in the radial direction and including first and second chambers connected to the inner circumference by first and second through-bores, respectively, and, first and second circumferential ends, and, a first piston housed in the first chamber and arranged to displace in a first circumferential direction to engage the first circumferential end to displace the wedge plate in the first circumferential direction to initiate a locked mode in which the inner and outer races are non-rotatably connected, and, a second piston housed in the second chamber and arranged to be displaced in a second circumferential direction, opposite the first circumferential direction, to engage the second circumferential end to displace the wedge plate in the second circumferential direction to initiate a free-wheel mode in which the inner and outer races are independently rotatable with respect to each other.
- According to aspects illustrated herein, there is provided a method of operating a wedge clutch including an axis of rotation, an inner race, an outer race located radially outward of the inner race, and a wedge assembly including a first piston, a second piston, and a wedge plate located between the inner and outer races, the method having the steps of displacing the wedge plate in a first circumferential direction with the first piston, non-rotatably connecting the inner and outer races and the wedge plate, displacing the wedge plate in a second circumferential direction, opposite the first circumferential direction, with the second piston, and, separating, in a radial direction, respective surfaces of the inner and outer races and the wedge plate to enable independent rotation of the inner and outer races.
- Various embodiments are disclosed, by way of example only, with reference to the accompanying drawings in which corresponding reference symbols indicate corresponding parts, in which:
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FIG. 1 is a perspective view of a cylindrical coordinate system demonstrating spatial terminology used in the present application; -
FIG. 2 is a front view of a wedge clutch with the controllable clutch locking function; -
FIG. 3 is a perspective front view of the wedge clutch ofFIG. 2 ; -
FIG. 4 is a cross-sectional view of the inner race ofFIG. 2 along a plane orthogonal to an axis of rotation for the clutch; -
FIG. 5 is a cross-sectional view of the inner race and wedge plate ofFIG. 2 along a plane orthogonal to an axis of rotation for the clutch; -
FIG. 6 is a fragmentary schematic view showing the connection of the wedge clutch to an oil circuit. - At the outset, it should he appreciated that like drawing numbers on different drawing views identify identical or functionally similar, structural elements of the disclosure. It is to be understood that the disclosure as claimed is not limited to the disclosed aspects.
- Furthermore, it is understood that this disclosure is not limited to the particular methodology, materials and modifications described and as such may, of course, vary. It is also understood that the terminology used herein is for the purpose of describing particular aspects only, and is not intended to limit the scope of the present disclosure.
- Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood to one of ordinary skill in the art to which this disclosure belongs. It should be understood that any methods, devices or materials similar or equivalent to those described herein can be used in the practice or testing of the disclosure.
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FIG. 1 is a perspective view ofcylindrical coordinate system 10 demonstrating spatial terminology used in the present application. The present application is at least partially described within the context of a cylindrical coordinate system.System 10 includeslongitudinal axis 11, used as the reference for the directional and spatial terms that follow. Axial direction AD is parallel toaxis 11. Radial direction RD is orthogonal toaxis 11. Circumferential direction CD is defined by an endpoint of radius R (orthogonal to axis 11) rotated aboutaxis 11. - To clarify the spatial terminology,
objects surface 15 ofobject 12, is formed by a plane co-planar withaxis 11.Axis 11 passes throughplanar surface 15; however any planar surface co-planar withaxis 11 is an axial surface. A radial surface, such assurface 16 ofobject 13, is formed by a plane orthogonal toaxis 11 and co-planar with a radius, for example,radius 17.Radius 17 passes throughplanar surface 16; however any planar surface co-planar withradius 17 is a radial surface.Surface 18 ofobject 14 forms a circumferential, or cylindrical, surface. For example,circumference 19 passes throughsurface 18. As a further example, axial movement is parallel toaxis 11, radial movement is orthogonal toaxis 11, and circumferential movement is parallel tocircumference 19. Rotational movement is with respect toaxis 11. The adverbs “axially,” “radially,” and “circumferentially” refer to orientations parallel toaxis 11,radius 17, andcircumference 19, respectively. For example, an axially disposed surface or edge extends in direction AD, a radially disposed surface or edge extends in direction R, and a circumferentially disposed surface or edge extends in direction CD. -
FIG. 2 is a front view ofwedge friction clutch 100 with controllable clutch locking function. -
FIG. 3 is a perspective front view ofwedge friction clutch 100 ofFIG. 2 . -
FIG. 4 is a cross-sectional view of the inner race ofFIG. 2 along a plane orthogonal to an axis of rotation for the clutch. -
FIG. 5 is a cross-sectional view of the inner race and wedge plate ofFIG. 2 along a plane orthogonal to an axis of rotation for the clutch. The following should be viewed in light ofFIGS. 2 through 5 .Wedge friction clutch 100 includes: axis of rotation AR;inner race 102;outer race 104 located radially outward ofinner race 102, for example in radial direction RD; andwedge assembly 106.Wedge assembly 106 includeswedge plate 108 located betweenraces piston 110 andpiston 112. - For a locked mode in which
races piston 110 is arranged to displacewedge plate 108 in circumferential direction CD1. For a free-wheel mode in whichraces piston 112 is arranged to displacewedge plate 108 in circumferential direction CD2, opposite circumferential direction CD1. -
Inner race 102 includes radiallyoutermost surface 114.Outer race 104 includes radiallyinnermost surface 116.Wedge plate 108 includes radially outermost surface 118 (labeled inFIG. 3 ) and radiallyinnermost surface 120. For the locked mode: at least respective portions ofsurfaces surfaces outer race 104 has rivetpoints 121 circumferentially displaced from each other to attach to a component that can either driverace 104 or be driven byrace 104. -
Inner race 102 includesportion 122 extending furthest in radial direction RD towardouter race 104.Portion 122 haschambers chamber 124. Piston 112 is housed inchamber 126.Inner race 102 also includes through-bore 128 includingend 130 open toinner circumference 132 of the inner race, and end 134 open tochamber 124.Inner race 102 includesgap 136 to mesh with a component that can either driveinner race 102 or be driven byinner race 102.Inner race 102 includes through-bore 138 havingend 140 open toinner circumference 132 of the inner race, and end 142 open tochamber 126. - For a locked mode, fluid is supplied to
chamber 124 through through-bore 128 to displacepiston 110 in circumferential direction CM so thatpiston 110 displaceswedge plate 108 in direction CD1. Further, fluid is drained fromchamber 126 through through-bore 138 so thatpiston 112 retracts intochamber 126 in direction CD1. - For a free-wheel mode, fluid is supplied to
chamber 126 through through-bore 138 to displacepiston 112 in circumferential direction CD2 so thatpiston 112 displaceswedge plate 108 in direction CD2. Further, aswedge plate 108 displaces in direction CD2, the wedge plate pushespiston 110 so that fluid is drained fromchamber 124 through through-bore 128 andpiston 110 retracts intochamber 124 in direction CD2. - For a locked mode, fluid is supplied to
chamber 124 through through-bore 128 to displacepiston 110 in circumferential direction CD1 so thatpiston 110 displaceswedge plate 108 in direction CD1. Further, aswedge plate 108 displaces in direction CD1, the wedge plate pushespiston 112 so that fluid is drained fromchamber 126 through through-bore 138 andpiston 112 retracts intochamber 126 in direction CD1. -
Wedge plate 108 includes circumferential ends 144 and 146. Dimension D1 ofwedge plate 108, in radial direction RD, decreases moving fromend 144 towardend 146 in direction CD1. That is, a radial extent ofwedge plate 108 tapers in direction CD1.Inner race 102 includesportions ends portion 148 towardportion 150 in direction CD1. - Line L, in direction CD1 or CD2, passes through
portion 122 and circumferential ends 144 and 146. In an example embodiment, no portion ofwedge assembly 106 extends beyondrace 102 orrace 104 in opposite axial directions AD1 or AD2. -
FIG. 6 is a fragmentary schematic view showing the connection of the wedge clutch tohydraulic circuit 152. In an example embodiment,hydraulic circuit 152 is a four-way, two position, direct solenoid-operated, spring-return control valve that controlspistons -
Valve 152 has high-pressure branch 154 and low-pressure branch 156. When the clutch is in locked mode,spool 158 is in aposition connecting chamber 124 to high-pressure branch 154 andchamber 126 to low-pressure branch 156 withport pair 160. In this position, fluid flows from high-pressure branch 154 through through-bore 128 and intochamber 124. This fluid supply increases the pressure inchamber 124, which causespiston 110 to extend away fromportion 122 of the inner race and displacewedge plate 108 in circumferential direction CD1. Also in this position, fluid flows fromchamber 126 through through-bore 138 and into low-pressure branch 156. This fluid loss decreases the pressure inchamber 126, which causespiston 112 to retract intocavity 126 towardsportion 122 of the inner race. - When the clutch is in free-wheel mode,
spool 158 is in aposition connecting chamber 126 to high-pressure branch 154 andchamber 124 to low-pressure branch 156 withport pair 162. In this position, fluid flows from high-pressure branch 154 through through-bore 138 and intochamber 126. This fluid supply increases the pressure inchamber 126, which causespiston 112 to extend away fromportion 122 of the inner race and displacewedge plate 108 in circumferential direction CD2. Also in this position, fluid drains fromchamber 124 through through-bore 128 and into low-pressure branch 156. This fluid loss decreases the pressure inchamber 124, which along with the displacement ofwedge plate 108, causespiston 110 to retract intocavity 124 towardportion 122 of the inner race. - To switch between the locked mode and the free-wheel mode,
solenoid 164 andspring 166shift spool 158 into a position that aligns eitherport pair 160 orport pair 162 withends bores spool 158 bysolenoid 164 overcomes the force acting onspool 158 byspring 166. In the free-wheel mode, the force acting onspool 158 byspring 166 overcomes the force acting onspool 158 bysolenoid 164. In an example embodiment,solenoid 164 is energized to shiftspool 158 and initiate the locked mode, andsolenoid 164 is de-energized to enablespring 166 to shiftspool 158 and initiate the free-wheel mode. - In an example embodiment, low-
pressure branch 156 hasreservoir 168. In an example embodiment, high-pressure branch 154 hasrotary device 170, for example a pump or motor, a fixed volume single stagehydraulic pump 172,fluid conditioning device 174,check valve 176, andreservoir 178. In an example embodiment,fluid conditioning device 174,check valve 176 andreservoir 178 make up a hydraulic suction strainer with a bypass. The pumps and the check valve maintain a pressure higher than the pressure inchambers - It should be understood that
clutch 100 is not limited to the circumferential orientation shown inFIGS. 2 through 6 . For example, the configuration ofclutch 100 could be circumferentially reversed so thatwedge plate 108 andinner race 102 taper in directions CD2 and CD1, respectively,piston 110 urgeswedge plate 108 in direction CD2, andpiston 112 displaceswedge plate 108 in direction CD1. - The following should be viewed in light of
FIGS. 2 through 6 . The following describes a method of operatingwedge clutch 100. Although the method is presented as a sequence of steps for clarity, no order should be inferred from the sequence unless explicitly stated. A first step displaces, usingpiston 110,wedge plate 108 in direction CD1. A second step non-rotatably connectsraces wedge plate 108. A third step displaces, usingpiston 112,wedge plate 108 in direction CD2. A fourth step separates, in radial direction RD, surfaces 116 and 118 andsurfaces races - Displacing
wedge plate 108 in direction CD1 includes: supplying fluid tochamber 124 from through-bore 128; displacingpiston 110 in direction CD1 in response to the fluid inchamber 124; and displacingcircumferential end 148 of the wedge plate withpiston 110. Displacingwedge plate 108 in direction CD2 includes: supplying fluid tochamber 126 from through-bore 138; displacingpiston 112 in direction CD2 in response to the fluid inchamber 126; and displacingcircumferential end 146 of the wedge plate withpiston 112. - Non-rotatably connecting
races wedge plate 108 includes bringing into contact and non-rotatably engaging: at least respective portions ofsurfaces surfaces -
Piston 110 is located inchamber 124 inextended portion 122 of the inner race, the extended portion extending furthest in radial direction RD toward the outer race.Piston 112 is located inchamber 126 inextended portion 122. Displacing the wedge plate in the circumferential direction CD1 includes: supplying fluid tochamber 124 from a hydraulic circuit through through-bore 128; displacingpiston 110 in circumferential direction CD1 in response to the fluid in thechamber 124; and displacingcircumferential end 144 of the wedge plate withpiston 110. - Displacing the wedge plate in circumferential direction CD1 includes: supplying fluid to
chamber 126 from the hydraulic circuit through through-bore 138; displacingpiston 112 in circumferential direction CD2 in response to the fluid in thechamber 126; and displacingcircumferential end 146 of the wedge plate withpiston 112. - The following provides further detail regarding
wedge friction clutch 100. Advantageously,wedge assembly 106 enables operation ofclutch 100 independent of rotation, or non-rotation, ofraces wedge assembly 106 is arranged to non-rotatably connectraces races races wedge plate 108 and respective surfaces ofraces clutch 100 or initiate disengagement ofclutch 100. Thus, clutch 100 is operable under any and all operations ofraces - In short, a two position
hydraulic valve 154 can be used to control the connection of the wedge assembly to a pressurized oil and oil tank. Whenchamber 124 andpiston 110 are connected to the oil supply,wedge ring 108 is pushed to locking position and the locking function of the one-way clutch is enabled. In this mode, the one-way clutch works as the normal one-way clutch. Whenchamber 126 is connected to the oil supply, thewedge ring 108 is pushed to the unlocking position and the locking function of the one-way clutch is disabled. In this mode, the one-way clutch is in free-wheel mode in both relative rotation directions between the inner race and the outer race. - It will be appreciated that various of the above-disclosed and other features and functions, or alternatives thereof, may be desirably combined into many other different systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may be subsequently made by those skilled in the art which are also intended to be encompassed by the following claims.
Claims (19)
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US14/683,619 US9464675B1 (en) | 2015-04-10 | 2015-04-10 | Wedge friction one-way clutch with controllable clutch locking function |
DE102016205878.9A DE102016205878B4 (en) | 2015-04-10 | 2016-04-08 | Spline friction one-way clutch with controllable clutch locking function |
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US14/683,619 US9464675B1 (en) | 2015-04-10 | 2015-04-10 | Wedge friction one-way clutch with controllable clutch locking function |
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US9464675B1 US9464675B1 (en) | 2016-10-11 |
US20160298702A1 true US20160298702A1 (en) | 2016-10-13 |
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US14/683,619 Active 2035-05-20 US9464675B1 (en) | 2015-04-10 | 2015-04-10 | Wedge friction one-way clutch with controllable clutch locking function |
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Cited By (6)
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US20160032988A1 (en) * | 2014-08-01 | 2016-02-04 | Schaeffler Technologies AG & Co. KG | Wedge friction clutch with onboard enable and disable function |
WO2018169613A1 (en) * | 2017-03-13 | 2018-09-20 | Schaeffler Technologies AG & Co. KG | Wedge clutch with integrated armature |
US10337564B2 (en) | 2016-12-22 | 2019-07-02 | Schaeffler Technologies AG & Co. KG | Segmented wedge clutch with stepped retaining spring |
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RU208428U1 (en) * | 2021-04-27 | 2021-12-17 | Александр Владимирович Козленок | FREE SPEED WEDGE CLUTCH WITH HYDRAULIC STABILIZER |
US20230003263A1 (en) * | 2019-11-26 | 2023-01-05 | A & A International, Llc | System and method for hydraulic transformer clutches |
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US10107149B2 (en) * | 2015-04-30 | 2018-10-23 | Schaeffler Technologies AG & Co. KG | Multi-position camshaft phaser with two one-way wedge clutches |
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CH659867A5 (en) | 1983-07-06 | 1987-02-27 | Kaliningrad T I Rybnoi Promy | FREE COUPLING. |
DE19631588A1 (en) * | 1996-08-05 | 1998-02-12 | Schaeffler Waelzlager Kg | Tensioning wheel for traction devices |
US6974011B2 (en) | 2003-12-22 | 2005-12-13 | The Timken Company | Directional clutch |
DE102008061077A1 (en) | 2007-12-19 | 2009-06-25 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Freewheel friction clutch |
CA2719631A1 (en) * | 2010-02-04 | 2011-08-04 | Dalhousie University | Toroidal engine |
DE102012203635A1 (en) * | 2012-03-08 | 2013-09-12 | Schaeffler Technologies AG & Co. KG | Phaser |
US9151339B2 (en) * | 2013-02-16 | 2015-10-06 | Schaeffler Technologies AG & Co. KG | Locking disconnect clutch |
US9470275B2 (en) | 2013-12-03 | 2016-10-18 | Schaeffler Technologies AG & Co. KG | Wedge clutch with a segmented wedge element and chamfered engagement surfaces |
US9970491B2 (en) * | 2014-08-01 | 2018-05-15 | Schaeffler Technologies AG & Co. KG | Wedge friction clutch with onboard enable and disable function |
US9746039B2 (en) * | 2016-01-20 | 2017-08-29 | Schaeffler Technologies AG & Co. KG | Wedge friction clutch with onboard enable and disable function |
-
2015
- 2015-04-10 US US14/683,619 patent/US9464675B1/en active Active
-
2016
- 2016-04-08 DE DE102016205878.9A patent/DE102016205878B4/en active Active
Cited By (8)
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US20160032988A1 (en) * | 2014-08-01 | 2016-02-04 | Schaeffler Technologies AG & Co. KG | Wedge friction clutch with onboard enable and disable function |
US9970491B2 (en) * | 2014-08-01 | 2018-05-15 | Schaeffler Technologies AG & Co. KG | Wedge friction clutch with onboard enable and disable function |
US10337564B2 (en) | 2016-12-22 | 2019-07-02 | Schaeffler Technologies AG & Co. KG | Segmented wedge clutch with stepped retaining spring |
WO2018169613A1 (en) * | 2017-03-13 | 2018-09-20 | Schaeffler Technologies AG & Co. KG | Wedge clutch with integrated armature |
US10302153B2 (en) | 2017-03-13 | 2019-05-28 | Schaeffler Technologies AG & Co. KG | Wedge clutch with integrated armature |
US10788084B2 (en) | 2017-11-29 | 2020-09-29 | Schaeffler Technologies AG & Co. KG | Method for controlling electromagnetic wedge clutch |
US20230003263A1 (en) * | 2019-11-26 | 2023-01-05 | A & A International, Llc | System and method for hydraulic transformer clutches |
RU208428U1 (en) * | 2021-04-27 | 2021-12-17 | Александр Владимирович Козленок | FREE SPEED WEDGE CLUTCH WITH HYDRAULIC STABILIZER |
Also Published As
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DE102016205878B4 (en) | 2023-11-09 |
US9464675B1 (en) | 2016-10-11 |
DE102016205878A1 (en) | 2016-10-13 |
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