90results about How to "Reduce maximum stress" patented technology

The invention discloses a sensitive structure and accelerometer with super-high acceleration displacement sensitivity and a manufacturing method. The micromechanical sensitive structure comprises a sensitive mass block, a high-reflective film plated on the sensitive mass block, an S-shaped beam type cantilever beam connected to the sensitive mass block and a silicon substrate connected with the tail end of the S-shaped beam type cantilever beam. The lower portion of the micromechanical sensitive structure is connected with a substrate with a groove. The S-shaped beam type cantilever beam is mainly formed by sequentially connecting four straight beams of a thigh beam, a first curved beam, a second curved beam and a shank beam. The sensitive mass block and the silicon substrate are both made of SOI substrates. The cantilever beam is made of a monocrystalline silicon device layer in the SOI substrate. According to the sensitive structure and accelerometer, the super-high acceleration displacement sensitivity is achieved, small off-axis crosstalk can still be kept, a micromachining process and an IC process can be compatible, the substrate conveying rate is high, mass manufacturing is easy, and in cooperation with a displacement reading-out system based on a grating interference cavity, super-high acceleration measuring sensitivity and precision can be achieved.

The invention discloses fiber fabric with an open pore structure and a manufacturing method for a fiber composite material part with the open pore structure. The fiber track of the fiber fabric belongs to an elliptic curve family, and the lengths of a long axis and a short axis are changed progressively from an open pore part to the edge of the fiber fabric. Compared with the prior art, the fiber fabric has the advantages of fiber continuity, fiber direction parametrization, curvature radius controllability, capability of effectively reducing stress concentration, and applicability to batch production. The fiber composite material part which is made from the fiber fabric and has the open pore structure has the advantages of low cost, strong strength, convenience and easiness for manufacture and little fiber material waste.

In a silk hat-shaped external gear for a strain wave gearing, t(A)>t(C)>t(D)>t(B) is satisfied, where the thicknesses of the inner circumferential end (A), the middle part (B) and the outer circumferential end (C) of the diaphragm body portion of a diaphragm are t(A), t(B) and t(C), and where the thickness of the barrel-side end part (D) of the curved portion of the diaphragm is t(D). With reference to the thickness of the middle part (B), the thickness of the inner circumferential end (A) of the diaphragm is set so as to be thicker than conventional silk hat-shaped external gears. It is possible to realize an externally toothed gear capable of preventing diaphragm rupture due to thrust force at high load torque and having high fatigue strength.

The invention relates to a multi-axle dispersed power steering system for a load-carrying vehicle. The steering system comprises a steering mechanism and a power mechanism, wherein the steering mechanism comprises left and right rows of steering axles which are arranged at the bottom of a frame along a straight line, and first steering arms connected to the steering axles; two adjacent first steering arms are connected through a steering pull rod; at least two steering axles in the left and right rows of steering axles are connected with steering oil cylinders through second steering arms; and a steering unit consists of at least two steering oil cylinders which are symmetrically arranged in the left and right rows, and the steering axles connected with at least two steering pull rods. The steering system has the advantages that: power is dispersed; applied force output by the steering oil cylinders is more reasonable; the width and self weight of the vehicle are reduced, and the bearing capacity of the vehicle is improved; the deviation and abrasion of tires are reduced, the service life of the tires is prolonged, and cost is saved; the steering maneuverability and accuracy of the vehicle are improved, and the like.

The present invention provides a connector with locking mechanism having a structure with few maximum stress generated at a hinge jointing part serving as a fulcrum of a lock arm. The lock arm 3 is arranged on the outer wall of a housing 10. A plug 1 has the locking mechanism 11 maintaining the locked state of the plug to a receptacle 2 by the locking of the lock arm 3 to a latch part 40 formed on the receptacle 2. The lock arm 3 is composed of a hook part 3A protruded toward insertion direction of the receptacle 2, a force point part 3B including a finger pushing part, positioned at opposite side of the hook part 3A, and a fulcrum part 3C. The fulcrum part 3C supports the lock arm 3 at its both ends by a pair of torque rods 4A, 4B so as to make the hooking part 3A move in rocking motion.

The invention discloses a hock absorber for a silicone-oil belt pulley, comprising a belt pulley body, wherein the radial inner periphery of the front end face of the belt pulley body is provided with a position seam allowance for externally connecting belt pulley body, the radial outer periphery is provided with an annular inertia block cavity in which an inertia block adaptive to the shape of the inner cavity is arranged, and silicon oil is injected in the gap between the inertia block and the annular inertia block cavity; the back end face of the belt pulley body is provided with an annular heat-radiating groove, the belt pulley body is provided with a centrifugal heat-radiating hole for communicating with the inner cavity of the position seam allowance for externally connecting belt pulley body and the annular heat-radiating groove, and the diameter of the outer ring of the back end face of the belt pulley body is smaller than that of the front end face. The invention not only has compact structure, but also can effectively shorten the length of a diesel engine, thus realizing air convection of the front end face and the back end face of the shock absorber; the hock absorber for the silicone-oil belt pulley can be cooled continuously to enhance the heat radiating effect thereof, thus improving the reliability and prolonging the service life of thehock absorber for the silicone-oil belt pulley.

The invention discloses a high-efficiency all-solid-state thulium laser packaging module. The high-efficiency all-solid-state thulium laser packaging module comprises cooling heat sinks, auxiliary heat sinks, strip-shaped Tm:YAG bonding crystals, TEC cooling modules, and thermal insulation materials. Based on the characteristics that a cooling surface absorbs heat while a heat dissipation surface discharges heat in working of each TEC cooling module, the cooling heat sinks and the auxiliary heat sinks are designed to realize low temperature cooling and end part auxiliary heating to gain regions of the Tm:YAG bonding crystals; simulation and analysis proves that an end-pumping solid-state laser adopting the laser modules not only can solve the problem of vapor condensation on an optical fracture surface in low-temperature working, but also can sharply lower thermal stress of crystals, so that pumping ultimate limit of the laser and light beam quality can be improved, and the output energy and output efficiency of the thulium laser pulse can be greatly improved.

The invention discloses a bionic tire structure. The bonding mechanism of the vertebra and tenon of a snake is integrated and grafted into the end part of a belt ply of a tire, so that each belt ply forms a certain bevel angle and an interlamination difference along the horizontal and axial direction, the stress concentration on the should of the tire is improved and the stress between the belt ply and the tread rubber material is uniformly distributed. According to the belt ply structure of the tire, on the basis that an existing tire structure is only slightly modified, the bonding strength between belt ply and the tread rubber is enhanced; the occurrence that the edge part of the belt ply is likely to be displaced and deform during vulcanization later is reduced; the occurrences that the shoulder of the tire is cracked and the tire comes into burst due to overheat are reduced; the quality of the tire is greatly improved and the service life of the tire is greatly prolonged; The invention is also suitable for the design of the reverse wrapping end part of the tire; by arranging the bionic tire structure at the end parts of a reinforced layer and a carcass, the stress concentration at the bead of the tire can be remarkably reduced.

The invention discloses a centering disk, which is of a multi-layer structure formed by compounding a plurality of material layers or a multi-layer structure formed by compounding a plurality of material layers and a glue layer, and comprises a conductive layer positioned in a central area. The centering disk comprises a connecting cantilever, the connecting cantilever is connected with a first fixing part, the connecting cantilever comprises root parts and a cantilever body, the root parts are located at the two ends of the cantilever body, the first fixing part is connected with the root part of one end of the cantilever body, and the conducting layer of the root part is provided with a hollow area. Compared with the prior art, the centering disk has the advantages that the problems thatan integral copper layer is large in root rigidity, maximum in stress borne by the root and prone to fatigue fracture failure are solved, the structural rigidity of the root area is reduced, stress is reasonably distributed, the maximum stress borne by the root is reduced, and the anti-fatigue performance of the centering disk is improved.

The invention relates to a supporting seat for a balance shaft of a heavy vehicle axle. The supporting seat comprises a supporting pillar, wherein a pin shaft hole is formed in the bottom of the supporting pillar; a cross beam connection piece is arranged at the top end of the supporting pillar; a balance shaft hole is formed in the middle of the supporting pillar; and the supporting seat is characterized in that: a triangular reinforcement rib is arranged between the side face of the supporting pillar and the cross beam connection piece. As the triangular reinforcement rib is arranged between the side face of the supporting pillar and the cross beam connection piece, the maximum stress of the supporting seat is reduced from 710 MPa to 495 MPa and the reduction rate of the maximum stress is over 30 percent; and the supporting seat can properly reduce the weight of a product, so the manufacturing cost is reduced.

Provided are a rigid gear and flexible gear which are used for short-tube flexible-gear harmonic speed reducer and a machining process thereof. Inner teeth of the rigid gear are gear teeth with an inclination angle alpha, the inclination direction of the inclination angle alpha is consistent with the field angle theta2 at the position of a long shaft of the flexible gear, and the inclination angle alpha is 0.1 degree to 2 degrees. Top ends of two tooth profile curve line sections of the outer tooth profile of the flexible gear are connected through a tooth top straight line section. Each tooth profile curve line section is formed by connecting upper circular radius and lower circular radius in smooth transition mode. The harmonic speed reducer comprises the rigid gear, the flexible gear and a wave generator. The ratio of the length and the inner diameter of the flexible gear is smaller than 1. The flexible gear and the rigid gear in the short-tube flexible-wheel harmonic speed reducer are both machined through a slow-feeding wire cutting off machine. The gear teeth of the flexible gear and the gear teeth of the rigid gear are meshed in the certain inclination angle. The total contact area of the meshing teeth pair is increased by 15% compared with the condition where no inclination angle exists. Overlapping ratio of the harmonic gears is improved, and harmonic transmission rigidity is improved.

The invention relates to a self-lubricating heavy-load support sliding sleeve comprising a thick-wall barrel with an axle hole; the outer wall of the barrel is provided with a self-lubricating body, and first stress unloading holes are evenly distributed in the middle of the barrel circumferentially; the sides, pointing to the axis of the barrel, of the first stress unloading holes all communicate with stress unloading cavities wider than the first stress unloading holes and symmetrical relative to the axis of the first stress unloading holes; and one end face of the barrel is provided with a shaft end cover fixing groove. In the support sliding sleeve, materials of non-bearing areas are reduced properly, and part load is evenly absorbed through reasonable self-deformation, so that the purpose of reducing the weight of the whole support sliding sleeve is achieved, and the design difficulty of other components in combined use is reduced.