5results about How to "Reduce backlash" patented technology

A hidden drainage ditch system of a building curtain wall comprises a drainage ditch, a cover plate is installed on the drainage ditch, a water inlet is further formed in the upper portion of the drainage ditch, and the hidden drainage ditch system further comprises a filtering assembly arranged at the water inlet. The filtering assembly further comprises a primary filtering piece and a secondary filtering piece; the primary filter part comprises a barrier plate mounted at the water inlet, and a drainage gap for water flow to pass through is formed between the barrier plate and the water inlet; the secondary filtering piece comprises a filtering plate and a plurality of leakage holes formed in the filtering plate. According to the utility model, the blockage problem of the drainage ditch can be further relieved, and the maintenance intensity of the drainage system can be effectively reduced, so that the reliability and stability of the drainage system are enhanced.

The application provides an air inlet grille and a vehicle. The air inlet grille comprises a frame assembly and a blade. The frame assembly comprises a mounting space. The blade extends in a first direction and is rotatably arranged in the mounting space. The frame assembly further comprises a blocking piece. In the first direction, the blocking piece is arranged at an end surface of at least one end of the blade. The blocking piece is used to abut against the end surface of the blade to limit movement of the blade towards the side close to the blocking piece through elastic deformation. The air inlet grille of the application can reduce abnormal sound caused by collision between the blade and the frame assembly.

A torque control system for a drive system of an electric vehicle includes: a controller generating a front wheel torque command and a rear wheel torque command having a torque value distributed from a required torque for driving of the vehicle according to a torque distribution mode selected among a plurality of torque distribution modes based on vehicle driving information; and the front-wheel motor and the rear-wheel motor are controlled according to the torque command output by the controller. The controller determines whether switching between the plurality of torque distribution modes occurs; calculating a torque correction amount for reducing a backlash shock based on a backlash estimation value in the drive system of a zero-crossing torque command among the front wheel torque command and the rear wheel torque command during mode switching; and performing torque correction on another torque command that does not cross zero using the calculated torque correction amount.

This invention discloses a cutting control system for a stainless steel pipe manufacturing production line. This invention relates to the field of stainless steel pipe cutting technology and solves the technical problems of delayed and crude anomaly identification and lack of stability monitoring under normal conditions. The invention collects manufacturing requirement parameters through a cutting parameter analysis module and automatically calls preset matching parameter combinations from the database to complete initial calibration. This method not only eliminates parameter deviations caused by experience differences, shortens initialization time, and improves parameter matching, but also increases the initial accuracy compliance rate of kerf width, kerf diameter, etc. It collects actual operating parameters at high frequency, compares them with the allowable error range, and generates anomaly adjustment signals in real time, shortening the anomaly detection time and reducing the defect rate. It calculates the standard deviation of fluctuations for parameter differences under normal operating conditions, triggers instability warnings based on fluctuation thresholds, and handles warnings in three levels according to the number of warnings, reducing the incidence of sudden anomalies.

The application relates to the field of vehicle transmission technology and discloses a non-integer multiple magnetic pole proportion and wedge-shaped magnet magnetic force circulating hub system which comprises a bearing seat, a hub assembly, a wheel rim assembly, a first bearing group and a second bearing group. The bearing seat is fixedly connected with a vehicle suspension or a steering knuckle. The hub assembly is rotationally connected between the first bearing group and the bearing seat, the wheel rim assembly is rotationally connected between the second bearing group and the bearing seat, and the wheel rim assembly is coaxially arranged with the hub assembly. A first permanent magnet array is arranged on the hub assembly, and a second permanent magnet array is arranged on the wheel rim assembly. The first permanent magnet array and the second permanent magnet array are arranged between the hub assembly and the wheel rim assembly to form a magnetic field coupling, non-contact power transmission is realized, contact wear and lubrication dependence in traditional mechanical transmission are avoided, transmission efficiency is improved, and the service life of the system is prolonged.