CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit to U.S. Provisional Application No. 63/081,236 filed on September 21, 2020 and to U.S. Non-Provisional Application 17/386,717 filed on July 28, 2021, which application is incorporated herein by reference.

TECHNICAL FIELD

[0002] The present disclosure relates to a centrifugal lift-off ratcheting one-way clutch with dual outer race plates forming chambers for rocker assemblies.

BACKGROUND

[0003] Known ratcheting one-way clutches are used in a variety of power train configurations.

SUMMARY

[0004] According to aspects illustrated herein, there is provided a one-way clutch, including: an outer race including a first outer race plate defining a first rocker pocket and a second outer race plate non-rotatably connected to the first outer race plate and defining a second rocker pocket; an inner race axially disposed between the first outer race plate and the second outer race plate; and a rocker assembly including a rocker arranged to contact the inner race and including a first portion disposed in the first rocker pocket and a second portion disposed in the second rocker pocket, a spring guide retained by the first outer race plate and the second outer race plate, and a spring engaged with the spring guide and in contact with the rocker.

[0005] According to aspects illustrated herein, there is provided a one-way clutch, including: an outer race including a first outer race plate including a first annular planar surface facing in a first axial direction parallel to an axis of rotation of the one-way clutch and a first pocket wall off-set, in a second axial direction opposite the first axial direction, from the first planar annular surface, and defining a first rocker pocket in the second axial direction, and a second outer race plate including a second annular planar surface facing in the second axial direction and a second pocket wall off-set, in the first axial direction, from the second planar annular surface, and defining a second rocker pocket in the first axial direction; an inner race axially disposed between the first outer race plate and the second outer race plate, and a rocker assembly including a rocker including a first portion disposed in the first rocker pocket and a second portion disposed in the second rocker pocket, a spring guide retained by the first outer race plate and the second outer race plate and including a spring arm, and a spring retained by the first outer race plate and the second outer race plate, wrapped around the spring arm, and in contact with the rocker.

[0006] According to aspects illustrated herein, there is provided a one-way clutch, including: an outer race including a first outer race plate including a first annular planar surface facing in a first axial direction parallel to an axis of rotation of the one-way clutch and a first pocket wall off-set, in a second axial direction opposite the first axial direction, from the first planar annular surface, and defining a first rocker pocket in the second axial direction, and a second outer race plate including a second annular planar surface facing in the second axial direction and a second pocket wall off-set, in the first axial direction, from the second planar annular surface, and defining a second rocker pocket in the first axial direction; an inner race axially disposed between the first outer race plate and the second outer race plate; and a rocker assembly including a rocker including a first portion disposed in the first rocker pocket and a second portion disposed in the second rocker pocket, a spring guide including a spring arm, a first portion disposed in the first rocker pocket, and a second portion disposed in the second rocker pocket, and a spring wrapped around the spring arm, in contact with rocker, and including a first portion disposed in the first rocker pocket and a second portion disposed in the second rocker pocket.

BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Various embodiments are disclosed, by way of example only, with reference to the accompanying schematic drawings in which corresponding reference symbols indicate corresponding parts, in which: Figure 1 is a front view of an example centrifugal lift-off ratcheting one-way clutch with rocker pockets;

Figure 2 is a back view of the centrifugal lift-off ratcheting one-way clutch shown in Figure 1;

Figure 3 is an exploded view of the centrifugal lift-off ratcheting one-way clutch shown in Figure 1;

Figure 4 is a cross-sectional view generally along line 4-4 in Figure 1;

Figure 5 is a back view of a pocket, in a front outer race plate shown in Figure 1, with a rocker assembly in a lift-off mode;

Figure 6 is a back view of the pocket shown in Figure 5, with the rocker assembly removed;

Figure 7 is a cross-sectional view generally along line 7/10-7/10 in Figure 1;

Figure 8 is a front view of a pocket in a rear outer race plate, shown in Figure 2, with a rocker assembly in a locked mode;

Figure 9 is a front view of the pocket shown in Figure 8 with the rocker assembly removed;

Figure 10 is a cross-sectional view generally along line 7/10-7/10 in Figure 1 with a rocker assembly removed; and

Figure 11 is a front view of a pocket in a rear outer race plate, shown in Figure 2, with a rocker assembly in a free-wheel mode.

DETAILED DESCRIPTION

[0008] At the outset, it should be 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.

[0009] 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. [0010] 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.

[0011] Figure 1 is a front view of an example centrifugal lift-off ratcheting one-way clutch 100, with rocker pockets.

[0012] Figure 2 is a back view of centrifugal lift-off ratcheting one-way clutch 100 shown in Figure 1.

[0013] Figure 3 is an exploded view of centrifugal lift-off ratcheting one-way clutch 100 shown in Figure 1.

[0014] Figure 4 is a cross-sectional view generally along line 4-4 in Figure 1. The following should be viewed in light of Figures 1 through 4. Centrifugal lift-off ratcheting one-way clutch 100 includes: outer race 102; inner race 104; and rocker assemblies 105.

[0015] Figure 5 is a back view of a pocket, in a front outer race plate shown in Figure 1, with a rocker assembly in a lift-off mode.

[0016] Figure 6 is a back view of the pocket shown in Figure 5, with the rocker assembly removed. The following should be viewed in light of Figures 1 through 6. Each rocker assembly 105 includes: rocker 106; spring guide 108; and spring 110. Spring 110 includes helical coils 111. Outer race 102 includes front outer race plate 112 and rear outer race plate 114 non-rotatably connected to outer race plate 112 by any means known in the art. Spring guides 108 include arms 115. Each spring 110 is wrapped around a respective arm 115.

[0017] By "non-rotatably connected" components, we mean that components are connected so that whenever one of the components rotates, all the components rotate; and relative rotation between the components is precluded. Radial and/or axial movement of non- rotatably connected components with respect to each other is possible. Components connected by tabs, gears, teeth, or splines are considered as non-rotatably connected despite possible lash inherent in the connection. The input and output elements of a closed clutch are considered non-rotatably connected despite possible slip in the clutch. The input and output parts of a vibration damper, engaged with springs for the vibration damper, are not considered non-rotatably connected due to the compression and unwinding of the springs. Without a further modifier, the non-rotatable connection between or among components is assumed for rotation in any direction. However, the non-rotatable connection can be limited by use of a modifier. For example, "non-rotatably connected for rotation in circumferential direction CD1," defines the connection for rotation only in circumferential direction CD1.

[0018] Figure 7 is a cross-sectional view generally along line 7/10-7/10 in Figure 1. The following should be viewed in light of Figures 1 through 7. Inner race 104 is axially disposed between plate 112 and plate 114. Front outer race plate 112 defines pockets 116. For example, outer race plate 112 includes pocket walls 117 and pocket walls 118. Pocket walls 117 face at least partly in axial direction , parallel to axis of rotation AR of clutch 100, and define pockets 116 in axial direction AD2, opposite direction ADI. By "define" a pocket in a direction, we mean to form a boundary of the pocket in the direction. Pocket walls 118 define pockets 116 in: radially inner and outer directions RD1 and RD2, respectively; and opposite circumferential directions CD1 and CD1, around axis of rotation AR of clutch 100. Each pocket wall 118 includes: end 119 terminating at circumferential wall 120 of race plate 112; and end 121 terminating at circumferential wall 120. In the example of Figure 1, walls 118 are continuous between ends 119 and 121.

[0019] Figure 8 is a front view of a pocket in rear outer race plate 114, shown in Figure 2, with a rocker assembly 105 in a locked mode.

[0020] Figure 9 is a front view of the pocket shown in Figure 8 with rocker assembly 105 removed. The following should be viewed in light of Figures 1 through 9. Outer race plate 114 defines pockets 122. For example, outer race plate 114 includes pocket walls 123 and pocket walls 124. Pocket walls 123 face at least partly in axial direction AD2, and define pockets 122 in axial direction ADI. Pocket walls 124 define pockets 122 in: directions RD1 and RD2 and circumferential directions CD1 and CD1. Each pocket wall 124 includes: end 125 terminating at circumferential wall 126 of race plate 114; and end 128 terminating at circumferential wall 126. In the example of Figure 1, walls 124 are continuous between ends 125 and 128. [0021] Ends 119 and 121 define openings 129, facing radially inwardly, in wall 120. Ends 125 and 128 define openings 130, facing radially inwardly, in wall 126. Rockers 106 extend radially inwardly from pockets 116 and 122 through openings 129 and 130, respectively.

[0022] Figure 10 is a cross-sectional view generally along line 7/10-7/10 in Figure 1 with rocker assembly 105 removed. Respective sets of walls 117, 118, 123, and 124 define rocker chambers 132 and respective radially inwardly facing openings 134. For example, respective pairs of pockets 116 and 122 form chambers 132. Each rocker assembly 105 is disposed at least partly in a respective rocker chamber 132. In the example of Figures 7 and 10, line LI divides rocker assembly 105 and is used to depict: pocket 116; pocket 122; and portions of rocker assemblies 105 in pockets 116 and 122. In the example of Figures 7 and 10, line LI divides chamber 132. For example: portion 106A of rocker 106 is disposed in pocket 116; portion 106B of rocker 106 is disposed in pocket 122; portion 108A of spring guide 108 is disposed in pocket 116; portion 108A of spring guide 108 is disposed in pocket 122; portion 110A of spring 110 is disposed in pocket 116; and portion HOB of spring 110 is disposed in a pocket 122.

[0023] Springs 110 urge rockers 106 in pivot direction PD1 around pivot axis PA passing through portions 135 of rockers 106. Portions 135 are not rotatable in direction CD1 or CD2 with respect to outer race 102. Inner race 104 includes teeth 136 with surfaces 138 facing at least partly in direction CD1, and ramp surfaces 140 sloping radially outwardly along direction CD1.

[0024] For the locked mode of Figure 8, rotational torque transmitted through clutch 100 causes relative rotation of outer race 102, in direction CD2, with respect to inner race 104. Springs 110 urge at least one rocker 106 in direction PD1 and into contact with a surface 140 of a tooth 136. The rocker 106 slides along the surface 140 in direction CD2 until the rocker contacts a surface 138 of the tooth 136, which blocks further rotation of outer race 102, with respect to inner race 104, in direction CD2.

[0025] Figure 11 is a front view of a pocket 122 in rear outer race plate 114, shown in Figure 2, with rocker assembly 105 in a free-wheel mode. The following should be viewed in light of Figures 1 through 11. For the free-wheel mode of Figure 11, rotational torque transmitted through clutch 100 causes relative rotation of outer race 102, in direction CD1, with respect to inner race 104. Rockers 106 slide radially outwardly along successive ramp surfaces 140 in direction CD1 without contacting surfaces 138. Thus, outer race 102 is rotatable with respect to inner race 104 in direction CD1.

[0026] For the lift-off mode of Figure 5, rotational torque is applied to outer race 102 in direction CD1 and clutch 100 is initially in the free-wheel mode. When the speed of the relative rotation of outer race 102, in direction CD1 with respect to inner race 104, has increased sufficiently, clutch 100 transitions to the lift-off mode. In particular, the centrifugal force generated by the rotation of outer race 102 rotates rockers 106 in direction PD2, causing rockers 106 to rotate free of contact with teeth 136.

[0027] Portions 106A of rockers 106 have maximum dimension 142, in direction ADI and portions 106B of rockers 106 have maximum dimension 144 in direction ADI. In the example of Figure 1: dimension 142 is equal to dimension 144. In an example embodiment, not shown: one of dimension 142 or dimension 144 is at least one quarter of the other of dimension 142 or dimension 144; one of dimension 142 or dimension 144 is at least one third of the other of dimension 142 or dimension 144; or dimensions 142 and 144 are unequal.

[0028] In the example of Figure 1: an entirety of each spring guide 108 is disposed in a respective rocker chamber 132 in each of the locked mode, the free-wheel mode, and the lift-off mode; for each spring 110, at least end 146 is disposed in a respective rocker chamber 132 in each of the locked mode, the free-wheel mode, and the lift-off mode; and for each rocker 106, portion 135 is disposed in a respective rocker chamber 132 in each of the locked mode, the freewheel mode, and the lift-off mode.

[0029] Outer race plate 112 includes planar, annular surface 148 facing in direction ADI and outer race plate 114 includes planar, annular surface 150 facing in direction AD2. Walls 118 form edges 152 in surface 148. Walls 124 form edges 154 in surface 150. Walls 117 are off-set from surface 148 in direction AD2. Walls 123 are off-set from surface 150 in direction ADI.

[0030] Figure 10 is a cross-sectional view generally along line 10-10 in Figure 1. In the example of Figure 1, clutch 100 includes inertia ring 156 and fasteners 158. Fasteners 158 pass through and non-rotatably connect outer race plate 112, outer race plate 114, and inertia ring [0031] As seen, for example, in Figure 7, rocker assembly 105 is partly disposed in pocket

116 and partly disposed in pocket 122. Springs 110 are wrapped around and in contact with spring arms 1115. Springs 110 are retained in place at least partly by spring guides 108 and spring arms 115. In the example of Figure 1, springs 110 are retained in place solely by spring guides 108 and spring arms 115. For example, at least one half of coils 111 are free of contact with plates

112 and 114. In the example of Figure 1, every coil 111 is free of contact with plates 112 and 114. For example: pocket walls 118 and 124 are separated from coils 111 by gap 160; and pocket walls

117 and 123 are separated from coils 111 by gap 162.

[0032] 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.

List of Reference Characters:

ADI axial direction

AD2 axial direction

AR axis of rotation

CD1 circumferential direction

CD2 circumferential direction

PA pivot axis

PD1 pivot direction

PD2 pivot direction

100 centrifugal lift-off ratcheting one-way clutch

102 outer race

104 inner race

105 rocker assembly

106 rocker

108 spring guide

110 spring

111 coil, spring

112 outer race plate

114 outer race plate

115 spring arm, spring guide

116 pocket

117 pocket wall, outer race plate

118 pocket wall, outer race plate

119 end, pocket wall

120 circumferential wall, outer race plate

121 end, pocket wall

122 pocket

123 pocket wall, outer race plate 124 pocket wall, outer race plate

125 end, pocket wall

126 circumferential wall, race plate

128 end, pocket wall

129 opening, outer race plate

130 opening, outer race plate

132 rocker chamber

134 opening, rocker chamber

135 portion, rocker

136 tooth, inner race

138 surface, tooth

140 ramp surface, tooth

142 dimension, rocker

144 dimension, rocker

146 end, spring

148 surface, outer race plate

150 surface, outer race plate

152 edge, surface 148

154 edge, surface 150

156 inertia ring

158 fastener

160 gap

162 gap