44results about How to "Eliminate impact noise" patented technology

An oven door opening and closing device includes at least one hinge connectable to an oven door and to an oven housing for realizing a predetermined pivoting opening and closing movement of the oven door relative to the oven housing between an open and a closed position. At least one closing force generating device generates a predetermined closing force, and a kinematic device is coupled to the hinge and to a moveable element in such a manner that the predetermined pivoting opening and closing movement of the hinge is converted into a predetermined reciprocating opening and closing movement of the moveable element. At least one damping system has a damper for generating a damping force which counteracts the closing movement of the movable element within a predetermined section, which corresponds to a predetermined angle section of the pivoting closing movement of the hinge shortly prior to the closed position.

The invention relates to a spin-orbit type reciprocating piston compressor, belonging to the technical field of compressors. According to the spin-orbit type reciprocating piston compressor, a conical thrust pin or a rolling body is in contact and matched with a spin-orbit surface of a rotor, and therefore a speed difference at the contact part between the conical thrust pin or rolling body and the spin-orbit surface of the rotor can be reduced or even eliminated, and a slippage phenomenon between the thrust pin or rolling body and the spin-orbit surface of the rotor can be eased, thus reduction of part abrasion and frictional noise caused by slippage can be facilitated; because a cooling fan is used for directly cooling a cylinder cover of the compressor, whole unit temperature of the compressor can be reduced, temperature rise of lubricating oil is further reduced and lubricating performance of the lubricating oil is increased, and therefore reduction abrasion and frictional noise is facilitated as well; and because a release link mechanism is adopted and an interval eliminating spring is arranged on the release link at the same time, the release link can be well close to a sliding block under the action of the interval eliminating spring, and the sliding block enables the thrust pin or rolling body or the spin-orbit surface of the rotor to be well contact and matched, and therefore various intervals among parts are effectively eliminated, and reduction of impact noise and impact abrasion of parts can be facilitated.

The invention discloses a flexible clearance eliminating gear with rigidity easy to control. The gear comprises a first malposed gear and a second malposed gear which are jointly connected in the axial direction of a transmission shaft, wherein a shaft sleeve is also connected among the first malposed gear, the second malposed gear and the transmission shaft; key grooves are paired in a connected position of the shaft sleeve and the first malposed gear, and a key is connected between the paired key grooves; a boss is also arranged at a connected part of the shaft sleeve and the second malposed gear, at least a paired penetrating groove is formed in corresponding positions of the boss and the second malposed gear which sleeves outside the boss in the circumference direction, and a plate spring is connected between each pair of the paired penetrating grooves in the shaft sleeve; the paired penetrating groove in the second malposed gear and the key groove in the first malposed gear are relatively malposed in the circumference direction. For the gear disclosed by the invention, a connection structure of the flexible clearance eliminating gear is simplified, the problem that the normal contact pressure of a meshed tooth side of a gear pair is hard to be ensured effectively is solved, a clearance in the tooth side is flexibly eliminated, and the impact noise of the gear is eliminated.

The invention provides a continuous serving device for high-level sports badminton training, which relates to the technical field of sports equipment, and solves the problem that the continuous serving can not be achieved through structural improvement while realizing the airflow heat dissipation of the sliding rod and the airflow of the driving motor Type heat dissipation; the problem of automatic irregular adjustment of the serve can be realized through structural improvement. A continuous ball serving device for high-level sports badminton training, comprising a base; four fixing seats are installed on the base, and a mounting plate is also installed on the base. Because the tail end of the elastic member A is welded on the top surface of the base, and the head end of the elastic member A is welded to the bottom surface of the mounting plate, and the elastic member A forms a non-directional serving structure of the serving structure, so that the gear row and the protective pad When impacting, the serving structure will continuously swing under the action of the elastic member A, and then the badminton sent at this time can reflect randomness.