5results about How to "Eliminate tolerance" patented technology

The present invention provides a power system for a rolling curtain device, including a one-way resistance module, the one-way resistance module including a resistance module housing, a rotating shaft, a one-way transmission assembly, a mounting seat and a resistance member, the resistance member is used to provide a rotational resistance between the resistance module housing and the mounting seat; the one-way transmission assembly is installed between the mounting seat and the rotating shaft, so that the mounting seat rotates unidirectionally relative to the rotating shaft, thereby providing a one-way resistance when the curtain body is released from the rolling tube. The resistance can make up for the tolerance between the deadweight of the curtain body and the total resilience of the power coil spring module, so that the curtain body can stably stay at the required height, and can improve the hand feel of the cordless rolling curtain device when it is pulled down; the curtain body can be smoothly retracted, which improves the smoothness of the curtain body retraction of the cordless rolling curtain device.

The utility model discloses a twist needle rolling machining device, and belongs to the technical field of twist needle machining. The problem that an existing twist needle size correction method is low in efficiency is solved. The machining device specifically comprises a machining platform, a machining sliding block and a pushing mechanism. A machining sliding block is arranged on the machining platform, and one end of the machining sliding block is connected with a pushing mechanism. A twist needle is placed between the machining platform and the machining sliding block, the pushing mechanism drives the machining sliding block to move along the machining platform, and the machining platform drives the twist needle to roll in the moving process. According to the utility model, the pushing mechanism drives the processing slide block to move, the processing slide block pushes the twist needle on the processing platform to roll during movement, and compresses the twist needle during rolling, so that possible bumps at local positions of the twist needle are eliminated, and the twist needle meets the size requirement; the machining speed is high, the twist needle can meet the size requirement by moving the machining sliding block back and forth once, and the working efficiency is high.

The invention relates to a target (110) for a shaft of a motor vehicle (1), said target (110) being configured to be mounted on a free end of said shaft and comprising: at least one metal tooth (112); a body (114) supporting the at least one metal tooth (112); and a securing element (116) comprising an insertion portion (116A) configured to be at least partially inserted on an end of the shaft, the body (114) being overmolded at least partially around the at least one tooth (112).

This invention belongs to the field of flowmeter technology and discloses a method for optimizing the impeller of a turbine flowmeter. The method includes: S1: collecting data on the physical properties, operating range, and performance indicators of the medium through a system to establish clear design constraint data; S2: integrating streamlined and multi-lead design concepts, and determining the blade structural parameters through mathematical modeling and simulation analysis; S3: ensuring precise matching between the processing process and design objectives through parameter modeling, accuracy threshold setting, process coordination, and data linkage; S4: manufacturing an impeller prototype based on the processing technology, and calibrating the blade size and angle parameters using equipment; S5: verifying linearity and starting flow rate indicators through data acquisition and analysis, and iteratively optimizing design and processing parameters; S6: establishing a large-scale batch production process based on the optimized final parameters. This invention solves the problems of large starting flow rate, poor linearity, and insufficient consistency of metering accuracy in turbine flowmeters under low Reynolds number conditions.

The utility model belongs to the technical field of lightning arresters, and particularly relates to a self-buckling lightning arrester which comprises a lightning arrester main body, the lightning arrester main body comprises an umbrella skirt sheath and an inner core, the inner core is installed in an inner cavity of the umbrella skirt sheath in a penetrating mode, the upper end and the lower end of the umbrella skirt sheath are provided with end covers, the two sides of the top of each end cover are provided with bolt assemblies, and the bolt assemblies are connected with the inner core through bolts. The inner core comprises fixing blocks on the left side and the right side, self-buckling insulating rods and resistor discs, clamping grooves are formed in the fixing blocks on the left side and the right side, the self-buckling insulating rods are installed in inner cavities of the clamping grooves, the self-buckling insulating rods are in an annular runway shape, and the resistor discs are installed between the fixing blocks on the left side and the right side at equal intervals; the self-buckling insulating rod covers the outer sides of the resistor discs, the aluminum block filling sheets are mounted among the resistor discs, the aluminum block filling sheets and the resistor discs are coaxially connected, the umbrella skirt sheath comprises a large sheath and a small sheath, the large sheath and the small sheath are alternately mounted, and the device is simple in structure and convenient to use.