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2134 results about "Locknut" patented technology

A locknut, also known as a lock nut, locking nut, self-locking nut, prevailing torque nut, stiff nut or elastic stop nut, is a nut that resists loosening under vibrations and torque. Elastic stop nuts and prevailing torque nuts are of the particular type where some portion of the nut deforms elastically to provide a locking action. The first type used fiber instead of nylon and was invented in 1931.

Combined type thin-gauge skin moulding surface trimming cut flexibility multi-supporting equipment

The invention relates to a combination flexible multipoint support device with skin and trimming, which consists of a plurality of positioning plates and a plurality of adjusting components; the positioning plates is flat T-shape and a threaded hole and a matching surface are arranged on the positioning plates; the adjusting components consist of a basioccipital and a nail height adjusting unit; the adjusting components are put in parallel in an X direction and the interval between centers is fixed; the positioning plates are divided into two symmetrical rows in a Y direction; each positioning plate is connected with the same end of two adjacent adjusting components; the basioccipital shapes like a rectangular and locating holes, a threaded hole and a matching surface are arranged on the basioccipital; the locating holes are evenly distributed in a line on the basioccipital and the nail height adjusting unit is fixed in the locating holes; the nail height adjusting unit consists of a large double-screw bolt, a bolt, a locknut, a rotary nail, a replaceable nail sleeve, a joint cylinder, a universal device, a vacuum generator and a vacuum chuck. The device of the invention realizes flexible holding, reduces special clamping devices and frocks and has remarkable economic and time benefits.

Main shaft device for numerical controlled gear hobbing machine

The invention discloses a main shaft device for a numerical controlled gear hobbing machine. The main shaft device comprises a cutter bar assembly, a cutter bar assembly clamping mechanism and a cutter changing mechanism, wherein the cutter bar assembly comprises a cutter bar, a hobbing cutter, a cutter regulating pad, an axle sleeve, a locking nut and a cutter bar blind rivet; the cutter bar assembly clamping mechanism consists of a square key and a claw assembly; and the cutter changing mechanism consists of a pull rod, a piston rod, a disc-shaped spring, a hydro-cylinder body, a flange plate, a bracket, a rotary joint and a spacing switch. The main shaft device has the advantages that: a hydrostatic bearing is arranged in the main shaft structure of the high-accuracy numerical controlled gear hobbing machine, so the main shaft device can constantly work under a heavy-load cutting condition; a main shaft has high accuracy and good accuracy retaining ability; and the cutter bar assembly with the hobbing cutter is arranged and set outside a machine in a cutter workshop; the cutter bar assembly is subjected to whole cutter changing on the gear hobbing machine; and the setting assisting time of the hobbing cutter does not occupy the total part machining time of a machine tool, so the whole machine tool has high working efficiency.

Load positioning device for structural test

InactiveCN102809508AAchieve regulationSimple and convenient adjustment stepsStrength propertiesLocknutEngineering
The invention discloses a load positioning device for a structural test. The device consists of a positioning block, a bottom plate, retaining blocks, an anti-overturn screw, adjusting screws and locknuts. The device is connected and fixed with a steel member or a steel embedded piece of a concrete member through the bottom plate; the positioning block is connected with a jack, is arranged in an area enclosed by the retaining blocks of the surface of the bottom plate, and moves longitudinally and transversely by screwing the adjusting screws; the anti-overturn screw passes through slots on the transverse retaining blocks, and then is anchored into a threaded hole which is formed on the side surfaces of the positioning block so as to prevent the positioning block from being separated from the bottom plate, so that the positioning device is applicable to vertical loading working conditions, and can also be applied to horizontal loading working conditions; scale marks are marked on the upper surface of the bottom plate, and are used for improving the adjusting speed and the adjusting accuracy; and the quantity of the longitudinal adjusting screws is increased and decreased according to the displacement adjustment range. The whole device has a clear principle, can be simply manufactured, is convenient to use, is high in load positioning accuracy, and can be applied to civil engineering teaching and scientific research tests.

Jet Hammer

An exemplary embodiment of the jet hammer includes an outer sleeve, impact assembly, and a valve assembly. The impact assembly is positioned in sliding relation to the outer sleeve to provide the impact of the jet hammer. The valve assembly generally comprises a cap screw, adjustment sleeve, valve port, inner compression spring, outer compression spring, and lock nut. The inner compression spring is relatively less compressible than the outer compression spring. In operation, fluid enters the valve assembly and acts on the compression springs forming an operational seal between the valve assembly and the impact assembly. In response, the outer sleeve is slidingly displaced from the impact assembly thereby compressing a main compression spring positioned along the mandrel shaft. Once the pressure acting on the valve assembly is released, the main compression spring decompresses forcefully causing the outer sleeve to impact a connection port, bit, tool, or other member attached to the upper end of the mandrel. This impact is translated onto the obstruction or item to be struck. The impact assembly may also be capable of rotational movement with respect to the outer sleeve wherein the mandrel shaft may contain at least one rotation nozzle thereon. The rotation nozzles allow for fluid communication from the mandrel's internal bore, through the nozzles, and against the proximate inner wall of the outer sleeve. This interaction causes the mandrel, and by connection the connection port, bit, tubing, or tool attached thereto, to rotate during the downward stroke of the hammer. Rotation nozzles may be located on the connection port and/or bit for additional rotational force.

Special fixture for processing outer circle of long-cylinder part

ActiveCN103252515ANo radial movementEasy to adjustExpansion mandrelsSet screwRadial motion
The invention relates to a machining fixture, and discloses a special fixture for processing an outer circle of a long-cylinder part. Guide sleeves, taper sleeves and lock nuts are mounted at the two ends of a central spindle of the special fixture symmetrically and sequentially from inside to outside; the guide sleeves are in large-small end structures; the small ends of the guide sleeves are fixed with the central spindle by set screws; through holes are formed in casings at the large ends of the guide sleeves; ejection blocks are arranged in the through holes; cambered surfaces and grooves are arranged and formed at the outer ends of the ejection blocks; taper surfaces are arranged at the inner ends of the ejection blocks; cones of the taper sleeves eject the taper surfaces of the ejection blocks; and annular springs are mounted around the grooves of the ejection blocks. According to the special fixture, radial ejection block ejecting workpieces are added on the basis of axial clamping; radial motion during the processing of the outer circles of the workpieces is avoided; the centering precision is high; with the adoption of the matched design of the guide sleeves and the taper sleeves, and added shaft sleeves, centering clamping can be adjusted conveniently according to the length and an inner hole of the long-cylinder part; and the generality of the tool fixture for processing the outer circle of the long-cylinder part is improved.

Barrel-type friction-changing damper

InactiveCN101216088AEasy to adjustIncrease output tonnageFriction dampersPositive pressureControl theory
The invention relates to a cylinder-type variable friction damper, and can be used for building structure damping control and locomotive damping. The invention comprises an outer sleeve, a first friction sleeve, a second friction sleeve, a sliding axle, a disk spring, a locknut, an extrusion cone ring and a friction slip. An inner sleeve comprises the second friction sleeve and the first friction sleeves arranged on both ends of the second friction sleeve. The inside diameters of the first friction sleeve and the second friction sleeve are arranged on the same cylindrical surface. A left end plate and a right end plate having a hinge are permanently connected on the left end and the right end of the inner sleeve and the outer sleeve. During the deformation course of the cylinder-type variable friction damper, the area of the contact face which actually provides the frictional resistance varies with the deformation of the damper; the positive pressure on the complete contact face is kept unchanged. In this way, the friction is variable. The damper has the characteristic of linear damping. The capability of dissipation of energy increases with the increase of the deformation amplitude. When the invention is used for damping control of building structures, the invention can meet the requirement for damping under strong vibration and weak vibration, and has high practical application value.
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