3results about How to "Reduce driving noise" patented technology

The application discloses an engineering tire pattern structure with equal groove width, variable pitch, low noise and full wear period, and the like, and relates to the technical field of tires. The application breaks through the technical bottleneck of single performance, inconsistent performance of each pitch, uneven wear, poor structural reliability and low universality in the design of a traditional engineering tire variable pitch, and through integrated innovative design of equal groove width basic design+density differentiation matrix solid convex point+three-order universal pitch proportion, the application realizes the coordinated consideration of low noise, performance consistency, uniform wear and structural reliability, and is suitable for the use requirements of engineering tires in heavy load and multiple working conditions in all directions.

This invention relates to the field of bridge technology, specifically disclosing a seamless expansion joint grooving device for bridges, comprising a grooving base, a spring assembly, grooving pads, an anchoring slide, and a pre-embedded steel plate. The upper surface of the strip-shaped grooving base has a strip-shaped arc-shaped groove. The spring assembly is a strip-shaped arc-shaped structure formed by connecting several parallel arc-shaped spring segments end-to-end, placed within the arc-shaped groove along its length. Two grooving pads are symmetrically arranged on either side of the spring assembly. The upper end of each grooving pad abuts against the lower surface of a stop block in the upper opening of the arc-shaped groove. The lower end of the anchoring slide has a sphere, which supports the spring assembly. The upper end of the anchoring slide is connected to the pre-embedded steel plate. This seamless expansion joint grooving device not only effectively limits the vertical displacement of the elastic expansion joint in the seamless expansion joint, preventing it from arching above the road surface, but also facilitates subsequent maintenance.

The utility model discloses a seamless bio-based composite elastomer expansion device. A framework assembly comprises a pair of edge beams supported by a plurality of anchor plates arranged on the outer side face of the framework assembly; the pair of cross-seam curve plates are transversely arranged on the inner side surfaces of the edge beams in a staggered manner; the spring stabilizer is composed of an inner shaft which is arranged in the sleeve and abuts against the spring. The spring stabilizer is transversely arranged between the edge beams and is propped against the edge beams; and the elastic filler is filled in a U-shaped cavity formed by the edge beam and the cross-seam curve plate. F-shaped steel is adopted as the boundary beam, a pouring space is provided for the elastic filler, and the structural performance is safer and more reliable; and meanwhile, the spring stabilizer is supported. The spring stabilizer avoids vertical instability of the edge beam when the spring stabilizer is pressed, and restrains vertical deformation of the elastic filler; the adopted elastic filler is a bio-based composite elastomer material, the raw materials are green and environment-friendly, and the material cost is greatly reduced under the condition that the performance is not influenced by adding the bio-based material. And the elastic filler is used as the joint crossing surface, so that the bearing capacity is enhanced, the driving smoothness is improved, and the driving noise is reduced.