146results about How to "Small backlash" patented technology

The invention discloses an exoskeleton type upper limb rehabilitation training robot, which includes a base, two mechanical arm assemblies and six motor drive assemblies; the base includes a mobile base, an electrical box, an electric lifting column, a base platform, Motor mounting angle bracket, base rotating motor, coupling, base main bearing seat, base ball screw nut assembly, base nut seat, base common sub-bearing seat, right bracket, base linear guide assembly and left Bracket; the mechanical arm assembly includes a mechanical shoulder belt assembly, a mechanical shoulder joint assembly, a mechanical elbow joint assembly, a mechanical forearm assembly, a mechanical wrist joint assembly, and a mechanical hand assembly; the motor drive assembly includes a motor and a deceleration assembly, a torque sensor assembly and The transmission assembly, the motor and deceleration assembly, the torque sensor assembly and the transmission assembly are all mounted on the same motor-driven base frame. The invention can be worn on the upper limbs of the human body, and can be used to assist the upper limbs of the human body to move in three-dimensional space and carry out rehabilitation training.

The invention discloses a two-wheeled numerical control roll grinder and a numerical control method thereof. A small sliding frame of the double-wheeled numerical control roll grinder is provided with a U-axis micro-feeding mechanism, a main mechanical transmission case is lubricated by adopting an active lubricating loop, a cooling water purifying device is arranged on a grinder body, a large sliding frame guide rail is connected with a Z-axis guide rail hydraulic station through a lubricating oil tube, the Z-axis guide rail hydraulic station is subjected to dynamic pressure lubrication, a grinding wheel and an abrasive belt wheel are respectively connected with a shared mainshaft hydraulic station, a hybrid bearing and a capillary tube adjuster are respectively arranged at the front and the back of a main shaft of the grinding wheel and a main shaft of the abrasive belt wheel, and the mainshaft of the grinding wheel and the mainshaft of the abrasive belt wheel are subjected to dynamic and static pressure lubrication. According to the invention, due to adoption of a numerical-control setting manner, a roll curve is easy to change, ground workpieces are higher in quality and are easy to automatically control, the manual misoperation probability is lowered, a very excellent repeatable machining purpose is achieved and the quality of batch production can be ensured.

According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the outer gerotor chamber, and a synchronizing apparatus operable to control the rotation of the inner gerotor relative to the outer gerotor. The inner gerotor includes one or more entrance passages operable to communicate a lubricant into the outer gerotor chamber.

A gear mechanism having extremely less backlash, capable of suppressing the rattling noise of gears, having a large loading resistance in the thrust direction, and capable of transmitting high torque by using the gears transmitting a force by the meshing of the gears with each other in place of the transmission of the force by friction. The gear mechanism is formed by disposing the plurality of spur gears in the meshed state with each other. The screw-like gears (2) and (4) are disposed on the same axis as the spur gears (1) and (3) in the meshed state with each other. The screw-like gears (2) and (4) adjacent to each other are formed in screw shapes having lead angles extending in the reverse directions to each other and equal in angle to each other. The spur gear (1) and the screw-like gear (2) are rotated integrally with each other to transmit its rotation to the spur gear (3) and the screw-like gear (4) adjacent to each other.

The invention discloses a planetary speed reduction type eccentricity-adjustable helical hole-milling device. The planetary speed reduction type eccentricity-adjustable helical hole-milling device is characterized by comprising a rotation system, a revolution system, a radial eccentricity adjusting system, a clamping braking system assembly and an axial feeding system. The radial eccentricity adjusting system can achieve precise trace linear eccentricity adjustment with high transmission ratio, and required input power is small. Compared with sliding block adjusting structures disclosed by existing patents, the radial eccentricity adjusting system can perform adjustment conveniently with less labor, and compared with a dual eccentric sleeve structure and an offset sliding block structure, the ratio of the size of the adjusting structure to the size of a rotation power source is greatly decreased, the occupied space is reduced, and the dead weight is reduced relatively in case of the identical material. Compared with an electromagnetic brake, the clamping braking system assembly can perform braking easily and conveniently; compared with a radial screw holding structure, the required pretightening force is small, and clamping is reliable; and compared with a worm and gear structure, self-locking never fails, and the working stability is high.

The invention relates to a two-motor drive modular joint. According to the two-motor drive modular joint, an output shaft is rotationally connected with a shell and fixedly connected with an output gear; the output shaft comprises a through hole extending in the axial direction; the shell comprises a penetrating hole corresponding to the through hole, and the through hole and the penetrating holeare used for storing a line; the output shaft further comprises a radial channel which cooperates with a zero-bit detection module to determine the zero bit; a first gear and a second gear are engagedwith the output gear and are free of interference; a first servo motor is connected with the first gear and a first motor encoder; and a second servo motor is connected with the second gear and a second motor encoder. The two-motor drive modular joint can eliminate the gap between the output gear and a drive device, so that transmission is more precise, and the joint can still run in a gapless mode even when the gears are abraded. The zero-bit detection module is used for determining the zero bit of the output shaft. Through cooperation of the penetrating hole and the through hole, various cables can be arranged inside the joint, and thus the joint is simple and compact as a whole.

The invention discloses an electric height adjusting device for a seat. The electric height adjusting device comprises a seat height adjusting toothed plate and an electric mechanism driving the seat height adjusting toothed plate to rotate. The electric mechanism comprises a reduction gearbox body, a motor, a worm, a bevel gear component, a flexible bearing, a flexible wheel, a rigid wheel body, a reduction gearbox cover and an output transmission piece. The direct-current motor is used as a power source of the electric mechanism, motor torque is transmitted to the worm and then transmitted to the bevel gear component through the worm, and first-level speed reduction of the electric mechanism is composed of the worm and the bevel gear component. After first-level speed reduction transmission is completed, power is output to the output transmission piece through a harmonic gear mechanism composed of the bevel gear component, the flexible bearing, the flexible wheel to be output. The electric height adjusting device for the seat has the advantages of being small in size, large in output torque, large in transmission ratio, high in transmission precision, small in return stroke clearance, high in bearing capacity and the like, adjustment handleability and the overall strength of the seat are increased, and the noise level is greatly lowered.

The invention belongs to the technical field of planetary gear transmission, particularly relates to a precise planetary gear transmission device with small back clearance, low no-load torque and large rigidity and an assembly method thereof, and the planetary gear transmission device is widely used for actuating mechanisms of various servo drive systems. The planetary gear transmission device disclosed by the invention adopts an eccentric planetary gear shaft structure which does not rotate with planetary gears, and eccentric planetary gear shafts are rotated so that the planetary gears are close to an inner gear ring, therefore, the tooth gaps of the planetary gears and the inner gear ring are reduced. The assembly method of the planetary gear transmission device comprises the following steps of: consistently rotating the eccentric planetary gear shafts so that the planetary gears are close to the inner gear ring; after the gear backlashes of the inner gear ring and the planetary gears are regulated, measuring and calculating the appropriate tooth thickness of a sun gear by using a special tool; and then grinding an appropriate sun gear in a matching way. The integral planetary line gear can obtain the smallest backlashes, the low no-load torque and the large rigidity under the condition of no clamping or previous tightening through the measures.

The invention relates to a turning and milling composite functional unit for a numerical control machine, in particular to a modularized B-axis turning and milling composite functional unit, which comprises a B-axis module and a turning and milling head module, wherein the B-axis module comprises a driving device, a three-fluted-disc indexing structure and a brake structure, the turning and milling head module comprises a motor driving device and a three-fluted-disc fixing device, the turning and milling head module id driven by a built-in motor, and is provided with a three-fluted-disc locking structure, during turning, three fluted discs are locked to ensure structure rigidity, during milling or drilling, the three fluted discs are loosened, and a main shaft rotates to drive a cutter to carry out processing. The B-axis module is driven by the built-in motor, during indexing processing, the three-fluted-disc locking structure is adopted to ensure the structure rigidity and the indexing accuracy; and during processing at any angle, the brake mechanism is adopted to ensure the processing rigidity. The B-axis module and the turning and milling head module are connected through screws, and according to processing requirements, different turning and milling heads are replaced so as to expand processing capability.

The invention provides a two-stage-parallel cycloidal steel ball speed reducer, belonging to the field of precise mechanical transmission. The two-stage-parallel cycloidal steel ball speed reducer comprises a shell, an input shaft, a planetary disk I, an eccentric sleeve I, a steel ball set, a planetary disk II, an eccentric sleeve II, a steel ball set, an end cover, an output shaft, a pretension nut, a support bearing and a bearing end cover. The speed reducer adopts the NN two-stage-parallel few-tooth-difference planetary transmission basic structure; by using the inner and outer cycloidal sealed grooves in the end surfaces of the end cover, planetary disk and output shaft as tooth profiles and using steel balls as a medium, meshing transmission is performed; and the four-point contact of the steel balls and cycloidal sealed grooves is utilized to eliminate the tooth space. The speed reducer has the advantages of simple structure, small size, high transmission ratio, zero tooth space, high transmission accuracy and low impact. Meanwhile, as distinguished from the common NN cycloidal steel ball transmission, the two planetary disks are installed on different eccentric shaft sections in a 180-degree symmetric mode, and connected through a steel ball ring groove constant speed unit, thereby achieving the balance between meshing force and inertia force. The speed reducer has the advantages of small inertia force during transmission operation, low load of the swing arm bearing, and long service life.

A simple planetary gear mechanism with an automatic centering function to support the planetary gears, thereby obtaining a reducer with reduced backlash through a simple method. The planetary gears (14) are supported by bracket pins (30) supported by the bracket. The bracket pin (30) includes a crank portion (32) which is eccentric "e" with respect to the axis of the bracket pin and whose eccentric angle α is variable. The planetary gear (14) is rotatably supported around the axis of the crank portion (32). As a result, by making the eccentric angle variable, the shaft centers of the planetary gears are automatically aligned in the radial direction when assembling each gear, so that the backlash can be adjusted to the minimum just by assembling a sun gear of an appropriate size.

The invention relates to a snake-like robot joint, in particular to a modular snake-like robot joint. The problems that due to combination of a servo driving mode and a gear transmission mode, an existing snake-like joint is large in reverse backlash, long in control period, low in precision and poor in positioning capacity are solved. The modular snake-like robot joint comprises a joint input part, a joint output part, an intermediate shaft section, a motor assembly and a harmonic reducer, wherein the joint input part and the joint output part are arranged at the two ends of the intermediate shaft section correspondingly; the motor assembly and the harmonic reducer are arranged inside the intermediate shaft section side by side; the output end of the motor assembly is connected with the harmonic reducer and drives the harmonic reducer to rotate; and the harmonic reducer drives the joint output part to make swinging motion with the intermediate shaft section as an axis. Through arrangement of a torque sensor and a joint output end position sensor for measuring force-position information of the snake-like robot joint, the perceptive function of a robot is improved, and the robot can be controlled conveniently. The modular snake-like robot joint is applicable to snake-like robots.

A steel wire transmission system includes plural slide rail seats, plural slide rails, plural wheel sets corresponding to the plural slide rails, plural slide blocks, plural steel wires, plural guide rods and a printhead module. The plural slide rails are disposed on the corresponding slide rail seats. Each wheel set includes a driving wheel and a driven wheel corresponding to the driving wheel. The driving wheel and the driven wheel of each wheel set are fixed at two ends of the corresponding slide rail. Each slide block is sheathed around the corresponding slide rail and movable between the corresponding driving wheel and the corresponding driven wheel. The plural steel wires are wound around the corresponding wheel sets. Each guide rod is connected with two corresponding slide blocks. The printhead module is connected with the plural guide rods.

The invention relates to an electric machine, in particular a starter device (10) for an internal combustion engine. The electric machine comprises a noise-optimized toothing system (232, 234) of two gearwheels (22, 25) which can be brought into engagement with one another. The noise-optimized toothing system (232, 234) is configured as an extra-deep toothing system on at least one of the gearwheels (22, 25). The extra-deep toothing system has an asymmetrical toothing profile (214).

The invention provides a slide block mechanism for reducing transmission backlash of rack and pinion. The mechanism comprises a pinion, a rack, a decelerator and a motor, the pinion is mounted on the output shaft of the decelerator, the motor or the decelerator is connected with the decelerator, the decelerator is mounted on the slide block, the slide block is glidingly mounted on a bracket and has one movement freedom degree only, the bracket is mounted on a movable member, and a compression spring is provided between the slide block and the bracket. The invention provides a new method, which is safe and reliable and is convenient for mounting, for reducing lateral clearance of the rack and the pinion; the compression spring is employed to minimize the distance between the pinion, which is mounted on the output shaft of the decelerator on the slide block, and the rack, which is meshed with the pinion, thus realizing the objective of reducing the backlash.