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

The invention discloses a thrombus filter, which comprises a filter tray, an elastic supporting frame and a central rod, wherein the filter tray is of a contractible structure; the filter tray is connected to the tail end of the central rod; the elastic supporting frame is connected to the upper end of the central rod; and a recovery end is arranged at the top end of the central rod. The thrombus filter disclosed by the invention is stably fixed in inferior vena cava, and is simple in recovery operation, strong in self-centered capacity, not easy for inclination and good in thrombus filtering effect.

The invention discloses an adjustable lightweight rock-fishing fishing reel, comprising a reel shell, a pulling force adjusting knob, a reel axis, a reel, etc. The invention is characterized in that a self-centering clutch bearing sheathed and installed on the inner sleeve of the bearing is arranged at the cylindrical internal wall at the hub of the reel, the internal wall of the outer ring of the self-centering clutch bearing is respectively provided with a left retainer and a left centering roller pin, a middle retainer and a middle clutch roller pin, as well as a right retainer and a rightcentering roller pin, wherein, a spring flake is arranged on the middle retainer. The external wall of the outer ring and the middle part of the internal wall of the self-centering clutch bearing areprocessed with a plurality of outer cuneiform bulges and a plurality of inner grooves for the cuneiform bulges evenly. The self-centering clutch bearing organically integrates the left retainer and the left centering roller pin, the middle retainer and the middle clutch roller pin, as well as the right retainer and the right centering roller pin together, thus showing good self-centering effect and improving the accuracy of the gyration centre of the clutch bearing. The fishing reel also has the advantages of adjustable pulling force, convenient assembling, small volume, light weight, etc.

The invention discloses a vena cava filter of multilayer filtration. The vena cava filter comprises at least two filter parts arranged at intervals in the axial direction, and a connecting rod used for making the two filter parts connected is arranged between adjacent filter parts; each filter part extends from the center to the outer sides of far ends, is everted and curled in the reverse direction step by step, and supported on the inner wall of a blood vessel in a point mode respectively. Aiming at the defects that the releasing process is uncontrollable and the blood vessel wall is likely to be damaged due to the problems that, in the prior art, filters are released through a femoral vein, bounce is likely to occur and positioning is inaccurate, the vena cava filter of multilayer filtration which can be controllably released in dual directions is provided; not only can the vena cava filter of multilayer filtration be implanted and recycled through a femoral vein and a jugular vein, but the vena cava filter of multilayer filtration has better self-centrality and is easier to capture and recycle.

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 relates to a negative pressure angle conical working tooth surface differential lock. A slidable joint sleeve and a stationary joint sleeve are connected together via the joint between an end surface tooth of the slidable joint sleeve formed on the end surface of the slidable joint sleeve and an end surface tooth of the stationary joint sleeve formed on the end surface of the stationary joint sleeve. The slidable joint sleeve is provided with an end surface tooth of the slidable joint sleeve and a slidable joint sleeve body; the tooth top surface and tooth groove surface of the end surface tooth of the slidable joint sleeve are parallel to each other in the axial section and are higher outside and lower inside; the acute angel between the tooth top surface and the tooth groove surface and a rotation axis is beta; a bore of the slidable joint sleeve body is an internal spline of the slidable joint sleeve; the stationary joint sleeve is provided with an end surface tooth of the stationary joint sleeve and an integrally-formed stationary joint sleeve body; the tooth top surface and tooth groove surface of the end surface tooth of the slidable joint sleeve are parallel to each other in the axial section and are lower outside and higher inside; the acute angel between the tooth top surface and the tooth groove surface and a rotation axis is also beta; and a bore of the stationary joint sleeve body is an internal spline of the stationary joint sleeve. In the invention, slide wheels or axles are temporarily and rigidly stopped so as to improve the cross-country capability.

A spiral drill features that its back cutting surface is composed of a uniparted hyperboloid close to drill center and an ellipsoidal surface. Its advantages are high automatic centering performance, drilling precision and durability.

The invention discloses a motor limiting structure of a multi-stage pump, which can effectively improve the stability of the rotation of the motor shaft. The key points of the technical solution include a motor barrel, a motor and a motor shaft, and the motor and the motor shaft are installed in the motor barrel. The two ends of the motor barrel are respectively provided with an upper connecting seat and a lower connecting seat. Both the upper connecting seat and the lower connecting seat include a shaft hole through which the shaft of the power supply passes. The upper thrust structure, the thrust includes the upper friction plate, the lower friction plate and the thrust seat arranged in sequence from top to bottom, the top of the lower connection seat is provided with a spherical groove, and the bottom surface of the thrust seat is provided with a spherical groove. The matching spherical bump, the invention is applicable to the technical field of water pumps.

The invention discloses a two-way controllable release vena cava filter, comprising a filter part and a support part, the filter part is a grid structure formed by cross-linking a plurality of struts, and the support part is included on both sides of the filter part The first support part and the second support part with the opposite opening on the side; the first support part is formed by extending outward from the center forward and gradually reversed and curled; the second support part is gradually extended from the center forward formed by extension. The invention provides a two-way controllable release vena cava filter that can be implanted and recovered through both the femoral vein and the jugular vein, has good thrombus filtering effect, can be implanted for a longer period of time and is easier to be captured and recovered.

The invention provides a silicon chip edge protection apparatus with a self-locking gripper. The apparatus comprises a servo motor, a speed reducing mechanism, a vertical motion mechanism and a gripper device, the gripper device comprises a downward cone cam and a push rod clinging to the cone cam, and the conical surface of the cone cam pushes a lever through the push rod in order to drive the gripper to close and shut in the vertical motion process of the gripper device. The silicon chip edge protection apparatus with a self-locking gripper has the advantages of simple structure, good manufacturability, easy processing manufacturing, good self-centering property, strong adaptability, self-locking function, and prevention of clamping deformation due to a protection ring.

The invention discloses a novel load holding valve, and belongs to the technical field of hydraulic valves. A valve core mounting hole I and a valve core mounting hole II are formed in a valve body; aone-way valve core is mounted in the valve core mounting hole I; a spring I is arranged in a spring cavity in the right end of the one-way valve core; a plug, a cone valve core and an ejector rod aresequentially mounted in the valve core mounting hole II from left to right; the cone valve core is mounted in the valve core mounting hole II in a sliding manner; a gap H is formed between the circumferential surface of the cone valve core and the inner wall of the valve core mounting hole II; a matched sealing structure is formed between the left end of the cone valve core and an oil channel D of the plug; a matched sealing structure is arranged between the right end of the cone valve core and the inner step of the valve core mounting hole II; and a spring II is arranged in a spring cavity in the left end of the ejector rod. The novel load holding valve is simple in structure, the processing technology is convenient, when a load is held, only two valve cone surfaces form a sealing zone,the leakage rate is small, a throttle formed between the cone valve core and the valve core mounting hole II is a clearance throttle, the possibility of blocking is low, and the requirement on the cleanness of oil is relatively low.

The invention discloses a flow distribution plate of a swash plate type plunger pump and a motor, which is characterized in that: the contact surface between the cylinder body and the flow distribution plate is in a spherical shape, and the front spherical side flow distribution window (3) of the spherical flow distribution plate is on the plane of the back surface The projection on the side is misaligned with the side flow distribution window (4) on the back plane, and the front flow distribution window and the back flow distribution window are connected through an oil passage, and the outer diameter (D1) of the back flow distribution window is larger than that of the front flow distribution window (d1 ), the inside diameter (D2) of the back flow distribution window is larger than the inside diameter (d2) of the front flow distribution window; the flow distribution plate is a two-body structure, that is, the flow distribution plate and the transition plate (5B) form the structure; the one A cylinder block matched with a flow distribution plate of a swash plate type plunger pump is characterized in that: the oil channel connecting the spherical flow distribution window and the plunger cavity on the cylinder body forms an included angle with the axis of the cylinder body. The invention improves the volumetric efficiency and mechanical efficiency of the product, improves the self-priming ability, and the allowable rotational speed of the pump is higher under the same oil-absorbing pressure.

The invention discloses an intelligent detector for deep sea submarine pipelines and a detection method. The intelligent detector comprises a left seal cover, a left seal head, a mounting bracket, a connecting rod, a left clamping sleeve, a first spring, a main body, a second spring, a leather cup, a right seal head, a controller, a right sealing cover, a right seal cover, a right clamping sleeve, a telescopic rod, a guide rod, wheel support rods, a distance sleeve, screws and a left sealing cover; the detection method comprises the following steps: (1), arranging the intelligent detector for the deep sea submarine pipelines into a pipeline to be detected; (2), pumping high-pressure water into the pipeline to be detected, so as to push the intelligent detector for the deep sea submarine pipelines to move forward; (3) gathering detection information; computing the travel of the intelligent detector for the deep sea submarine pipelines during advancing through a distance measuring wheel; gathering the amount of deformation through a displacement sensor; (4), transmitting detected information; storing and transmitting information gathered in the third step through the controller.