2results about How to "Constant friction" patented technology

The utility model relates to the field of slab feeding machines, in particular to an automatic slab feeding machine suitable for conveying stone slabs through a belt. The plate feeding machine comprises a plate feeding machine body, a lifting mechanism is arranged on the side, close to a belt, of the bottom of the plate feeding machine body, and the lifting mechanism lifts the single side of the plate feeding machine body. The single-side lifting mechanism is arranged at the bottom of the plate feeding machine, on the premise that the accurate plate feeding position of the plate feeding machine is guaranteed, the height difference is formed between the plate feeding position and the belt, and plates rising in the inclined direction are lowered to the original horizontal position to be in lap joint with the belt after running to a certain position; the friction force between the plate and the belt is ensured to be large enough, and sliding between the plate and the belt is not caused, so that the distance between the adjacent plates on the belt is relatively unchanged, the requirement of simultaneous working of multiple stations and multiple procedures on the belt is met, and the subsequent machining precision is improved.

The technical scheme of the utility model discloses a large-deformation geotechnical sample tensile test device which is characterized in that the large-deformation geotechnical sample tensile test device comprises a vertical stand column which is vertically arranged and a pair of clamping assemblies which are connected to the vertical stand column, clamping heads are arranged at the tail ends of the clamping assemblies, and each clamping head comprises a first base which is connected with the corresponding clamping assembly; the first high-strength magnet is arranged in the first base; a second base; the second high-strength magnet is arranged in the second base and is magnetically connected with the first high-strength magnet, and the geotechnical sample is clamped between the first high-strength magnet and the second high-strength magnet. According to the tensile testing device for the large-deformation geotechnical test sample, the test sample is clamped by adopting magnetic force, the two high-strength magnets clamp the test sample in the test sample testing process, the clamping force is about 5-8N, and the clamping force is kept variable in the tensile process, so that the stress area of the test sample and the chuck is not changed, the friction force is not changed, slipping is avoided, and the clamping is reliable; in the sample stretching process, the clamping part of the chuck is constant, the chuck does not slide, and the test is more accurate.