3results about How to "Accurate center" patented technology

This invention relates to a grinding repair method for a central drive spline shaft, belonging to the field of repair technology. The invention proposes a grinding repair method for a central drive spline shaft. This method involves micro-grinding of the splines on a drive shaft with out-of-tolerance tooth direction but whose spline tooth thickness meets process requirements and has a significant remaining lifespan. This restores the technical condition of the spline teeth on the central drive spline shaft to its original process level, extends the lifespan guarantee capability of the drive shaft, and achieves cost reduction and efficiency improvement.

This invention provides a device and method for aligning the crankshaft's crank axis relative to the major axis. The bottom of the alignment block has alignment screws and alignment springs connected to both sides of a clearance groove. The alignment block is fixed to the side of the alignment rod near the bottom and facing the V-block, such that when the crankshaft is placed on the V-block and the side of the alignment rod near the alignment block is tangent to the crankshaft crank, the clearance groove of the alignment block perfectly covers the crankshaft balance block. The alignment screws and alignment springs are located on the parting surfaces on both sides of the balance block. The diameter of the reference shaft is the same as the diameter of the crankshaft crank, and the axis of the reference shaft is aligned relative to the major axis. The alignment module pre-fixes the position where the alignment rod is tangent to the crankshaft crank, and then determines the downward stroke of the alignment rod. The alignment of the crank axis relative to the major axis is achieved through the alignment rod and the alignment block, resulting in accurate and efficient alignment.

This utility model relates to the field of fabric testing technology, and in particular to a rapid tear resistance testing mechanism for rolled polyester fabric. The mechanism includes a frame on which a testing device is mounted for testing the tear resistance of the fabric. The testing device includes: a main component comprising a base plate fixed inside the frame, four circumferentially arranged grooves inside the base plate, a front slide frame slidably mounted inside the grooves, a cylindrical seat fixed in the center of the base plate, a rotating plate rotatably mounted on the lower outer wall of the cylindrical seat, connecting rods pivotally connected to the four corners of the bottom of the rotating plate, and the other end of each connecting rod pivotally connected to the bottom of the front slide frame; a driving component on the base plate for driving the rotating plate to rotate; and a clamping component mounted on the front slide frame for clamping and fixing the fabric. Synchronous radial movement achieves adaptive centering and uniform clamping of the fabric, and lever principle amplifies the clamping force, effectively preventing fabric slippage during testing and ensuring accurate and reliable test results.