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

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 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 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 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.