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70results about How to "Avoid trembling" patented technology

Thin-walled cylindrical part end face machining fixture

The invention discloses a thin-walled cylindrical part end face machining fixture which comprises a bottom plate. Parallel supporting seats are fixed onto the bottom plate through bottom plate taper pins and bottom plate screws, a connecting ring is hinged to one side of the upper end face of each supporting seat, a pin is arranged on the other side of the upper end face of each supporting seat, each connecting ring is connected with the side wall of a pressing cover through a pressing cover taper pin and a pressing cover screw, hinged bolts sleeve the pins, the pressing covers are pressed on the supporting seats through locking nuts on the hinged bolts, and a lower positioning sleeve and an upper positioning sleeve are fixed into grooves formed by the supporting seats and the pressing covers through screws respectively and combined to form a continuous cylindrical positioning sleeve. A thin-walled cylindrical part is radially positioned by the upper positioning sleeve and the lower positioning sleeve which are parallel, the thin-walled cylindrical part is axially positioned by positioning blocks on the side walls of the supporting seats, the thin-walled cylindrical part end face machining fixture is convenient in clamping operation, high in efficiency and convenient to detach, maintain and replace, shaking of a workpiece to be machined in the machining process is avoided, and rejection rate is reduced.
Owner:CHINA NTAIONAL NUCLEAR TIANJIN MACHINERY

Portable automatic feeding manual pile driving equipment and pile driving method

The invention relates to portable automatic feeding manual pile driving equipment and a pile driving method. The pile driving equipment comprises a pile driving mechanism, a water tank, a rack and an emptying device, wherein the pile driving mechanism, the water tank and the emptying device are arranged above the rack; the pile driving mechanism comprises a compressive bar, a support supporting the compressive bar, a first connecting rod connected with the compressive bar, a rocker connected with the first connecting rod, a second connecting rod connected with the rocker, and a drop bar connected with the second connecting rod; the emptying device comprises a charging barrel, an emptying hole, a timber pile ramp pan and a locating pipe; the timber pile ramp pan and the locating pipe are arranged below the rack; the timber pile ramp pan is positioned between the locating pipe and the emptying hole; the locating pipe is positioned right below the drop bar. The portable automatic feeding manual pile driving equipment, disclosed by the invention, is pile driving equipment which has the advantages of capability of automatically placing a timber pile, high pile driving quality, convenience in use, small volume and high safety factor, and is suitable for pile driving with small pile driving workload.
Owner:QINGDAO UNIV OF SCI & TECH

Non-contact type conveyor plate having a suction force

Disclosed is a non-contact type conveyor plate having a suction force, capable of conveying glass sheets while generating a small amount of suction force to prevent even small vibrations of the glass sheets while being conveyed and of providing an excellent wear-resistant, anti-static upper plate coming into contact with a glass sheet. A conveyor plate according to the present invention comprises: a lower plate having a chamber formed therein; a middle plate overlaid on the top surface of the lower plate and having a multiplicity of joint holes communicating with the chamber; an upper plate overlaid on the top surface of the middle plate and having air eject holes communicating with the joint holes; and air eject bolts insertedly fixed into the air eject holes to accommodate air from the chamber and guide the air into a gap between the bolts and the air eject holes. Here, on the top end of the air eject hole is formed a head to allow the air to be ejected in an oblique upward direction, and on the top surface of the air eject hole is formed a hollow cavity to produce vacuum by a difference in atmospheric pressure. Moreover, the bottom surface of the head preferably forms an inclined plane in the oblique upward direction, and the top end of the air vent hole is preferably rounded. A multiplicity of vent holes may also be provided to vent air from the top surface of the upper plate to the bottom surface of the lower plate. Further, the upper plate is made from GUR (PE-UHMW) to improve wear-resistance and prevent static buildup.
Owner:李在成

Vein blood sampling catheter

The invention provides a vein blood sampling catheter which comprises a catheter body, a connecting base, an extension tube, a sliding buckle and an extension tube connector. The rear end of the catheter body is connected with one end of the extension tube through the connecting base, and the other end of the extension tube is connected with the extension tube connector. Two side holes communicated with the catheter body are formed in the side face of a front end catheter opening of the catheter body and located in the two opposite side walls of the catheter body respectively. The diameter of each side hole is 1/3-2/3 of the opening diameter of the catheter body. The distance between the two side holes is 3-8 mm. The side hole close to the catheter opening is distanced from the rear portion of the catheter opening by 5-10 mm. A straight single-cavity catheter is adopted as the catheter body, and the range of the opening diameter of the catheter is 1.40-2.70 mm. The side holes are formed in the front end of the catheter body, the opening diameter for blood sampling is relatively increased through the side holes, the blood sampling speed is increased, fibrous protein sheaths do not form easily, and the problem that the blood sampling speed is difficult to increase or the catheter is difficult to place is solved.
Owner:GUANGZHOU MUNICIPAL ZHONGWEI BIOTECH CO LTD +1

Turning and milling machining clamp for aero-engine exhaust nozzle assembly

The invention discloses a turning and milling machining clamp for an aero-engine exhaust nozzle assembly, and belongs to the technical field of aero-engine part manufacturing. The turning and milling machining clamp for the aero-engine exhaust nozzle assembly comprises a base, an outer limiting assembly, a bottom inner limiting assembly, a supporting assembly and a top limiting assembly. The base of the clamp is used for bearing all assemblies and the aero-engine exhaust nozzle assembly, the bottom outer limiting assembly and the bottom inner limiting assembly are in cooperation, and therefore a metal plate barrel is clamped and positioned from the inner side and the outer side; and supporting columns are used for lifting a supporting plate, the supporting plate is used for bearing the top limiting assembly, and the top limiting assembly makes contact with the inner wall of a flange above the metal plate barrel so as to tightly jack the inner wall of the flange. An outer pressing assembly makes contact with a boss on the side wall of the metal plate barrel, and therefore the metal plate barrel is pressed, the metal plate barrel and the flange welded to the upper portion of the metal plate barrel are in a stable state, and the problems of loosening, displacement and vibration in the machining process are avoided.
Owner:AECC AERO SCI & TECH CO LTD

Cloud platform handheld frame with high stability

The invention discloses a cloud platform handheld frame with high stability. The cloud platform handheld frame comprises a handle body; a rotating shaft is arranged at the upper end of the handle body, a supporting table is horizontally arranged on the rotating shaft, and the midpoint position of the left edge of the lower end face of the supporting table is movably connected to the upper end of the rotating shaft through a hinge; a telescopic rod is horizontally arranged at the left portion of the lower end of the handle body, and the right end of the telescopic rod is movably connected withthe lower end of the handle body through the hinge; the left end of the telescopic rod is horizontally connected with a connecting rod in a hinged mode, and the connecting rod is perpendicular to thetelescopic rod; and the front and back ends of the connecting rod are horizontally and fixedly connected with shoulder plates. According to the cloud platform handheld frame, the shoulder plates at the two ends of the connecting rod hinged to the telescopic end head of the telescopic rod are erected on the shoulders, a movable clamping plate and a fixed clamping plate are opened along second sliding ways on the lower end faces of the shoulder plates, during the process, a second pulley slides and compresses a second spring, then the movable clamping plate and the fixed clamping plate clamp theshoulders, the second spring produces resilience force, so that the movable clamping plate is propped against the shoulders, and shaking is avoided by holding the handle body through the hands alonefor launching.
Owner:程梦轩

Rolling process method for nuclear power station nuclear main pump long shaft sleeve

The invention relates to a rolling process method for a nuclear power station nuclear main pump long shaft sleeve. According to the rolling process method for the nuclear power station nuclear main pump long shaft sleeve, an inner support (1) and an outer support (2) are installed to an inner hole step (14) of the long shaft sleeve (4) after being assembled together through bolts (3), the inner support (1) is made to slide to the bottom face of the outer support (2) on a contacted inclined plane (13) through clockwise rotation of the bolts (3), the outer support (2) is evenly distributed with12 openings (15) to make the outer support (2) be tightly supported outwards, and the outer support (2) is supported at the inner hole step (14) of the long shaft sleeve (4). By means of the rolling process method for the nuclear power station nuclear main pump long shaft sleeve, the situation that a jacking tip is subjected to force to cause tool core shaft deformation and cause long shaft sleeve(4) deformation can be avoided, three-segment supporting forms powerful supporting on an inner hole of the long shaft sleeve (4), the long shaft sleeve (4) deformation will not be generated in rolling, and generated long shaft sleeve (4) shaking can be effectively avoided.
Owner:HARBIN ELECTRIC POWER EQUIP
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