55results about How to "Improve recovery speed" patented technology

The invention mainly provides a ratchet wheel of a wheel hub of a bicycle. The ratchet wheel is arranged between a first wheel hub base and a sleeve base and comprises a blocking ring which is arranged inside the wheel bub base fixedly, a driven base, a conical surface, a blocking portion and a magnetic group; wherein an inclined cone inner hole and a blocking edge are arranged on the blocking ring, a driving base is arranged between the wheel hub base and the sleeve base, and a plurality of first ratchet teeth are arranged on a one side end face of the driving base, which faces towards an axial ring inside the wheel hub base; the driven base is arranged inside the inclined cone inner hole and corresponds to a driving group, the external diameter of the conical surface can be matched with the inclined cone inner hole, the blocking portion can be blocked by the blocking edge in one direction, a driven base ring is provided with a plurality of second ratchet teeth which can be meshed with the first ratchet teeth, and the magnetic group is arranged between the driven base and the wheel hub base and provided with a first magnetic part and a second magnetic part, which are respectively arranged inside the wheel hub base and on the driven base and are in a mutual exclusion state. Thus, the inclined cone inner hole which is in an inclined cone shape and the conical surface design are adopted, the friction force is reduced, the restoring speed of the driven base is increased, and the sensitivity of a ratchet wheel group is improved further.

The invention discloses a hydraulic tensioner reset device for preventing jamming and deformation and an implementation method thereof. A threaded rod is connected between the inner walls of the opposite sides through bearing rotation, and the outer wall of the threaded rod is threaded with a threaded block, and a sliding connection is formed between the threaded block and the rectangular groove, and a reset plate is fixed on one side of the threaded block. A support seat is fixed on one side of the top outer wall, and a support groove is opened on the top outer wall of the support seat, and a clamping mechanism is arranged inside the support groove. The invention prevents the hydraulic tensioner from falling down due to the large force of pressurization when the hydraulic tensioner returns, thereby affecting the return of the hydraulic tensioner, and prevents the hydraulic tensioner from being pressurized due to jamming. When the hydraulic tensioner is damaged due to the large force, it is convenient to improve the return speed of the hydraulic tensioner.

The invention discloses an oblique ore body upward incision trough broaching detonation method. During upward incision construction, upward incision is conducted two times; a shallow hole drill jambo is used for utilizing the oblique cut for conducting drilling and blasting tunneling on the accurate mining high upper, the compensation space and the free face of secondary blasting are increased, and the oblique length of the upward incision is reduced; and then a medium-deep hole drill jambo is used for utilizing the cylinder cut to conduct one-time throughout detonation on cutting. By means of the oblique ore body upward incision trough broaching detonation method, the oblique ore body upward incision can form the upward incision through one-time shallow hole drilling and blasting and one-time medium-deep hole drilling and blasting, safety risks in the multi-time shallow hole trough broaching operation process of a traditional method are effectively reduced, the problem that in the oblique ore body trough broaching process, a trolley, an excavator and other devices cannot directly work on net anchoring, rock drilling and scraping operation without bottom rising due to the large ore body gradient is solved, and the purposes of increasing the mining speed, improving the ore quality and reducing the safety risks are achieved.