1000 results about "Worm drive" patented technology

An apparatus and method for joining members together using a self-drilling screw apparatus or stapling apparatus are disclosed. The screw apparatus includes a worm drive screw, a spur gear and superior and inferior screws which turn simultaneously in a bi-directional manner. A rotating mechanism drives the first and second screw members in opposite directions and causes the screw members to embed themselves in the members to be joined. The screw apparatus can be used to join members such as bones, portions of the spinal column, vertebral bodies, wood, building materials, metals, masonry, or plastics. A device employing two screws (two-in-one) can be combined with a capping horizontal mini-plate. A device employing three screws can be combined in enclosures (three-in-one). The stapling apparatus includes grip handles, transmission linkages, a drive rod a fulcrum and a cylinder. The staple has superior and inferior segments with serrated interfaces, a teethed unidirectional locking mechanism and four facet piercing elements. The staples can be also be used to join members such as bones, portions of the spinal column, or vertebral bodies.

An infinitely variable speed ratio planetary ball transmission comprising planetary members in rolling contact with moveable inner and outer races and a constant speed accessory drive system utilizing the transmission. The transmission is infinitely variable between ratios of approximately 0.3 and 1.0. A transmission input shaft is connected to a prime mover such as a vehicle engine crankshaft by a drive belt. The transmission comprises at least one output shaft that is coaxial with the input shaft. An output pulley is attached to the output shaft. A belt is engaged between the output pulley and various engine accessories. A second end of the transmission output shaft may be directly coupled to an engine accessory mounted on the transmission. An included control system senses a crankshaft speed. A processor analyses the crankshaft speed and accordingly adjusts the transmission ratio using a stepper motor connected to a worm drive to maintain a constant output speed regardless of crankshaft speed.

An articulating platform (20) that is used to vary the longitudinal and lateral angular displacement of an exercise bicycle (22) mounted thereon. The platform includes a bicycle mounting base (24) configured to accept the footprint of a conventionally dimensioned exercise bicycle. The base (24) pivots in both a longitudinal axis and a lateral axis, thereby simulating uphill and downhill bicycle riding and turning when leaning sideways in a turning direction. The base (24) is preferably articulated by a D.C. motor drive system or optionally by a gear motor, pneumatic, hydraulic and worm drive systems each having controls for initiating directional articulation. A platform enclosure (40) supports the base and the drive system to provide a safety barrier for protecting moving components of the platform.

The invention discloses a rotary disc type cargo classifying device which comprises a code scanning device. The code scanning device is fixedly installed on the top of an initial conveying mechanism. The initial conveying device is connected with a sorting mechanism through a transition plate. The sorting mechanism comprises a front support. The top of the front support is provided with a rotary disc drive motor. The rotary disc drive motor is engaged with a second gear through worm and gear transmission. The second gear and a first gear are fixedly installed on the same main shaft. The first gear is engaged with a third gear at the bottom of a rotary disc to drive the rotary disc to rotate. A rear support is arranged at the bottom of the rotary disc. Multiple sliding groove devices are arranged at the positions, along the periphery of the rotary disc, of the top of the rear support. A rotating push rod mechanism is installed at the center of the rotary disc. The rotary disc type cargo classifying device is simple in structure and obvious in effect, compared with a traditional classifying mechanism, the space occupied by a cargo classifying mechanism is greatly saved, space is saved, and accurate classification of cargoes are achieved.

Methods and apparatus are provided for locking and releasing ends of a support strut coupled between a mounting platform and a load. In a preferred embodiment, the strut comprises a damping section coupled between the ends and having a gap therein when the strut is unlocked, a locking section coupled between the ends for closing the gap by applying stress to a portion of the damper section through a force transmitting member, and a releasing section coupled in parallel with part of the force transmitting member, the releasing section including a Shape Memory Alloy (SMA) and heater therefore. Heating the SMA relieves the stress and opens the gap. Release from the locked condition occurs gradually and without fracture or sudden shock and the heater can be actuated remotely. In a preferred embodiment, a worm drive turnbuckle arrangement is used to apply force to lock the strut.

The invention relates to a worm-driven double-valve hydraulic oscillator, belonging to the technical field of petroleum, natural gas extraction and drilling tools. The oscillator is composed of a vibration short-circuit assembly and a power short-circuit assembly; the vibration short-circuit assembly and the power short-circuit assembly are connected mutually through a screw thread; the power short-circuit assembly is composed of a compression sleeve, a worm shaft, a main engine shell, a lower joint, a shunting ring and a shunting sleeve; the compression sleeve is arranged at the upper end of the main engine shell through a screw thread; the lower joint is arranged at the lower end of the main engine shell through a screw thread; the worm shaft is arranged in the main engine shell; an end cover is arranged at the end head of the upper end of the worm shaft through a screw thread; an upper alignment bearing and a lower alignment bearing are arranged at the circumference of the worm shaft which is below the end cover; the shunting ring is arranged at the circumference of the worm shaft which is below the lower alignment bearing through the shunting sleeve. According to the worm-driven double-valve hydraulic oscillator, the drilling efficiency is improved, in comparison with the traditional technology, the energy consumption is reduced, and the service life is prolonged, and the worm-driven double-valve hydraulic oscillator is particularly suitable for construction need of petroleum, natural gas extraction and drilling.

A collapsible traffic barrier system is disclosed which includes a steel vault having a top, a bottom, two ends, an approach side and a shoulder side. The top may be treated with anti-skid material. A rod is rotatably mounted to support members inside the vault, wherein the rod extends across the vault from end to end. A plurality of bollards are coupled to the rod substantially near the first end thereof, whereby rotation of the rod rotates the bollards so as to extend the second ends of the bollards above the vault in a vertical direction, or raised position. An actuator having a first end anchored within the vault and a second end is coupled to the rod by means of an arm. The actuator is a worm-drive mechanism disposed for rotating the rod. A stop is anchored to the bottom of the vault for engaging the first ends of the bollards when the bollards are in the raised position.

The invention discloses a backlash-free double rollers enveloping worm gear, a worm wheel of the transmission mechanism comprises two half worm wheels, the rollers are uniformly distributed in circumferential direction of each half worm wheel, the rollers rotate on the rotation axes; the two rows of rollers are arranged alternatively, wherein, one row of the rollers are engaged with left flank of the worm, the other row of rollers contact the right flank of the worm; the left and right flanks of the worm are respectively enveloped by rollers which are arranged at appropriate positions on the top and bottom of the main plane; through the adjustment of the mounting positions of the two half worm wheels, the rollers can always be in contact with the flank of the worm ,so as to achieve no backlash transmission. The transmission mechanism eliminates the return error of the transmission, makes the transmission smooth and improves the accuracy of transmission. The invention has the advantages of simple structure, easy manufacture, low cost and good economy, is a novel worm transmission device combining precision transmission and power transmission, is capable of being used for precision indexing, precision transmission and precision power transmission.

A compact, low profile omnidirectional drive and steering unit that, in one embodiment, utilizes a single, centrally located wheel, mounted on a drive shaft, upon which is also mounted a tapered pinion gear. The pinion gear on the drive shaft meshes with a ring shaped beveled worm gear contained within the outer housing of the gear unit that surrounds the centrally located wheel. At one side of the outer housing is a worm drive that meshes with the ring shaped and beveled worm gear. Rotation of the worm drive causes rotation of the ring shaped worm gear, which causes the drive shaft mounted pinion gear to turn, which turns the drive wheel to provide driving power for whatever vehicle or system of which the unit is a part. A steering and timing gear is mounted on the lower surface of the unit to provide steering capability.

An overhead storage device includes a storage container that is pivotably or rotatably mounted to an overhead surface, such as a ceiling or a plurality of rafters. The storage container is generally moved by a motorized actuator assembly. The motorized actuator assembly includes a worm drive and follower nut arrangement. The storage container is supported by a frame assembly and is secured to the frame assembly generally at an end of the storage container. The frame assembly also includes a plurality of arms that secure the storage container to the frame assembly. The overhead storage device is sized to allow a motor vehicle to fit below a raised storage container in an average height garage. The storage container is assembled from two generally identical halves that are nestable for shipping and storage.

A width-adjustable carrier frame for receiving and supporting a grilling rack, a tray, a dish, a cooking or baking sheet, or the like of an oven. The carrier frame consist of at least two cross members with tube-type front-side end areas and two approximately U-shaped carrying bows. At least one carrying bow is continuously adjustable relative to the cross member by a worm drive.

An electromechanical connector for use between a power source such as a battery and a device requiring the power such as an automotive electrical system. In some embodiments, the connector includes a radius electrical contact constituting a primary electrical current path, and a band clamp with a slotted band constituting a secondary current path, and a worm drive adjustment assembly for symmetrically tighten the connector to the battery post. A kit is described having an electrical-contact conductor with a concave surface conforming to a battery post, and a band clamp to symmetrically compress the conductor against the post. Some embodiments provide a conductor that conforms to an outer portion of the post, and includes a band clamp mechanism with a band fixed at a non-moving end to the conductor, and at an opposite slotted end interfacing to a worm screw held against the conductor.

A torque transfer mechanism for controlling the magnitude of a clutch engagement force exerted on a clutch pack that is operably disposed between a first rotary member and a second rotary member includes an actuator having an inner sleeve, an outer sleeve, and a plurality of balls. The inner sleeve is supported for rotation relative to the first rotary member and each of the inner and outer sleeves includes a spiral groove aligned with the other. The balls are positioned within the spiral grooves between the inner and outer sleeves. An electric motor selectively rotates one of the inner and outer sleeves so as to induce axial movement of the other of the inner and outer sleeves to engage the clutch.

The invention relates to a modeling method of a plane secondary envelope torus worm-drive worm gear hob tooth profile. The method comprises the following steps: 1) giving initial design parameters; 2) calculating sum which corresponds to an initiating terminal; 3) obtaining point coordinates on an A tooth face; 4) judging whether the point coordinates are located in the working range of a hob or not, if yes, turning to the step 5, and if not, turning to the step 8; 5) obtaining the point coordinates on the A tooth face; 6) obtaining a coordinate of a middle point; 7) modifying a value, turning to the step 3, and obtaining intersecting lines of a series of intersecting planes and a tooth face of a worm gear hob basic worm; 8) modifying a tail end, and obtaining coordinates of points under the tail end and a middle point; 9) obtaining coordinates of points on a B tooth face and a middle point, wherein the B tooth face is the same with the A tooth face in the tail end; 10) obtaining point coordinates on a tooth root circular arc face; 11) obtaining point coordinates on a main cutting edge; 12) building an axial tooth profile model of a worm gear hob; and 13) building a curved face model of the worm gear hob basic worm. The method is free of building of a solid model, easy to achieve, low in modeling cost, and high in modeling precision.

The invention relates to a six-degree-of-freedom position posture full-decoupling adjustable clamp. The dynamic platform posture is compensated through the increment of the posture change range of a workpiece and a workpiece clamp, so that the problem of low implementation ability of the dynamic platform posture of a parallel machine tool is solved. The six-degree-of-freedom position posture full-decoupling adjustable clamp comprises an x-axis shifting and rotating assembly, a y-axis shifting and rotating assembly and a z-axis shifting and rotating assembly. A screw drive mode and a concave-convex dovetail structure form a shifting motion; a worm drive mode and a shaft hole clearance fit structure form a rotating motion; and the six-degree-of-freedom position posture full-decoupling adjustable clamp can be shifted and rotated along the x axis, the y axis and the z axis and around the x axis, the y axis and the z axis through structure innovation and matched mounting of shifting and rotating members for shifting a guide direction to be parallel to and vertical to a rotating shaft. The six-degree-of-freedom position posture full-decoupling adjustable clamp is reasonable and compact in space layout, accurate in positioning and firm in clamping, and the backstroke self-locking property is achieved in driving; and the six-degree-of-freedom position posture full-decoupling adjustable clamp can be manually adjusted and can be also accurately adjusted by software programming and driving a driving part of the clamp by a servo motor.

A steering lock for locking the steering spindle of a motor vehicle steering system including a blocking element that pivots along a longitudinal axis from a locking to an unlocking position using an electromechanical drive and is maintained in the unlocking position by a spring-loaded lever. In order to enable the lever to maintain the blocking element in the unlocking position when a worm drive generates the displacement of the blocking element, a worm gear representing a first control contour is used. A first cam for pivoting the blocking element to the unlocking position and a second cam for actuating the lever are mounted on the worm gear. Prior to the pivoting of the blocking element from the unlocking to the locking position, the lever is pivoted from a rest into a release position and, only afterwards, the worm gear enables the blocking element to pivot to the locking position.

A curtain blind take-up drive mechanism with non-slip effect having a freehand turn operation. The non-slip effect is configured to prevent slats of the blind from slipping down, and further includes coupling a power end of a drive shaft to a reel. The drive shaft connects to a worm gear via a transmission amplifier. The worm gear is actuated through reciprocally engaging with a worm driven via a flexible shaft coupling and through operation of a slat tilt rod. Reciprocal teeth meshing and teeth surface pressure between the worm gear and the worm achieves a high slip-rate, and thereby inhibits reverse transmission, thus accomplishing a reverse direction stoppage effect, and further producing a large frictional force and forming a surface-pressure slip effect thereof. The transmission amplifier allows the drive shaft to achieve a high rotational speed, thereby facilitating freehand operation for taking-up and letting-down of the slats.

The invention relates to a solar tracking and driving control system comprising a receiver, a protection plate, at least three thermocouple temperature sensors, a central control unit, an elevating-angle angular sensor, an azimuth-angle angular sensor, an azimuth-angle driving mechanism, an elevating-angle driving mechanism, a GPS (Global Positioning System) module, a power supply, an azimuth-angle worm and gear transmission mechanism and an elevating-angle worm and gear transmission mechanism. The azimuth-angle driving mechanism drives the azimuth-angle worm and gear transmission mechanism, the elevating-angle driving mechanism drives the elevating-angle worm and gear transmission mechanism; the azimuth-angle driving mechanism is provided with at least two first motors; the azimuth-angle driving mechanism is provided with at least two second motors; the thermocouple temperature sensors are distributed on the protection plate, circularly distributed in at least one circle centering about a receiving hole of the receiver, and each circle is provided with at least three thermocouple temperature sensors. The invention has the advantages of high tracing reaction speed, high tracking accuracy, low cost, stable driving part operation, strong anti-impact capability, great transmission torque and long service life.

The present invention is directed to an elevating mechanism, in particular to an elevating mechanism for routers, is configured for easy micro adjustment and coarse or macro adjustment. In an embodiment, a power tool includes a base configured to adjustably receive a motor housing for operating a working tool. A worm drive is pivotally coupled, in an eccentric configuration, to an eccentric lever. The eccentric lever is adjustably coupled to at least one of the housing or the base such that the eccentric lever is operable to cause the worm drive to be positioned into an engaged position with a rack assembly and a released position wherein the worm drive is remote from the rack assembly. The elevating mechanism is operable to permit rotational micro adjustment and macro manual adjustment wherein the worm drive is remote from the rack assembly for permitting coarse adjustment of the motor housing with respect to the base.

The invention provides an on-chip antenna test device. An adjusting mechanism is arranged on a probe bench pedestal and is formed by X, Y, and Z mobile platforms. Antennas on an antenna chip-bearing bench are precisely positioned via a CCD telescope and the adjusting mechanism. A probe support performs feeding for the on-chip antennas. Via the rotation of a low-position axis and a polarization axis, matching for polarization of a receiving antenna and an emission antenna is performed. If the polarization of the receiving and emission antennas is matched, full-directional data acquisition in 0-360 DEG is performed via a rotation shaft. In the low-direction axis, a direct-current servo motor drives a synchronous tooth belt wheel which drives a turbine worm. The turbine worm drives a straight gear which drives a sliding guide rail. According to the invention, a feeding problem of the antennas is solved; the test device is provided with front and back testing ability of the antenna; effects of interference on antennas of a traditional bench body are reduced; and testing functions of holographic stereoscopic directional diagram of a to-be-tested antenna is achieved.

The invention relates to a feeding method with the bar tube set on the asymmetrical radial impact forging precision feeding device which mainly comprises the micro tuning turbine, micro tuning base, micro tuning lever, hammer feeding cylinder, micro tuning worm, micro tuning base shaft sleeve, hammer pole, feeding cam, main shaft, hammer, with the micro tuning worm driven by the exchange servo generator, controlling the rotation angle of the micro tuning turbine, hammer lever being able to slide inside the main shaft slide slot, working curvature of the hammer lever matching with the feeding cam, pushing the radial down of the hammer lever, with one hammer pushed down one time, 4 hammers in even distribution, 7 cams forming into roller structure. When the main shaft drive hammer lever working in circumference movement, it drives the cam loading, using the bar fatigue broken principle, fostering the fissure expanding along the radial circumference, to finish feeding and get fine cross section quality.

The invention relates to a thumb mechanism of an artificial hand, in particular to a thumb mechanism of a humanoid hand and aims to solve the problem that a thumb of each of most existing artificial hand moves for grasp in one direction only. Rotation of a thumb of the thumb mechanism is achieved by worm-gear transmission. A function of bending for grasp is achieved for the thumb by worm-gear transmission and bevel gear transmission. A first knuckle and a second knuckle of the thumb are under-actuated by a plane four-bar mechanism. The thumb mechanism has the advantages that the thumb can rotate, bend for grasp and spatially move in a complex way during grasp motion of the thumb, the function of omnidirectional grasp can be achieved for the thumb, and various motion functions of a thumb of a human hand are achieved for the thumb of the thumb mechanism; a transmission mechanism of the thumb is in worm-gear transmission and has the self-locking function, and grasp torque of the thumb can be maintained after power failure of a motor; and the thumb mechanism is simple in structure, flexible to move, convenient to control, light in weight, small in size and large in thumb grasp strength.

An enveloping worm transmission is provided with a unique enveloping worm and worm gear with modified enveloping worm thread surfaces. Enveloping worm has general arrangements with worm gear on the face of worm gear. This invention offers combinations of enveloping worm with mating face worm gear where worm gear axis intersected, crossed or parallel to enveloping worm axis. The enveloping worm gear transmission is more efficient, quite and compact than conventional gear systems which have typically been used in power applications. The enveloping worm transmission of the present invention is easy manufacturing.

An arrangement for orienting a device angularly, such as an outside rear view mirror for a motor vehicle, is provided with a back element on which the device to be oriented is installed. The back element has a first portion of a coupling element, which may be in the form of a ball, and a first spherical gear arranged concentrically in relation to the first portion of the coupling element. A base portion having a second portion of the coupling element, which may be a corresponding socket, engages with the first portion (the ball) of the coupling element. In addition, a motor having a rotatory shaft is installed on the base portion, and a worm drive element is installed on the rotatory shaft and arranged to engage the first spherical gear when the first and second portions of the coupling element are engaged with each other. The engagement between the worm drive element and the first spherical gear is arranged to disengage in response to the application of a force through the first spherical gear, and may include an intermediate structure, such as worm gear-worm combination element.

A robotic gripper (10) has fingers (12) that are configured to grasp an object, and an actuator (20) for driving the fingers. The actuator has a drive train (30) connected to the fingers for driving the fingers, an impact mechanism (40) mechanically connected to the drive train for driving the drive train, and a motor (50) connected to the impact mechanism for driving the impact mechanism. The impact mechanism generates a series of impacts that are delivered to the drive train when the impact mechanism is loaded beyond a threshold torque. The drive train is a back-drive inhibited drive train provided by a worm drive (32, 34) that is mechanically coupled to the impact mechanism.

The invention discloses a power lock for an automobile side door. The power lock comprises lock components and actuator components, wherein an electric apparatus component in the actuator components is connected to a housing; a plurality of metal wires are pre-buried in the electric apparatus component; one end of each of the metal wires is positioned at a plug to be electrically connected with an auto body wire harness; the other end of each of the metal wires is connected with a motor; a rotating shaft of the housing is in sleeve joint with a safety gear which can rotate around the rotating shaft; the motor is communicated with the wires in the electric apparatus component; a worm and the safety gear form worm gear transmission; one end of an eccentric torsion spring is connected with the safety gear, the other end of the eccentric torsion spring is connected with the housing, and the safety gear is kept at one of two limit positions; one end of the safety gear is connected with a safety connecting bar; an inward-opening release lever sleeves the rotating shaft of the housing. According to the invention, an automobile key induction device receives a signal for an actuator, and the actuator controls the electric motor to act to realize disengagement of a ratchet wheel from a ratchet pawl so as to achieve unlocking.

The invention discloses a worm transmission device capable of eliminating a gear backlash and aims to achieve effects that the gear backlash is reduced or eliminated, precision transmission is realized, the bearing capacity is large, and the worm transmission device is convenient to machine and manufacture. The worm transmission device comprises a worm (10) and a worm gear (20), wherein the worm (10) consists of a left section of worm (11) and a right section of worm (12) which are coaxially arranged; left and right tooth surfaces are respectively formed by enveloping different surfaces of a sinusoidal line grinding wheel once; sinusoidal gear teeth are radially and uniformly distributed on the worm gear (20) and formed by enveloping a hob of which the shape is consistent with that of the worm twice; and an adjustment mechanism for adjusting the relative position and the relative rotation angle of the left section of worm (11) and the right section of worm (12) is arranged between the left section of worm (11) and the right section of worm (12).

The invention discloses a joint filling device for municipal floor tile laying. The upper part of a driving motor is rotatably connected with a crankshaft. The end part of the crankshaft is connectedwith a transverse plate through a bearing. The transverse plate is fixedly connected with a device body. The bending part of the crankshaft is connected with the right end of a connecting rod in a sleeving way. The left end of the connecting rod is rotatably connected with a piston plate. The piston plate is slidingly connected with the inner wall of a water spray chamber. The upper part of the water spray chamber communicates with a one-way valve. The one-way valve communicates with a water tank. The water tank is connected with the one-way valve through a duct. The lower part of the water spray chamber communicates with another one-way valve. The lower-part one-way valve communicates with an atomizing nozzle. According to the device, a turntable is driven to rotate through a rotating shaft to communicate with a discharging pipe in a reciprocating way, to intermittently discharge sand, stirring bars prevent sandstones in a sand box from lumping and not falling, a worm drives a worm wheel and a belt wheel to rotate, a lower belt wheel and a cleaning reel are driven to rotate synchronously through a first transmission belt, to sweep the sandstone on the ground into the joints of floor tiles, and the crankshaft drives the connecting rod to drive the piston plate to perform reciprocating left-right movements in the water spray chamber, to cause the water in the water spray chamberto be sprayed out for dustfall through the atomizing nozzle.

A surgical navigation tool for the computer aided surgical navigation system features that on the basis that the optical locating and tracking system is used to find the space position of surgical navigation tool, a set of five-freedom joint-type manipulator is designed. Said manipulator has a 4-class drive mechanism with self-locking worm-gear set, which has stable instantaneous drive ratio and high drive accuracy, so making the pilot template as its final class reach the surgical target position precisely.

The technology provides a multi-start worm milling machine with high indexing accuracy. The multi-start worm milling machine comprises a base, a main shaft box and a cyclone milling head, wherein the main shaft box is used for driving a processed worm to rotate, the cyclone milling head is used for milling the processed worm and comprises a milling cutter, the main shaft box comprises a box body, a main shaft actuating mechanism, a main shaft transmission mechanism and a main shaft, the main shaft actuating mechanism drives the main shaft to rotate through the main shaft transmission mechanism, the main shaft actuating mechanism is a main servo motor, and the main shaft transmission mechanism adopts a worm gear for transmission.