40results about How to "To achieve the effect of self-locking" patented technology

The invention belongs to the technical field of industrial fastening pieces, and in particular, relates to a self-locking bolt. The self-locking bolt comprises a bolt body and a gasket; the bolt bodycomprises a bolt head and a screw rod connected with each other; the gasket sleeves the screw rod; multiple first inclined teeth are arranged at the end, contacted with the gasket, of the bolt head; second inclined teeth matched with the first inclined teeth are arranged at the end, contacted with the bolt head, of the gasket; a loose thrust surface is arranged on the first inclined teeth; an included angle between the loose thrust surface and the horizontal plane is larger than a lead angle of the screw rod; and the friction coefficient between the end, far from the bolt head, of the gasket and the surfaces of workpieces is larger than the friction coefficient between the contact surfaces of the first inclined teeth and the second inclined teeth. The self-locking bolt can preferably realize self-locking without needing cooperation, and is excellent in self-locking effect.

The invention relates to a femoral intramedullary nail and a femurutilizing the femoral intramedullary nail. The femur comprises a femoral head and the femoral intramedullary nail. The femoral intramedullary nail comprises a main nail, a core nail and anti-rotary blades. The main nail comprises a nail head and a nail rod. The nail head and the nail rod internally comprise a communicating hollow cavity. A free end of the nail rod comprises at least two blade guide grooves. The core rod is accommodated into the hollow cavity. Each anti-rotary blade comprises a connecting rod, at least two bearings and at least two blades. Free ends of the at least two blades are respectively accommodated into the at least two blade guide grooves. The anti-rotary blades are inserted into the femoral head. Given that the anti-rotary blades are inserted into the femoral head, there is no need to have a collimation device in vitro. In this sense, installation difficulty is lowered and installation time is shortened while fixation failure of the traditional locking mode is avoided. Safety and effectiveness are improved.

The invention discloses a zero-gravity small crane which comprises a support. The support comprises a large cantilever and a small cantilever, and both the large cantilever and the small cantilever can rotate. The two groups of rotary cantilevers are adopted, the space is utilized to the maximum extent, namely the length of the whole cantilevers can be adjusted to adapt to hoisting at different distances. When not in use, the zero-gravity small crane can be folded and is convenient to store.

The invention relates to a self-locking fixed part for a surgical implant. The self-locking fixed part comprises a steel plate and a self-locking screw, wherein the self-locking screw consists of a screw rod and a screw cap, a ring-shaped groove with the end surface being similar to the V shape is arranged on the screw cap longitudinally, the screw cap is divided into an outer ring and an inner ring by the ring-shaped groove, more than two openings are arranged on the outer ring of the screw cap longitudinally, and the part with the maximum outer diameter of the screw cap is lower than the upper end surface of the screw cap; a screw hole matched with the shape of the screw cap is arranged on the steel plate, the inner diameter of an inlet of the screw hole is less than the maximum outer diameter of the of the screw cap, the maximum inner diameter of the screw hole is larger than the inner diameter of the inlet of the screw hole and less than the maximum outer diameter of the screw cap, and the inlet of the screw hole and an arc of the part with the maximum inner diameter are connected to form a laminated arc; and the self-locking screw penetrates through the screw hole arranged on the steel plate and is implanted into the steel plate for compressing and fixing the steel plate, and therefore, the part with the maximum outer diameter of the outer ring of the screw cap pushes against the laminated arc of the screw hole in a clamping way, so as to realize self locking. The self-locking fixed part has the advantages that the structure is simple, the cost is low, the processing and the production are easy, the implantation is convenient, the operation is fast, the incisura is small, and the surgery time is saved.

The invention discloses an assembly type composite sensor, and relates to the technical field of sensors. The assembly type composite sensor comprises a fixed seat, a vibration sensor, a temperature sensor and a skeleton plate, and further comprises two fixed columns and screws which are welded together, and the upper surface and the lower surface of the skeleton plate are provided with a first groove and a second groove respectively; the upper surface of the fixing base is provided with an embedding groove used for embedding the framework plate and a third groove, the groove wall of the third groove is provided with an internal thread groove used for screwing in of the screw, and the groove of the first groove is internally provided with a driving part used for driving the screw to be screwed in the internal thread groove and self-locking, and an abutting part used for abutting against the surface of the fixing column, and the abutting part is in transmission connection with the driving part. According to the invention, the screw is self-locked after being screwed into the internal thread groove, so that the reverse rotation process of the screw is limited, and the effect that the installation of the sensor is firmer and more reliable is achieved.

The invention discloses a self-locking bolt fastener which comprises a screw rod. When the fastener is used, double effects of looseness prevention and convenient disassembly can be achieved at the same time. The screw rod is locked and is prevented from being loosened through structural cooperation among a locking cover, a fastening block and a base, and when the screw rod passes through a torsional spring, the torsion spring is extruded to generate expansion deformation, and thus, the screw rod can smoothly pass through the torsion spring conveniently. When the screw rod tends to rotate in the reverse direction, namely to be screwed out, the elastic force of the torsion spring enables the torsion spring to contract, the screw rod can be prevented from further rotating in the reverse direction, and therefore the self-locking effect is achieved. When the bolt fastener is detached, it is only needed to rotate the locking cover in the reverse direction, so that a flat and straight face of an internal thread is in extrusion contact with a short ejector rod, deformation potential energy of the spring is released, sliding locking on the fastening block is relieved, then a starting end of the torsional spring is extruded inwards, the torsional spring is expanded to relieve limitation on the screw rod, the screw rod can be screwed out rapidly, so that it is convenient to disassemble and assemble the fastener.