32results about How to "Eliminate running noise" patented technology

The present invention relates to an actuator apparatus of an active accelerator pedal, which can provide a driver with a pressing-force rise mode or a vibration mode in accordance with the operational condition of the accelerator pedal and the traveling condition of the vehicle; therefore, it is possible to improve fuel efficiency and also help safe traveling. An actuator apparatus of an active accelerator pedal of the present invention includes: an actuator housing fixed to a pedal arm housing; a stator fixed to the actuator housing and electromagnetized by current transmitted though the control of an ECU; a carrier having one end disposed in a stator and the other end disposed toward the pedal arm through the actuator housing, and applying pressing-force to the pedal arm while protruding from the stator when current is applied to the stator; and a position sensor disposed in the actuator housing and detecting the amount of rotation of the pedal arm to determine the amount of current applied to the stator through the control of the ECU.

An ink ribbon cartridge includes spools each including a ratchet gear in one end portion. A cartridge body includes integrally formed resilient engagement pieces each including a ratchet portion that engages and disengages the ratchet gear of the respective spool and a compressed portion that is compressed by a compressing portion of a thermal transfer printer apparatus. When the ink ribbon cartridge is installed in the thermal transfer printer apparatus, the resilient engagement pieces behave such that the compressed portions are compressed by the compressing portions of the thermal transfer printer apparatus. Thereby, engagement between the ratchet gears of the respective spools and the ratchet portions is released, and the spools become rotatable in the cartridge body.

An electromechanical actuator for a home automation closing or sun protection installation includes an electric motor, a reduction gear and a spring-operated brake (15), which includes a helical spring (22), a drum (23), an input member (24) and an output member (25). The drum (23) includes a housing (26). An inner friction surface (27) of the housing (26) of the drum (23) cooperates with at least one turn of the helical spring (22). The spring-operated brake (15) also includes at least one ring (50) positioned between an outer surface (51) of the input member (24) and/or the output member (25) and the inner friction surface (27) of the housing (26) of the drum (23). The home automation installation includes one such actuator.

A watch winder fully winds the watch main spring of various brands of automatic watches, avoiding wear and tear caused by excessive winding caused by prior art winders. In contrast with prior art watch winders, which wind watch main springs a predetermined number of turns, the inventive watch winder precisely detects a fully winded condition of the watch main spring, and stops winding. Prior art watch winders lack that sensing feature, so they continue winding fully winded watches until the predetermined number of turns has been completed. Additionally, the inventive watch winder eliminates the need to guess the number of turns and direction of rotation for different watches. The inventive subject matter further includes methods, which employ deviations in rotation speed to determine watch main spring winding states, such as under-winded, mid-winded, and fully-winded.

A variable intake device of an engine may include an auxiliary intake duct that may be disposed with one end thereof inserted inside an air cleaner and sucks air, and a magnetic variable valve that may be disposed at the one end of the auxiliary intake duct positioned inside the air cleaner to selectively open or close the auxiliary intake duct so that as intake negative pressure increases, an open angle of the magnetic variable valve increases.

A controller has a state observation unit to acquire a present state of a robot as a state variable, a label data acquisition unit to acquire, as a label, a detected value of a force sensor attached to an arm and to detect necessary data for control of a pressing force, and a learning unit to generate a learning model indicative of the correlation between the state variable acquired in a no-load state and the label acquired under the state variable acquired in the no-load state and to estimate the detected value of the force sensor. The controller controls the pressing force by using the detected value of the force sensor acquired in the present state of the robot acquired in a loaded state and the detected value of the force sensor estimated by the learning unit based on the present state of the robot acquired in the loaded state.

The invention discloses a processing method for a gear of an electric wheelchair. A wheel blank of the gear is formed by directly pressing an iron-based powder metallurgy material; the wheel blank subjected to pressing formation adopts a fine turning manner to process a datum hole and two positioning end faces and a key slot is drawn on the inner wall of the datum hole; and then the hobbing and gear shaving processing are carried out. According to the invention, the rough turning processing and the heat treatment hardening and tempering process of the gear blank are saved; the processing on a cavity with a complex shape and a lightening hole on the gear blank are abolished; the production process only comprises the steps of carrying out fine turning on a datum, drawing the key slot, carrying out hobbing, carrying out gear shaving and carrying out rustproof packaging; the cost is reduced; the production period is shortened; after the gear is subjected to shaping treatment under the conditions of the tooth profile of 0.005 to 0.008mm and the tooth direction of 0.017 to 0.023mm, the noise reaches a low noise range of 62dB per inch, the operating abnormal sound of the gear is completely eliminated and the qualified rate of the product is over 98.5%.

The invention belongs to the technical field of heat exchange equipment, and particularly relates to a silent operation control method of an air conditioner. The method aims to solve the problems thatthe noise reduction effect of an existing physical noise reduction mode is not ideal, and the silent operation of the air conditioner is difficult to realize. According to the silent operation control method of the air conditioner, the preset silent pressure can be used as a comparison standard of the real-time system pressure of the air conditioner, so that the rotation speed of an outdoor fan of the air conditioner can be selectively reduced based on the specific difference value of the current system pressure and the preset silent pressure of the air conditioner, so that the air conditioner is prevented from operating at a fixed large rotation speed of the outdoor fan in the whole process of refrigerating/heating, most operation noise of the air conditioner is eliminated fundamentally,and the aim of quiet operation of the air conditioner is achieved.

The invention provides an automatic pushing-pulling device of an overhead manned cable car. The automatic pushing-pulling device comprises a guide part and at least one driving part, wherein the driving part comprises a driving wheel and tensioning resisting wheels arranged at two sides of the driving wheel; the driving wheel is arranged at one side of an upper-layer steel wire rope on the cable car; the two tensioning resisting wheels are arranged at the other side of the upper-layer steel wire rope; the driving wheel is connected with the guide part through a transmission shaft; the guide part comprises an arc-shaped paved rail adaptive to a corner radian; a machine head guide wheel and a machine tail guide tail wheel are arranged at two ends of the paved rail respectively; the driving wheel is connected with the machine head guide wheel or the machine tail guide tail wheel; a transmission belt is arranged between the machine head guide wheel and the machine tail guide tail wheel; aplurality of pulling claws are arranged at the outer side of the transmission belt.

Provided in the invention is a frequency conversion system of an elevator. The frequency conversion system is composed of a three-phase power supply, a three-phase motor, an energy feedback device, a frequency converter, a control circuit, a bus capacitor and an energy consumption device. The frequency converter includes three first triodes and three second triodes. The energy feedback device feeds energy generated by braking of the three-phase motor back to the three-phase power supply. When the voltage of the bus capacitor exceeds a security value, the energy consumption device works. When power of an elevator is cut off and secure evacuation is carried out, the control circuit controls the three first triodes in the frequency converter to be disconnected and the three second triodes to be connected simultaneously, so that three input terminals of the three-phase motor are in a short-circuit mode. Therefore, functions of energy feedback and braking are integrated into one. Operation noises of the elevator can be eliminated; the service life of the product is prolonged and security of the product is improved; the size is reduced; and the cost is lowered.