3results about How to "Increase push force" patented technology

The utility model relates to the technical field of catheters, and discloses a catheter with smoothly and gradually changed hardness, which comprises a base tube, the base tube comprises a catheter body I, a catheter body II and a connecting sleeve, the catheter body II is arranged at one side end of the catheter body through the connecting sleeve, and the catheter body I comprises a base tube, a lining I, a reinforcing wire I and a sheath I; the first lining is mounted on the outer wall of the base tube, the first reinforcing wire is mounted on the outer wall of the base tube, the first sheath is mounted on the outer wall of the first reinforcing wire, the second catheter body comprises a base tube, a second lining, a second reinforcing wire and a second sheath, the second lining is mounted on the outer wall of the base tube, the second reinforcing wire is mounted on the outer wall of the base tube, and the second sheath is mounted on the outer wall of the second reinforcing wire. According to the catheter with the hardness gradually changed smoothly, the first catheter body and the second catheter body with the hardness gradually reduced are arranged, so that the catheter bodies are not prone to bending or radial deformation in the using process, and the catheter can pass through tortuous blood vessels without damaging biological lumens.

The utility model relates to a round self-puncturing pressing rivet nut for a thin plate, which belongs to the technical field of nuts and comprises a spline tooth structure, a circular ring structure, a rivet ring and a nut body. The annular structure, the flower tooth structure and the riveting ring are sequentially installed on the end face of the nut body from outside to inside. The flower tooth structure comprises arc-shaped flower teeth; the arc-shaped teeth are evenly arranged on the front face of the nut body in a surrounding mode on the inner side of the annular structure. The outer side face of the rivet ring and the nut body form a conical angle. The height of the annular structure is higher than that of the spline tooth structure and lower than that of the rivet ring; the nut body is provided with a center hole used for being connected with a bolt. The press riveting device is suitable for press riveting of thin plates, does not need pre-trepanning, and is good in riveting performance, high in connection strength, high in mechanical performance and small in installation space limitation.

The utility model relates to an agricultural machine, namely a pepper flat sieve sorting machine, including a feeding port (1), a smashing bin (2), a sieve (3), its characterized in that: the sieve (3) is the rectangular groove surrounded by the frame, and the multiple roller shafts (8) are evenly distributed in the groove along the plane, and the sieve gap (9) that can sieve and drop the pepper fruits is between the adjacent roller shafts, the flat conveying belt (4) is installed on the frame (6) below the sieve, and when working, the pepper leaks from the sieve gap to the flat conveying belt, and then is sent out by the flat conveying belt. Advantageous effects are: the pepper fruits fall from the sieve gap, the stems are left above the sieve surface, the smashing of the stems is limited to the separation of the pepper from the stems, the smashing requirement is lower, and the fruit intact rate is greatly improved. The sieve is a plane sieve, occupies small space, has simple structure, and the sieve gap is convenient to adjust. Each roller shaft rotates in the same direction, and the pushing force for the material is great, and will not be blocked. It is expected to become the main machine for pepper screening.