51results about How to "Reduce the noise decibel" patented technology

A radiation module capable of resisting reverse flow of hot fluid includes a fan, a radiator and a retaining tool. The fan provides an inlet and an outlet. The radiator is connected to the outlet of the fan. The retaining tool secures the radiator to a heat generation part. At least a baffle is provided in the radiation module. The fluid enters the fan via the inlet and flows toward the radiator via the outlet to cool the heat-generating component and the hot fluid moving outward the radiator is resisted entering the inlet with the baffle part so as to enhance heat dissipation efficiency.

A brushless direct current motor comprises a casing (1), a front end cover (4), a rear end cover (5), a motor shaft (10), a rotor (11), permanent magnets (12), and stators (13). The motor shaft (10) is sleeved and connected in the casing (1). Two ends of the motor shaft (10) sleeve and are connected to the axes of the front end cover (4) and the rear end cover (5) through bearings (17) respectively. The front end cover (4) and the rear end cover (5) each have an inner side provided with a hollow extension portion. The hollow extension portions sleeve the motor shaft (10). A stator (13) sleeves and is connected to an outer wall of each hollow extension portion. Outer sides of two stators (13) are provided with the rotor (11). The rotor (11) between the two stators (13) is connected to the motor shaft (10). An inner wall of the rotor (11) is provided with the permanent magnets (12) opposite to the stators (13). The permanent magnets (12) opposite to the two stators (13) are disposed in a staggered manner.

The invention discloses a working-condition self-adaptive lifting and falling-prevention device of a scaffold. The working-condition self-adaptive lifting and falling-prevention device of the scaffold comprises a scaffold lifting mechanism, a lever type linkage mechanism and a falling-prevention mechanism, wherein the scaffold lifting mechanism, the linkage mechanism and the falling-prevention mechanism are arranged on a frame, a bolt hole which is connected with a scaffold frame is formed on the lower portion of the frame, the scaffold lifting mechanism is connected with the falling-prevention mechanism through the linkage mechanism, and the upper portion of the linkage mechanism is connected with an outer wall. The working-condition self-adaptive lifting and falling-prevention device of the scaffold has the advantages of well achieving purposes of normal lifting and falling-prevention due to the fact that an integrated drive system is formed by achieving the normal lifting function through the scaffold lifting mechanism, achieving real-time monitoring and transmission to a lifting state through the linkage mechanism and achieving the emergency-brake handling to sudden accidents through the falling-prevention mechanism; being skillful in design, convenient to install, safe and reliable, particularly suitable for the scaffold in the high-rise building construction and good in popularization and use value.

A magnetic damping exercise bicycle, comprising a bicycle base, a vehicle frame, a handlebar, a shock-absorbing vehicle seat, a driving pulley, two protective pedals and a magnetic damping device, the bicycle base is fixedly arranged on the ground, and the vehicle frame is installed on the bicycle On the base, the handlebar height adjuster is installed on the upper front side of the frame, the handlebar is installed on the top of the handlebar height adjuster through the handlebar buffer device, and the shock-absorbing seat is installed on the rear side of the frame through the seat height adjuster In the upper part, the driving pulley is rotatably installed on the lower part of the rear side of the frame. Two protective pedals are respectively arranged on the left and right sides of the driving pulley and are respectively connected to the left and right ends of the central shaft of the driving pulley. The magnetic damping device is fixed and installed. At the lower front side of the vehicle frame, the driving pulley is connected to the magnetic damping device through a synchronous belt. The invention adopts magnetic damping instead of traditional frictional damping, greatly reduces noise decibels, simplifies the transmission system, reduces floor space, makes riding more comfortable, has various functions and is good in fun.

The invention provides rust removing equipment for machining. The rust removing equipment comprises a master control switch and a power plug. Four supporting columns are mounted on the outer wall of arust removing inner cylinder, and a feeding hole is formed in the top of the left side end face of the rust removing inner cylinder and communicates with the bottom of a feeding funnel; a discharginghole is formed in the bottom of the right side end face of the rust removing inner cylinder, a gate plate is mounted at the discharging hole, and one end of the gate plate is slidablyconnected with the interior of the rust removing inner cylinder; and a rust leaking hole is formed in the bottom of the rust removing inner cylinder and located in the top of a rust residue collecting drawer. Grinding balls and the outer walls of mechanical parts makes mutual friction advantageouslythrough rotating of a rust removing rotating cylinder, and rust contained in the exteriors of the mechanical parts is removed, so that the exteriors of the mechanical parts are smoother and cleaner, and the mechanical parts can conveniently assembled and used by people; the rust removing rotating cylinder is arranged obliquely so thatpeople can discharge the mechanical parts convenientlythrough rotating of the rust removing rotating cylinder, physical labor of people is reduced, and the working efficiency is promoted.