52results about How to "Satisfy the rigidity requirement" patented technology

A light emitting portion of a multi-optical-path photoelectric switch comprising: a predetermined number of light emitting devices for emitting lights; a first case having a male connector disposed at one end, a female connector diposed at the other end, a surface between both ends made of a light transmissive resin, the surface through which the lights from the light emitting devices pass; a fixing frame holding the first case, and having the substantialy same length as the first case; and a second case accommodating a portion of the fixing frame while a residual portion of the fixing frrame is projected therefrom, wherein the light emitting units are mechanically and electrically connected to one another by inserting the portion of the fixing frame thus projected of either of adjacent light emitting units into the second case of the other adjacent light emitting unit. A light receiving portion of the multi-optical-path photoelectric switch comprises the similar structure.

The present invention provides a semiconductive belt including a substrate and a surface layer, wherein: the substrate contains a resin; the Young's modulus of the substrate is 1000 to 8000 MPa; the surface layer contains a lubricant component, a fibrous filling material, and an elastic material; and the durometer hardness of the surface layer is A30 / S to A70 / S.

Disclosed is a variable geometry and constant-volume inflatable tube, including an inflatable envelope having a central axis. A stress-bearing unit is provided, including a pair of first and second inextensible link belonging to a same longitudinal half-plane of the envelope, the first unit being oriented along a first longitudinal direction inclined with respect to the central axis and the second unit being oriented along a second longitudinal direction which is also inclined with respect to the central axis but which crosses the first direction on the central axis. The inflatable tube can be bent around a first or second pivot axis, the longitudinal tensile stresses applied to the envelope then being concentrated on the central axis.

The invention discloses a pull rod node assembly and a design method thereof. The pull rod node assembly comprises a pull rod and a node pressed into the pull rod; the node is composed of a core shaftand rubber bonded to the core shaft in a vulcanized mode. The node is characterized in that a part, matched with the pull rod, of the node is divided into three sections, wherein a stop section is located in the middle and has a stop function, and symmetrical sections are arranged on the left side and the right side of the stop section in a mirror symmetry mode; the core shaft diameter of the stop section is larger than that of the symmetrical sections, the rubber thickness of the stop section is smaller than that of the symmetrical sections, the rubber of the stop section is in a free state,and the rubber of the symmetrical sections is in a pre-compression state. Comfortable performance is improved, rigidity requirements under large loads and damping requirements and bearing requirements of the node under different lines are met, fatigue life of products is prolonged, and safety of vehicle operation is guaranteed.

The invention discloses a three-degree-of-freedom large expansion ratio translational parallel mechanical arm based on a tape measure spring, which includes two W-shaped tape measure movement units, a telescopic connection hub and a bottom working platform; the W-type tape measure movement unit is connected through the connecting rod contained therein. The telescopic communication hub is connected with the bottom working platform so that the bottom working platform can move horizontally along a certain direction. In the present invention, the two W-shaped measuring tape movement units are space-staggered and vertically distributed, and cooperate with the telescopic connection hinge to make the bottom platform have a three-dimensional working space with three degrees of freedom, which can realize telescopic, left-right and front-back translation, and adopts automatic shrinkage The flexible tape spring is used as the link arm, which has a simple structure and small mass, which not only meets the rigidity requirements of the mechanical arm, but also its flexible scalability and the expansion and contraction characteristics of the connecting hub make the expansion ratio of the mechanical arm extremely large. After the mechanical arm is fully retracted, the The occupied volume is very small, which is easy to carry or carry out operations.

The invention provides a motion mechanism with variable rigidity and flexibility. The motion mechanism comprises a motion chain and a drive mechanism, the motion chain comprises two symmetrically installed motion single chains, each motion single chain comprises a plurality of inner sections and a plurality of outer sections, each of the inner sections and the outer sections is formed by two contact sheets, two hinge foundation pillars are arranged between the two contact sheets of each inner section, two hinge base holes penetrate the position between the two contact sheets of each outer section, the hinge foundation pillar at the lower end of the inner section is movably installed with the hinge base hole at the upper end of the outer section, the hinge foundation pillar at the upper endof the inner section is movably installed with the hinge base hole at the lower end of the other section, the inner sections and the outer sections are installed in order from top to bottom at intervals, connection bulges are arranged at the middle positions of the sides of the contact sheets of the inner sections and the outer sections, the end faces of the connection bulges are provided with locking mechanisms, and a charging execution device is installed above the motion chains. The motion mechanism with variable rigidity and flexibility solves the problems that a current motion mechanismhas a fixed motion performance and cannot achieve free conversion of the rigidity and the flexibility so that the motion mechanism is not flexible enough and is small in application range.

The invention provides a rigidity-adjustable orthopedic insole. The insole is made of upper and lower layers including an intelligent deformation layer and a structural support layer, wherein the intelligent deformation layer is closely attached to the sole of a patient, made of a flexible polymer intelligent material and non-uniformly distributed in a foot arch area of the insole; the structuralsupport layer is the lowest layer and made of a structure material with bearing capacity. The intelligent deformable material is added to the orthopedic insole, time dimension is introduced on the basis of existing 3D printing, and 4D printing is formed. With change of the recovery condition of foot malformation degree of the patient in the orthopedic process, the intelligent deformation layer inthe orthopedic insole obtained through 4D printing forming has self-deformation such as expansion, bending, shrinkage and folding under excitation of an external field, and orthopedic insole shape andrigidity timely coordinated with foot malformation of the patient are formed, so that personalized customization of the orthopedic insole and timely self-adjustment of rigidity and shape are realized.

The invention provides a damping friction support comprising an upper seat plate and a lower seat plate. The upper seat plate and the lower seat plate are matched in a sliding mode. A pair of transverse damping assemblies and a pair of longitudinal damping assemblies are arranged between the upper seat plate and the lower seat plate. A pair of transverse sliding groove sets and a pair of longitudinal sliding groove sets are arranged on the upper seat plate. The transverse damping assemblies comprise transverse steel damping elements. The upper portions of the transverse damping element are slidably arranged on the transverse sliding groove sets, and the lower portions of the transverse damping elements are fixed on the lower seat plate. The longitudinal damping assemblies comprise longitudinal steel damping elements. The upper portions of the longitudinal steel damping element are slidably arranged on the longitudinal sliding groove sets, and the lower portions of the longitudinal steel damping elements are fixed on the lower seat plate. The damping friction support has the advantages that the safety and seismic resistant performance of the support are improved.

The present invention relates to the technical field of wind tunnel aerodynamic test measurement, in particular to the calibration of wind tunnel balances, in particular to a load calibration loading head for wind tunnel balances, including a body on which several horizontal loading mechanisms and longitudinal loading mechanisms are arranged. The horizontal loading mechanism and the longitudinal loading mechanism include horizontal connecting parts and longitudinal connecting parts for applying horizontal force and longitudinal force respectively, and the several horizontal connecting parts are used to provide calibration loads in the four directions of horizontal x and y, so The several longitudinal connections described above are used to provide calibration loads in the two directions of the longitudinal direction z. The invention optimizes the structure of the loading head, and simulates the force of the wind tunnel balance in multiple dimensions by setting multiple horizontal loading mechanisms and longitudinal loading mechanisms, so that the calibration of the wind tunnel balance is more accurate; at the same time, the structure of the body is While meeting the rigidity requirements, it greatly reduces its own weight and further improves the calibration level of the wind tunnel balance.