55results about How to "Good stiffness characteristics" patented technology

The invention is directed to medical leads for use with implantable medical devices. Various features of medical leads are described, many of which may be useful in a variety of different leads, e.g., used in a variety of different applications. In one embodiment, the invention provides a medical lead of varying stiffness characteristics. In another embodiment, the invention provides a medical lead having a semi-conical shaped distal tip that becomes wider at more distal tip locations. In either case, described lead features may be particularly useful for J-shaped lead configurations used for implantation in a patient's right atrium. Many other types of leads, however, could also benefit from various aspects of the invention.

An earthquake resistant equipment rack that includes multiple methods for reinforcing the equipment rack to resist seismic forces. The side rails can include two inwardly projecting V portions extending the length of the rails to diffuse seismic forces by deflecting seismic forces vertically. The base and top are preferably formed from multiple components formed from sheet metal and having both over-lapping multiple thickness of sheet metal and multiple box structures. A cover is non-removably attached to the base. In one embodiment, the cover has a dog house shape with inclined roof like surfaces.

The invention relates to a two-stage series pressurization direct-driven centrifugal air compressor of a fuel cell engine. The two-stage series pressurization direct-driven centrifugal air compressor comprises end covers, a spindle, volutes, impellers, a rotor, a stator and a driver. The spindle is supported by a left-end radial supporting air foil bearing, a left-end radial supporting air foil bearing bush, an air foil axial thrust bearing and a right-end radial supporting air foil bearing, wherein the left-end radial supporting air foil bearing and the left-end radial supporting air foil bearing bush are arranged on the left side, and the air foil axial thrust bearing and the right-end radial supporting air foil bearing are arranged on the right side of the spindle. The left-end radial supporting air foil bearing bush is arranged on the outer side of the spindle in a surrounding manner. The left-end radial supporting air foil bearing is fixed to the outer side of the left-end radial supporting air foil bearing bush. The air foil axial thrust bearing is fixed to the outer side of the spindle in a bush form. The right-end radial supporting air foil bearing is fixed to the outer side of the air foil axial thrust bearing. Compared with the prior art, the two-stage series pressurization direct-driven centrifugal air compressor is more suitable for the air inlet pressurization scene of the fuel cell engine with the high oilless air inlet requirement, and the durability and reliability of the air compressor of the fuel cell engine can be improved.

In a method for producing a control arm for arrangement on an automobile axle formed as one-piece part from a light-metal extruded profile, a semi-finished product made from a light-metal extruded profile having a Pi-shaped cross-sectional configuration with a bottom web, side webs extending from the bottom web, and legs projecting from the webs is processed by cutting, whereafter bearing seat openings are introduced and sections of the processed semi-finished product are expanded. A control arm produced with the method of the invention for arrangement on an automobile axle is also disclosed.

In a method for producing a control arm for arrangement on an automobile axle formed as one-piece part from a light-metal extruded profile, a semi-finished product made from a light-metal extruded profile having a Pi-shaped cross-sectional configuration with a bottom web, side webs extending from the bottom web, and legs projecting from the webs is processed by cutting, whereafter bearing seat openings are introduced and sections of the processed semi-finished product are expanded. A control arm produced with the method of the invention for arrangement on an automobile axle is also disclosed.

The invention relates to a plane two-degree-of-freedom seven-rod closed chain type reach stacker for containers. The plane two-degree-of-freedom seven-rod closed chain type reach stacker for the containers comprises a suspension arm and a suspension lifting and telescoping mechanism, wherein the suspension arm comprises a rotating arm and a telescopic arm; the rotating arm is hinged to the rear part of a frame; the telescopic arm is mounted on the rotating arm through a sliding pair; a clamping device is arranged at the front end of the suspension arm; the suspension arm lifting and telescoping mechanism comprises five-rod linkage mechanisms which are symmetrically arranged on the two sides of the suspension arm; each five-rod linkage mechanism comprises a front rocker, a front connecting rod, a rear connecting rod and a rear rocker; the front rockers and the rear rockers are hinged to the front part and the middle part of the frame respectively; the hinged points between the front connecting rods and the rear connecting rods are arranged on the telescopic arm. Ascending, telescoping and descending of the crane are realized under the drive of the five-rod linkage mechanisms. The plane two-degree-of-freedom seven-rod closed chain type reach stacker for the containers has the advantages of small movement inertia, flexible track output, high precision, high rigidity, excellent dynamic performance, high reliability and the like.

The invention discloses a quasi-zero stiffness vibration isolator with positive and negative stiffness in parallel connection. The vibration isolator comprises a base, an upper cover, a supporting rod, spiral springs, spacers, an annular iron core, fan-shaped permanent magnet bodies, stators, a permanent magnet body clamping mechanism, working air gaps and a guide plate. The fan-shaped permanent magnet bodies, stators, permanent magnet body clamping mechanism, and working air gaps form a magnetic flow loop, and form magnetic springs with negative magnetic stiffness. The spiral springs are connected with the supporting rod and the upper cover, and initial positive stiffness of the vibration isolator is provided and is in parallel connection with magnetic negative stiffness. The dynamic stiffness of the annular iron core in the equilibrium position is reduced. The guide plate is mounted on the lower portion of the base, and is in sliding-fit with the supporting rod. Compared with an existing quasi-zero stiffness vibration isolator, the vibration isolator has the advantages that load bearing is high, and the mechanism is compact; and as a passive vibration isolator, the vibration isolator can effectively reduce the natural frequency of the vibration isolation system, broaden a vibration isolation frequency band, and has the advantages of easy maintenance and high reliability.

Present embodiments generally relate to support structures for thin film components and methods for fabricating the support structures. In one embodiment, an apparatus comprises a device structure including portions of an electronic device; a support structure coupled to the device structure; wherein the support structure supplements features of the device structure and the support structure includes: a metal component coupled to the device structure; and a non-metal component coupled to the metal component. The support component can supplement structural and mechanical integrity of the device structure and functional operations of the device structure. In one embodiment, the metal component includes at least one layer of metal material and the non-metal component includes at least one layer of non metal material (e.g., polymeric material, etc.). The metal component can have greater stiffness characteristics with respect to the device structure and the non-metal component can have greater flexibility characteristics with respect to the metal layer component. The support structure can be configured to reflect light towards the device structure. The support structure can also be configured to conduct electricity from the device structure.

A surgical drilling instrument with a Curved Burr Attachment having an adapter removably coupled to a drill motor and a burr attachment coupled to said adapter. The burr attachment includes a tube with a wire shaft supported therein and a coil wire surrounding said wire shaft and having each of the coils touch the outer periphery surface of the wire shaft and the inner peripheral surface of said tube to enhance cooling of said outer periphery of said tube from the heat generated by said wire shaft and attenuate vibrations while allowing said burr attachment to be bent without kinking. The burr attachment includes a proximal end support and a distal end support formed on the end of said burr attachment wherein the wire shaft is affixed to said proximal end support and rotates relative to said distal end support and includes detents formed on each of the supports for engaging balls in said adapter so as to be operatively connected thereto when the burr attachment is aligned in said adapter to couple the burr attachment to said adapter for rotary motion of said wire shaft and locating the cutter of said burr attachment to a precise location relative to the end of the adapter. The burr attachment being disposable and the adapter being re-usable.

The invention relates to a chassis component for a motor vehicle comprising at least one first and a second individual component (12, 14) to form a composite component (10) having a plurality of hollow chambers, wherein the first individual component (12) has increased ductility for absorbing impact energy caused by an accident and the second individual component (142) has increased rigidity relative thereto.

The present disclosure relates to a chassis (300) for a vehicle, the chassis (300) comprising a plurality of sandwich plate elements (100) and a plurality of connection elements (200), wherein the sandwich plate elements (100) each comprise a plate core (150) and a first and second plate skin (110, 120) and wherein each connection element (200) comprises two or more recesses (210, 220), each recess (210, 220) being adapted to receive an edge portion (160) of one of the plurality of sandwich plate elements (100) such that at least a portion of the sandwich plate element (100) interacts with the recess (210, 220), thereby connecting said plurality of sandwich plate elements (100) to form said chassis (300). The disclosure also relates to a vehicle comprising a chassis (300), a method for forming a chassis (300) and a kit of parts for assembling a chassis (300).

A planar flexible beam unit (1, 40) used for the multi-blade main rotor of a helicopter is an interface between a rotor shaft (2) and the multi-blade main rotor. The planar flexible beam unit (1, 40) comprises a plurality of roughly-planar torque arms (3-7, 41-46), each of the torque arms (3-7, 41-46) has a roughly-concave arc-shaped surface (8) along its radial extension portion, and forms an integral body with its adjacent torque arm (3-7, 41-46). Each of the torque arms (3-7, 41-46) comprises two roughly-straight unidirectional fiber bundles (10-14) obtained through the agglomeration of hard synthetic resin and arranged along the roughly-concave arc-shaped surface (8) of its radial extension portion. Each of the fiber bundles penetrates into two roughly-opposite torque arms (3-7, 41-46), and has no substantial direction change.

The invention discloses a multi-reed large-deformation flexible hook hinge which comprises an outer ring I, an outer ring II, a core body and two groups of reeds; the outer ring I and the outer ring II which are perpendicular are respectively connected with the core body through one group of the reeds, and the outer ring I and the outer ring II are circular; each group of the reeds comprises at least three pairs of the reeds which are uniformly distributed in the outer ring I and the outer ring II; each pair of the reeds consists of two reeds, and the two reeds form a circular arc from the position which is near to the core body in the reverse directions and are connected onto the outer ring I or the outer ring II for constituting one pair of the reeds; and grooves are respectively formed in the intersection positions of the outer ring I and the outer ring II, wherein an opening of the groove of the outer ring I faces to the outside and the opening of the groove of the outer ring II faces to the inside so as to keep an interval between the intersection positions of the outer ring I and the outer ring II, and the outer ring I is positioned on the outer side of the outer ring II. The flexible hook hinge is the multi-reed flexible hinge structure which has the advantages of large stroke and high precision. Furthermore, the axis drift during the rotation is very small, thereby being applicable to large-stroke precision control structures.

The invention provides a high-rigidity transverse folding airfoil which comprises an outer wing and an inner wing, wherein the outer wing is capable of rotating relative to the inner wing through a rotating shaft; a power device used for driving the outer wing to rotate is mounted in the rotating shaft; and a locking device used for limiting the rotation of the outer wing is mounted in the outer wing or the inner wing. According to the high-rigidity transverse folding airfoil provided by the invention, a titanium alloy framework added with skin is adopted as an airfoil structure, so that the structural weight can be reduced when the airfoil rigidity is guaranteed; serving as a main connecting part between the outer wing and the inner ring, the rotating shaft transfers and bears the load from the outer ring; a torsion bar is adopted as an unfolding power source, the occupied space of the torsion bar is small, and the unfolding mode is simple and reliable; double locking pins are adoptedas locking components of a locking mechanism, compression springs are adopted as power sources, the locking pins are designed to be conical cylinders, and the property of rigidity after locking is good; when the folding function of the high-rigidity transverse folding airfoil is achieved, the high-rigidity transverse folding airfoil is higher in rigidity and stronger in flutter-resistant capability; and the higher flying speed can be achieved.

A motor-vehicle wheel structure comprises a wheel rim and a wheel disk having a circumferential border bent and welded within the wheel rim, and a central portion bearing a circumferential series of holes for engagement of bolts for fixing the wheel to the wheel support. The central portion is radiused to the circumferential border of the disk by means of an intermediate annular portion having in cross section an arched configuration projecting outwards. The intermediate annular portion has a plurality of embossed portions projecting outwards, configured in such a way as to define a plurality of spokes set at the same angular distance apart from one another.

The invention discloses a plane two-freedom-degree nine-rod closed-chain type reach stacker. The plane two-freedom-degree nine-rod closed-chain type reach stacker comprises a crane jib and a crane jib lifting telescopic mechanism. A rotatable jib of the crane jib is hinged to the rear portion of a vehicle machine. A telescopic jib is installed on the rotatable jib through a sliding pair. The front end of the telescopic jib is provided with a clamping device. The crane jib lifting telescopic mechanism, namely a five-connecting-rod mechanism assembly comprises front rocking rods, front connecting rods, rear connecting rods and a four-connecting-rod mechanism, wherein the front rocking rods are hinged to the front portion of the vehicle frame, the front connecting rods are hinged to the front rocking rods, the four-connecting-rod mechanism is arranged in the middle of the vehicle frame, and front four-connecting-rod mechanism rocking rods and rear four-connecting-rod mechanism rocking rods are hinged to the vehicle frame. The hinged point between each rear connecting rod and the corresponding rear four-connecting-rod mechanism rocking rod and the hinged point between each rear connecting rod and the corresponding four-connecting-rod mechanism connecting rod are composite hinges. The hinged point between each front connecting rod and the corresponding rear connecting rod is arranged on the telescopic jib. The plane two-freedom-degree nine-rod closed-chain type reach stacker has the advantages that the movement inertia is small, track output is flexible, the precision is high, the rigidity and the dynamic performance are good, and the reliability is high.

A thermal bend actuator (6) is provided with a group of upper elongate actuator arms (23, 25, 26) and a group of lower elongate actuator arms (27, 28) which are non planar, so increasing the stiffness of the arms. The arms (23, 25, 26, 27, 28) may be spaced transversely of each other and do not overly each other in plan view, so enabling all arms to be formed by depositing a single layer of arm forming material.

The invention discloses a hydro-pneumatic suspension cylinder with a controllable stroke. The hydro-pneumatic suspension cylinder comprises a piston rod, a piston, an internally piloted valve group, a cylinder barrel, a sealing seat ring, an energy storage device, a control valve, a pipeline, a gas-liquid booster pump and a flow rate control cylinder. The suspension cylinder internally comprises an auxiliary oil cavity and an inner cavity of the suspension cylinder, wherein the auxiliary oil cavity is completely isolated from the inner cavity of the suspension cylinder. The inner cavity of the suspension cylinder comprises an inner cavity of the cylinder barrel and an inner cavity of the piston rod, and the middles are communicated through the internally piloted valve group to form a complete inner cavity system of the suspension cylinder. The auxiliary oil cavity is externally connected with the control valve and the energy storage device through the pipeline to form an independent external control loop. The external control connectors of the gas-liquid booster pump and the flow rate control cylinder are connected with the inner cavity system of the suspension cylinder and the external control loop respectively to form two independent channels for equal-pressure / synchronous control. Stroke control on the suspension cylinder is realized through the operation of inner reversing valves of the gas-liquid booster pump and the flow rate control cylinder. The inner cavity system of the suspension cylinder and the external control loop form a double-air-chamber negative pressure opposite structure through the inner cavity of the cylinder barrel and the auxiliary oil cavity. The internally piloted valve group carries out automatic variable-damping control on the inner cavity system of the suspension cylinder according to a system pressure.

The present disclosure relates to a chassis (300) for a vehicle, the chassis (300) comprising a plurality of sandwich plate elements (100) and a plurality of connection elements (200), wherein the sandwich plate elements (100) each comprise a plate core (150) and a first and second plate skin (110, 120) and wherein each connection element (200) comprises two or more recesses (210, 220), each recess (210, 220) being adapted to receive an edge portion (160) of one of the plurality of sandwich plate elements (100) such that at least a portion of the sandwich plate element (100) interacts with the recess (210, 220), thereby connecting said plurality of sandwich plate elements (100) to form said chassis (300). The disclosure also relates to a vehicle comprising a chassis (300), a method for forming a chassis (300) and a kit of parts for assembling a chassis (300).

A motor-vehicle wheel structure comprises a wheel rim and a wheel disk having a circumferential border bent and welded within the wheel rim, and a central portion bearing a circumferential series of holes for engagement of bolts for fixing the wheel to the wheel support. The central portion is radiused to the circumferential border of the disk by means of an intermediate annular portion having in cross section an arched configuration projecting outwards. The intermediate annular portion has a plurality of embossed portions projecting outwards, configured in such a way as to define a plurality of spokes set at the same angular distance apart from one another.

A thermal bend actuator (6) is provided with a group of upper elongate actuator arms (23, 25, 26) and a group of lower elongate actuator arms (27, 28) which are non planar, so increasing the stiffness of the arms. The arms (23, 25, 26,27,28) may be spaced transversely of each other and do not overly each other in plan view, so enabling all arms to be formed by depositing a single layer of arm forming material.

The invention relates to a space-controlled five degree of freedom twelve-rod welding robot mechanism which comprises a plane two degree of freedom controlled mechanism branch chain, three gesture regulating branch chains, a movable platform with a flange plate, and a stand, wherein the back of the movable platform is respectively connected with the four branch chains through a first spherical pair, a third spherical pair, a fifth spherical pair and a seventh spherical pair; and the flange plate on the movable platform is used for installing equipment, such as a welding gun or welding tongs and the like. All servo motors are arranged on the stand, and a lever can be made into a light rod, thus the robot has small motion inertia and good dynamic property, and can better satisfy the requirement for high-speed accurate welding.

A forged hollow axle, particularly a steerable axle, is designed for a commercial vehicle. The axle has a main longitudinal extension in a y-direction, a width in an x-direction and a height in a z-direction and is composed of at least two half shells fixedly joined at an interface which extends along its longitudinal extension. A material thickness in one or both of the half shells is distributed in the main longitudinal extension and in one or both of width and height to provide a predetermined relation of a torsional stiffness and a bending stiffness in one or more spatial directions in one or more axle sections.

Provided is a collaborative energy dissipation anti-buckling supporting construction member with a major earthquake protection function. An outer arresting cylinder encloses an energy dissipation inner core plate from the outer portion, an end portion connecting plate and an outer arresting cylinder outer connecting plate are arranged at two ends of the outer arresting cylinder, one end of the outer arresting cylinder is fixed on the end portion connecting plate, the other end is free from being connected, one end of the energy dissipation inner core plate is fixed on the end portion connecting plate, the other end of the energy dissipation inner core plate is connected with the end portion connecting plate in a welded mode, the end portion connecting plate is fixed on the outer arresting cylinder outer connecting plate, the energy dissipation inner core plate is connected with a friction automatic restoration device through an outer arresting cylinder outer connecting plate of a welding end, and thus series connection between a traditional anti-buckling supporting construction member and the friction automatically reset device is achieved to form the novel anti-buckling supporting construction member which has an automatic restoration characteristic and can achieve friction and cross-section yield collaborative energy consumption in an over-expected earthquake even a mega-earthquake. The problems of safety, continuous energy dissipation ability and restoration after the earthquake of the traditional anti-buckling supporting construction member in the over-expected earthquake even the mega-earthquake are resolved.

The invention discloses a rear drive transmission shaft supporting piece of an integrated bidirectionally-vulcanized structure. The rear drive transmission shaft supporting piece of the integrated bidirectionally-vulcanized structure comprises a middle supporting installation support, a middle supporting bearing and middle supporting main springs. The two middle supporting main springs are in the same shape and are symmetrically arranged, each middle supporting main spring is of a rotary body structure, and the radial section of each middle supporting main spring is of a C-shaped structure. Each middle supporting main spring comprises an edge side and a bent side. The edge sides of the two middle supporting main springs are arranged oppositely. An inner side portion and an outer side portion which are both of an annular structure are arranged between the edge side and the bent side of each middle supporting main spring. Connecting portions used for connecting the inner side portions with the outer side portions are arranged on the bent sides of the middle supporting main springs. Radial protrusions of annular structures are arranged on the edge sides of the inner side portions towards the outer side portions. The rear drive transmission shaft supporting piece of the integrated bidirectionally-vulcanized structure can overcome the defects of the prior art and meet actual use requirements. The invention further discloses a machining method of the rear drive transmission shaft supporting piece of the integrated bidirectionally-vulcanized structure.

The invention discloses a double-bracket vibration damping front drive axle of a tractor. The double-bracket vibration damping front drive axle comprises a fixed bracket mounted at the bottom of a tractor body, a floating bracket is hinged to the rear portion of the fixed bracket, a vibration damping device is arranged between the fixed bracket and the floating bracket, and the drive axle assemblyis mounted on the floating bracket through a rocking shaft. Due to the fact that the driving axle assembly can swing left and right relative to the floating bracket, in the driving process of the tractor, the driving axle assembly can swing left and right around a hinge point between the floating bracket and the driving axle assembly, front axle driving wheels can be always attached to the ground, the contact condition between the front axle driving wheels and the ground and the adaptability to various terrain are better; the vibration damping device is arranged between the fixed bracket andthe floating bracket, so that the vibration and impact of the tractor during driving on the uneven road surface can be greatly reduced, and the dynamic load on the driving wheels and an axle and the damage of the part are reduced; and the front drive axle also has the advantages of being good in rigidity performance, good in driving stability, comfortable in vibration damping, simple in structureand the like.