Abstract: A coaxial gear mechanism (1) includes a toothing (5) which is oriented axially with respect to an axis of rotation (3) of the coaxial gear mechanism (1), a tooth carrier (7) which in each case has axially oriented guides (9), and tooth pins (11) which each comprise a body (50), which is mounted so as to be axially displaceable in a guide (9) of the tooth carrier (7), and a head region (51), wherein the head region (51) includes at least one tooth (52) for engagement with the toothing (5), and wherein the tooth carrier (7) wherein the tooth carrier has an irregular angular pitch.

Abstract: A dual axis hinge includes: a track seat that extends along a center line, and that has two pairs of inner track grooves and two pairs of outer track grooves; two support mechanisms that are respectively disposed on opposite sides of the center line, that movably engage the inner track grooves and the outer track grooves of the track seat, and that are convertible between a folded state and an unfolded state; and two synchronization mechanisms that are respectively connected to opposite sides of the track seat, and that are configured to move in a synchronous manner such that movements of the support mechanisms relative to the track seat are synchronized.

Abstract: A system (1) for a watch calendar includes: a first wheel (3); a first finger (5b) for driving the first wheel; a tooth (31b) for driving the first wheel, the tooth being movably mounted on the first wheel (3) between a retracted position and a driving position; and a desmodromic system (2, 4) having a cam (2) and a cam follower (4), the desmodromic system being arranged in such a way that at least a first position of the cam defines a first position of the follower permitting the retraction of the tooth, and that at least a second position of the cam defines a second position of the follower preventing the retraction of the tooth.

Abstract: A step motor that rotationally drives a rotating body includes: an output gear having an output shaft that rotates around a rotation center line together with the rotating body, and a final gear extending radially outward from the output shaft; a radial bearing having an inner circumference side that radially supports the output shaft, on one side of the final gear in an axial direction; a reduction gear mechanism having a first reduction gear meshed with the final gear, and a second reduction gear meshed with the first reduction gear on the one side of the final gear in the axial direction; and a protrusion protruding from the radial bearing toward the other side in the axial direction, in a specific area extending from a longitudinal cross section of the output gear including the rotation center line to an opposite side away from the first reduction gear.

Abstract: Provided is a rotational-force transmitting part including: a rotation support member that is supported, with respect to a first member, so as to be rotatable about a predetermined axis by means of a bearing and that is provided with a first fitting surface formed of a cylindrical outer surface or a cylindrical inner surface centered on the axis; a rotational-force transmitting member that transmits a rotational force with respect to a second member and that is provided with a second fitting surface to be fitted onto the first fitting surface; an annular elastic member that is disposed at such a position as to seal a space between the first fitting surface and the second fitting surface; and a fixing member that fixes the rotational-force transmitting member and the rotation support member in a state in which the first fitting surface and the second fitting surface are fitted.

Abstract: A gear box includes a casing, a gear that is accommodated in the casing and transmits the power of a motor, an output gear that is connected to the gear in the casing, and a collar that is externally inserted to the output shaft of the output gear and is rotatable relative to both the output shaft and the casing.

Abstract: A positioning device for mechanically actuating a component may include a housing with first and second housing parts welded to one another via an axial welded connection. The first and second housing parts may have integrally formed first and second bearing points, respectively, of a bearing within the housing. The positioning device may also include a gearing fixed in the housing, the gearing having an output shaft penetrating the second housing part and being drive-connectable with the component outside the housing, and an output wheel non-rotationally fixed on the output shaft and rotatably mounted in the bearing. The positioning device may further include a rotary position detector with a permanent magnet and a Hall sensor, the permanent magnet being arranged on a gear wheel of the output shaft or on the output shaft at an end face of the output shaft, and the Hall sensor being arranged on the first housing part.

Abstract: A gear housing includes a first receptacle, a second receptacle, an elongated receptacle, a connecting portion, and a mounting arm. The first receptacle is configured to house a worm wheel. The second receptacle is configured to house an output gear. The elongated receptacle is configured to house a first portion of a shaft of a drive assembly. The elongated receptacle extends at least partly alongside the first receptacle and the second receptacle. The connecting portion is connectable to another housing that houses a second portion of the shaft of the drive assembly. The mounting arm extends outward from the first receptacle. The mounting arm is disposed between circumferentially adjacent fastening components along a periphery of the first receptacle. The first fastening component is disposed at a juncture between the first receptacle and the second receptacle. The second fastening component overlaps a part of the elongated receptacle.

Abstract: Methods and systems for increasing the efficiency of a remote wrench. The remote wrench can include a flexible plate within the tool housing or as part of the housing that is more flexible than the rigid housing in conventional remote wrenches that has been shown to limit efficiency. Additionally, a fixed support and a base can be provided that are collectively capable of being coupled to the remote wrench, preferably at the flexible plate, to increase efficiency. The remote wrench operation is therefore improved by reducing inefficiencies and providing a maximum torque output.

Abstract: Dual speed gearboxes, transmissions, and apparatuses incorporating the same are provided herein. Example embodiments include a first gear and a second gear that are coupled to an output spindle, a first bracket and a second bracket for moving the gears along the output spindle, an armature shaft with two different sized pinions, and an actuator that moves the brackets to bring the gears into contact with the pinions.

Abstract: A spur gear deceleration mechanism unit (30) of a wrist structure unit is adapted to be driven in a first deceleration ratio structure or a second deceleration ratio structure. The first deceleration ratio structure uses at least a first spur gear (31) fitted onto an output shaft of a wrist inner frame driving motor (21) and a second spur gear (32) rotatably supported by a first auxiliary shaft (41). The second deceleration ratio structure uses at least the first spur gear, a first additional spur gear (51) rotatably supported by an additional auxiliary shaft (50), and a second additional spur gear (52) rotatably supported integrally with the first additional spur gear by the additional auxiliary shaft.

Abstract: There is provided a transmission device comprising a rigid casing configured to be mounted perpendicularly on a pair of parallel rotatable driving and driven shafts. Annular driving and driven gears are provided in the casing. The annular driving gear is adapted for rotating simultaneously with the driving shaft, and is also adapted for forwarding rotational motion of the inner section to a transmission device. The annular driven gear is adapted for engaging and rotating simultaneously with the driving shaft and sliding over the same, and for forwarding to the inner section rotational motion received from the transmission device. The transmission device is rotatively connected to the annular driving and driven gears for transmitting rotational movement of the driving shaft to the driven shaft. There is also provided a portable boring-welding apparatus using this transmission device and a method for rotating a driven shaft using a parallel driving shaft.

Abstract: An adjustment tool is disclosed herein. For example, an adjustment tool is provided comprising an input gear having gear teeth and an output gear having gear teeth, wherein the input gear and the output gear are in meshed engagement, an input shaft centrally coupled to the input gear, wherein the input gear is configured to rotate about the input shaft, and a housing supporting the input shaft for rotation and supporting a fastener, wherein a tooth of the output gear protrudes from the housing.

Abstract: A method of stepping down the speed of a rotary motion from a first speed, supplied to an input shaft, to a second speed delivered by an output shaft, comprises transmitting said rotary motion to said output shaft, via a driven gear of said output shaft, the driven gear being helical and having a first helix angle, from a layshaft arrangement, so as to generate a first axial thrust of the output shaft in a first axial direction; transmitting said rotary motion to said layshaft arrangement, via a drive gear of said input shaft, said drive gear being helical and having a second helix angle that is larger than said first helix angle, from said input shaft, so as to generate a second axial thrust of the input shaft in a second direction, said second direction being substantially opposite to said first direction; and applying said first axial thrust and said second axial thrust to the same location of an axially rigid support structure, such that said first and second axial thrusts counter-act and at least partly

Abstract: The engine comprises a cylinder with a piston arranged therein, said piston being connected to a connecting rod, and a crankshaft. A first elliptical gearwheel is rigidly fixed to the shaft with the possibility of interacting with a second elliptical gearwheel, which is rigidly fixed to an additional shaft. The distance from the pitch points of the wheel with the wheel to the axis of rotation of the wheel in the case of positions of the crankshaft corresponding to the location of the piston in the upper and lower dead points is 1.1-5 times the distance from the pitch points and to the axis of rotation of the wheel. The distance from the pitch points of the wheel with the wheel to the axis of rotation of the wheel in the case of positions of the crankshaft corresponding to the location of the piston in the centre of its excursion is 0.2-0.9 times the distance from the pitch points to the axis of rotation of the second wheel.

Abstract: A driving force transmission mechanism (40) includes: a first support portion (31) for supporting an end portion of a rotation shaft (1aa) of a photosensitive drum (1a) on a second driving force transmission gear (49) side; a second support portion (33) arranged opposite to the photosensitive drum (1a) across the first support portion (31); a shaft (51) provided so as to protrude from the second support portion (33) to the photosensitive drum (1a) side; and a multi-step gear (47) rotatably supported by the shaft (51), the multi-step gear including a driving force input gear portion (47a) and a driving force output gear portion (47b). Between the driving force input gear portion (47a) and the driving force output gear portion (47b), there is formed a peripheral surface portion (47c) rotatably supported by a bearing member (53) provided into a second through-hole (31a) of the first support portion (31).

Abstract: A drive transmission device includes a motor pinion gear provided at an output shaft of the driving motor and a-transmission gear engaging the motor pinion gear. In the drive transmission device, a sliding washer and a compression spring are disposed between the transmission-gear and the motor mounting plate. The sliding washer is pressed against a web of the transmission gear by the compression spring.

Abstract: A drive device for a deployment element of a motor vehicle, in particular for a pivotable hinged window, which can be moved between an open position and a closed position in a motorized manner is provided. A spur gear transmission driven by an electric motor comprises an output gear having a coupling lever for coupling a deployment lever in a rotationally movable manner, a spur gear that meshes with the output gear, and an intermediate gear that is coaxial with the spur gear. The output gear has outer teeth having two teeth sections of different axial tooth width. The deployment lever that is coupled to the coupling lever extends in a plane of symmetry perpendicular to the rotational axes of the spur gear transmission.

Abstract: An elastic couple barring apparatus (i.e., an elastic couple rotor turning gear) is a special tool to drive a rotor by elastic couple for adjusting a shafting center of a vertical hydroelectric generating set and other rotating devices. The elastic couple rotor turning gear is characterized in that an elastic support is mounted on a frame of the driven device, a casing being connected to the elastic support, a casing cover being firmly fixed on the casing, a speed reducer and an electric motor being installed on the cover, an output shaft of the speed reducer extending into the casing under the casing cover, the output shaft having a pinion gear mounted thereon and meshed with a gear body of a bull gear positioned in the casing, the bull gear being connected to a shaft coupling through parallel keys via a key seat or an upright post, and the shaft coupling being fixed on a rotor of the driven device.

Abstract: A drive transmission system includes a shaft member storing grease in a shaft outer circumferential small diameter section. A drive transmission gear is provided including a gear inner circumferential sliding section and a gear inner circumferential large diameter section. A gear moving device is provided to move the drive transmission gear reciprocally along the shaft member in a shaft direction. A restriction device is provided to restrict a movement range of the drive transmission gear along the shaft member in the shaft direction to enable the gear inner circumferential large diameter section to face the shaft outer circumferential small diameter section substantially continuously.

Abstract: A drive device to rotatively drive N number of image carriers. The drive device includes a single drive motor to generate torque to be transmitted to the image carriers, N number of drive gears to transmit the torque to the image carriers, an input gear rotatively driven by the torque and engaging a first drive gear to transmit the torque to the first drive gear, and N?1 number of idler gears provided between each of the drive gears, respectively, to transmit the torque from the drive gears provided on an upstream side to the drive gears provided on a downstream side in a direction of transmission of torque. The torque generated by the drive motor is sequentially transmitted from the first drive gear to the Nth drive gear via the idler gears to rotatively drive the image carriers.

Abstract: The invention provides a drive train for a hedge trimmer, the drive train being arranged, in use, to provide power to a downstream mechanism, the drive train comprising: a motor having an output shaft; a pinion coupled to the output shaft; a reduction gear arranged to be driven by the pinion, the reduction gear contained within a gear housing; a flywheel engageable to the output shaft, wherein the flywheel is arranged within the gear housing.

Abstract: A method of stepping up the speed of a rotary motion from a first speed, supplied to an input shaft (26), to a second speed delivered by an output shaft (28), comprises transmitting said rotary motion from said input shaft (26), via a drive gear (34) of said input shaft (26), the drive gear (34) being helical and having a first helix angle (?in), to a layshaft arrangement, so as to generate a first axial thrust (F1) of the input shaft (26) in a first axial direction; transmitting said rotary motion from said layshaft arrangement, via a driven gear (44) of said output shaft (28), said driven gear (44) being helical and having a second helix angle (?out) that is larger than said first helix angle (?in), to said output shaft (28), so as to generate a second axial thrust (F2) of the output shaft (28) in a second direction, said second direction being substantially opposite to said first direction; and applying said first axial thrust (F1) and said second axial thrust (F2) to the same location of an axially rigid

Abstract: An idler gear assembly for a generator includes a first gear configured for coupling to a second gear. The first gear includes a first shaft aligned along a first shaft axis, the first shaft having a first shoulder with a first axial face and a second shoulder with a second axial face diametrically opposed from the first axial face, diametrically opposed first and second grooves about a circumference of the first shoulder and a first set of teeth circumferentially located about the first shaft axis, the first shaft includes a first axial distance from the first axial face to the second axial face. The second gear includes a second shaft aligned along a second shaft axis, the second shaft having a diametrically opposed first and second tangs, and a second set of teeth circumferentially located about the second shaft axis, the second shaft includes a second axial distance.

Abstract: There is provided a transmission device comprising a rigid casing configured to be mounted perpendicularly on a pair of parallel rotatable driving and driven shafts. Annular driving and driven gears are provided in the casing. The annular driving gear is adapted for rotating simultaneously with the driving shaft, and is also adapted for forwarding rotational motion of the inner section to transmission means. The annular driven gear is adapted for engaging and rotating simultaneously with the driving shaft and sliding over the same, and for forwarding to the inner section rotational motion received from the transmission means. The transmission means is rotatively connected to the annular driving and driven gears for transmitting rotational movement of the driving shaft to the driven shaft. There is also provided a portable boring-welding apparatus using this transmission device and a method for rotating a driven shaft using a parallel driving shaft.

Abstract: Modular pumps comprising universal gearboxes and crank units and associated methods.

Abstract: The invention relates to a regulating device for an actuator arranged in a gas passageway of an internal combustion engine, in particular for a bypass flap arranged in an exhaust turbocharger, having an electrical servomotor, a regulating member coupled to the actuator and a multi-gear transmission arranged between the servomotor and regulating member. According to the invention, to achieve a large transmission ratio range with a small number of transmission gears, two transmission wheels interact in at least one of the transmission gears via an evoloid toothing.

Abstract: Gear wheel for a clock mechanism, including a toothed gear provided with a homogeneous integral peripheral tooth system with at most 16 teeth in a first meshing level; a first meshing sector that is rotationally fixed with the toothed gear and meshes in a second meshing level, wherein the first meshing level is superposed on a first tooth of the toothed gear; a second meshing sector that is rotationally fixed with the toothed gear and meshes in a third meshing level, wherein the second meshing level is superposed on a second tooth of the toothed gear; a third meshing sector that is rotationally fixed with the toothed gear and meshes in a fourth meshing level, wherein the third meshing level is superposed on a third tooth of the toothed gear.

Abstract: An improved and simplified gear box for toys and other small motorized devices is disclosed. The output gear is a composite piece that integrates a drive shaft with the output gear.

Abstract: A power tong unit having a gear train in which one or more of the gears in the gear train have removable and replacement roller tooth elements, in lieu of conventional gear teeth. In one embodiment, the ring gear and pinion gears have roller tooth elements, and idler gears disposed between the ring gear and pinion gears, have a semi-circular tooth root profile to mesh with the roller element gear teeth. The ring gear of the power tong unit may also have a removable section. A means for removing the removable section from the ring gear, and moving it to a position in which a tubular can be inserted into a central opening in the ring gear, may include a hydraulic cylinder, a clamping mechanism, and a cam surface to generate rotation of the removable section once lifted out of engagement with the ring gear.

Abstract: A transmission capable of receiving rotational power from the source on the surface of the earth and transmitting it to a tool down hole, comprising two or more modules, each of which is constructed of gear pairs held in a supporting structure and operatively engaged with an even number of gear pairs to provide the necessary power to the tool which the transmission drives.

Abstract: A vehicle is described having a transmission driven through a propulsion unit such as an engine, and through a CVT. The transmission is comprised of an input shaft and an output shaft which are coaxially disposed. An idler shaft is driven by the input shaft, and the idler shaft drives the output shaft, through selected gear sets, to provide different gear ratios or drive directions. The CVT also has a fan on the driven side which feeds air through the CVT for cooling. The CVT comprises a drive side clutch and a driven side clutch with the output shaft of the extending through the CVT driven clutch.

Abstract: A slip control device including a shaft fixed to a reference surface; a first gear rotatably coupled to the shaft by a predetermined friction force with respect to an external circumferential surface of the shaft, for slipping with respect to the shaft when applied a rotation force greater than the predetermined friction force; a friction unit configured to provide the predetermined friction force between the first gear and the shaft; a rotation gear box for covering at least one surface of the first gear, coupled to a second gear to be rotated around the external circumferential surface of the shaft, and for rotating about the shaft during rotation of the second gear; and a motor disposed in the rotation gear box and providing the second gear with a rotation force to rotate the rotation gear box about the first gear.

Abstract: A final drive for a work machine includes a housing, a pinion gear, a first idler gear, a second idler gear, and a bull gear. The pinion gear is restrained within the housing. The first idler gear and the second idler gears are rotatably connected to the housing and positioned for engagement with the pinion gear. The bull gear is rotatably connected to the housing and positioned for engagement with the first idler gear and the second idler gear. The housing, the pinion gear, the first idler gear, and the second idler gear are configured to permit the pinion gear to float between the first idler gear, and the second idler to provide even sharing of the load from the pinion gear to the first idler gear and the second idler gear.

Abstract: A sun gear member, planetary gear members, a first ring gear member, and a second ring gear member together form a paradox gear mechanism. A clutch mechanism is disposed between an input gear member and the first ring gear member. The clutch mechanism rotates the first ring gear member, when the input gear member rotates. The clutch mechanism disconnects transmission of the power to the input gear member when the first ring gear member rotates. The sun gear member and the first ring gear member are individual input elements. When one of the sun gear member and the first ring gear member exclusively rotates, the second ring gear member rotates in accordance with the rotation. The sun gear transmits power more reliably without increasing manufacturing cost and without thwarting downsizing of the product.

Abstract: A model helicopter includes a drive mechanism comprising a battery powered motor comprising a toothed motor shaft; a main rotor comprising a main shaft aligned with the motor shaft and including a main gear; and a reduction gear assembly comprising a lower section including four first gears arranged around the motor shaft, and four second gears smaller than the first gears, each second gear fixed to top of the first gear; an upper section including four third gears and four fourth gears each being smaller than the third gear and fixed to top of the third gear, the fourth gears being meshed with the main gear; and four shafts each axially passing through the fourth gear, the third gear, the second gear, and the first gear so that a revolution of the motor shaft rotates the main shaft via the first gears, the fourth gears, and the main gear.

Abstract: In a quick removable position sensor installed onto a steering wheel of a motor vehicle, a transmission mechanism is sheathed onto a steering wheel axle, such that the transmission mechanism and the steering wheel axle can perform a turning movement, and an end of an angular sensor is connected to the steering wheel axle, and another end of the angular sensor is connected to the transmission mechanism, for receiving a turning signal generated and outputted by a turning of the transmission mechanism, and a casing is provided for covering the steering wheel axle, the transmission mechanism and the angular sensor, such that the components in the casing can perform the turning movement and receive the turning signal.

Abstract: A gear system is provided. The gear system includes a driven gear, which is rotated by driving force from a driving gear, a base member to support the driven gear, and a bearing structure, including a shaft and a shaft hole to rotatably support the shaft, by which the driven gear is rotatably attached to the base member. One of the shaft and the shaft hole is provided to the driven gear, and the other of the shaft and the shaft hole is provided to the base member. The bearing structure has a lubricant reservoir in a slidable section, in which the shaft and the shaft hole are slidably in contact with each other when the driven gear is rotated by the driving force from the driving gear, the lubricant reservoir containing lubricant to lubricate the slidable section.

Abstract: An adapter (21) for tapping used in a turret punch press, comprises: a ring gear (29) in which a tapping tool (25) is mountable; and a gear holder (31) in which the ring gear is disposed and which is mountable on a turret (9) of the turret pinch press so as to locate the disposed ring gear (29) at a position corresponding to a punch mounting section (33) formed in advance in the turret (9) of the turret punch press.

Abstract: An improved and simplified gear box for toys and other small motorized devices is disclosed. The output gear is a composite piece that integrates a drive shaft with the output gear.

Abstract: Disclosed is an electric parking brake. The electric parking brake includes driving motor generating rotational force, a driving gear formed at a driving shaft of the driving motor, a driven gear directly coupled with the driving gear, and a spindle coupled with the driven gear to linearly move by receiving the rotational force of the driving motor through the driven gear when the driving motor is driven. The structure of the gears transferring the rotational force of the driving motor is simplified as the driving gear and the driven gear, so that the installation space for the gears is reduced, thereby reducing the size of the electric parking brake.

Abstract: A parallel gear unit (20) for a gearbox (30) for a wind turbine includes at least a low speed shaft (21) and a high speed shaft (22), each shaft (21, 22) having a gear (23, 25) with helical teeth, the gears (23, 25) of each shaft (21, 22) being adapted for meshing with each other. The low speed shaft (21) is rotatably supported by roller bearings (24a) and the high speed shaft (22) is rotatably supported by sliding bearings (24b). A gearbox (30) including the parallel gear unit (20) and a wind turbine including such a gearbox (30) are described.

Abstract: The invention relates to a gearbox device, in particular, for a hammer drill or chisel, with a torque transmission mechanism, which has a first torque transmitting region for transmission of a torque to a first component and at least one second torque transmitting region for transmitting a torque to a second component. According to the invention, the first torque transmitting region and the second torque transmitting region at least partly have a corresponding partial contour for transmitting the torques.

Abstract: A gear train comprising a driving gear and at least two driven gears respectively engaged with the driving gear. Multiple teeth of the driving gear can be accommodated between two adjacent teeth of each driven gear, the number of said teeth of the driving gear that can be accommodated between two adjacent teeth of each driven gear is equal to the number of the driven gears. The engagement of the driving gear with each driven gear is in order and in sequence, i.e., the driving gear engages each driven gear alternately. The invention teaches reduction of the number of the teeth of the driving gear.

Abstract: The drive train of a truck is modified by the addition of a single changeable pair of mating gears positioned between the output shaft of the transmission and the intermediate gear train that drives the ring/bull gear fixed to the drive-axle differential for a first set of drive wheels. One gear of this changeable pair is releasably connected to the distal end of the output shaft of the transmission, while the mating gear is releasably connected to the input of the intermediate gear train of the ring/bull gear for single drive-axle trucks or to the housing of a high-bias drive-shaft differential having co-axial output shafts for tandem drive-axle trucks. These changeable gear pairs are preferably maintained in stock in predetermined ratios so that the drive ratio of the truck can be quickly, easily, and inexpensively altered by the selection of an appropriate gear pair to accommodate different expected operating conditions.

Abstract: A partial gear bearing including an upper half, comprising peak partial teeth, and a lower, or bottom, half, comprising valley partial teeth. The upper half also has an integrated roller section between each of the peak partial teeth with a radius equal to the gear pitch radius of the radially outwardly extending peak partial teeth. Conversely, the lower half has an integrated roller section between each of the valley half teeth with a radius also equal to the gear pitch radius of the peak partial teeth. The valley partial teeth extend radially inwardly from its roller section. The peak and valley partial teeth are exactly out of phase with each other, as are the roller sections of the upper and lower halves. Essentially, the end roller bearing of the typical gear bearing has been integrated into the normal gear tooth pattern.

Abstract: In a gearwheel mechanism for driving a secondary unit such as a fuel pump driven via the gear wheel mechanism by a primary unit, a driven gear mounted on the secondary unit is provided with a positioning element including sections covering teeth areas of the driven gear so that those sections cannot be engaged with a driving gear of the primary unit during mounting of the secondary unit, and in a pump having a gear provided with such a positioning element as wells as an internal combustion engine including a pump with a gear provided with a positioning element.

Abstract: The invention relates to a coupling device, particularly for a sensor unit, comprising at least one dog (30), which can be connected to a rotatable shaft, wherein the dog (30) has a dog toothing (24) at the front thereof, said toothing engaging in a rotor toothing (22) of the rotor (28) for transferring a rotating movement to a rotor (28), wherein the rotor toothing (22) and the dog toothing (24) are configured such that a clearance (20) is formed when the rotor toothing (22) and the dog toothing (24) are engaged in each other. The rotor toothing (22) and the dog toothing (24) are not in mechanical contact with each other in said clearance (20).

Abstract: The engagement of gearwheels with curvilinear teeth is intended to create small-sized mechanical gears of rotational motion with big gear ratio in one stage. The smaller gearwheel—pinion (16)—has one tooth, having in its face section the shape of circumference (3), eccentrically shifted with respect to the axis OO1 of the gearwheel (16). The curvilinear helical tooth of the gearwheel (16) (helical eccentric) is generated by sequential shifting of the circumference 3 along the axis OO1 and its continuous turning around the axis. The greater gearwheel (17) has helical teeth, generated by turning of the cycloidal curve (5), the teeth are conjugated with the helical surface of the pinion (16). The engagement has a continuous line of contact along the whole length of the tooth, where in each section a circular pin tooth and a cycloid are engaged, having minimum losses for friction. In order to eliminate axial loads, occurring in engagement of helical teeth, the gearwheels (16) and (17) are made herring-bone.

Abstract: A gear set for a transmission for use in limited space and capable of transmitting relatively large amounts of power with a small diameter of the gear sets, comprising a series of helical gear elements having stub shafts extending laterally from either side thereof, each of the stub shafts having teeth formed at the remote ends thereof and a central axial bore extending through each gear element and a coupler adapted to engage the teeth on adjacent gear elements join gear elements in driving contact. The gear set having a relatively large effective diameter, and a tension rail extending through the axial bore in the gear elements with retainers at either end of the tension rail so as to effectively permit limited axial movement along the tension rail while preventing inadvertent disengagement.