Abstract: A wheel bearing and hub system (WBHS) that functions to facilitate a vehicle wheel hub and tire to rotate with an axle. The WBHS includes a wheel bearing assembly and a wheel hub. The bearing assembly has an outer member with inward extending slots and an inner member that is located and secured within the outer member. The inner member has an outer race, an inner race, a plurality of ball bearings and a retainer within a channel between the hub races, and a center opening. The wheel bearing assembly is inserted into the center of the wheel hub, which has a front member and a rear member. An axle is then inserted into and attached within the channel, thereby facilitating the rotation of the axle and wheel hub.

Abstract: Cylindrical roller bearings and methods for the production thereof are disclosed, wherein the cylindrical roller bearings can be manufactured inexpensively and with adequately high quality. The cylindrical roller bearing may have an inner ring, an outer ring, and a multiplicity of cylindrical rollers, wherein the cylindrical rollers are arranged between the inner ring and the outer ring. The outer ring has an internal raceway for the cylindrical rollers, a fixed-rim portion, and a flanged-rim portion. The inner ring has an external raceway for the cylindrical rollers, and the internal raceway and/or the external raceway are/is formed into a final contour by extrusion.

Abstract: An apparatus for providing a load on a bearing mounted to a shaft which includes an attaching member releasably connectable to a shaft and a press mechanism coupled to the attaching member. The press mechanism is configured to provide a compressive load to the bearing. An aligning ring has an aligning projection configured to engage a shaft slot of the shaft to align the press mechanism relative to the shaft when the attaching member connects to the shaft. The projection extends radially inwardly from a circumferential portion of the aligning ring. The aligning ring extends circumferentially around the attaching member and is rotatable relative to the attaching member. The aligning ring includes a plurality of ring indicating markings to allow an alignment of a ring indicating marking of the plurality of ring indicating markings with a lock nut connected to the shaft.

Abstract: A pneumatic bearing assembly for a linear guide rail system. The pneumatic bearing assembly provides a substantially frictionless bearing surface between the bearing assembly and the linear guide rail system. The bearing assembly includes a bearing housing to support a payload on the guide rail system and a bearing insert in an interior chamber of the housing. A plurality of pneumatic passages communicate a pressurized pneumatic source through the bearing housing to an interior surface of the bearing insert. The unique orientation of the plurality of pneumatic passages distributes the pressurized pneumatic source to provide a pneumatic cushion between the bearing assembly and the linear guide rail system.

Abstract: A system comprising a turbomachinery provided with a casing and having a rotor mounted on a shaft supported for rotation in the casing; the shaft is associated to a plurality of active magnetic bearings adapted to support the shaft in the casing and associated to a control system through a plurality of wires wherein the control system is housed in a control system compartment external to the casing and located in proximity thereto.

Abstract: A trunnion bearing includes an inner ring that has a first exterior surface and a first interior surface. The first exterior surface has a spherical contour. The trunnion bearing includes an outer ring that has a second interior surface and a second exterior surface. The second interior surface has a spherical contour. The inner ring is disposed at least partially in the outer ring. A metallic liner made of a copper based alloy is disposed between the first exterior surface of the inner ring and the second interior surface of the outer ring. The inner ring and/or the outer ring are made from a titanium based alloy.

Abstract: A bearing arrangement for a unit that is mutually turnable around a centre of rotation (R) comprising an external part (1) and an internal part (7), which, with the aid of high hydraulically acting pressure, is arranged to achieve a reciprocating rotary motion, or that is arranged to achieve a high hydraulic pressure from an applied torque from a reciprocating motion, whereby the external part (1) is provided with side walls arranged to axially surround at least a part of the internal part (7), and whereby the external part (1) comprises a radially inwardly arranged and essentially surrounding cavity (11, 12, 13, 14) in which the internal part (7) is arranged such that it can be rotated, which cavity (11, 12, 13, 14) is limited in the circumferential direction by at least one wing (3, 4) that protrudes inwards from the external part (1) and also limited by at least one wing (9, 10) that protrudes radially outwards from the internal part (7), which wings (3, 4, 9, 10) limit at least two chambers or compartment

Abstract: A ball bearing cage, comprising a plurality of rolling body pockets each formed by portions of encircling side rings and webs connecting the side rings, wherein the rolling body pockets are configured to guide a respective rolling body with play in a circumferential direction, wherein the rolling body pockets include lateral guide contours that are parallel to the side rings and further include inwardly protruding corner projections configured to make contact with the rolling body.

Abstract: A radial support bearing assembly for use within a steering column assembly having an outer tube and a shaft, including at least one inner ring defining an inner raceway, the inner ring being axially fixed relative to the shaft, at least one outer ring defining an outer raceway, and a plurality of roller elements disposed between the at least one inner ring and the at least one outer ring in rolling contact with the inner raceway and the outer raceway. The inner ring is in direct contact with the shaft and has a circular cross-section as taken in a plane parallel to a longitudinal center axis of the shaft.

Abstract: A seal for sealing between a trunnion and bearing cup of a joint member includes a main annular body. A plurality of annular lips extend radially inwardly from the main body. The lips are configured for engaging an outer bearing surface of the trunnion. A first one and a second one of the lips slope in a first direction with respect to the outer bearing surface of the trunnion and a third one of the lips slope in a second direction with respect to the outer bearing surface of the trunnion.

Abstract: A detachable slat angle adjustment mechanism includes a casing, a worm wheel rotatably mounted in the casing, and a worm shaft set including a first shaft member and second shaft member. The first shaft member is rotatably mounted in the casing and includes a worm meshed with the worm wheel and a coupling portion with an axle hole axially defined therein and two opposing positioning hole connected to the axle hole. The second shaft member has a mounting axle axially extended from a top end thereof and detachably insertable into the axle hole of the first shaft member, two positioning protrusions respectively protruded from the outer perimeter of the mounting axle and detachably engageable into the respective positioning holes of the first shaft member, and an opposing bottom end that suspends outside the casing after connection of the mounting axle to the axle hole of the first shaft member.

Abstract: A shaft-hub connection includes a shaft, which is provided with an external toothing arrangement in a connecting region. The shaft-hub connection also includes a hub, which is provided with an internal toothing arrangement in a connecting region. The external toothing arrangement has a first tip diameter (K1) on the side facing the axial end of the shaft and a second, larger tip diameter (K2) on the side of the connecting region facing away from the axial end so that together with the internal toothing arrangement of the hub a clearance fit is created in the region of the first tip diameter (K1) and an interference fit is created in the region of the second tip diameter (K2).

Abstract: A wheel drive unit for a vehicle is provided. The wheel drive unit includes: a connecting member that is separably coupled to a constant velocity joint and fixes a bearing to the constant velocity joint when mounted on the constant velocity joint; a hub housing that can be opened or closed by a hub cap and forms an inner space where the constant velocity joint is disposed and coupled with the hub housing by a bearing. In particular, the hub cap allows the connecting member to be separated from or mounted on the constant velocity joint when the hub cap is separated from the hub housing such that inner components of a wheel drive unit can be easily replaced and repaired.

Abstract: A ball cage for universal use both in a cross-groove type plunging constant velocity joint and in a cross-groove type fixed constant velocity joint has an external contour with sections of different curvature. Axial edge sections of the external contour are designed as spherical sections located on the circumference of an imaginary sphere, whereas a center section of the external contour located axially between the edge sections runs radially inside the diameter of the imaginary sphere.

Abstract: A flexible coupling between two shafts, including a spacer element inserted between the actuating shaft or drive shaft and the actuated shaft or load shaft, and an assembly of articulated connecting rods at both points of connection (between the drive shaft and the spacer element and between same and the load shaft), said articulated connecting rods respectively linking the two elements to be connected, being tangentially arranged in relation to the coupling shaft and angularly spaced around same, a circumferential phase shift of 60°, all of the connecting rods on both ends being articulated in ball joints used to facilitate the rotation of the connecting rods in any direction, so that the coupling can adapt itself to all of the potential disalignments that may occur, both radially and axially, or When there is play between the spacer and the load, since, on the opposite side, an axially arranged connecting rod prevents the occurrence of axial play between same.

Abstract: A clutch includes a hub and a carrier concentric with the hub. One of the hub and the carrier defines a circular groove and the other of the hub and the carrier defines a tapered surface. A plurality of arcuate segments collectively define a ring that has a first edge disposed on the tapered surface and a second edge disposed in the groove. Each of the segments defines a first locating feature. An annular resilient member is seated on each of the segments and includes second locating features each connecting with one of the first locating features to secure the segments in a desired circumferential position relative to each other.

Abstract: A disk brake actuated preferably by compressed air, for a motor vehicle, includes an application mechanism. The application mechanism has a brake rotary lever which acts on a traverse in which there is arranged at least one readjusting spindle which acts on an application-side brake pad, having a readjusting device, and having a quick contact apparatus. The quick contact apparatus effects an advancing movement which is superposed on an actuation of the disk brake during the phase of overcoming an air gap. The quick contact apparatus has an intermediate element which is variable in terms of its position and which has at least a wedge-shaped design.

Abstract: A brake assembly for a wheel on a vehicle includes a brake disc, a caliper assembly operably coupled to the brake disc, a brake line fluidly coupled to the caliper assembly, and a brake shield positioned adjacent a portion of the caliper assembly. The brake shield includes a first arm positioned on a first side of a portion of the brake disc and a second arm positioned on a second side of the portion of the brake disc. The brake disc further includes a recess configured to receive a portion of the brake line.

Abstract: A caliper comprising: (a) an inboard side; (b) an outboard side; and (c) a bridge extending between and connecting the inboard side to the outward side, the bridge including: (i) an upper wall; (ii) a lower wall; and (iii) one or more side walls extending between and connecting the upper wall to the lower wall so that one or more hollow recesses are located between and formed within the bridge; wherein the upper wall and the lower wall are connected only via the one or more side walls.

Abstract: A brake pad for a disk brake for a utility vehicle, includes a pad backplate, which has a pad side with a frictional mass and an application side opposite the pad side. The pad side is provided with a structural arrangement having a plurality of recesses with elevations arranged therein. The structural arrangement of the pad side comprises structural elements which differ in shape and size.

Abstract: A disc brake for a vehicle, in particular for a commercial vehicle, is provided. The disc brake includes at least one application-side brake pad and a back-side brake pad held in a form-fitting manner in a brake carrier. At least the application-side brake pad is provided with at least one pad-retaining spring which is supported at least on one brake carrier horn of the brake carrier and exerts a radially outwardly acting tensile force on the brake pad.

Abstract: A method for sealing a spring comprising providing a spring device, locating an activatable material within the spring device activating the activatable material, and installing the spring device into a desired location after activating the activatable material.

Abstract: The present disclosure concerns a spring device with a piston and a housing into which the piston can be introduced in a movement direction. A cavity is formed between the piston and the housing, in which cavity a compressible solid body spring is arranged that consists of a solid body that can be compressed by the piston. At least one surface of the piston that faces the solid body spring is conical or concave. The disclosure furthermore concerns a securing device comprising such a spring device and the use thereof, in particular for a container closing plug.

Abstract: The present invention relates to spring systems for subsea applications and in equipment projects for the oil and gas industry. The spring systems according to the present invention are preferably manufactured from composite materials and comprise at least one pair of springs (3) consisting of a first spring component (1) and a second spring component (2), mounted so as to offer a first central contact region (4) and double curvature and rebound areas forming a coupling (6), said pair of springs (3) being, thus, self-centering.

Abstract: A shock absorber with lubricated bearings for an aircraft landing gear includes a piston that is received in a cylinder, and an upper bearing fixed to the piston that slidably engages an inner surface of the cylinder. A lower bearing extends inwardly from a lower portion of the cylinder and engages an outer surface of the piston. The lower bearing has a center axis and defines an annular bearing surface configured to slidably engage the piston outer surface. The annular bearing surface has a first portion that extends circumferentially more than one hundred eighty degrees about the center axis at a constant radius, defining a circular annular segment. A second portion closes the circular annular segment and defines a shallow channel or pocket in the annular bearing surface. In some embodiments the lower bearing further comprises oppositely disposed frustoconical thrust portions.

Abstract: Seat-damping devices, systems, and methods for damping vibrations are disclosed. A fail-safe permanent magnet is used with an electromagnet to create damping of induced vibrations in a seat-damping device using magnetorheological, electrorheological, magnetically responsive powders and other magnetically responsive materials.

Abstract: A damper includes a coil that generates a magnetic field acting on magneto-rheological fluid flowing through a communication passage. A piston includes a concave portion formed on an outer peripheral surface of a piston core, a regulating member housed in the concave portion, an introduction flow passage that guides the magneto-rheological fluid in a first fluid chamber or a second fluid chamber into the concave portion such that the regulating member projects into the communication passage, and a fail valve that opens and closes the introduction flow passage. In the case where a current applied to the coil is a predetermined value or less, the regulating member projects into the communication passage.

Abstract: A flexplate assembly comprising a central plate having a general disc shape disposed about and extending radially from an axis. The central plate has a first radial width. A ring gear is annularly secured about the central plate and presents an outer circumference that defines a plurality of ring teeth extending therefrom. At least one noise plate is disposed adjacent to the central plate and extends circumferentially about the axis for reducing vibrations and noise from the flexplate assembly. The noise plate has a second radial width that is at least one half of the first radial width of the central plate. A method of constructing such a flexplate assembly is also provided.

Abstract: A torsional vibration damper includes a torque input member including a radially oriented first side plate and at least one supporting member mounted thereto, and a unitary radially resilient output member elastically coupled to the torque input member. The resilient output member includes at least one elastic blade configured to elastically and radially engage the at least one supporting member. The elastic blade has a raceway is configured to bear the at least one supporting member. The at least one elastic blade and a blade insert non-moveably secured to the main body. The blade insert radially engages the at least one supporting member. The raceway is defined by a radially outer surface of the blade insert.

Abstract: Toothed belt drive having one toothed belt and at least two, preferably helically geared, toothed pulleys, wherein the toothed belt wraps the toothed pulleys over a part-region of the circumference of the latter and the teeth of the toothed belt mesh in the tooth gaps of the toothed pulleys, wherein the air gap ES or ES(mk) that relates to the nominal pitch P and results from the difference between the width es of the tooth gaps of the respective toothed pulley and the width eR of the teeth of the toothed belt is configured at the mean height of the teeth, depending on the tooth count zR of the toothed pulleys and on the tooth count z of the toothed pulleys, or on the tooth counts zk of the smaller toothed pulley and on zg of the larger toothed pulley, respectively.

Abstract: A ratchet turnbuckle for expanding or contracting the distance between tethered workpieces. The ratchet turnbuckle includes an end fitting having a pair of stabilizer bars and a swivel unit.

Abstract: A transmission (1) for a motor vehicle includes at least one input shaft (2) which can be connected to an internal combustion engine (VM) in a rotationally fixed manner and with at least one input shaft power transmission element, a first shaft (3) including at least one power transmission element, a second shaft (4) including at least one other power transmission element, and a transmission output shaft (5) which is engaged with the first shaft (3) and the second shaft (4). The transmission (1) includes at least one gear plane (RE), in which the at least one input shaft power transmission element is engaged with the at least one power transmission element and with the at least one other power transmission element. The transmission (1) includes precisely two gear planes, and the power transmission element and the other power transmission element are each an idler gear.

Abstract: A vehicular multi-stage transmission includes: input and output shafts; first, second, third and fourth planetary gear devices each including first, second and third rotary elements; and seven shifting elements connected to the rotary elements of the four planetary gear devices. In particular, the second rotary element of the first planetary gear device PG1 is selectively connected to a transmission case by a first shifting element while being selectively connected to the input shaft, and the secondary rotary element of the first planetary gear device is selectively connected to the third rotary element of the second planetary gear device, the first rotary element of the third planetary gear device, and the first rotary element of the fourth planetary gear device. In addition, the third rotary element of the first planetary gear device is fixedly connected to the second rotary element of the second planetary gear device.

Abstract: A multi-stage transmission for a vehicle is provided. The multi-stage transmission includes an input shaft and an output shaft. A first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set each have three rotary elements and transmit torque between the input shaft and the output shaft. At least six shifting elements are connected with the rotary elements of the planetary gear sets. Accordingly, fuel efficiency is improved by implementing multi-stages in an automatic transmission and vehicle driving comfort is improved by using operating points in a low RPM range of an engine.

Abstract: A planetary gear train of an automatic transmission for a vehicle provides at least eight forward speeds and one reverse speed by combination of: first to fourth planetary gear sets respectively having first to third rotational elements, fourth to sixth rotational elements, seventh to ninth rotational elements, or tenth to twelfth rotational elements; two transfer gears and five control elements selectively connecting one shaft to another shaft selected from first to tenth shafts or to a transmission housing. In particular, the input shaft is mounted with the first, second, and third planetary gear sets at an external circumference of the input shaft; the output shaft is mounted with the fourth planetary gear set on external circumference of the output shaft, and the tenth rotational element is externally gear-meshed with one shaft selectively connected with the second rotational element, the seventh rotational element, and the ninth rotational element respectively.

Abstract: A planetary gear train of an automatic transmission provides at least eight forward speeds and one reverse speed by combination of: first to fourth planetary gear sets respectively having first to third rotational elements, fourth to sixth rotational elements, seventh to ninth rotational elements, or tenth to twelfth rotational elements; and two transfer gears and five control elements selectively connecting one shaft to another shaft selected from first to tenth shafts or to a transmission housing. In particular, the input shaft is mounted with the first, second, and third planetary gear sets, the output shaft is mounted with the fourth planetary gear set, the eleventh rotational element is externally gear-meshed with the eighth rotational element and fixedly connected with the output shaft, and two transfer gear units are respectively arranged between the fifth and tenth rotational elements and between the eighth and eleventh rotational elements.

Abstract: A planetary gear train of an automatic transmission for a vehicle provides at least ten forward speed stages and one reverse speed stage by combination of: first to fourth planetary gear sets respectively having first to third rotation elements, fourth to sixth rotation elements, seventh to ninth rotation elements, or tenth to twelfth rotation elements; first to eighth shafts; at least four clutches and two brakes. In particular, the first shaft is fixedly connected to the first and fourth rotation elements and selectively connected to a transmission housing, the second shaft is fixedly connected to the second rotation element and an input shaft, the third shaft is fixedly connected to the fifth, eighth and twelfth rotation elements, the fourth shaft is fixedly connected to the ninth and tenth rotation elements and selectively connected to the input shaft.

Abstract: Disclosed is a transmission for a vehicle that can improve fuel efficiency by implementing multiple steps of shifting and improve vehicle driving comfort by using operating points in a low RPM range of an engine. According to the transmission, since three single planetary gear sets and one compound planetary gear set are combined or five single planetary gear sets are compound and the rotary elements of the planetary gear sets and friction members are selectively connected and disconnected, their rotational speeds and directions are changed when shifting is performed. Therefore, a vehicle can be driven with the gear ratios of ten or more steps of forward shifting and one step of reverse shifting.

Abstract: A vehicle transmission is provided that improves fuel efficiency through multiple speed stages and enhances silent drivability of a vehicle using an operating point in a low RPM range of an engine. The vehicle transmission combines three simple planetary gear units with a single compound planetary gear set or combines five simple planetary gear units to shift gears while changing rotational speeds and directions by a selective intermittence operation using rotation elements of the planetary gear units and a plurality of friction elements. Through such a shift operation, it is possible to form at least forward 10-speed or more and reverse 1-speed gear ratios for driving of the vehicle.

Abstract: A transmission arrangement (1) for the controllable distribution of drive torque from an input element (2) to at least one output element (3), comprising a first transmission part region (4), namely a planetary gear mechanism, and an additional drive unit (5), the first transmission part region (4) being drive-connected directly or indirectly to the input element (2) and to the additional drive unit (5), and the first transmission part region (4) being drive-connected directly or indirectly to the output element (3).

Abstract: A traction mechanism tensioning unit (1) for a traction mechanism drive of a motor vehicle is provided. The traction mechanism tensioning unit (1) includes a housing (2) in which a hydraulic tensioner (3) is arranged, the hydraulic tensioner (3) has a cylinder element (4) connected rigidly to the housing (2), in which an axially moving piston (5) is arranged, a compression spring (18) is arranged for generating an axial tensioning force on the piston (5) in a compression chamber (6) formed between the cylinder element (4) and the piston (5), and the hydraulic tensioner (3) is fluidly connected to a pressurized medium supply line (8) via a pressure control valve (7) arranged in the housing (2) for realizing a constant pressurized medium pressure in the compression chamber (6).

Abstract: A hydraulic tensioner for an internal combustion engine for tensioning a span of a chain or a belt has a piston with an internal reservoir connected to a high pressure chamber through a check valve assembly. The check valve assembly has a disk seat received within the hollow bore of the body of the piston having at least one passage connecting the internal reservoir to the hydraulic pressure chamber; a check valve retainer coupled to the disk seat; a check valve disk received between the disk seat and the check valve retainer moveable between a first position and a second position, and a check valve spring received between the check valve disk and the check valve retainer.

Abstract: A tensioner comprising a base having a cylindrical portion extending axially, the cylindrical portion comprising a radially outer surface and a receiving portion that is radially inward of the radially outer surface, an eccentric arm pivotally engaged with the radially outer surface, a torsion spring disposed within the radially inward receiving portion, the torsion spring applying a biasing force to the eccentric arm, and a pulley journalled to the eccentric arm.

Abstract: A tensioner comprising a base having a cylindrical portion extending axially, the cylindrical portion comprising a radially outer surface and a receiving portion that is radially inward of the radially outer surface, an eccentric arm pivotally engaged with the radially outer surface, a torsion spring disposed within the radially inward receiving portion, the torsion spring applying a biasing force to the eccentric arm, and a pulley journalled to the eccentric arm.

Abstract: The present invention is to provide a regulation mechanism capable of dynamically adjusting balance of tension on two sides of a multi-groove transmission belt between a driving wheel and a driven wheel, which includes a pivot balance plate pivotally connected to a transmission mechanism; two smooth idlers and a multi-groove idler pivotally connected on the pivot balance plate respectively and spaced apart from each other by a first gap and a second gap respectively; and a tension regulating rod rotatably disposed between the transmission mechanism and the pivot balance plate for dynamically adjusting balance of tension on the two sides of the multi-groove transmission belt, such that the multi-groove transmission belt can pass these gaps sequentially to wind on the driving wheel and the driven wheel, thereby the outer and inner side surfaces thereof are abutted with the smooth idlers and the multi-groove idler respectively.

Abstract: A chain belt for a continuously variable transmission which has a plurality of links and a plurality of coupling members which connect the plurality of links together. Each of the coupling members has a first end with a first bore and a second end with a second bore. A first retaining pin is fastened within the first bore of each of the coupling members and a second retaining pin is fastened within the second bore of each of the coupling members. The first and second retaining pins retain the plurality of links on the coupling member.

Abstract: The improved gearbox mechanism of the present invention includes a plurality of cam-actuated simplified gear block assemblies, which transfer power from a power shaft to a secondary or output gear element. Each gear block assembly includes a gear block having a surface that periodically interfaces with a secondary or output gear element. In a preferred embodiment the interface surface comprises a plurality of projections or teeth which correspond to complementary projections or gear teeth on the output gear element. Each gear block assembly further includes a gear block, a torque lever arm, cam followers and/or a socket, which connect or link the gear block to a cam assembly, which in turn is connected to a power source. The cam assembly includes about its circumference a unique pathway or groove for each linkage assembly of a particular gear block assembly so that the movement of the gear block may be controlled in two dimensions in accordance with a certain design parameter.

Abstract: A ball recirculation tube (4) forms a passage connecting two separated portions of a ball-rolling passage of a ball screw device (1) to cause balls (6) to recirculate. An outer portion (4a, 4b) of the ball recirculation tube (4) that constitutes an outer end located radially farthest from the center axis of a screw shaft (2) has an adjustable portion used to adjust the distance from the center axis of the screw shaft (2) to the outer end. This facilitates attachment of a member fitted on a nut and the ball recirculation tube (4).

Abstract: A vertical mill gearbox includes a drive shaft mounted in a casing for rotation about a rotation axis, and an intermediate shaft configured as a hollow shaft and mounted in the casing for rotation about a vertical second rotation axis. The intermediate shaft has a bevel gear meshing with a bevel-gear pinion of the drive shaft. A torsion shaft is received in fixed rotative engagement with the intermediate shaft and sized to extend beyond the intermediate shaft to define a projecting section to which a sun gear rotatably driven via the intermediate shaft is fixed. A planet carrier is mounted in the casing for rotation about the second rotation axis and rotatably supports an internal gear having an internal tooth system. Mounted to the planet carrier is a rotatable planet gear which meshes with the sun gear and with the internal tooth system of the internal gear.

Abstract: A drive clutch including a primary post, a fixed sheave, a movable sheave, an activation assembly is provided. The fixed sheave is statically coupled to the primary post. The movable sheave is slidably mounted on the primary post. The activation assembly is in operational communication with the movable sheave to move the movable sheave on the primary post away from and towards the fixed sheave based on a centrifugal force experienced by the drive clutch. The activation assembly includes a spider, at least one trunnion slidably mounted on a spider arm and a main activation biasing member. The at least one trunnion has opposable extending trunnion arms. A roller is rotationally mounted on each trunnion arm. Each roller is positioned to engage a ramp profile associated with a sheave post extending from the movable sheave. The main activation biasing member is positioned to assert a biasing force on the spider.