Showing papers on "Pinion published in 1992"

Rack and pinion retaining and release device for removable computer components

Abstract: A device (10) for installing and removing a removable computer component, such as a data storage drive or computer card, into or out of a computer housing. The device features a drive sled (12) to which the data storage drive is mounted. A stationary carrier tray (30) is secured to the computer housing. Interlocking angled tracks (38) on the drive sled and the carrier tray secure the two structures together. To promote easy coupling of the drive's electrical interface connectors, the front end of the drive sled has a floating guide plate (22) with forward-projecting locating pins (26), which pins are used to align the electrical connectors held by the floating guide plate. A rack (32) and pinion mechanism (40) is provided. The rack is disposed on the top of the carrier tray while the pinion is located on the underside of the drive sled. As the drive sled slides onto the carrier tray, the lever-actuated pinion gear engages the rack and consequently displaces the drive sled relative to the stationary carrier tray. A torsion spring (44) may be used to bias the pinion. The carrier tray also features a raised wedge (36) that latches the lever at one extreme position when the drive sled is in its forward-most position to lock the data storage drive inside the computer housing.

Suction device to create a vacuum in containers

Abstract: A suction device suitable to create a vacuum in containers particularly for the preservation of food in a vacuum, consisting of a casing formed by two coupled halves (4, 5) that contain an electric motor (7) that actuates a suction pump formed by a cylinder-piston unit (14, 15), by means of a reducer group formed by a pinion (17) force-fit onto the shaft (16) of the motor (7) and by a crown gear (19) having an eccentric (37) which actuates a connecting rod (23) connected to the piston (15). The device has at one end a holed tip (34) which can be pluged directly in the seating of the valve (3) that is provided on the container, so that it can be used with one hand only.

Minimization of Deviations of Gear Real Tooth Surfaces Determined by Coordinate Measurements

Abstract: The deviations of a gear's real tooth surface from the theoretical surface are determined by coordinate measurements at the grid of the surface. A method was developed to transform the deviations from Cartesian coordinates to those along the normal at the measurement locations. Equations are derived that relate the first order deviations with the adjustment to the manufacturing machine-tool settings. The deviations of the entire surface are minimized. The minimization is achieved by application of the least-square method for an overdetermined system of linear equations. The proposed method is illustrated with a numerical example for hypoid gear and pinion.

Adjustable height work surface wtih rack and pinion arrangements

Abstract: Apparatus providing an adjustable height work surface A work table is cantilevered from posts supported for vertical motion inside columns from a base A drive connected between the work table and the base changes the height of the work table and is located between the columns and posts Each post carries a rack that engages with a pinion supported by a column for rotation about a common axis A rigid shaft interconnects two pinions and prevents relative pinion rotation A stabilizing structure in each column interacts with the post to maintain engagement between the rack and pinion structure and maintains the work table in a horizontal position during adjustment and use

Coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors

Abstract: One embodiment of a coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors includes a single stage transmission, a transmission housing, and a center hub support structure that are structurally and functionally interactive The transmission housing includes upper and lower standpipe housings secured in combination with a middle housing The single stage transmission includes an input pinion gear rotatably mounted in combination with the middle housing, and upper and lower spiral bevel gears rotatably coupled in combination with the input pinion gear to provide counter-rotation thereof The spiral bevel gears include integral rotor shafts, respectively, rotatably mounted in the standpipe housings The hub support structure is configured for securement of the middle housing internally in combination therewith, with respective surfaces thereof in abutting engagement so that dynamic loads of the rotors and thermal loads are directly coupled into the hub support structure via the middle housing while bending moments of the rotors are canceled in the middle housing The hub support structure has radially extending arms for mounting the coaxial transmission/center hub subassembly in fixed coaxial relation to an airframe structure and for coupling the dynamic and thermal loads to the airframe structure External surfaces of the standpipe housings function as sliding surfaces for linear motion of swashplate subassemblies to minimize the separation between the rotors so that the airframe structure has a compact aerodynamic and structural envelope The transmission housing is internally configured to provide a splash lubrication subsystem

Power tool plastic gear train

Abstract: A power tool with a two-part housing has a drive motor with a pinion gear on the motor shaft. A plastic cylindrical ring gear is fixed to the motor in coaxial surrounding relationship with the pinion gear and has attachment lugs which fit between the two parts of the tool housing and are fixedly secured to each. A plastic gear carrier frame is insert molded on a splined end of a metal output shaft and is receivable within the ring gear and has radial slots for respectively receiving pins which respectively rotatably mount three planet gears in meshing engagement with the pinion gear and the ring gear. The carrier frame has a hollow stub shaft portion which receives the pinion gear therethrough, the stub shaft portion having an elastomeric O-ring seated in a circumferential groove therein for press-fitting a ball bearing thereon, the ball bearing being in turn press-fitted in a seat in the ring gear to support the planet gear assembly.

Universal starter motor assembly

Abstract: A universal starter motor assembly, which may be affixed to many different makes and models of internal combustion engines. A starter motor and solenoid assembly of the gear reduction type has a face plate which covers the armature gear, supports the idler gear and the outer bearing of the clutch assembly extends through the face plate. Many different styles of mounting adapters can be easily attached to the face plate and are shaped and configured to permit the starter motor assembly to be affixed to a particular style of internal combustion engine. The pinion gear of the starter motor is removable and replaceable from the exterior of the universal starter motor.

Control apparatus for a rotary body for cooling an engine

Abstract: A speed control system for an engine cooling fan has a planetary gearset, variably establishing a ratio between input and output speeds, and a hydraulic controller for changing the speed ratio according to engine operating conditions. Either one of a sun gear and pinion gear constitutes an input gear connected to an engine output of the engine. The other one of the sun gear and pinion gear is operationally coupled to a hydraulic control and a ring gear constitutes an output gear driving a rotary body. The hydraulic controller applies and varies an operational resistance to the planetary gearset according to engine operating conditions so as to cause it to vary the ratio of input and output speeds.

Increased capacity face gear arrangement for transmitting torque through an angle and to a plurality of power extraction paths

Abstract: A gear arrangement for transmitting torque through an angle and through a plurality of power extraction paths. The arrangement includes a driving shaft, a floating spur gear pinion concentrically mounted on the drive shaft, a pair of concentric and opposed face gears that are in meshing engagement with the pinion, a primary driven shaft mounted to one of the face gears and at least one non-floating spur gear also in meshing engagement with both face gears. The driving shaft is located by a bearing or a flexible coupling at the shaft end remote from the gear box to allow the pinion to float freely. Useful power may be extracted from both face gears and the non-floating spur gear as well as additional spur gears that are placed in meshing engagement with the face gears.

Power-assisted steering gear e.g. for high-speed motor vehicles - uses redundant sensors of steering angle in control of hydraulic proportional valves and provision of reaction torque on steering column

Abstract: The steering actuator is connected to a spindle (4) carrying a first steering angle sensor (6) and a pinion (7) which engages the interior teeth (8) of a hollow gear wheel (10). The same teeth drive another pinion (11) pertaining to a second angle sensor (12) having separate signal lines (26, 27) to an electronic central controller (28). The two sensors guarantee a reliable set-point for the hydraulic positioner (2) of the steerable wheels (3). Reaction torque on the spindle is generated by an electric motor (21) driving a star wheel (23). ADVANTAGE - Fault-tolerant safety is ensured by redundancy of steering angle sensors, and the reaction torque is perceptible by the driver even at higher speeds.

Two-stroke cycle engine having linear gear drive

Abstract: A balanced motor two-stroke cycle engine having a linear drive includes a sealed gearcase secured to a cylinder housing having a plurality of concentric cylinders. The sealed gearcase includes a fixed ring gear, a pinion gear whose diameter is equal to the radius of the ring gear, a hub on which a piston rod is journaled for rotation, and two sets of counterweights. The piston rod moves in a linear fashion as the pinion gear rotates inside the fixed ring gear. The piston rod extends into the innermost cylinder, and a piston secured to the piston rod reciprocates linearly in the innermost cylinder. A chamber between the piston and the gearcase receives a flow of air and the air is transferred to the cylinder beneath the piston through a plurality of ports or apertures for compression. Fuel is injected into the cylinder from a pump chamber by a diaphragm that moves in response to air pressure in the cylinder beneath the piston.

Rack-and-pinion steering apparatus

Abstract: A cushioning material sheet to be interposed between a rack support and a press plug for applying an elastic force provided by a spring is formed such that at least its one end face is tapered. Slide-contact surfaces of the rack support and the press plug to be brought into contact with the two end faces of the cushioning material sheet are so formed as to move the cushioning material sheet in a direction perpendicular to a rack support direction, along which the thickness of the cushioning material sheet is decreased. A biasing member is provided to bias the cushioning material sheet in this direction of movement, thereby obtaining a proper meshed condition between a pinion and a rack.

Steering gear for motor vehicles

Abstract: A motor vehicle rack and pinion steering gear having torsional damping by friction between an annular plastic damper ring on a housing of the steering gear and a journal surface on a pinion shaft of the steering gear. The damper ring has an outer wall press fitted in a pinion shaft bore of the housing to nonrotatably mount the ring on the housing and a plurality of flexible inner fingers resiliently bearing against the journal surface. An annular metal spring is disposed on the damper ring and includes a plurality of integral legs bearing against the flexible inner fingers of the damper ring to press the fingers against the journal surface.

Offset face gear transmission

Abstract: A gear arrangement for an offset transmission includes two concentric, counter-rotating face gears in meshing engagement with an engine output shaft, the face gears being connected to respective concentric, vertical counter rotating face gear shafts of unequal length, each shaft ending in a helical spur gear that is in meshing engagement with an output helical face gear. The helical output face gear is connected to the output shaft, thereby completing the offset transmission. The face gear shafts can be coupled together by means of thrust bearings that couple the axial thrusts of one shaft to the other in an opposite direction. The shafts can also be coupled via a preload spring that ensures the torque split between the pinion gears is statically determinant. The gear arrangement can be applied to twin engine designs, with a spur gear train coupling the two engines together via an interconnect shaft.

Continuous rotary labeling apparatus and method

Abstract: A rotary decorating machine for bottles having an alignment structure formed adjacent their bottom periphery, wherein the machine has at least one decorating station. A rotating table is provided with a plurality of independently rotatable bottle receiving cups spaced from one another adjacent the outer periphery of the table. The rotating table is driven by a first motor, and the bottle receiving cups are independently rotatable by pinion gears attached thereto for enabling planetary rotation of the bottles relative to the rotating table. A lower gear is provided with a second drive motor for rotation independent of the rotating table, and the pinion gears attached to individual bottle receiving cups are intermeshed with that gear. Rotation of the lower gear independently effects the rotation speed and direction of the bottle receiving cups independent of the planetary rotation resulting from movement of the rotating table. A control device is further provided for implementing instructions to the second drive motor to effectively control the rotation of the bottle receiving cup relative to the rotation of the rotating table during labeling operations.

Internally meshing planetary gear structure

Abstract: An internally meshing planetary gear structure is the type having a first and second supporting blocks (104, 105). The supporting blocks (104, 105) are rigidly connected to each other by carrier pins (150) passing through inserting-fit holes (128a, 128b) formed on externally toothed gears (118a, 118b). Also, the end surfaces of the carrier pins (150) are exposed on a counter-member mounting surface (104a) of the first supporting block positioned on the counter-member side, and thus screw holes (156) for screwing counter-member fixing bolts (155) are formed on the end surfaces. With this arrangement, it is possible to enlarge the actual usable area of a counter-member mounting surface of the first supporting block and hence to increase the number of counter-member fixing bolts.

Operating mechanism for espagnolettes and other similar fasteners

Abstract: An operating mechanism for a door or window fastener of the espagnolette type in which two slidably mounted locking bars are driven by the operating mechanism simultaneously in opposite directions to fasten or unfasten the door or window comprises a master pinion (21) which is mounted so that it can be driven by the spindle of an operating handle so as to turn with the handle, a first linearly reciprocable member (10) having a primary rack (14) and an auxiliary rack (15), the primary rack (14) being drivingly engaged by the master pinion (21) and the auxiliary rack (15) drivingly engaging a rotatably mounted slave pinion (22), and a second linearly reciprocable member (11) having a rack (20) corresponding to the auxiliary rack (15) of the first member (10) and drivingly engaged by the slave pinion (22) so that movement of the first member (10) in one direction in response to rotation of the master pinion (21) causes a corresponding movement of the second member (1) in the opposite direction.

Chair height adjustment mechanism

Abstract: An adjustment mechanism for adjusting the height of a chair seat, table top or other item includes telescoping outer, intermediate and inner tubes. The outer tube is attached to a base. The inner tube is attached to a chair seat or other load. A drive extends the telescoping tubes to adjust the height of the load. In one form, the drive includes a flexible, substantially nonelastic tape having an end fixed to the inner tube and an end fixed to the outer tube. The tape engages or rides over a sheave supported on the intermediate tube. In another form, the drive includes a pair of racks and a pinion. A piston cylinder actuator is disposed within the inner tube. The actuator includes an extensible rod which causes relative movement between the inner and intermediate tubes and extension of the intermediate tube relative to the base through the drive tape or rack and pinion.

Multiple planetary gear system for multi-speed automatic transmission

Abstract: An improved planetary gear type transmission mechanism is provided which is capable of realizing a plurality of desired speed ratios in a wide range, for example in an automatic transmission, and which maintains gear ratios of all of a plurality of planetary gear sets in an available range. The transmission mechanism includes a double pinion type planetary gear set.

Lubrication of power drive comprising large diameter gear

Abstract: A lubricator for large diameter open gearing utilizes a header having a series of orifices which direct streams of oil onto a deflector plate which produces a spray directed at the teeth of a drive pinion in close proximity to the point of first engagement on the approach side of the pitch point. Air turbulence generated by movement of the gear teeth is prevented from affecting the spray pattern by utilizing a collector for excess lubricant as a baffle and by utilizing the deflector plate to block the movement of air. Uniformity of spray pattern from the orifices is enhanced by providing a pressure relief valve remote from the feed points of the header.

Pto unit for a transmission or the like including a lubrication system operable only when the pto is in operation

Abstract: A PTO unit for a transmission or the like includes a housing having an interior chamber. A PTO drive shaft, mounted in the housing, includes a first drive connection for connection to an auxiliary device to provide power thereto. The PTO drive shaft includes a second drive connection. A lubricating pump is connected to the second drive connection of the drive shaft to be in driving engagement therewith. A laterally shiftable gear is mounted on the drive shaft between the first and second drive connections. A gear shift mechanism is provided for laterally shifting the shiftable gear between the first and second positions. An idler shaft, spaced from and parallel to the drive shaft, is mounted in the housing, and a cluster gear is provided for rotation on the idler shaft. The cluster gear includes a transmission driven gear and a pinion. The pinion engages the laterally shiftable gear in the first position thereof for driving the PTO shaft, and is disengaged therefrom when the laterally shiftable gear is in the second position. The idler shaft includes a hose for receiving a lubricant from the pump and injecting it into the housing to maintain the PTO unit lubricated only when the pinion is engaged with the laterally shiftable gear.

Effect of Lubricant Jet Location on Spiral Bevel Gear Operating Temperatures

Abstract: An experimental study was conducted to determine the effect of lubricant jet location on spiral bevel gear bulk temperatures. Transient surface temperatures were also measured. Tests were conducted on aircraft quality spiral bevel gears in a closed loop test facility. Thermocoupled pinions and an infrared microscope were used to collect the pertinent data. A single fan jet lubricated the test gears. Lubricant flow rate (lubricant jet pressure) and applied torque were also varied. The results showed that jet placement had a significant effect on the gear bulk temperatures.

Non-circular front chain wheel for crank gear.

Abstract: The non-circular front chain wheel for crank gear is comprised of a crank gear wheel (1) allowing to increase progressively the cycling torque from the dead point up to the point where the extension of the leg allows to create the maximum effort, due to a progressive variation of the primitive radius of the toothing between these two points, followed by a rapid decrease to the next dead point. The principle is that the force to be provided is proportional to the muscular force that the user may provide. It essentially concerns the cycle industry but may also find applications in other fields, for example physical exercisers for body-building or reeducation, and in general all apparatuses utilizing the cycling motion and a chain or belt transmission system between the front wheel or wheels of the crank gear and one or a plurality of pinions actuating the device to be driven.

Gear-type machine with flattened cycloidal tooth shapes

Abstract: In a gear-type machine, in particular in a ring gear pump with internally toothed ring gear meshing with a pinion having only one tooth less, for reducing the noise the pinion teeth are only half as wide as the internally toothed ring gear teeth and the cycloids are flattened in order to ensure adequate free passage of the teeth heads opposite the point of deepest teeth engagement in spite of minimum clearance.

Manually operated rotary toothbrush

Abstract: Improvements to a manually operated, rotary bristle toothbrush. A thumb actuated mechanism is slidably and longitudinally mounted in an essentially hollow, elongate handle and a part of the mechanism, a rack, is caused to engage at least one compound pinion/spur gear in order to convert longitudinally reciprocative motion to rotary motion that is shunted toward the head of the toothbrush. The head contains therein one or more rotary bristles that project orthogonally from the head of the toothbrush and off the major longitudinal axis of the device. Rotary motion is conducted by a drive shaft into the head of the brush and transferred via a crown gear to bases of the brush(es) by interface between the crown gear of the drive shaft and at least one brush base comprising a capstan device adapted for rotation.

Method for tightening a fastener

Abstract: An improved and novel method for controlling the speed of a mechanical apparatus in relation to a reference parameter. The reference parameter can be torque, displacement or similarly measurable parameters. A preferred implementation of the improved and novel method is used for tightening fasteners which utilizes feedback torque to control the speed and sequence of a fastening tool. This feedback torque is constantly monitored to allow continuous adjustment of the speed of the fastening tool and thereby control the torque applied to the fastener. The method is implemented on a fastening tool used to tighten a retainer nut on a pinion gear shaft supported by bearings in a differential housing. The speed of a fastening tool is continuously monitored and changed in response to a rotational torque measurement taken from the pinion gear shaft and bearing assembly. As the rotational torque value of the pinion gear shaft and bearing assembly approaches a final preselected value the speed of the fastening tool is slowed to ensure the retainer nut is not over tightened.

Automatic dental flossing device

Abstract: A power-driven fully automatic dental flossing device has an elongate housing configuration with an extending thin housing arm forked at the front end, and an enlarged housing handle for containing a pair of reels (11, 17) with dental floss (10) on them, a dividing gear system, dental floss operating and winding switches (7), and a powered motor (40) with batteries and/or a transformer. The dental floss (10) across two tines of the forked arm is wound on the two reels, one of which supplies fresh dental floss, the other stores the floss as it is no longer usable. The dental floss (10) can be automatically reciprocated between the tines and teeth by pulling an operating switch (7) backward with a single user's finger, and also can be manipulated manually whenever it is necessary by pushing the same operating switch forward. On the other hand, the dental floss can be continuously and automatically wound backward or forward with one button touch (5) to provide a fresh section of floss, or rewinding it back at any time, even when the dental floss is still between teeth. The pair of reels (11, 17) winding the dental floss are driven by the dividing gear system which comprises two pinions (27, 28) installed on two reel shafts (25, 26), separately, and a main dividing gear (23) with only partial circle gear teeth (as an exemplary arrangement shown in the attached drawing, 180° circumference of the main gear has gear teeth). When rotating a full cycle, the main gear has to drive each one of pinions a half of said cycle, respectively, therefore both reels, rotating together with the two pinions, will in turn be a primary driving reel to wind the dental floss onto itself and a following reel to release the dental floss off itself, so that the dental floss can automatically complete reciprocating motion to achieve the object of cleaning teeth. The main gear (23) can also be slid by a yoke of the winding switch (5) to an upper or lower position where only one pinion could be driven by the main gear, therefore the dental floss (10) will be continuously wound only in one direction at a time, and the above-mentioned function of providing or rewinding dental floss can be automatically accomplished.

Electric automobile reduction gear

Abstract: PURPOSE: To provide a single-shaft type electric automobile reduction gear whose axial direction size can be shortened. CONSTITUTION: Since the pinion gear shaft 48 of a planetary gear type differential gear 18 is directly supported by the outer race 50L of a left side first uniform speed joint, a conventional carrier for supporting the pinion gear shaft 48 is no more necessary, thereby, the outer race 50L serves also as the carrier for supporting the pinion gear shaft 48. Accordingly, in the conventional automatic automobile reduction gear, the spline fitting between a boss on the carrier and a connecting shaft of the uniform speed joint is not needed, so that the axial direction size WL can be shortened to an extent where the carrier and the connecting shaft have occupied conventionally, and the loading capacity of vehicles can be improved. COPYRIGHT: (C)1993,JPO&Japio

Pinion fixture for planetary gear - consists of stub shaft with milled axial part, with annular groove leading to free stub shaft part

Abstract: The pinion fixture for planetary gears esp. consists of the pinion (1) possessing a stub shaft (2) fixed to it, with a milled axial part (3) directly next to the pinion (1). The milled part (3) leads via an annular groove (4) into the free sub shaft part (5) which is pressed into a hole in a gear section to be connected to the pinion (1). The teeth of the milled part (3), at least in their radial outer part, fit into the gear part. The entire length of the stub shaft is pressed into a seating on the gear part being joined. USE/ADVANTAGE - The pinion fixture requires a min. axial and radial space to contain it and does not move or turn.

Planetary gear transmission

Abstract: A two-stage planetary gear transmission having a first-stage planetary gear transmission and a second-stage planetary gear transmission is disclosed, wherein the carrier of the second-stage planetary gear transmission comprises first and second carrier parts integrally connected with each other. A hollow pinion shaft formed thereon with the sun gear of the second stage is rotationally supported on the first carrier part via a deep-channel ball bearing in a cantilevered condition. A carrier of the first stage for supporting planetary gears of the first stage is integrally formed on the end of the hollow pinion shaft of the second stage. A lubricant layer of about 15 μm to about 20 μm in width is formed between an inner race member of a planetary bearing and a planetary shaft for each of the planetary gears of the second stage. In addition, the gear ratio u1 of the first-stage planetary gear transmission is larger than the gear ratio u2 of the second-stage planetary gear transmission, and which is equal to or larger than about 5. According to the present invention, misalignment or improper meshing of the gears of the first stage can be adjusted by movement of the cantilevered pinion shaft of the second stage. Improper meshing of the planetary gears of the second stage can be adjusted by the lubricant layer. In addition, the noise from the planetary gear transmission can be reduced by setting the the gear ratios of the first and second stage as mentioned above.