225results about How to "Improve radial stiffness" patented technology

A strut top mount is optimized to provide a resilient response to jounce and rebound load rates that is symmetrical and linear over a predetermined range of travel. An annular tower is formed of the body structure. A central bracket has adhered thereto an outer resilient element that abuts the tower, and has adhered oppositely thereto an inner resilient element. A bearing is supported by the central bracket, and a spring seat is supported by the bearing. A sleeve is received by a strut shaft and adhered to the inner resilient element A lower washer abuts a lower end of the inner resilient element. An upper washer abuts an upper end of the inner resilient element. A retention washer is mounted onto the strut shaft, wherein a periphery thereof has a retention washer resilient element. The components are collectively tuned to provide the optimization.

The invention discloses a two-freedom-degree, large-travel and large-load micro-positioning platform which comprises an upper platform and a lower platform. The lower platform is provided with a base. The upper platform comprises a central movable platform. The movable platform is connected with the base through four flexible standing columns. The four flexible standing columns are distributed at four corners below the movable platform. Each flexible standing column is formed by serially connecting two flexible hook hinges. Each flexible hook hinge is formed by two coplanar circular flexible hinges in a penetration manner. Each of two adjacent movable blocks of four movable blocks is driven by a voice coil motor to move in a translation manner. The two-freedom-degree, large-travel and large-load micro-positioning platform has the advantages that the voice coil motors are used as drivers, and large-travel motion range and submicron-level resolution are provided; the movable platform and the base are connected through the flexible standing columns, and the radial rigidity of the positioning platform is quite large.

The invention discloses a double-reed large-turning angle flexible joint, relates to the technical field of mechanical kinematic pairs, and solves the problem that the conventional flexible hinge is small in motion range. The double-reed large-turning angle flexible joint is characterized in that a first shell is integrally formed by a 210-degree arc plate and a 90-degree arc plate; the side wall of the 210-degree arc plate and the side wall of the 90-degree arc plate are integrally connected, and the thickness of the 90-degree arc plate is smaller than that of the 210-degree arc plate; the 210-degree arc plate of the first shell is arranged outside a 90-degree arc plate of a second shell, the 90-degree arc plate of the first shell is arranged inside a 210-degree arc plate of the second shell, and a gap is formed between the first shell and the second shell; a first flexible plate is inserted into the first shell and the second shell through a first through groove and a second through groove; a second flexible plate is inserted into the first shell and the second shell through the remaining parts of the first through groove and the second through groove. The double-reed large-turning angle flexible joint is applied to the field of large-stroke precision transmission mechanisms and flexible transmission.

The invention discloses a spherical hinge rubber elastic element rigidity changing method, and a rubber elastic element and a manufacturing method thereof. Partial rubber materials are removed symmetrically, and different rigidity is provided through the size of the contact surface and the rubber deformation restriction degree at different stress stages to realize rigidity change. The symmetrical removal of the partial rubber materials is that: 3 to 5 circular spaces are dug on the surface of a rubber elastomer along the periphery, so that after the rubber elastomer is combined with an outer metal sleeve, the outer metal sleeve and the rubber elastomer are partially contacted under the no-load condition and are positioned in a 3-5 circular air isolation area, and spaces for the rubber to protrude at two ends are very small; meanwhile, after the rubber elastomer is combined with the outer metal sleeve, an annular gap zone is reserved between the rubber elastomer and the inner lateral surface of the outer metal sleeve. When the spherical hinge rubber elastic element is stressed, the spherical hinge rubber elastic element rigidity change is realized by changing an excircle contact surface and a lateral contact surface between the rubber elastomer and the outer metal sleeve at different stages.

The invention discloses a water-bearing rock stratum borehole wall structure and a construction method and belongs to a borehole wall structure and a construction method. The borehole wall is formed by an anchor pull rod I, an anchor pull rod II and a steel frame which are fixed on the surrounding rock, and concrete poured in a whole net frame to form a cylindrical borehole wall. The construction method comprises the following steps: manufacturing the anchor pull rod I and the anchor pull rod II on the surrounding rock body; then binding the borehole wall steel frame, connecting the anchor pull rod I and the anchor pull rod II with the steel frame, and connecting a pre-embedded grouting pipe; subsequently mounting a template and pouring the concrete; dismounting the template from the borehole wall and after the borehole wall reaches a certain strength, applying pre-tightening force to the anchor pull rod II by screwing an end nut; and finally grouting slurry via the pre-embedded grouting pipe in the anchor pull rod II, filling slurry liquid in holes in an interface between the borehole wall and the surrounding rock body through slurry transmission holes, and switching off a valve after finishing grouting the slurry. The water-bearing rock stratum borehole wall structure has the advantages that due to the fact that the borehole wall and the surrounding rock bear together, the radial stiffness of the borehole wall is improved, the accumulation of high-pressure water on the external surface of the borehole wall is avoided, and the structure has higher bearing force than that of a structure with the same section size and material, so the construction cost is greatly reduced, and the safety is improved.

A primary mirror flexible support mechanism relates to a primary mirror flexible support mechanism. The mechanism is provided to solve the problem of the existing primary mirror support mechanism, namely, the existing mechanism cannot isolate outside temperature change and has alignment error, the axial support component mechanism and the radial support mechanism interfere with each other as the pitch angle changes, and thus, the surface shape of the primary mirror is affected. The primary mirror flexible support mechanism comprises a support base, an axial support component supporting a primary mirror, a tensile component glued onto the back of the primary mirror, a radial support component glued to the center of the primary mirror, and a protective component. The radial support component comprises a flexible mandrel adhered into the center hole of the primary mirror, a center cylinder installed in the middle of the support base through spigot fitting, and a flexible diaphragm arranged between the center cylinder and the flexible mandrel. The protective component comprises an O-shaped rubber ring and a protective ring. The problem that the primary mirror may be broken due to overturn after failure of the axial support is prevented. The protective device ensures that the primary mirror can be protected under certain amplitude of vibration.

A protective textile sleeve and method of construction thereof are provided. The sleeve has a tubular wall of braided yarns extending lengthwise along a central longitudinal axis between opposite ends. At least some of the braided yarns including heat-set yarns, and the wall has a plurality of annular first regions forming generally convex ridges and a plurality of annular second regions forming generally concave valleys. The first regions alternate with the second regions along the central longitudinal axis. The first regions include a plurality of twisted yarns forming a plurality of closed loops, wherein at least some of the braided yarns pass through at least some of the closed loops within the first regions to enhance the radial stiffness and resistance of the wall to kinking.