3results about How to "Eliminate play" patented technology

The utility model relates to a bearing protection device of mechanical grading mill, including frame, two main motors are installed to both sides of frame, the output of two main motors installs grading wheel drive, grinding disc drive respectively, grinding disc drive and grading wheel drive connect hollow shaft and solid axle through V type belt respectively, solid axle is placed in hollow axle hole, grinding disc is installed on hollow axle, and is inside the cavity of grinding cavity, grading wheel is installed on solid axle, and is above grinding disc inside the cavity, the upper and lower end of hollow axle is provided with big bearing respectively, and is supported by big bearing, the upper and lower end of solid axle is provided with small bearing respectively, and is supported by small bearing, the outer ring of grinding disc is provided with toothed grinding ring, the cavity of grinding cavity is provided with air guide ring below, and air guide ring is below toothed grinding ring, compared with prior art, the utility model can improve the service life of bearing, reduce the wear and tear and failure risk of bearing, and further improve the effect of equipment grinding and grading.

This utility model provides a positioning fixture for laser welding of automotive crash barrier tubes, relating to the field of fixture technology. The positioning fixture for laser welding of automotive crash barrier tubes includes: a base for supporting the automotive crash barrier tube; end face clamping mechanisms, one at each end of the base, for clamping the ends of the automotive crash barrier tube; multiple side clamping mechanisms, multiple on the base, for clamping the front and rear sides of the automotive crash barrier tube; and multiple adjustable pressing mechanisms, multiple on the base, each including a pressure plate for pressing the upper surface of the automotive crash barrier tube, and the pressure plate can adjust its angle according to the inclination of the upper surface of the automotive crash barrier tube. This application achieves full-circumferential positioning through the coordinated use of the end face clamping mechanism and the side clamping mechanism, eliminating movement during the welding process. The adaptive design of the pressure plate is compatible with crash barrier tubes with different cross-sectional inclination angles, achieving uniform distribution of clamping force, avoiding deformation caused by local stress concentration, and improving the accuracy of the laser welding trajectory.

The invention belongs to the technical field of copper bar processing, and discloses multi-station continuous punch forming equipment for special-shaped copper strips, which comprises a main frame and a workbench mounted at the bottom end of the main frame, a main cylinder is mounted at the top of the main frame, and the output end of the main cylinder is connected with a top lifting frame. According to the invention, the passive guide die holder is forcibly driven to clamp inwards through physical extrusion, the structure directly converts the power of'die descending 'into the power of'lateral clamping', and ensures that the clamping force reaches the maximum value only at the moment that a punching head is about to contact with a workpiece, so that an independent clamping power source is omitted, the equipment structure is simplified, and the production cost is reduced. And the sequential logic of first clamping and second punching is guaranteed from the mechanical principle, the problem of copper strip movement caused by desynchrony is thoroughly solved, and therefore the position precision of special-shaped copper strip punching is effectively guaranteed, and the special-shaped copper strip punching device is particularly suitable for the flexible production requirements of multiple varieties and small batches.