Gear engagement mechanism

A shifting assembly for a vehicular transmission includes a shift rail having a yoke coupled thereto. A lever may be provided having portions forming an L-shaped slot. The yoke may engage the lever through the slot. The shift rail may be configured to shift the transmission into a forward gear ratio and a reverse gear ratio. The shift rail may be configured to translate along a primary axis in a first direction and in an opposite second direction. A shift fork may be coupled to the shift rail, which is configured to cause the transmission to shift into a forward gear ratio when the shift rail is translated in the first direction to a forward gear engagement position. The yoke may be configured to cause the transmission to shift into a reverse gear ratio when the shift rail is translated in the second direction to a reverse gear engagement position.

FIELD

The present disclosure relates to mechanisms used for shifting vehicular transmissions and more particularly to a lever and assembly for engaging a gear in a vehicular transmission.

BACKGROUND

Gear changes in manual and dual clutch transmissions are generally achieved by clutches, such as synchronizer clutches, which are splined to and which rotate with an associated shaft. Adjacent to each clutch is one or a pair of gears which provide distinct gear or speed ratios. Each clutch is movable to couple the gear to the shaft and drive torque is then applied to the engaged gear or shaft.

For example, a shifter assembly engages a yoke that is coupled to a shift rail. When the shifter assembly moves the yoke, the shift rail and the attached clutches are moved, which engage a gear on one side of clutch. In some cases, the rail can be axially moved in an opposite direction by the yoke to engage the clutch with a second gear disposed on an opposite side of the clutch. Accordingly, each yoke is typically coupled to a dedicated rail, and one or two gears can be activated by the clutch on a particular rail.

In addition, to engage a reverse gear (or another gear), one of the yokes may engage a reverse lever that rotates about a pivot point. The reverse lever is operable to selective engage the reverse gear. A dedicated shift rail and yoke is used for the rotating reverse lever, which typically includes a coil spring and ball for detent actuation.

Because each shift rail occupies space in the transmission and requires mounting bosses and/or linear bearings, the shift rails add to the complexity and cost of a transmission. Reducing their number is thus desirable.

SUMMARY

The present disclosure provides a single shift rail for engaging two different gear ratios, such as a forward gear ratio and a reverse gear ratio. A reverse gear engagement lever may be provided which has portions forming an L-shaped slot through which a yoke coupled to the shift rail engages a reverse gear in one position while refraining from engaging the reverse gear in another position.

In one variation, a shifting assembly for a transmission of a motor vehicle is provided. The shifting assembly includes a shift rail for shifting the transmission into a plurality of gear ratios, a shifting yoke coupled to the shift rail, and a lever. The shifting yoke has a pin extending therefrom. The lever has portions forming an L-shaped slot therein. The pin of the shifting yoke engages the lever through the L-shaped slot.

In another variation, which may be combined with or separate from the other variations described therein, a shifting lever for a transmission of a motor vehicle is provided. The shifting lever includes a main body portion forming an L-shaped slot therein. The L-shaped slot is configured to be engaged by a pin of a shifting yoke. The shifting lever also has a rotating end portion configured to rotate about a pivot point. The rotating end portion is connected to the main body portion. Further, the shifting lever has a lever arm end configured to selectively engage a gear. The lever arm end is connected to the main body portion. The lever arm end is disengaged from the gear in a first position, and the lever arm end engages the gear in a second position.

In yet another variation, which may be combined with or separate from the other variations described therein, a shifting assembly for a transmission of a motor vehicle is provided. The shifting assembly includes a shift rail for shifting the transmission into a forward gear ratio and a reverse gear ratio. The shift rail defines a primary axis along a length of the shift rail, and the shift rail is configured to translate along the primary axis in a first direction and a second direction, wherein the first direction is opposite the second direction. A shift fork is coupled to the shift rail. The shift fork is configured to cause the transmission to shift into a forward gear ratio when the shift rail is translated in the first direction to a forward gear engagement position. A shifting yoke is also coupled to the shift rail. The shifting yoke is configured to cause the transmission to shift into a reverse gear ratio when the shift rail is translated in the second direction to a reverse gear engagement position.

DETAILED DESCRIPTION

With reference now toFIG. 1, a portion of a vehicular transmission is illustrated and generally designated by the reference number10. By way of example, the transmission10may be either a manual transmission, a dual clutch transmission (DCT) or other configuration wherein synchronizers and face or dog clutches are utilized to connect a plurality of gears to one or more associated shafts. The transmission10includes an exterior housing12which typically includes openings, counterbores, shoulders, flanges and the like which locate, receive and retain various components of the transmission10.

The transmission10includes a shifting assembly11. Supported for rotation within the housing12on, for example, bearing surfaces or assemblies, are various shafts, one of which, a countershaft or layshaft16, is illustrated. The countershaft16is coupled to a reverse idler gear18. A fifth gear shaft17is provided having a fifth gear19disposed thereon. In other embodiments, the fifth gear shaft17could be used for a forward gear other than fifth gear, however. Other shafts may include a fifth gear and reverse gear shift rail20(which could alternatively be another forward gear combined with the reverse gear shift rail), a first/second gear shift rail22, and a third/fourth gear shift rail24. Each shift rail20,22,24has at least one shift fork26,28,30coupled to the shift rail for activating an adjacent gear (not shown). The shift forks26,28,30each have a clutch32(other clutches not shown) disposed thereon for coupling the shift fork26,28,30to a gear. For example, the fifth/reverse shift rail20is coupled to a first shift fork26, which is coupled to a clutch32. The clutch32is configured to engage the fifth gear19. As should be understood, however, the fifth gear19could alternatively be another forward gear.

Each shift rail20,22,24also has a shift yoke34,36,38coupled to the shift rail20,22,24for axially moving the shift rail20,22,24. For example, the fifth/reverse shift rail20has a fifth/reverse yoke34coupled to the fifth/reverse shift rail20. A shifter assembly40is operable to axially translate the fifth/reverse shift yoke34, which axially translates the shift rail20, the fifth/reverse yoke34, and the fifth gear clutch32.

InFIG. 1, the fifth/reverses shift rail20is illustrated in a neutral position without either of the fifth gear19or the reverse idler gear18being engaged. However, when the shift rail20is axially translated to the left to a fifth gear (or forward gear) engagement position (in the orientation ofFIG. 1), the fifth gear19will be engaged. As the fifth/reverse yoke34is axially translated, it slides within an L-shaped slot42formed in a reverse gear engaging lever44. When the shift rail20is translated to the right (in the orientation ofFIG. 1), the fifth/reverse yoke34causes the reverse gear engaging lever44to rotate about a pivot point P and engage the reverse idler gear18, which will be described in further detail below.

The reverse gear engaging lever44is part of a cantilever detent assembly46, which allows the reverse gear engaging lever44to rotate with respect to a bracket48attached to the transmission housing12when the reverse idler18is being engaged. However, the cantilever detent assembly46exerts a positive hold on the reverse gear engaging lever44in a position that is stationary with respect to the transmission housing12, and substantially vertical in the orientation ofFIG. 1, when fifth gear19is being engaged, which will be described in further detail below.

Referring now toFIGS. 2, 3A, 3B, 4A, 4B, 5A, 5B, 6A, and 6B, additional details of the reverse gear engaging lever44and the cantilever detent assembly46are illustrated. Referring toFIG. 2, the reverse gear engaging lever44is illustrated. The reverse gear engaging lever has a main body portion43forming the L-shaped slot42therein. A round, rotating end portion50of the reverse gear engaging lever44is assembled with and part of the cantilever detent assembly46. The rotating end portion50is connected to the main body portion43. The reverse gear engaging lever44, including the rotating end portion50, is configured to rotate about the pivot point P located in the center of the round portion50of the reverse gear engaging lever44. A lever arm45is connected to the main body portion43. The lever arm45is configured to selectively engage the reverse idler gear18. More specifically, the lever arm45engages the reverse idler gear18when the reverse gear engagement lever44and the cantilever detent assembly46are in the third position99illustrated inFIGS. 6A-6Bbelow (as well asFIG. 2). The lever arm45is disengaged from the reverse idler gear18, however, when the reverse gear engaging lever44and the cantilever detent assembly46are disposed in the first position97, explained below and shown inFIGS. 4A-4B(as well asFIG. 2).

The reverse gear engaging lever44has portions forming the L-shaped slot42in the main body portion43. The L-shaped slot42has a long portion52, or first channel, that allows a pin53of the fifth/reverse yoke (see FIG.1) to move in a horizontal direction in the long portion52of the slot42(in the orientation ofFIG. 2) when the shift rail20is engaging and disengaging from the fifth gear19. The L-shaped slot42has a short portion54, or second channel, which is in communication with the long portion52and oriented perpendicular to the long portion52. When the pin53of the fifth/reverse yoke34is disposed in the short portion54of the L-shaped slot42, the pin53causes the reverse gear engaging lever44to rotate about the pivot point P.

Referring toFIGS. 3A-3B, an exploded view and an assembled view of the cantilever detent assembly46is illustrated, though the reverse gear engaging lever44and the bracket48are omitted from the assembly view inFIG. 3B. As can be seen inFIG. 3A, the reverse gear engaging lever44defines an opening56therein. Thus, the reverse gear engaging lever44has portions forming the opening56. A first groove58and a second groove60are formed in the reverse gear engaging lever44, at the edge of the opening56. A raised portion61of the reverse gear engaging lever44protrudes into the opening56and separates the first and second grooves58,60. The detent assembly46also has a ball62, a spring plate64, a side plate66, and a retainer ring68.

In addition, the cantilever detent assembly46has a generally cylindrical detent housing70. The detent housing70has four legs72,74,76,78extending from an end80thereof. Each leg72,74,76,78defines opposing retainer wall surfaces. For example, the first leg72defines a first retainer wall surface72A and a second retainer wall surface72B. Likewise, the second leg74defines a first retainer wall surface74A and a second retainer wall surface74B.

When the cantilever detent assembly46is assembled, the detent housing70is fixedly connected to the bracket48, the side plate66, the retainer ring68, the spring plate64, and the transmission housing12. The detent housing70has a projection82extending from its cylindrical outer wall84, and the projection mates with an indentation86formed in the bracket48. The detent housing70has a cylindrical end hub88that is disposed adjacent to the cylindrical outer wall84, and the cylindrical end hub88has a greater outer diameter than the outer diameter of the cylindrical outer wall84of the detent housing70. Thus, the end hub88has a horizontal surface90that is disposed in contact with the bracket48when the cantilever detent assembly46is assembled. The outer wall84extends through an aperture87in the bracket and the opening56of the reverse gear engaging lever44when the cantilever detent assembly46is assembled. The portions of the reverse gear engaging lever44forming the opening56in the reverse gear engaging lever44are disposed around the outer wall84of the detent housing70.

In addition, when the cantilever detent assembly46is assembled, the legs72,74,76,78are each disposed through a mating hole72C,74C,76C,78C formed through the side plate66. The retainer ring68is disposed in an indentation92formed in the outer wall84of the detent housing70. A lip72D,74D,76D,78D formed on each of the legs72,74,76,78locks each leg72,74,76,78to the retainer ring68.

In addition, when the cantilever detent assembly46is assembled, the ball62is disposed adjacent to a pair of the retainer walls. In the embodiment illustrated inFIGS. 3A and 3B, the ball62is disposed adjacent to the first retainer wall72A of the first leg72of the detent housing70, and the ball62is disposed adjacent to the second retainer wall74B of the second leg74of the detent housing70. The spring plate64, which is fixedly attached to the detent housing70is disposed adjacent to the ball62. Thus, the retainer walls72A,72B cooperate with the spring plate64, the reverse gear engaging lever44, and the side plate66(which is held to the detent housing70by the retainer ring68) to hold the ball62at least partially within the detent housing70.

Referring now toFIGS. 4A-4B and 5A-5B, the motion of the cantilever detent assembly46will be described in further detail. As can be seen inFIGS. 4A and 5A, the spring plate64extends into a central cavity94formed in the detent housing70. InFIGS. 4A-4B, the ball62is disposed in the first groove58of the reverse gear engaging lever44. A wall96of the spring plate64biases the ball62into the first groove58of the reverse gear engaging lever44, and the spring plate64is disposed in a horizontally flat orientation (in the orientation ofFIG. 4A). In other words, the spring plate64is parallel to or collinear with a central axis X of the detent housing70. When the ball62is biased into the first groove58, the lever is in a neutral position or in fifth gear, and the reverse gear engaging lever44is in a first position97. As shown in solid lines inFIG. 2in the first position97(also, the first position97is shown inFIGS. 4A-4B), the reverse gear engaging lever44is in a vertical position. The reverse gear engaging lever44, however, is configured to rotate with respect to the detent housing70, the bracket48and the spring plate64. Thus, the portions of the reverse gear engaging lever44forming the opening56rotate around the outer wall84of the detent housing70.

FIG. 4Cillustrates the position of the lever44with respect to the pin53in close-up detail, when the lever44is in the first position97.

Referring now toFIGS. 5A-5B, the reverse gear engaging lever44is rotated into a second position98(also shown in dashed lines inFIG. 2). In the second position98, the reverse gear engaging lever44has been rotated about the pivot point P, around the detent housing70. Accordingly, the raised portion61of the reverse gear engaging lever44is moved so that it is disposed under the ball62, and the ball62is disposed directly between the raised portion61and the center C of the wall96of the spring plate64. In the second position98, the ball62is no longer seated in the first groove58, nor is the ball62seated in the second groove60. Moving the reverse gear engaging lever44so that the ball62is disposed atop the raised portion61in the second position98forces spring plate upward and out of the horizontally flat orientation, so the spring plate64extends in an acute angle α from horizontal (in the orientation ofFIG. 5A). In other words, the spring plate64extends at an angle α from the central axis X of the detent housing70. For example, the spring plate64extends at an angle α between 5 and 45 degrees from the central axis X of the detent housing70. InFIGS. 5A-5B, the reverse gear engaging lever44has been rotated about the detent housing70from the first position97to the second position98. The ball62has remained along the plane A-A, but has translated in an upward direction (in the orientation ofFIG. 2) along the plane A-A within the opening56of the reverse gear engaging lever44.

FIG. 5Cillustrates the position of the lever44with respect to the pin53in close-up detail, when the lever44is in the second position98.

The reverse gear engaging lever44may then be rotated further from the first position97into a third position99, shown in dashed lines inFIG. 2. The third position99is rotated further from the first position97than the second position98. In the third position, the reverse gear engaging lever44has been rotated about the pivot point P, around the detent housing70a greater radial distance from the first position97than the second position98. In other words, the reverse gear engaging lever44is turned a first radial distance A from the first position97to the second position, and the reverse gear engaging lever44is turned a second radial distance B from the first position97to the third position99(through the second position98), where the second radial distance B is greater than the first radial distance A.

Accordingly, going from the first position97to the third position99, the reverse gear engaging lever44is rotated first so that the raised portion61of the reverse gear engaging lever44is disposed under the ball62, and the ball62is disposed directly between the raised portion61and the center C of the wall96of the spring plate64(as shown inFIGS. 5A-5B), and then the reverse gear engaging lever44is rotated further into the third position99so that the ball62is disposed, or seated, in the second groove60, as shown inFIGS. 6A-6B. In the third position99, the ball62is no longer seated in the first groove58, nor is the ball62located atop the raised portion61; instead, the ball62is seated in the second groove60in the third position99. Moving the reverse gear engaging lever44so that the ball62is seated in the second groove60in the third position99allows the spring plate64to come back down from its location in the second position98, so that the spring plate64is again in a horizontally flat orientation as shown inFIG. 6A. In other words, the spring plate64is parallel to or collinear with a central axis X of the detent housing70. The spring plate64biases the ball62into the second groove60in the third position99. InFIGS. 6A-6B, the reverse gear engaging lever44has been rotated about the detent housing70from the first position97, through the second position98, to the third position99. The ball has remained along the plane A-A, but has translated in an upward direction (in the orientation ofFIG. 2) along the plane A-A, and then in a downward direction along the plane A-A, within the opening56of the reverse gear engaging lever44.

Referring now toFIG. 6C, the pin53is illustrated in the slot42in the reverse gear engaging position99, at a distal end110of the second channel54, adjacent to an end face112. To move from the reverse gear speed to a neutral position (or the forward gear), the pin53must be moved into a neutral position at the intersection of the first and second channels at the corner101of the L-shaped slot42. However, upon attempting to translate the pin53along a horizontal axis V, as the shift rail20and yoke34move along parallel horizontal axes, the pin53exerts pressure on a side surface113of the second channel54, without immediately translating into the neutral corner101.

Referring toFIGS. 4B and 5B, the lever44then exerts enough force on the ball62and spring plate64to move the raised portion61of the lever44under the ball62and spring plate64, and into the second position98illustrated inFIGS. 5A-5B. Referring toFIG. 5C, the lever44then moves with respect to the pin53, such that the pin53is then located at a position nearly at the intersection of the first and second channels52,54, adjacent to the inner corner111of the L-shaped slot42. The pin53always remains disposed along the horizontal axis V, but the pin53may translate along the axis V.

After moving to the second position98, the lever44moves further back toward the first position97, so that the ball62seats in the first groove58in the first position97(as inFIGS. 3A-3B). Referring toFIG. 4C, as the ball62is seated in the first groove58, the lever44is moved further with respect to the pin53from the position ofFIG. 5Cto the neutral position at the wherein the pin53is located at the corner101of the lever44, wherein the first and second channels52,54meet. Accordingly, the cantilever detent assembly46, including the lever44having first and second grooves58,60, assists the pin53in returning to the neutral position after engaging the reverse gear18, because the lever44is translated with respect to the pin53, moving the surface113away from the pin53, such that the pin53rests in the corner101located a distance g from the surface113of the lever44.

Thus, the reverse gear engaging lever44is rotated about the pivot point P, and the first groove58is located a first distance D1from the pivot point P, while the second groove60is located a second distance D2from the pivot point P. The first and second distances D1, D2may be equal in magnitude, but they are not oriented along the same plane from the pivot point P. In other words, the planes disposed along the first and second distances D1, D2intersect at the pivot point P and are not coplanar. In addition, the grooves58,60are not located at the same point as the pivot point P; instead, each of the grooves are located a distance D1, D2away from the pivot point P.

The ball62is, therefore, configured to selectively seat in the first groove58, and the ball62is further configured to selectively seat in the second groove60, as the reverse gear engaging lever44is rotated around the detent housing70and the pivot point P. The spring plate64is configured to selectively bias the ball62into the first groove58, and the spring plate64is further configured to selectively bias the ball62into the second groove60. The reverse gear engaging lever44is moveable with respect to the ball62to seat the ball62in the first and second grooves58,60. Therefore, the cantilever detent assembly46selectively engages the reverse idler gear18when the reverse gear engaging lever44is rotated. The reverse idler gear18is disengaged when the reverse gear engaging lever44is in the first position97, and the reverse idler gear18is engaged when the reverse gear engaging lever44is in the third position99.

Referring now toFIG. 7A, the shifting assembly11is illustrated in a neutral position, as shown inFIG. 1and partially inFIGS. 2(solid lines),4A and4B, with neither the reverse idler gear18nor the forward gear19, which causes the transmission to operate in a fifth forward gear speed ratio in this embodiment, engaged. In the neutral position, the reverse gear engaging lever44is disposed in the first position97(substantially vertical), described above with respect toFIGS. 2, 4A, and 4B.

In the neutral position, the pin53is disposed in the L-shaped slot42at a position where the first and second channels52,54meeting, in the corner101of the “L” shape.

The first shift rail20defines a primary axis Y along the length of the first shift rail20. The first shift rail20is configured to translate in a first direction Y1along the primary axis Y and in an opposite second direction Y2along the primary axis Y. In the neutral position, the shift rail20is located in a neutral axial position, which is illustrated as being a distance N1from a shift detent screw49that is fixed to the transmission case12shown inFIG. 1, measured from an end104of the shift rail20along a line parallel to the primary axis Y. In other words, N1is measured along an axis parallel to the primary axis Y, from the end104of the shift rail20to a plane extending vertically through the shift detent screw49.

The forward gear19for establishing a fifth forward gear speed ratio is not illustrated inFIG. 7A, but it should be understand that the gear19would be located at a distance from the shift fork26and not being engaged by the first shift fork26when the shift rail20is in the neutral position of the first shift rail20.

Referring toFIG. 7B, the shifting assembly11is illustrated in a forward gear engagement position, wherein the forward gear19(shown inFIG. 1) for the fifth forward gear is engaged. However, as stated previously, the forward gear19could alternatively be used for engaging another forward gear speed, other than fifth gear, if desired.

In the forward gear engagement position, the pin53of the first yoke34is disposed in the first channel52of the L-shaped slot42of the reverse gear engaging lever44. In the forward gear engagement position, the pin53has been slid from the neutral position in the L-shaped slot42, where the first and second channels52,54meet, to a proximal end100of the first channel52and adjacent to an end face102of the first channel52.

InFIG. 7B, the shift rail20has been translated along the primary axis Y in the first direction Y1to the forward gear engagement position. In the forward gear engagement position, the end104of the shift rail20is disposed a distance F1from the plane extending vertically through the shift detent screw49, measured along a line parallel to the primary axis Y. As the shift rail20translates along the primary axis, the first shifting yoke34also translates along a straight line parallel to or collinear with the primary axis Y, in first and second directions that are parallel to or collinear with the first and second directions Y1, Y2.

The forward gear19for establishing a fifth forward gear speed ratio is not illustrated inFIG. 7B, but it should be understand that the gear19would be located in contact with the first shift fork26(or an extension thereof, such as clutch32) and would be engaged by the first shift fork26when the shift rail20is in the forward gear engagement position. Thus, the first shift fork26is configured to cause the transmission10to shift into a forward (fifth) gear speed ratio when the shift rail20is translated in the first direction Y1to the forward gear engagement position.

In the forward gear engagement position, the reverse gear engaging lever44remains in the vertical position, the first position97, illustrated inFIGS. 2, 4A, and 4B. The reverse gear engaging lever44remains stationary when the pin53is sliding or disposed in the first channel52. Accordingly, the reverse gear18is disengaged when the forward gear19is engaged. Thus, the shifting assembly11is configured to shift the transmission10into the fifth forward gear speed ratio when the pin53of the yoke34is disposed at the proximal end100of the first channel52, adjacent to an end face102of the first channel52. It should be understood, however, that the forward gear19could be engaged when the pin53is located anywhere in the first channel52away from the corner101, if desired, and the pin53does not necessarily need to be located adjacent to the end face102to engage the forward gear19to establish a forward gear ratio.

Referring toFIG. 7C, the shifting assembly11is illustrated in a reverse gear engagement position, wherein the reverse idler gear18(shown inFIG. 1) is engaged, such that the transmission10operates in a reverse gear ratio.

In the reverse gear engagement position, the pin53of the first yoke34is disposed in the second channel54of the L-shaped slot42of the reverse gear engaging lever44. In the reverse gear engagement position, the pin53has been slid from the neutral position in the L-shaped slot42, where the first and second channels52,54meet at the corner101, to a distal end110of the second channel54and adjacent to an end face112of the second channel54. The pin53may have previously been located in the first channel52, for example, in the forward gear engagement position explained above.

InFIG. 7C, the shift rail20has been translated along the primary axis Y in the second direction Y2to the reverse gear engagement position. In the reverse gear engagement position, the end104of the shift rail20is disposed a distance R1from the plane extending vertically through the shift detent screw49, measured along a line parallel to the primary axis Y.

The forward gear19for establishing a fifth forward gear speed ratio is not illustrated inFIG. 7C, but it should be understand that the gear19would be located at a distance from the first shift fork26(or an extension thereof, such as clutch32) and would not be engaged by the first shift fork26when the shift rail20is in the reverse gear engagement position. Accordingly, the forward gear19is disengaged when the reverse gear18is engaged. As illustrated inFIGS. 7A-7C, F1>N1>R1, and therefore, the first shift fork26is farther away from the fifth gear wheel19(seeFIG. 1) in the reverse gear engagement position than in the neutral position of the first shift rail20.

In the reverse gear engagement position, the reverse gear engaging lever44is rotated about the pivot point P as explained above to the third position99, illustrated inFIGS. 2, 6A, and 6B. The reverse gear engaging lever44rotates when the pin53is sliding or disposed in the second channel54away from the intersection of the first and second channels52,54. The shifting assembly11is configured to shift the transmission10into the reverse gear speed ratio when the pin53of the yoke34is disposed at the distal end110of the second channel54, adjacent to the end face112of the second channel54. It should be understood, however, that reverse gear engaging lever44could be rotated, and the reverse gear ratio engaged, when the pin53is located anywhere in the second channel54away from the neutral position at the corner101, if desired.

When the shifting assembly11is in the reverse gear engagement position, an extension114of the reverse gear engaging lever44is configured to engage the reverse gear18.

It will be appreciated that the location and particular embodiments of the shift rails20,22,24and yokes34,36,38could have various other configurations without departing from the spirit and scope of the present disclosure. In addition, the particular embodiments of the cantilever detent assembly46illustrated in the figures could have variations within the spirit and scope of the claims. The description of the invention is merely exemplary in nature and variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.