61results about How to "Prevent radial rotation" patented technology

The invention discloses a fixing device and a fixing method for a prism of corner cube. The fixing device comprises a clamp, an apron, a base, a lock nut and a holding screw. A hollow hole with a circum-circle diameter less than a bottom diameter of the prism of corner cube is arranged in the clamp and is used for placing the prism of corner cube. A hollow hole with an opening containing inner screw threads is arranged in the base and is used for placing the prism of corner cube and the clamp. The inner hole diameter of the lock nut is slightly less than the circum-circle diameter at the bottom of the prism of corner cube. The gap between the whole length of the hollow hole of the base and the length of the assembled prism of corner cube and clamp is less than the inner screw thread length of the base. The lock nut matches with the base through the inner and exterior screw threads and tightly locks the prism of corner cube in axial direction. The holding screw is screwed in the screw holes in the exterior wall of the base to tightly hold the clamp and prevent the clamp from rotating in the axial direction. The fixing device and a fixing method fully make use of the three orthogonal seamed edges of the prism of corner cube, adopts the three contact styles containing point contact, line contact and surface contact to realize the precisely-fixed prism of corner cube, and has the advantages of simple structure, convenient installation and detachable installation.

Methods of packaging a medical device to orient at least a portion of the medical device and a medical device packaging assembly are provided. A method includes providing an elongate holder having a lumen extending through at least a portion of the holder and providing the medical device including an elongate shaft where the shaft includes a first cross-sectional area having a rotational orientation and a second cross-sectional area having a second rotational orientation. The method further includes aligning the first and second areas so that the first and second rotational orientations are aligned along a longitudinal region of the shaft and inserting at least a portion of the medical device into the lumen of the holder Radial rotation of the first area with respect to the second area is substantially prevented.

The invention discloses a tandem fan frame module. The tandem fan frame module comprises a plurality of fan frames, a tandem buckle assembly and a radial auxiliary anti-rotating assembly, wherein the plurality of fan frames are arranged in series; the tandem buckle assembly is arranged in each fan frame and combining the fan frames; and the radial auxiliary anti-rotating assembly is arranged in each fan frame and comprises at least one limiting piece and at least one stopping piece, wherein the limiting piece and the stopping piece are respectively arranged on the jointed part of the two adjacent fan frames, and the limiting piece is propped against the stopping piece. Therefore, by matching the radial auxiliary anti-rotating assembly, the radial anti-rotating function of each fan frame is enhanced, and the integral structural strength is further promoted.

The invention discloses a hydraulic expanding sleeve type tool for gear tooth shape processing. One end of an expanding sleeve positioning basic body is fixed to a machine tool; the other end of the expanding sleeve positioning basic body is fixed to a gear positioning cover; one end, back to the expanding sleeve positioning basic body, of the gear positioning cover is provided with a gear positioning slot; the end part of the expanding sleeve positioning basic body passes through a slot bottom of the gear positioning slot, and is positioned in the gear positioning slot; one end, in the gear positioning slot, of the expanding sleeve positioning basic body is provided with an expanding sleeve in a sleeved manner; the expanding sleeve positioning basic body is fixed to one end of a hydraulic drawbar through a bolt; the other end of the hydraulic drawbar passes through a central through hole of the expanding sleeve positioning basic body, and is fixed to a hydraulic rod; the circumferential surface, which is in contact with the expanding sleeve, of the expanding sleeve positioning basic body is a slope surface A; the position, which corresponds to the slope surface A, of the expanding sleeve is provided with a slot; the slot wall of the slot is matched with the slope surface A; and the contact part of a gear and the expanding sleeve is positioned in the positioning slot. According to the invention, the hydraulic expanding sleeve type tool is used for fixing the gear, so that the gear can smoothly be subjected totooth shape processing.

A bearing fixing structure comprises a bearing arranged in a shaft tube of a pedestal. The bearing has a close fit plug connection with a shaft center. A bearing fixing shell for accommodating the bearing is arranged between the bearing and the shaft tube. The bearing closely cooperates with the bearing fixing shell. The bearing fixing shell loosely cooperates with the shaft tube. The shaft tube has a at least one radial spacing portion, and the radial spacing portion abuts the at least one lug of the bearing fixing shell to restrict the radial rotation of the bearing fixing shell. An elastic element is arranged in the shaft tube, and is positioned below the bearing fixing shell in order to provide a preload pressure for the bearing fixing shell.

The invention relates to a drainer, in particular to a lift-draw type drainage control device for kitchen and bathroom. The lift-draw type drainage control device comprises: a housing that is suitable for the installation in the drainhole of a pool; a piston slidingly matched with the housing; and a steel wire actuating device which is provided with a steel wire and a sleeving having a flexible sleeve and limited axial compression; the actuating end of the steel wire stretches into the housing and is combined with the lower part of the piston, and the controller of the steel wire actuating device is arranged outside the housing. The drainage control device is convenient for installation, and prevents blockage.

The invention provides a bicycle pipe support capable of accommodating a battery and being bent. The bicycle pipe support capable of accommodating the battery and being bent comprises a front pipe support, a rear pipe support, a bending assembly and a battery, wherein the bending assembly is used for pivoting the front pipe support and the rear pipe support; a front accommodating groove is arranged to extend inwards in the axial direction of the front pipe support; the front accommodating groove is used for accommodating a controller; a rear accommodating groove is arranged to extend inwards in the axial direction of the rear pipe support; the axial length of the front pipe support is 1/6-1/3 of the length of the rear pipe support; and the battery is accommodated within the rear accommodating groove of the rear pipe support and is electrically connected with the controller.

The invention provides a locking ring for a release bearing. The locking ring comprises a ring-shaped connecting ring, a clamping lug and a lock tongue, wherein the clamping lug extends outwards along the radial direction of the outer edge of the connecting ring, and the lock tongue is vertical to the plane with the connecting ring and axially extends; the clamping lug is clamped into a corresponding clamping groove of a sliding sleeve of the release bearing, and the lock tongue is inserted into a corresponding lock groove in a shell of the release bearing. The locking ring has the advantages of simple structure and convenient processing and can further increase the lubrication level and reduce frictional loss on the basis of effectively avoiding radially rotating among the parts of the release bearing, and thus the service life of the release bearing is prolonged.

The invention discloses a hole drilling positioning die of a top beam spring sleeve. The hole drilling positioning die comprises at least two sectional materials with U-shaped cross sections, the U-shaped sectional materials are laid in parallel and form a gap, a connecting plate is placed at the bottom of each U-shaped sectional material so that the U-shaped sectional materials can be connected together, a positioning plate is placed over each U-shaped sectional material, a supporting plate is arranged between each positioning plate and the position, at the gap, of the corresponding connecting plate to fix the positioning plate, a hole drilling positioning hole is formed in each positioning plate and is located over a center line of one single U-shaped sectional material, and U-shaped sectional material axial limiting is achieved on one sides of the U-shaped sectional materials by arranging baffles. By means of the hole drilling positioning die, the U-shaped sectional materials are arranged, so that radial rotation of the spring sleeve is prevented; the baffles are arranged for preventing axial movement of the spring sleeve, and the position of a machining hole in the spring sleeve can be effectively determined through the positioning plates above the baffles and the hole drilling positioning holes.

The invention provides a combined connection device for preventing a piston from rotating in the radial direction and moving in the axial direction. The combined connection device mainly comprises a cylinder barrel, a piston rod, a locking nut, an elastic gasket, an elastic check ring, a sealing ring, a buffer sleeve and the piston. The piston is formed by combining a piston disc A and a piston disc B. The combined connection device is characterized in that the piston is prevented from rotating in the radial direction and moving in the axial direction by means of a shaft shoulder of the piston rod, the locking nut, the elastic gasket with a protrusion, and torsional deformation of the elastic gasket. The weight of the piston is reduced without loss of strength through the hollow cylindrical piston discs provided with supporting columns; the elastic gasket, the protrusion on the elastic gasket, the shaft shoulder of the piston rod and the locking nut prevent the piston from rotating in the radial direction and moving in the axial direction; and the piston discs are prevented from impacting and colliding with each other through the buffer sleeve between the piston discs.

The invention relates to the technical field of logistics industry equipment, and particularly relates to a conical roller. The conical roller comprises an inner roller body; and the periphery of theinner roller body is sleeved with a conical outer cylinder body composed of a plurality of sections of sub-conical sleeves which are sequentially connected end to end in the axial direction of the inner roller body, wherein at least one section of sub-conical sleeve is fixed to the inner roller body through a rigid connecting piece. The conical roller is more flexible to use and good in fixing effect.

The invention relates to a pipeline part, and in particular relates to a copper plastic compound pipe. The invention provides a copper plastic compound pipe which is provided with a first open end and a second open end. The copper plastic compound pipe comprises a copper pipe layer and a plastic pipe layer positioned at the interior of the copper pipe layer, and the part, positioned at the first open end, of the plastic pipe layer radially packages the end of the copper pipe layer so as to form a package part; the radial edge of the package part forms a reentry which extends toward the second open end, and the inner wall of the reentry is fitly fixed on the outer wall of the copper pipe layer; and the inner wall of the reentry is fitly fixed on the outer wall of the copper pipe layer so as to prevent the copper pipe layer of the molded copper plastic compound pipe from shifting axially, so that the fixed effect is good, thereby preventing the leakage caused by the looseness of the copper pipe layer and the plastic pipe layer.

The invention discloses a pedal of a motorcycle. The pedal comprises a pedal rubber sleeve and a pedal support rod. The pedal rubber sleeve is fixedly connected on the pedal support rod. Two rubber sleeve limiting blocks are arranged between the pedal rubber sleeve and the pedal support rod in an obtuse-angle mode, and openings of the two rubber sleeve limiting blocks are upward. The pedal rubber sleeve is provided with a shock adsorption groove. The bottom of the shock adsorption groove is a circular arc-shaped rectangular cavity. Through design of the shock adsorption groove, a part of vibration transmitted by an engine can be absorbed and comfort of riders is improved. Meanwhile, the pedal rubber sleeve is tightly matched with the pedal support rod, and unevenness generated after assembling can be eliminated. Through design of the rubber sleeve limiting blocks, the radial rotation of the pedal rubber sleeve is effectively prevented. The pedal of the motorcycle is firm and reliable in connection, reduces maintenance cost, and improves safety performance and working efficiency.

The invention discloses a simple orthodontic indirect bonding bracket transfer device in a clinical diagnosis room, and relates to the technical field of orthodontic correction. Aiming at the problemsthat: according to traditional orthodontic indirect bonding bracket transferring devices, when a bracket is transferred and connected to a dental cast, an upper die and a lower die easily act as a block and are not easy to disassemble, change and calibrate again, the upper die and the lower die need to be opened when the bracket on the inner side of the dental cast is inspected, and thus the bracket cannot be visually displayed, the invention provides the following scheme. The device comprises a first transfer dental cast, a second transfer dental cast and a cylinder bridge, and a cylindricalknob is rotatably connected to the inner middle of the cylinder bridge. According to the invention, through the design of the cylinder bridge and related structures in the cylinder bridge, the connecting installation and rapid disassembly between the first transfer dental cast and the second transfer dental cast are conveniently realized, the first transfer dental cast and the second transfer dental cast can be rotationally adjusted to be in an open state, the first transfer dental cast and the second transfer dental cast in the open state are fixed, and the bracket bonding effect can be conveniently and visually displayed.

The invention discloses a brushless motor. The brushless motor comprises a stator assembly, a rotor assembly and a fan blade, wherein the rotor assembly is arranged in the stator assembly, the fan blade is fixed on a shaft core of the rotor assembly, a straight-line knurling part is formed on the shaft core, and a through hole of the fan blade is in interference fit with the straight-line knurlingpart so that the fan blade is fixed on the shaft core. Compared with the prior art, the straight-line knurling part is formed on the shaft core of the brushless motor, and the through hole of the fanblade is in interference fit with the straight-line knurling part so that the fan blade is fixed on the shaft core; by interference fit of the fan blade and the straight-line knurling part, radial rotation of the fan blade can be prevented, axial displacement of the fan blade can be effectively prevented, so that the fan blade is prevented from falling off from the shaft core, and the working stability of the motor is improved.

The invention discloses a non-bottom-beam frame for commercial vehicle liquefied gas bottles, and relates to the field of commercial vehicles. The non-bottom-beam frame for the commercial vehicle liquefied gas bottles comprises two saddles and pull belt assemblies correspondingly and detachably connected to the two saddles, wherein an upper cross beam and a lower cross beam which are parallel to each other are correspondingly connected between the two saddles through self-locking bolts and self-locking nuts, and detachable outer arc plates are correspondingly arranged on the outer side walls of the saddles; the shapes of the upper end faces of the saddles and the outer arc plates are matched with the external diameters of the liquefied gas bottles and are positioned on the same circular arc surface, and a symmetrical anti-rotation bracket is further arranged on the middle part of the outer side wall of one of the saddles; and ventral plates are correspondingly fixed to the inner side walls of the two saddles in a riveted mode. According to the non-bottom-beam frame for the commercial vehicle liquefied gas bottles, the problems of welding deformation of the frame, difficult disassembly and assembly and radial rotation and axial movement of the liquefied gas bottles occurring in the vehicle driving process are solved, the weight and production costs of products are further reduced by more than 30%, and the non-bottom-beam frame for the commercial vehicle liquefied gas bottles has great significance for popularization.

The invention relates to the technical field of industrial components, in particular to a novel sealing element which comprises a first shell and a second shell. An annular sealing body is arranged between the first shell and the second shell, at least six convex ribs are respectively arranged on the upper surface and the lower surface of the annular sealing body, the convex ribs and the annular sealing body are integrally formed, and annular covers are arranged at the edges of the upper surface and the lower surface of the annular sealing body. The novel sealing element has the advantages that the convex ribs and the annular covers are arranged on the upper surface and the lower surface of the annular sealing body, deformation amplitude can be enlarged, radial friction can be intensified, accordingly, radial rotation can be prevented, and excellent sealing effects can be realized.