147results about How to "Reduce mechanical shock" patented technology

The present invention provides a method for actuating a brushless double-feed electric motor and the device thereof. The actuating method comprises the following procedures: executing self-checking to the transducer and controller before the actuation of the brushless double-feed electric motor; controlling a winding series resistance by the brushless double-feed electric motor, energizing a power winding for asynchronous actuating; taking the asynchronous steady speed at this time as a synchronous steady speed of double-feed operation, leading to that the transducer outputs the corresponding frequency, disconnecting the control winding from the staring resistance, switching to the transducer for electric supply, and changing the operation mode of the electric motor from asynchronous mode to double-feed operation mode at this time; and adjusting the output frequency of the transducer by the controller according rotating speed and the datum speed of the electric motor until the requirement of rotating speed of the electric motor is satisfied. The control device is composed of a power winding, a control winding, a stator of the brushless double-feed electric motor and a rotor of the brushless double-feed electric motor. The device of the invention has the advantages of small current impact, small electrical torque and oscillation amplitude of the rotating speed, less number, small mechanical impact, excellent protection to the electric motor, reduction of impact to the electric network, and effective reduction to the actuating capacity of the transducer of the control winding.

The invention discloses a motor direct-driven transmission device of a door lock and an intelligent door lock. The motor direct-driven transmission device mainly comprises an inner door panel, a bottom plate, a lock core, a shifting strip and components like an unlocking rotary knob, a driving bevel gear, a gear motor, a motor bevel gear, an optoelectronic switch, an optical grating coding disc, a buffer cushion and a locking cover. According to the motor direct-driven transmission device, the lock core is driven to rotate through the gear motor, automatic locking and unlocking functions of an electronic door lock are achieved through utilizing a traditional mechanical lock body, and the motor direct-driven transmission device has the advantages that the changing and mounting are easy, the cost is low, the operation is stable, reliable, safe and convenient, the device is abrasion resistant, the noise is low, and the service life is long, integrates convenience of an intelligent lock and safety and reliability of a mechanical lock, and has wide application prospect in the field of intelligent door locks.

A flight lock actuator that can be powered by two sources of stored energy when aircraft power has been switched off. A mechanical energy storage means and an electrical energy storage means provide a fully redundant energy storage system that stores sufficient energy to complete the actuator's extension stroke when aircraft power is removed. The actuator has a motor control system that limits the stroke velocity for both the extension and retraction strokes, including a damper feature capable of effectively braking the actuator during the back-driven extension stroke.

A fastening arrangement for a gas tank (1) of a motor vehicle comprises: at least one gas tank for storing gaseous fuel; a valve, which is arranged on a section of the gas tank (1) which is provided with an opening, for filling and emptying the gas tank with gaseous fuel, which valve comprises a valve body (7) having control elements for controlling the valve function and connecting pieces for connecting to gaseous fuel lines; and a protective element, which is arranged on that side of the valve body (7) which faces away from the gas tank and at least partially covers the valve body (7), for protecting the valve body (7) from a mechanical introduction of force; a bracket for fastening the gas tank (1) to the vehicle and comprising a vehicle fastening section which is fastened on the vehicle and a tank fastening section which is fastened on the gas tank, wherein the support element serves as a tank fastening section for fastening the gas tank to the vehicle.

The invention relates to an electric variable pitch control system. The system is provided with a fan controller, a variable pitch controller, a blade drive controller, a blade and a nut, wherein the variable pitch controller is used for receiving a blade angle signal and a blade speed signal which are transmitted by the fan controller and combining the signals into a single speed signal; the nutis positioned on the blade; a pressure sensor for acquiring a pressure signal is arranged on the nut; and the blade drive controller is used for controlling the blade to change pitch through the blade speed signal which is combined by the single speed signal and the pressure signal. By the electric variable pitch control system, the stability and the reliability of a unit electric signal are enhanced, and the service life of a unit standby power supply is prolonged.

The invention discloses an automatic oscillation mixing device for sample pretreatment, and belongs to the technical field of experimental instruments. The device comprises a rack, a voice coil motor,a sliding seat, a position measurement sensor, a rocker, a sample tube clamp mechanism and a controller, wherein the voice coil motor is fixed on the rack; the voice coil motor is vertically connected with the sliding seat; the position measurement sensor is arranged on the sliding seat, the rocker is pivoted on the rack, the sliding seat is rotatably connected with the head end of the rocker, ashort arm is arranged from the head end of the rocker to the pivoted part, a sliding gap parallel to the short arm is reserved at the rotary joint, the sample tube clamp mechanism is fixed at the tailend of the rocker, and a long arm is arranged from the tail end of the rocker to the pivoted part; and the controller is connected with the voice coil motor and the position measurement sensor. The scheme has the characteristics of artificial oscillation simulation and dynamic adjustment, can realize electronic buffering, reduces mechanical impact at the tail end of a reciprocating motion stroke,improves an up-down reciprocating oscillation stroke and output force, reduces noise generation, and is light in overall structure.

The invention relates to a water heater with a flexible inner container. The water heater comprises an inner container, a thermal insulation layer, a heating pipe, a water inlet pipe and a water outlet pipe, the thermal insulation layer is arranged outside the inner container, the heating pipe is arranged in the inner container, the water inlet pipe and the water outlet pipe are communicated with the inside of the inner container, the inner container is the flexible inner container made of flexible materials, and a rigid support is arranged between the flexible inner container and the thermal insulation layer. Internal water capacity of the inner container is increased along with increasing of the temperature of the heating pipe as the inner container of the water heater is made of the flexible materials, cold water heating volume is expanded continuously, overall dimensions of the inner container are changed correspondingly, volume is increased, pressure of the inner container is guaranteed to be maintained constant, mechanical force impact on an external steel structure shell is reduced, further service life of the inner container is prolonged, and electrical safety performance of the water heater is guaranteed.

The invention discloses a transmission device with a stepless speed regulating function. The transmission device is characterized by comprising a roller, a power input shaft and a roller end shaft, wherein the outer end of the power input shaft is located on one side of the roller, the inner end of the power input shaft stretches into an inner cavity of the roller until being close to the other side of the roller, the power input shaft is arranged on a roller first end cover through an end cover bearing and a seal ring, the roller first end cover is fixed to one side of the roller, the roller end shaft is fixed to the other side of the roller through a roller second end cover, and the roller end shaft and the roller second end cover are of an integrated structure or a rigid seal connection structure; an adhesive speed regulating clutch is arranged between the inner end of the power input shaft and the inner roller wall of the roller. According to the transmission device, the adhesive speed regulating clutch and the roller are scientifically and reasonably integrated, the structure is more compact, the effect of a common roller is achieved, and the functions of belt conveyor slow starting and stepless speed regulating are achieved.