107 results about "Hypocycloid" patented technology

A vehicle seat comprises a backrest mounted on a seat by means of a pivot mechanism comprising two flanges fixed respectively to the seat and the backrest and linked one to the other by means of a single-train hypocycloid gear mechanism which causes the backrest to pivot about an axis of rotation which in turn moves in circular translation about a fixed axis. The gear mechanism is driven by a control shaft which is centered on the axis of rotation on a level with said gear mechanism and which has a part forming a crank comprising an end centered on the fixed axis, which end is driven in rotation by an electric motor mounted on the seat part.

The invention is a planetary gearing, designed by hypocycloid forming and engaging principles, engaging hypocycloidal wheel with pin gears, using a hypocycloidal wheel with external equidistant curve of curtate hypocycloid (or hypocycloid) as a center wheel, and using pin gears with pin teeth as planetary gear mounted on a tumbler shaft with eccentric distance A, where a pinhole output mechanism directly drives front transfer dish, rear transfer dish and balanced transfer ring of a combined output shaft by extensions of long pin teeth on the pin gears, to make angular speed output of two pin gears with 180 deg. phase shifted in equal speed ratio. And it has many advantages of the existing cycloidal-pin gear planetary gearing and can largely improve load-bearing capacity and transfer power, reduce bulk of driving device, improve rigidity and shock resistance of output shaft, realize dynamic balance of input shaft, and apply to high speed, heavy load and large power driving.

The invention belongs to the field of amorphous silicon solar cell drilling and provides a laser drilling method for an amorphous silicon solar cell glass substrate. The laser drilling method comprises the steps that firstly, a membrane face of the glass substrate coated with a membrane layer is upward, and a membrane layer within a round ring is removed inwards from the edge of the portion to be drilled; secondly, within the round ring without the membrane layer, layered laser drilling is conducted on the lower surface of the glass substrate. By the adoption of the laser drilling method, the membrane face of the amorphous silicon solar cell glass substrate is placed on a processing production line, the membrane layer within the round ring is removed through laser, and drilling is conducted along the track of the hypocycloid in a layered mode; in this way, the equipment cost is reduced, production line processing of amorphous silicon solar cell glass substrates is guaranteed, and the membrane face of the membrane layer is prevented from being polluted.

The invention discloses a space engine-driven tail swing propelling plant which comprises a K-H-V type linear hypocycloid planetary gear train, a planetary plate external plate rotating device, a space ball accessory rod system, an engine-driven control mechanism and a tail fin direction control mechanism. The K-H-V type linear hypocycloid planetary gear train and the space ball accessory rod system comprehensively act to achieve swing/flapping of the tail of a robotic fish. The planetary plate external plate rotating device drives a planetary plate to rotate. The swing/flapping movement direction of a tail fin connection rod is changed by changing the position of a movement output point on a planet gear on a planet gear dividing circle. The engine-driven control mechanism drives a movable rack to rotate to achieve turning maneuver and rising and submerging of the robotic fish. The tail fin direction control mechanism controls the water striking angle of the tail fin to keep the tail fin at the optimal water striking angle. By means of the space engine-driven tail swing propelling plant, free switching between carangidae mode swimming and dolphin mode swimming is achieved, the mechanism principle and structural composition are simple, the tail fin movement is free of quick-return, and the space engine-driven tail swing propelling plant is suitable for being applied to power devices of automatic underwater crafts.

The invention relates to the technical field of shield machine speed reduction, and discloses a soil pressure balance shield machine hypocycloid speed reducer. The soil pressure balance shield machine hypocycloid speed reducer is characterized in that: a cycloid driving part is arranged in a cavity formed by connecting a front end cover with a back end cover by using a pin wheel housing, wherein the phase differences between a first wheel and a second wheel and between a third wheel and a fourth wheel in four cycloidal wheels on a double-eccentric bearing are 180 degrees, and the phase of the second wheel is the same as that of the third wheel; and a W output mechanism consists of an output shaft, a pin and a uniform loading plate, the pin is provided with three circular ring plates to form a four-section freely supported structure, and the W output mechanism is supported in an inner hole of the front end cover and an inner flange outer circle of the back end cover through a bearing respectively. The soil pressure balance shield machine hypocycloid speed reducer has the following advantages that: (1) the axial size is 45 to 55 percent shorter than that of a third-class planetary reduction gear of the background art; (2) the cycloidal wheels can be assembled in a reversed mode to double the service life; (3) the manufacturing cost is 40 to 50 percent of that of the third-class planetary reduction gear of the background art; and (4) the inertia force and the inertia moment in operation are theoretically completely balanced.

The invention belongs to the technical field of spaceflight servo mechanisms and particularly discloses a cycloidal pin wheel speed reducer. The cycloidal pin wheel speed reducer comprises an input support, an output support, an input shaft and an output shaft, wherein the input support and the output support are fixedly connected, wherein the input shaft is an eccentric shaft, a non-outer-ring needle bearing is arranged outside the input shaft, an epicycloidal wheel is arranged outside the needle bearing, needle teeth are arranged outside the epicycloidal wheel in a meshing mode, an output shaft supporting bearing is arranged outside the shaft end of the output shaft, and the output support is located outside the output shaft supporting bearing. A retainer and a connection bolt are structurally omitted, and a W output mechanism is omitted, so that the axial size of the reducer is short, and a structure is more compact. The needle teeth are designed to be of eccentric structures, the epicycloidal wheel is eccentrically arranged relative to a hypocycloid wheel, the needle teeth eccentrically rotate while the positions of the rotary centers are fixed, and the rotary centers of the needle teeth are distributed on a concentric circle coincident with the rotary center of the hypocycloid wheel. The structural form is favorable for increasing the tooth number of the needle teeth meshed with the cycloid gears at the same time, and bearing capacity for transmission is improved.

The invention relates to the technical field of reducing the speed of an ore grinding machine. A reducer with a bevel gear and a hypocycloid in large transmission ratio for an ore grinding machine is characterized by comprising a bevel gear pair and a cycloid transmission part; the bevel gear pair comprises driving and driven bevel gears and the cycloid transmission part is composed of a machine body, an input shaft, eccentric bearings, a cycloid gear, an inner cycloid gear ring, a W mechanism and bearings; the W mechanism comprises an output shaft, a column pin, a uniform loading disc and an annular plate; in the W mechanism, the output shaft is supported on an inner hole of the machine body through utilizing the bearing and an inner hole of the uniform loading disc is supported on the outer circle of a flange of an end cover through utilizing the bearing; in four single-eccentric bearings: the phase difference between the first bearing and the second bearing and the phase difference between the third bearing and the fourth bearing are 180 DEG and the phase of the second bearing is same as that of the third bearing. In the invention, the reducer has the beneficial effects as follows: (1) the hypocycloid gear is engaged by purely rolling, so that the bearing capability is improved by 2-3 times; (2) the length of the axial direction is reduced by 45-55% and the cost is reduced by 40-50%; (3) the reversed installation service life of the cycloid gear is doubled; and (4) the inertia force and the inertia moment are completely balanced in theory when the reducer is operated.

The invention relates to a non-axial working End-of-Content mechanism which is geared by a hypocycloid gearing. The EoC mechanism comprises a first element (30, 109) having a first internal surface (36, 136) with a first internal diameter (D), and an EoC element (50, 150) having a second external surface (56, 156) with a second external diameter (d) being smaller that the first internal diameter (D). The EoC element (50, 150) is located inside the first internal diameter (D) of the first element (30, 109) and the first element (30, 109) and the EoC element rotates relatively to each other in a gearing ratio. The EoC element (150, 150) thus operating as the inner rolling circle of a hypocycloid counting the numbers of relative rotations. The EoC mechanism further has stopping means (45, 55; 113, 155)) provided for stopping the relative rotation in a predetermined position which position correlates to the initial injectable content of drug in the injection device such that a user cannot at any time set a dose larger than the quantum left in the injection device at any time.

Provided are a position detection device for a vehicle, having a compact structure, capable of being produced at low cost, and capable of always detecting the absolute position of a movable body, located on the vehicle, moved from a reference position, and a seat position detection device. The position detection device (14) detects the position of the movable body, the movable body being that which is moved by driving force of a rotation drive source (70a). The position detection device (14) has a reduction gear (50) and a rotation sensor (51). The reduction gear (50) has a two-stage hypocycloid mechanism for reducing the number of rotations of a rotating shaft (41), rotated by a multiple number of times by the drive source (70a) when the movable body is moved, to not more than one. The rotation sensor (51) detects, as an absolute angle, a rotational output from the reduction gear (50). The position of the movable body is detected based on the absolute angle detected by the rotation sensor.

A method and device for turning-milling compound machining of a rotor of an oil extraction screw pump. A major objective is to provide a method and special device for machining a double-headed rotor of an oil extraction screw pump, which allow easy machining, short period and simple operation. The method is characterized in that: one edge of a triple-headed stator is selected as a cutting line fora cutter; a cylindrical milling cutter may be used as the cutter and the cutter is used to cut the periphery of a rotor; a driving device for a rotor may achieve planetary motion; a rectangular coordinate system is established with the minor axis and the major axis of the cross section of the rotor to be machined; a straight line, parallel to the coordinate axis of the major axis of the rotor, ofa triple-headed curtate hypocycloid of the oil extraction screw pump at an amplitude variation coefficient of 0.5 is taken as an end mill; the planetary motion of a rotor bar to be machined may be achieved by using a fixture; and the size of the section of the rotor and a rotation position of the section may be controlled through the motor of the end mill in the radial and axial directions of therotor bar to be machined, thereby achieving machining of the rotor.

The invention discloses a continuous hobbing method for a straight bevel gear. The continuous hobbing method is based on a special hypocycloid approximating a straight line. A cutterhead rotates at the speed being omega t, a gear rotates at the speed being omega g, and at the moment, relative movement of the gear and a cutter is equivalent to pure rolling engagement movement of cutter rolling and gear rolling. When the rolling radius and the reference radius of the cutter are the same or equal to one half of the gear rolling radius, the track formed by cutter noses of cutter teeth on the gear is an approximate straight line, and therefore the cutter and the gear can be used for continuous hobbing of the straight bevel gear. The continuous hobbing method has the advantages that the continuous hobbing technology is adopted, and therefore production efficiency and precision are high; both wet hobbing and dry hobbing can be achieved, the dry hobbing efficiency is higher, the tooth surface finish degree is better, the requirement for the cutter and a machine tool is higher, and wet hobbing just gets the opposite results; the machined straight bevel gear is in a slight drum shape instead of a strict straight line shape in the tooth length direction. The drum-shaped size can be controlled by adjusting machine tool parameters, so that the contact area of the gear is changed to enable the gear to have the better transmission performance, and gears with constant-depth teeth and shrinkage teeth can be machined.

The present invention relates to a reduction gearing with a ring gear, at least one planet gear rolling around in the ring gear and having a planet gear axis, and an output being rotatably mounted coaxially to the ring gear. According to the invention, it is provided that the planet gear comprises a guide member that is spaced apart from the planet gear axis and describes a hypocycloid relative to the ring gear when the planet gear rolls around, wherein guidance is provided between the guide member and a cam disk of the output, such that the output experiences a drive motion by the planet gear rolling around.

A gerotor mechanism is used to guide the rotation of a turntable having a Reuleaux triangle shape. In one version, the mechanism includes a gerotor having three lobes, and the gerotor guide has a guide profile including four recesses for receiving the lobes of the gerotor. Rotation is governed by a 4:3 hypocycloid function. The profiles of the gerotor and the gerotor guide are expanded uniformly from an original hypocycloid pattern so that rotation of the turntable results in execution of the hypocycloid function while retaining the gerotor in controlled contact with the profile of the gerotor guide. A reciprocal of the hypocycloid function yields a “cloverleaf” gerotor. Substantially planar bearing surfaces may be used at the interface of (a) the turntable and the gerotor guide, (b) the gerotor and the gerotor guide, or (c) the gerotor and the underlying support surface. The gerotor guide and turntable may be part of a cabinet or built into a kitchen countertop.

The invention relates to a multidirectional propulsion system for ships, including a mechanical hypocycloid transformer, which comprises a drive system (100) of the mechanical hypocycloid transformer type and which performs two basic functions, namely: generating the oscillating rotational movements of the two concentric shafts (15, 16) in order to move the propeller blades, and rotating integrally about the geometric axis thereof, such that the range of the sweep angle of the swing frames (17, 17′) can be varied gradually between an upper threshold and a lower threshold both when the propulsion system is in operation and stopped. The invention also includes a multidirectional connection system which can change the orientation of the propulsion force of the blades and, consequently, the direction of movement of the ship and which comprises a clutch on each concentric shaft each clutch having two discs. The invention further includes a submerged part, formed by a fish-tail propulsion.

The invention discloses a hypocycloid single cylinder diesel which replaces the traditional crank link mechanism with a set of novel hypocycloid energy transformation mechanism to realize the interconversion of the complete linear movement of the piston and the rotary movement of the crankshaft and to output power. A left crankshaft (8) and a right crankshaft (11) of the hypocycloid energy transformation mechanism are respectively mounted at the left and right sides of a case (5) by bearings; the left crankshaft (8) and the right crankshaft (11) are respectively connected with a central eccentric crank shaft (13) by two slide bearings (17); two planet gears (9) are provided in the invention which are fixed at the two ends of the central eccentric crank shaft (13); the two planet gears (9) are respectively meshed with two annular gears fixed at the case to form two pairs of gears. Compared with the traditional crank link mechanism type single cylinder diesel, the hypocycloid single cylinder diesel eliminates the side pressure of the piston on the cylinder, has the advantages of high transmission efficiency, low fuel oil consumption and high output power.

The invention provides a high pressure shielding cycloid pump. The high pressure shielding cycloid pump has small gap flow discharge amount and high stability, is coaxial with a motor and having no dynamic seal. The high pressure shielding cycloid pump comprises an end cap, a shell, an epicycloid rotor, a hypocycloid rotor, a shaft, bearings, a motor stator, a motor rotor and a position sensor; the bearings are arranged at two sides of the motor rotor, the hypocycloid rotor is arranged at the cantilever end of the shaft through a key, the hypocycloid rotor and the motor rotor are respectively connected with the same shaft, a lining is arranged at the inner side of the shell, the lining is in transition fit with the shell, and the lining is eccentrically arranged in the shell; and compensation side plates are arranged at two sides of the hypocycloid and epicycloid rotors, the compensation side plates are positioned at the inner side of the lining, a left side seal and a right side seal are arranged between the compensation side plates and the cover plate and between the compensation side plates and the shell, and the shaft is provided with an axially-penetrating center hole. The technical problems of large gap flow discharge amount, easiness in deviation of performances, poor stability and poor dynamic seal reliability of present cycloid pumps are solved in the invention.

The invention discloses a double-wave-line ball deceleration bearing with high rotary precision. The bearing comprises an input shaft, wherein the input shaft comprises a first mounting part, an eccentric part and a second mounting part sequentially connected in the axial direction; a first shell is movably arranged on the periphery of the first mounting part in a sleeving manner; an annular avoiding groove is formed in the first shell; a driving disc is movably arranged on the periphery of the eccentric part in a sleeving manner and is positioned in the avoiding groove; a ball mechanism is arranged between the driving disc and the inner end face of the avoiding groove; a second shell is movably arranged on the periphery of the second mounting part in a sleeving manner; a hypocycloid groove is formed in the second shell; an epicycloid groove is formed in the driving disc; the wave number of the hypocycloid groove is greater than that of the epicycloid groove; and a plurality of first balls are distributed between the hypocycloid groove and the epicycloid groove. The invention aims to provide the double-wave-line ball deceleration bearing which can increase the reduction ratio and reduce the wear loss, is small in error and transmission ratio error, and has multiple output modes.

A hypocycloid reducing apparatus includes a hollow outside bracket, a hollow inside bracket and a driven input that is rotated by a rotating mechanism, such as a motor. The outside bracket has a passage with N quantity of lobe grooves. The inside is rotatably mounted in the passage of the outside bracket and has an inner space, M quantity of through holes and an output shaft. The through holes are arranged in an annular arrangement, are aligned with the lobe grooves and each through hole holds a roller. The driven input is mounted rotatably in the inner space and has an off-center assembly to encounter sequentially with each roller to actuate rotating the inside bracket. Therefore, a speed of revolution of the rotating mechanism is reduced to the output shaft. A volume of the reducing apparatus is minimized, as is noise produced during operation.

A speed reducer includes a first transmission shaft, an eccentric wheel, a first roller assembly, a rotating wheel, a second roller assembly and a second transmission shaft. The rotating wheel includes a main body and an axle hole. The main body includes a convex structure and a concave structure. The convex structure is protruded from an outer periphery of the main body and has outer teeth. The outer teeth are contacted with the corresponding first rollers. The concave structure is concavely formed in a surface of the main body and includes inner teeth. The inner teeth are contacted with plural second rollers of the second roller assembly. The speed reducer of the present invention is an epicycloid-epicycloid speed reducer or a hypocycloid-hypocycloid speed reducer. Since the speed reducer is designed to have four operating situations, the speed reducer can have various reduction ratios.