Abstract: Bearing assemblies and bearing apparatuses are disclosed. In an embodiment, a first bearing assembly includes tilting pads and a first plurality of sliding superhard bearing elements secured to a first support ring. In an embodiment, a second bearing assembly includes a substantially continuous bearing element secured to a second support ring. In an embodiment, a bearing apparatus includes the first bearing assembly and the second bearing assembly, with the substantially continuous bearing element generally facing the tilting pads. At relatively low rotational speeds, the first plurality of superhard bearing elements supports at least a portion of a load exerted on the bearing assembly. At relatively high rotational speeds, the tilting pads support at least a majority of the load.

Abstract: Bearing 10 includes: a half bearing member having an inner circumferential face that slides against an associated shaft, and a plurality of recesses provided in a first end face in an axial direction of the associated shaft; a first flange member having a plurality of projections provided at positions corresponding to the plurality of recesses provided in the first end face; and a plurality of staking marks formed in a periphery of each recess when each recess is staked in a state where each of the plurality of projections is fitted to a corresponding one of the plurality of recesses in the first end face to fix the first flange member to the half bearing member. When staking marks formed on both sides of at least one of the plurality of recesses are viewed in a radial direction of the associated shaft, a volume of a deformed portion near a staking mark located outside in a circumferential direction is smaller than a volume of a deformed portion close to a staking mark located inside.

Abstract: A shift mechanism includes a second driven gear, a first conical roller bearing and a second conical roller bearing, a biasing member, a first spacer, and a nut. The second driven gear meshes with a driving gear. The first and second conical roller bearings are disposed on an outer periphery of a tubular portion of the second driven gear in directions opposite from one another. The biasing member biases one of inner or outer races of the first or second conical roller bearings in directions separate from one another. The first spacer maintains a distance between the other ones. The nut holds the first conical roller bearing and the second conical roller bearing to the tubular portion of the second driven gear. One of the inner or outer races of the first and second conical roller bearings are relatively displaceable in an axial direction.

Abstract: One embodiment describes a bearing damper including a housing; a damper with an annular gap and an internal spring, in which the annular gap is formed between an inner rim and an outer rim of the damper, the internal spring circumferentially bounds the annular gap, the outer rim is coupled to the housing, and the annular gap is configured to be filled with fluid used to dampen vibrations produced on a drive shaft; and an external spring coupled to the housing and to the inner rim, in which the external includes an axial stiffness engineered to externally offset axial forces exerted on the inner rim of the and a radial stiffness engineered to externally offset a first portion of radial forces exerted on the inner rim and to permit a second portion of the radial forces to propagate the vibrations from the drive shaft to the inner rim.

Abstract: A sliding assistance device includes a base and at least one sliding assistance member mounted at the base. The base includes an end portion and a flexible portion bent from the end portion. A space is defined between the flexible portion and the end portion. One of the flexible portion and the end portion has a protruding section. The flexible portion and the end portion are configured to contact each other through the protruding section according to the space when a force is applied to the flexible portion of the base.

Abstract: A bearing assembly comprises a bearing, a shim disposed within the bearing, and a component disposed within the shim. The shim comprises a first material, the component comprises a second material, and the first material has an elastic modulus value that is lower than an elastic modulus value of the second material. An apparatus comprises an elastomeric bearing, a fiberglass shim, and a steel spindle that is connected to the elastomeric bearing through the shim. A method for reducing strain in an adhesive layer that connects a bearing to a component comprises selecting a shim material having an elastic modulus value that is less than an elastic modulus value of the component and providing instructions to connect the component to the shim by placing the adhesive layer between an outer surface of the component and an inner surface of the shim.

Abstract: A countershaft as disclosed herein may include one or more bearing zones along its axial length. Each bearing zone may include one or more radial holes in fluid communication with one or more grooves, respectively, and one or more axial channels formed along the longitudinal length of the countershaft. Each groove may be positioned adjacent an interface between a rotating member and a non-rotating member and include one or more features therein, such as a profile and/or taper.

Abstract: A bearing structure has a crankshaft rotatably supported by a crankshaft bearing part, formed of a cylinder block of an internal combustion engine and a first bearing cap, through a bearing metal, a second shaft rotatably supported by a second shaft bearing part formed of the first bearing cap and a second bearing cap, wherein the bearing metal has a bearing metal planar portion for rotatably supporting the crankshaft with an entire inner peripheral surface of the bearing metal, the inner peripheral surface at which the bearing metal planar portion is formed, a bearing metal oil groove portion formed with an oil groove formed to extend circumferentially in an inner peripheral surface of the bearing metal, the inner peripheral surface at which the bearing metal oil groove portion is formed, a first oil hole opening at the oil groove, and a second oil hole opening at the oil groove.

Abstract: Provided is a slide bearing with which friction can be reduced and the total amount of effluent oil can be reduced. In the slide bearing in which the halved members made by dividing the cylinder in two in the direction parallel to the axial direction are disposed vertically, the narrow grooves are provided at an end of the lower halved member in the circumferential direction from a mating surface on a downstream side of a rotation direction to a predetermined bearing angle and peripheral edge parts are provided outside the narrow grooves in an axial direction.

Abstract: In order to reduce friction of a crank shaft during operation by a large amount with low complexity through structuring sliding bearing surfaces (1) of the crank shaft through controlled introduction of microscopically small indentations (27) it is proposed for the center bearings and the crank bearings to only structure highly loaded portions of the bearing surface in circumferential direction and also in axial direction since this is already difficult to achieve in view of the operating gap towards the tool that only has a size of a few ?m.

Abstract: A seal for a bearing assembly, including: a longitudinal axis; a first portion arranged to engage an outer ring for the bearing assembly; and a second portion extending radially inward and in a first axial direction from the first portion. The second portion includes: a first lip arranged to contact a rotatable shaft passing through the bearing assembly; and a second lip located past the first lip in a second axial direction, opposite the first axial direction, and arranged to be separated, in a radial direction, from the rotatable shaft by a first distance.

Abstract: A center-bearing assembly includes an annular housing having a circumferential wall with a lip extending radially inward and includes a flange outboard of the circumferential wall. A roller bearing is sized to encircle a vehicle driveshaft and is disposed within the housing between the lip and the flange. An annular retainer is connected to the flange and includes an annular notch configured to shear in response to impact to the driveshaft allowing the bearing to release from the housing.

Abstract: A tubular device for connection to a shaft such that a torque can be transmitted between the tubular device and the shaft comprises a hollow receiving region configured to receive a first supporting region of the shaft, and at least one first torque-transmitting section configured to engage with at least one second torque-transmitting section of the shaft. The hollow receiving region includes at least one contact surface configured to engage at least one first supporting region of the shaft when the tubular device is radially mounted to the shaft. The at least one first torque-transmitting section includes at least one bump which, starting from the at least one first contact surface, projects into the hollow receiving region and is positioned immovably on the tubular device.

Abstract: An Oldham coupler assembly for transferring rotary power between two shafts in an imaging device. The Oldham coupler includes an input plate and an output plate made of plastic and a star plate made of metal moveably coupled to and positioned in between the input plate and the output plate. A plastic retraction spline assembly is slidably retained in the output plate and engages with a drive member in an imaging unit. The location of the retraction spline assembly on the output plate allows for an increased diameter leading to increased torsional stiffness. The input plate includes gear teeth integrally molded into the outer circumference thereof helping to decrease the overall width of the Oldham coupler. Pairs of wheels are fastened to inner faces of the input and output plates and used to moveably couple the star plate to the input and output plates.

Abstract: A gear spindle (3) obtained by inclining the axis of a spindle inner tube (10) provided at one end with an external cog inner tube gear section (40) at 0.6 degrees to 1.6 degrees with respect to the axis of a spindle outer tube (20) provided with an internal cog outer tube gear section (50) that meshes the inner tube gear section (40). On the teeth of the inner tube gear section (40) having a face width (B), a crowning of radius (Cr) is provided so that the center in the face width direction is expanded and both tooth ends are thin. The face width (B) and the crowning radius (Cr) are set within an area that is enclosed by graphs of (Cr)=1200 [mm], (Cr)=4000 [mm], (B)=0.0272×(Cr)+28 [mm], (B)=59.04×exp (0.0005×(Cr)) [mm], and (B)=32×(Cr)0.274 [mm].

Abstract: A universal joint includes a joint cross having a plurality of bearing journals, each bearing journal being supported in a bearing bushing by a plurality of trunnion bearing rolling elements, the universal joint also including a seal assembly configured to seal the journal cross against the bearing bushing. The bearing bushing includes a sleeve for slidingly supporting at least one seal lip of the seal assembly, the sleeve has an axially inner region facing the rolling elements, and the axially inner region has a radially inner portion and a radially outer portion. The radially inner portion is axially offset from the radially outer portion towards the rolling elements by an offset amount.

Abstract: A power transmission device includes coaxially a first rotary body including a first gear on a drive source side, a second rotary body including a second gear on a driven side, a third rotary body including a third gear movably held to transmit a driving force, and a guide member disposed at one of the first gear, the second gear, and the third gear to contact a first end surface of a gear tooth of another of the first gear, the second gear, and the third gear, serving as a mating gear, to guide the first end surface between teeth of the one of the first gear, the second gear, and the third gear. The guide member extends toward the mating gear and a tip of the guide member is placed at a distance from an end of the one of the gears in the axial direction.

Abstract: The torque coupling has a shaft, a hollow shaft and a plurality of levers. The bearings of the levers are non-rotatably connected to the shaft and the levers are spring-loaded so as to be pressed against the hollow shaft. The levers are bent from a steel strip.

Abstract: An Agricultural baler having a flywheel that is driven via a drive shaft. The flywheel is connected to a pressing component of the baler via a central shaft, wherein the flywheel is mounted over the central shaft via bearings. Further mounted on the central shaft is a shear pin flange which is connected via a shear pin to the flywheel for the purpose of transmitting a rotation movement of the flywheel to the central shaft, wherein the flywheel is held over the central shaft via first fixing component and wherein the shear pin flange is connected to the central shaft via second fixing component.

Abstract: A ball ramp plate assembly includes a first ball ramp plate and a second ball ramp plate coaxially aligned so that first and second ball pockets are opposed with rolling elements disposed in the opposing first and second ball pockets. A plug extends through the first ball ramp plate and the second ball ramp plate and engages both ball ramp plates to maintain the first ball ramp plate and the second ball ramp plate against displacement with respect to each other.

Abstract: In an approach to interlock braking, one or more driving wheels and one or more driven wheels are engaged to rotate in the same first direction. One or more braking wheels are driven by a power transmission mechanism associated with the one or more driving wheels. A first braking surface, associated with the one or more driven wheels, and a second braking surface, associated with the one or more braking wheels, engage. A braking force is generated by the engagement of the first braking surface and the second braking surface, and transmitted by the power transmission mechanism to the one or more driving wheels.

Abstract: A torque plate for heavy-duty vehicles includes a reduced size and structural features that enable the torque plate to be used in conjunction with a reduced diameter brake rotor. The torque plate is rigidly attached to an axle of the heavy-duty vehicle. The torque plate includes an axle ring that is formed with a thickness and an opening for receiving the axle, in which the axle ring engages an outer diameter of the axle. Each one of a pair of bodies is formed with a thickness and extends radially outwardly in opposite directions from the axle ring. Each body thickness is less than the axle ring thickness. Each one of a pair of carrier mounting bosses extends radially outwardly from a respective one of the bodies. The torque plate also includes a pair of anti-lock braking system sensor mounting bosses, and a pair of splash guard mounting bosses.

Abstract: A brake system comprising: (a) a body assembly comprising: (i) an outboard side, (ii) an inboard side, (iii) a bridge extending between and connecting the inboard side and the outboard side, and (iv) two or more piston assemblies located entirely on the outboard side, entirely on the inboard side, or located both on the inboard side and the outboard side; and (b) an electric brake assembly comprising: (i) one or more differential assemblies in communication with the body assembly and each of the two or more piston assemblies; wherein the one or more differential assemblies provide power equally to each of the two or more piston assemblies so that each of the piston assemblies are moved axially in unison until a resistance of one of the two or more piston assemblies becomes higher than a remainder of the two or more piston assemblies and the one or more differential assemblies transfer power from the piston assembly with the higher resistance to the remainder of piston assemblies with a lower resistance so tha

Abstract: The present invention relates to a method for making a brake disc comprising the following operating steps: a) providing a brake disc, comprising a braking band 2 made of aluminum or aluminum alloy and provided with two opposite braking surfaces 2a, 2b, each of which at least partially defines one of the two main sides of the disc; b) depositing a material in particle form on the disc with HVOF (High Velocity Oxygen Fuel) technique or with HVAF (High Velocity Air Fuel) technique or with KM (Kinetic Metallization) technique, forming a protective coating 3 which covers at least one of the two braking surfaces of the braking band. The material in particle form is composed of 80 to 90% by weight of tungsten carbide, 8% to 12% by weight of cobalt and 2% to 6% by weight of chromium.

Abstract: A protective member includes outer and inner layers interconnected by multiple connectors under tension along their longitudinal axis. The connectors absorb energy from an impact force by resisting further tension along their longitudinal axis, can elongate along their longitudinal axis and allow the layers to move relative to each other. The protective member can be used in numerous applications and environments, including for participants in sports, in applications including bumpers, passenger cabins, car seats, beds, torso protection, ships, gloves, footwear and items.

Abstract: The present invention relates to a vibration damper (10) for damping vibrations in a vehicle, in particular for damping bending vibrations, having: at least one vibrating weight (12), at least one fastening means (14), and at least one elastic connecting means (16), which connects the at least one vibrating weight (12) to the at least one fastening means (14), wherein at least one stop device (AE) is provided, which in damping fashion limits a deflection of the vibrating weight (12) along the longitudinal axis (M) of the vibration damper (10).

Abstract: A bellows-type air spring, more particularly a folding-bellows-type air spring having two or more bellows sections designed as folds or toroidal parts, which are separated by rings placed around the air spring bellows, more particularly metal rings, wherein the bellows-type air spring is secured between the sprung and the unsprung mass with the aid of connecting parts, more particularly designed as an air spring cap and an air spring rim or piston, and wherein the bellows project outward in the manner of a balloon between the connecting parts, or the folds or toroidal parts of the bellows project outward in the manner of a balloon between or adjacent to the rings.

Abstract: The invention relates to a shock absorber with a housing, and an inner pipe arranged in the housing, a piston rod, a piston, and which piston divides the interior of the inner pipe into a lower chamber and an upper chamber, a first valve arrangement which is arranged on the piston, a second valve arrangement which is arranged at the upper end of the inner pipe, and a third valve arrangement which is arranged at the lower end of the inner pipe. The shock absorber is distinguished by the fact that at least one proportional flow-control valve is arranged between a first connecting element of the lower chamber of the inner pipe and a second connection element at the upper chamber of the inner pipe.

Abstract: An air spring includes a cover, a base element and a flexible bellows clamped in a pressure-tight fashion between the cover and base element. A level-measuring device, integrated at least partially into the bellows, detects the height of the air spring.

Abstract: The present disclosure relates to a shock absorber having a pressure tube forming a pressure chamber. A piston rod is disposed within the pressure chamber. A reserve tube defines a reserve chamber adjacent the pressure tube. A rod guide assembly is concentrically disposed about the piston rod and the pressure chamber and houses a plurality of digital valves. Each one of the digital valves includes a component which is moveable between an open state and a closed state, and thus helps to control a fluid flow between the pressure chamber and the reserve chamber. An electronic control system is disposed on a printed circuit board assembly (PCBA) and controls actuation of the digital valves. At least one additional valve is associated with one of the digital valves for further controlling a flow of fluid between the pressure chamber and the reserve chamber.

Abstract: A shock absorber includes a valve disc defining two chambers, a flow passage formed in the valve disc, the flow passage allowing communication between the two chambers, a window formed in the valve disc, the window being connected to the flow passage, a valve seat formed on the valve disc, the valve seat surrounding the outer periphery of the window; and a plurality of leaf valves formed in the shape of annular plates, the plurality of leaf valves being stacked on the valve disc. The first leaf valve stacked on the valve disc is provided such that an outer peripheral part is seatable on and separable from the valve seat, and includes a rib recessed on a valve disc side and projecting on an opposite valve disc side at a position facing the valve seat.

Abstract: A shock absorber has a housing with a piston rod assembly disposed therein. A first rod guide member is secured within a first portion of the housing so as to be concentrically disposed about at least a portion of the piston rod assembly. A second rod guide member is secured within the housing adjacent the first rod guide member so as to be concentrically disposed about at least another portion of the piston rod assembly. A digital valve assembly is disposed within the second rod guide member and fluidly couples chambers within the shock absorber.

Abstract: The present invention relates to a position sensitive shock absorber having a bypass passage adapted to communicate a working fluid between two positions in a bore, and an adjustable one-way valve arranged to direct working fluid flowing through the bypass passage, the adjustable one-way valve comprising a resiliently flexible shim having a first end fixed relative to a port, the port being in fluid communication with the bypass passage, and a free end extending from the first end and covering the port, and an adjuster having a fulcrum arranged against the shim to form a pivot, whereby when the working fluid exits the port, the free end is urged away from the port and flexes the shim about the pivot, thereby allowing the working fluid to flow through the port, and when the working fluid enters the port, the free end is urged towards the port and covers the port, thereby substantially preventing the working fluid flowing through the port, and at least one of the shim and adjuster are displaceable relative to e

Abstract: A damper system may include an inner damper having a first annular geometry and a textured surface. An outer damper may also have an annular geometry and be disposed about the inner damper. The outer damper may have a textured surface. The textured surfaces of the inner damper and outer damper may define a cavity that is configured to contain a viscous fluid.

Abstract: A torsional vibration damping arrangement has parallel first torque and second torque transmission paths that proceed from an input region, a coupling arrangement that communicates with an output region for superposing the torques conducted via the two paths, and a phase shifter arrangement for generating a phase shift of rotational irregularities conducted via the first torque transmission path relative to rotational irregularities of the second torque transmission path. The planet gear carrier has at least one base element with a first planet gear bearing location and a second planet gear bearing location. The first planet gear bearing location is positioned at the base element on a first pitch circle diameter and the second planet gear bearing location is positioned at the base element on a second pitch circle diameter, and the first pitch circle diameter and the second pitch circle diameter differ from one another.

Abstract: A device that will allow a go kart to smoothly accelerate and decelerate particularly during racing the go cart. This device once assembled will allow the gradual absorption of shock on the drive chain as it rotates around thereby, rotating the axle of the go kart.

Abstract: Rotary dampers and systems for use and installation within a rotary winged aircraft, and related methods, are provided herein. In some aspects, a rotary damper includes a housing having a rotor assembly positioned inside the housing. The rotary damper may further include at least one resilient member disposed adjacent to an outer portion of the housing. The at least one resilient member is externally visible from outside of the rotary damper. In some aspects, the resilient member includes a torsional spring of the rotary damper. In certain aspects, the resilient member is disk shaped and slidable within a portion of the rotary damper. In some aspects, at least one primary liquid orifice is provided in a portion of the at least one rotor member. In some aspects, at least one pressure equalization port is disposed within a portion of the rotor assembly.

Abstract: A portable conveyor belt splicing apparatus is provided that includes an upper press assembly and a lower press assembly which include, respectively, upper and lower platen assemblies. The upper and lower press assemblies may each include a forced air cooling system for rapidly cooling platens of the platen assemblies. The upper and lower press assemblies may include insulating assemblies with resilient members that support the upper and lower press assemblies. The resilient members provide structural support and insulate the platens from the frame which reduces the power required to heat the platens. In one form, the apparatus includes a power supply circuit that can alternate between providing power to upper and lower heaters in response to the apparatus being connected to different types of standard power supplies. Further, the power supply circuit permits the use of a single recipe for a particular belt irrespective of the type of power supply.

Abstract: A chain made up of bush link plates, bushes fitted into bush fitting holes, and rollers fitted rotatably on an outer circumference of each of the bush. In order to make it possible to replace the roller without removing the bush from the bush link plates, in the chain made up of the bush link plates provided with bush fitting holes, the bushes fitted into the bush fitting holes, and the rollers fitted rotatably on the outer circumference of each of the bushes, the roller is formed from split rollers made by splitting the roller into two or more parts.

Abstract: A link unit includes two outer chain plates and an assembling pin. Each of the outer chain plates has a first end section, and a second end section spaced apart from the first end section. The first end section of each of the outer chain plates has a through hole. The second end section of each of the outer chain plates has a connecting hole that has a first hole portion, a second hole portion, and a neck portion located between the first and second hole portions. The assembling pin is inserted removably through the connecting hole of each of the outer chain plates, and is capable of being prevented from moving past the neck portion of each of the outer chain plates so as to be positioned in the second hole portion of each of the outer chain plates.

Abstract: The present invention relates to a chain comprising a plurality of chain links comprising a polymeric fiber and wherein said chain comprises at least one spacer having a thickness ? at the contact location through which loads are directly transmitted between said chain links and a ratio ?/?=f, with ? being the thickness of any of the chain links at the contact location through which loads are directly transmitted between said chain links and f being in a range between 0.10 and 2.50. The invention further relates to the use said chain for storing, securing, lashing and tying down for handling and transporting cargo, in lifting and hoisting, logging, hauling and rigging, propulsion and driving, mooring, cargo-hold of an aircraft or naval ship.

Abstract: The power conducting device includes at least one first and one second line guiding device. The power conducting device has a first guiding channel and a second guiding channel which can be twisted about a common axis. The first line guiding device is arranged in the first guiding channel and the second line guiding device is arranged in the second guiding channel. The line guiding devices in each case have an end member and a connecting member, the end member being connected either to a respective inner ring or outer ring, and the connecting member being connected to the respectively other outer ring or inner ring.

Abstract: The device is a precision motion right angle drive for use with linear and rotary stages which employs a combination of globoid worm and small diameter star gear. Coaxial with the star gear, on the same shaft, is a spur gear which drives the rotary stage gear or a linear rack. The thin star gear achieves meshing accuracy with the globoid worm permitting a large tooth angle for direct preloading without jamming. This gear combination eliminates backlash, allows a low gear ratio for low globoid worm speed, and enables the use of an ordinary spur gear to engage the stage gear without backdrive or backlash. Further, it allows for gear contact area to compensate for the thinness of the star gear. An embodiment including an integrated bearing rotary stage permits flexibility of application and avoidance of need for custom bearing designs by achieving high motion precision at low cost.

Abstract: A parallel eccentric electro-mechanical actuator provides motive power and includes an electric prime mover that drives the reducer's pinion gear. This pinion drives minimum three star gears with stationary shaft bearings. Each shaft contains an eccentric which are completely in parallel with each other. These eccentrics can be thought of as parallel/in-phase driven crankshafts. Each eccentric drives the parallel eccentric (PE) gear through a bearing. The PE gear exhibits a circular motion (without rotation) which in itself is unbalanced. The crankshafts have another eccentric which create an opposite inertia force to balance that of the PE gear. The PE gear contains an external toothed gear on its periphery. It meshes with the internal teeth of the output ring gear. The relative motion between the PE gear and the ring gear is that the PE gear rolls inside the ring gear. This relative motion is called hypo-cycloidal motion.

Abstract: In accordance with an example embodiment, a powershift transmission may include an input shaft, a first counter shaft, a second counter shaft, and an output shaft operably connected to a transmission housing. The powershift transmission may include a plurality of gears and clutches arranged on the shafts resulting in twenty-seven forward modes.

Abstract: A jump shift of an automatic transmission with multiple shift speeds such as, e.g., ten forward speeds involves operation of many engagement elements. The shifting operation for the jump shift is therefore complicated, making it difficult for the automatic transmission to respond quickly. After shifting to the seventh speed as a direct coupling speed is completed by engaging three clutches C1, C3, C4, the remaining other clutch C2 is also engaged at the seventh speed. In the case of a jump shift, e.g., a shift from the seventh speed to the fifth speed, shifting to the fifth speed is completed by disengaging the clutch C1 and performing control to disengage the clutch C3 and to engage a brake B1 with the remaining other clutch C2 kept in the engaged state. This facilitates the shifting operation from the direct coupling speed and allows the automatic transmission to respond quickly.

Abstract: A chain guide includes a curved guide base extending along the direction in which a torque transmitting chain moves. The guide base includes, on its surface opposed to the chain, a rolling guide portion including a plurality of roller element bearings which are rotatable and configured to guide the chain while kept in rolling contact with the chain, and a sliding guide portion in the form of a curved surface. The rolling guide portion reduces a loss in torque transmission, while the sliding guide portion reduces flapping of the chain, thus reducing noise and vibrations of the chain.

Abstract: A tensioner which adjusts the mean tensioner force to keep the chain tension as low as possible without sacrificing chain control, significantly improving drive efficiency as the chain wears and is subject to low dynamic loads.

Abstract: The disclosure provides a vehicle drive system that includes a drive pedestal, a drive motor mounting plate connected to the drive pedestal, an electric drive motor assembly having an output shaft and being connected to the drive motor mounting plate, at least two bearings connected to the drive pedestal, an axle shaft rotatably connected to the at least two bearings, a drive wheel connected to the axle shaft, a chain drive assembly, and a controller that provides control signals to the electric drive motor assembly and is connected to the drive pedestal. The electric drive motor assembly also includes a first gear speed reduction, while the chain drive assembly includes a second gear speed reduction.

Abstract: A rotary transmitting assembly may include a housing having a bearing surface sustaining a bearing; a hollow shaft coupled to the housing, wherein the hollow shaft has an outer circumferential stepped shaft portion and an inner circumferential stepped shaft portion; a rod member coupled to the housing and having a contacting portion and a protruding part, wherein the contacting portion contacts a part of the hollow shaft and the protruding part abuts the inner circumferential stepped shaft portion. The bearing may include a circular inner support part and a circular outer support part supporting the hollow shaft and the rod member, wherein the circular inner support part abuts the outer circumferential stepped shaft portion and the circular outer support part abuts the bearing surface of the housing. A stopper member may be fixed to the rod member, wherein the stopper member abuts the circular inner support part.