8 results about "Curve shape" patented technology

The application discloses a constant engagement characteristic pair-constructing external engagement cylindrical gear pair, and relates to the technical field of gear transmission, comprising a pair-constructing cylindrical gear I and a pair-constructing cylindrical gear II based on conjugate curves. The normal tooth profile curves of the pair-constructing cylindrical gear I and the pair-constructing cylindrical gear II are continuous combination curves with the same curve shape, facilitating machining with the same cutter; the common normal line at the inflection point or the tangent point of the continuous combination curve passes through the node of the gear pair, and the inflection point or the tangent point position can be adjusted according to actual requirements to adjust the sliding rate of the gear pair; the coincidence degree is designed as an integer, and the engagement stiffness can be kept constant, thereby greatly improving the dynamic engagement performance of the gear pair. In the application, the normal tooth profile of the pair-constructing cylindrical gear I and the pair-constructing cylindrical gear II is the same, the engagement point curvature radius is constant and tends to infinity, the sliding rate is constant, and the engagement stiffness is constant, and the application has the technical characteristics of low manufacturing cost, high bearing capacity, high transmission efficiency, low vibration and noise and the like.

This invention discloses an adaptive positioning and clamping device and method for hyperbolic panels. By integrating four basic degrees of freedom of motion—horizontal lateral movement, vertical lifting, horizontal rotation, and vertical pitch—it constructs a complete spatial posture adjustment capability. This enables precise arrival at the spatial coordinates of any preset point on a complex curved surface and adaptive adjustment to a final posture aligned with the surface normal at that point. This solves the problem of conformal clamping caused by continuous changes in the edge position and angle of hyperbolic panels. Through the coordinated operation of these four degrees of freedom, it achieves complete following and dynamic matching of the panel edge curve shape, accurately responding to changes in curvature distribution, and ensuring stable clamping with adaptive posture at any contour position. This breaks through the structural limitations of traditional fixed or limited adjustment clamping methods, providing a highly adaptable and high-precision positioning and clamping solution for the molding of aerospace composite material components with continuously variable curvature characteristics.

The application discloses a constant engagement characteristic pair-gear-rack pair, and relates to the technical field of gear transmission, comprising a pair-gear rack based on conjugate curves and a pair-gear cylindrical gear. In the application, the normal tooth profile curve of the pair-gear cylindrical gear and the pair-gear rack is a continuous combination curve with the same curve shape, which is convenient for processing with the same cutter; the common normal line at the inflection point or the tangent point of the continuous combination curve passes through the node of the gear rack pair, and the inflection point or the tangent point position can be adjusted according to requirements to adjust the sliding rate of the gear rack pair; the pair-gear rack pair can be designed in a symmetrical form along the tooth width, and the overlap degree is designed as an integer, so that the engagement force action line and the engagement stiffness are constant. In the application, the normal tooth profile of the pair-gear rack and the pair-gear cylindrical gear is the same, the curvature radius of the engagement point is constant and tends to infinity, the sliding rate is constant, the engagement stiffness is constant, and the direction of the engagement force action line is constant, and the application has the technical characteristics of low manufacturing cost, high bearing capacity, high transmission efficiency and low vibration and noise.

This invention relates to the field of fluid machinery lubrication and friction reduction technology, specifically to a shield-shaped textured structure on the surface of a water-lubricated silicon carbide bearing based on biomimetic texture. It includes a SiC workpiece and multiple sets of biomimetic textures on the surface of the SiC workpiece. The biomimetic texture, viewed from above, is a shield-shaped curved concave surface. The bottom shape of the biomimetic texture consists of a descending uniformly accelerated convex curve and a vertical line. The shield-shaped texture can generate a significant dynamic pressure effect. The uniformly accelerated convex curve shape at the bottom can generate a constant external force, ensuring that the fluid has sufficient stable kinetic energy. Furthermore, the uniformly accelerated convex curve texture area has a larger proportion of high-pressure area. The presence of the convergence zone at the tip where the fluid converges at the texture outlet and the bottom of the convex curve enhances the fluid's inertial effect, forming a significant "ball effect" vortex, improving the load-bearing capacity of the friction pair surface, reducing the shear force on the friction pair surface, and achieving the purpose of lubrication and friction reduction.

An absorbent article (1) is provided with a disposal belt (10) for maintaining a disposal form, which is arranged on an outer surface (5A) of an article main body portion (1A). A fixing portion (12) of the disposal belt (10), which is fixed to the outer surface of the article main body portion, an elongation portion (15), and a fixed portion (18) are arranged in a length direction (X1) of the disposal belt and are arranged in a folded state on the outer surface (5A). The elongation portion (15) is capable of being stretched and contracted in the length direction after the folded state is released. An adhesive surface (20) is formed on a main body opposite surface (19b) of the fixed portion (18), which faces the article main body portion in a state in which the folded state is released. The elongation portion is configured to generate a curved portion (22) by contracting after being stretched in the length direction. A cross-sectional shape of the curved portion (22) in a width direction (Y1) orthogonal to the length direction has a curved shape in which a side (u) opposite the main body opposite surface is convex.

1. Name of the product in this design: Seam Filler Pillow (Inner Curve Shape). 2. Purpose of this design: To fill the gap between the mattress and the headboard. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The application discloses a constant engagement characteristic pair-constructive internal engagement cylindrical gear pair and relates to the technical field of gear transmission, comprising a pair-constructive external cylindrical gear and a pair-constructive internal cylindrical gear based on conjugate curves. In the application, the normal tooth profile curves of the pair-constructive external cylindrical gear and the pair-constructive internal cylindrical gear are continuous combination curves with the same curve shape, facilitating machining with the same cutter; the common normal line at the inflection point or the tangent point of the continuous combination curve passes through the node of the gear pair, and the sliding ratio of the gear pair can be adjusted according to the requirement by adjusting the position of the inflection point or the tangent point; the coincidence degree is designed as an integer, and the constant engagement stiffness can be realized, thereby greatly improving the dynamic engagement performance of the gear pair. In the application, the normal tooth profile of the pair-constructive external cylindrical gear and the pair-constructive internal cylindrical gear is the same, the curvature radius of the engagement point is constant and tends to infinity, the sliding ratio is constant, and the engagement stiffness is constant, and the application has the technical characteristics of low manufacturing cost, high bearing capacity, high transmission efficiency, low vibration and noise and the like.

The application discloses a constant engagement characteristic pair of double helical gears, and relates to the technical field of gear transmission, comprising a pair of double helical gears I and a pair of double helical gears II based on conjugate curves. In the application, the normal tooth profile curve of the pair of double helical gears is a continuous combination curve with the same curve shape, which is convenient for machining with the same cutter; the common normal line at the inflection point or the tangent point of the continuous combination curve passes through the node of the gear pair, and the inflection point or the tangent point position can be adjusted according to actual requirements to adjust the sliding rate of the gear pair; the overlapping degree of the pair of double helical gears is designed as an integer, and the engagement force action line and the engagement stiffness are constant. In the application, the normal tooth profile of the pair of double helical gears I and the pair of double helical gears II is the same, the curvature radius of the engagement point is constant and tends to infinity, the sliding rate is constant, the engagement stiffness is constant, and the direction of the engagement force action line is constant, and the application has the technical characteristics of low manufacturing cost, high bearing capacity, high transmission efficiency and low vibration and noise.