30results about How to "Good self-centering performance" patented technology

The invention discloses a differential mechanism coupling wheel set used for an urban rail vehicle. According to the coupling wheel set, an independent wheel set on the left side and an independent wheel set on the right side are coupled through a high-friction self-locking differential mechanism, and the high-friction self-locking differential mechanism is provided with a driving and driven friction plate set which can provide pre-tensioning friction torque so that the differential mechanism can be locked by itself. In a linear segment and a major radius curved segment, the different between the friction torque of a left wheel track and the friction torque of a right wheel track is smaller than the pre-tensioning friction torque of the driving and driven friction plate set, and at the moment the differential mechanism is locked, so that the left wheel and the right wheel are coupled together to rotate synchronously and have the self-guiding and self-centering capacity of traditional wheels; in a minor radius curved segment, the different between the friction torque of the left wheel track and the friction torque of the right wheel track is larger than the pre-tensioning friction torque provided by the driving and driven friction plate set, at the moment the differential mechanism is unlocked and starts a differential speed, so that the left wheel and the right wheel have different rotation speeds, and the vehicle can pass through a minor radius curve smoothly. The wheel set solves the problem of wheel track abrasion of the urban rail vehicle and the problem of passing through the minor radius curve and has the same connector as a transmission wheel set, so that interchangeability is good.

The invention discloses a two-way controllable releasable vena cava filter. The filter comprises a filtering part and a supporting part, the filtering part is of a grid structure which is formed in the mode that a plurality of supporting rods are cross-linked with each other, and the supporting part comprises a first supporting part and a second supporting part which are arranged on two sides of the filtering part, wherein the opening of the first supporting part is opposite to that of the second supporting part; the first supporting part gradually extends from the center to the outside in the forward direction and gradually overturns and curls in the reverse direction; the second supporting part gradually extends from the center to the outside in the forward direction. According to the two-way controllable releasable vena cava filter, implantation and recycling of the filter can be conducted through the femoral vein and the jugular vein, the thrombus filtering effect is good, the filter can be recycled after being implanted for a long time, and the filter can be more easily captured and recycled.

The invention provides an under-actuated space capturing device with self-adaptability. One ends of a plurality of clamping heads are positioned outside a shell; the other ends of the plurality of clamping heads extend into the shell through a shell end surface opening and are hinged to one end of a telescopic rod; torsion springs are mounted at the hinging positions; the telescopic rod is drivento move in a reciprocating manner in the axial direction of the shell so as to drive the clamping heads to extend out or retract into the shell; when the clamping heads extend out of the shell, the clamping heads are opened outwards in the radial direction of the shell under the effect of the torsion springs; the clamping heads are extruded by the shell end surface opening when retracting into theshell, and the clamping heads are closed to capture a target; pressure sensors are mounted at the contacting parts of the clamping heads and the target to feed back and control motion of the telescopic rod. The under-actuated space capturing device with self-adaptability has the advantages that the structure is small, simple and convenient, the cost is low, the labor is saved, the service life islong, automatic centering is realized, the clamping is reliable, continuous capturing and releasing of multiple targets can be realized, clamping head components possess self-adaptability and wide interface applicability; and greater application values in space operation tasks such as repairing, auxiliary orbit insertion and deorbiting of a failed satellite are realized.

The invention relates to a left auricle occluder with bionic spinule attachment structures. The left auricle occluder at least comprises an attachment frame; the attachment frame includes a pluralityof elastic skeletons and a plurality of bionic spinule attachment structures; under a natural unconstrained state, the plurality of skeletons diverge outwards from the center and define a three-dimensional structure, and the attachment frame has anatomical form adaptability; the bionic spinule attachment structures are arranged on outer surfaces of the skeletons; each of the bionic spinule attachment structures has a form of imitating sparse spinules on the surface of a plant; each bionic spinule attachment structure includes a spinule root and a spinule; each spinule consists of a spinule body and a spinule tip; each spinule is in a straight line shape or a J shape or a combination of the straight line shape and the J shape; and the spinule bodies and/or the spinule tips can touch left auricle inner cavity tissues, thus realizing an attachment-type anchoring function. The left auricle occluder has a wide adaption range, has no injury during anchoring, is firm, has high safety, has excellent occluding effectiveness, and also facilitating realization of personalized customization aiming at clinical demands of patients.

The invention provides a proportional valve. The proportional valve comprises a valve body (1) and a valve core (2) arranged in a cavity (12) of the valve body (1), and the valve core (2) and the valve body (1) are matched by a conical surface. The proportional valve according to the invention has the advantages of flexible mechanism, stable precision, high controllability, lightness and durability, and can realize precise control and self-centering.

The invention discloses a self-centering double-locked holding turnover mechanism. The mechanism comprises parts such as a mounting base, a guide rail, holding claw arms, a holding claw drive air cylinder, holding claws, a turnover drive motor, a centering locking base, a guide rod and a stopping block. The mounting base of the mechanism is installed on external equipment. A guide rail component is installed on the mounting base. Two holding claw arms are installed on the guide rail component, wherein the turnover drive motor and one holding claw are installed on one holding claw arm, and the other corresponding holding claw is installed on the other holding claw arm. The two holding claws are connected through the two ends of the guide rail. The two ends of the holding claw drive air cylinder are installed on the two holding claw arms respectively. One end of a centering locking module is installed on one of the holding claw arms, and the other end of the centering locking module is installed on the mounting base. According to the self-centering double-locked holding turnover mechanism, the holding claws and the holding claw drive air cylinder are replaced to firmly hold workpieces in different sizes and shapes, and the holding turnover mechanism has large compatibility. The self-centering double-locked holding turnover mechanism is simple in structure, stable, reliable and high in holding centering positioning.

The invention discloses a port plate of a swash plate type plunger pump and motor. The port plate is characterized in that the contact face between a cylinder body and the port plate is in a spherical shape, projection of a front face port window (3), namely a spherical face side port window (3), of the spherical port plate on the back face, namely the planar face side, of the spherical port plate and projection of a back face port window (4), namely a planar face side port window (4) are arranged in a staggered mode, the front face port window is communicated with the back face port window through an oil channel, the diameter (D1) of the outer side of the back face port window is larger than the diameter (d1) of the outer side of the front face port window, and the diameter (D2) of the inner side of the back face port window is larger than the diameter (d2) of the inner side of the front face port window; the port plate is of a double-body type structure which is composed of the port window and a transition plate (5B); the cylinder body matched with the port plate of the swash plate type plunger pump is characterized in that the cylinder body is communicated with the oil channel of the spherical face side port window and a plunger cavity, and an included angle is formed between the cylinder body and the cylinder body axis. According to the port plate of the swash plate type plunger pump and motor and the matching cylinder body thereof, the volume efficiency and the mechanical efficiency of a product are improved, the suction capacity is improved, and the allowable rotary speed of a pump is higher under the same oil suction pressure.

The invention discloses a motor limiting structure for a multistage pump, and belongs to the technical field of water pumps. The stability of rotation of a motor shaft can be effectively improved. According to key points of the technical scheme of the motor limiting structure for the multistage pump, a motor cylinder, a motor and the motor shaft are included, both the motor and the motor shaft aremounted in the motor cylinder, an upper connecting seat and a lower connecting seat are arranged at the two ends of the motor cylinder correspondingly, the upper connecting seat and the lower connecting seat each comprise a shaft hole allowing the motor shaft to penetrate through, a thrust structure sleeving the motor shaft is arranged between the lower connecting seat and the motor and comprisesan upper friction piece, a lower friction piece and a thrust seat which are sequentially arranged from top to bottom, a spherical groove is formed in the top end of the lower connecting seat, and thebottom face of the thrust seat is provided with a spherical convex block matched with the spherical groove.

The invention discloses a self-centering cable support device with an out-of-plane buckling metal damper. The self-centering cable support device comprises a base, a belleville spring set, a wall fixator, the out-of-plane buckling metal damper, a U-shaped connecting groove, a high-strength screw, a connecting steel block, a limiting bolt and an end distance adjusting fixator. The self-centering cable support device is connected with a wall through the wall fixator, and the belleville spring set provides self-centering and the out-of-plane buckling metal damper for energy consumption. The device is fixed into the wall through the wall fixator by using the bolt, and the belleville spring set is connected in series in the high-strength screw connected with the base. Prestress is applied to the belleville spring set by adjusting the end distance adjusting fixator, and the out-of-plane buckling metal damper is fixed into the U-shaped connecting groove connected with the wall fixator in a welded mode through the bolt. Under the action of external force, the high-strength screw drives the belleville spring set and the out-of-plane buckling metal damper to move to achieve the purposes of self-centering and energy consumption. The self-centering cable support device is easy to manufacture, convenient to construct and install, low in cost and high in energy consumption and self-centering capacity.