45results about How to "Prevent radial offset" patented technology

The invention relates to a plastic eyeglass capable of improving eccentricity and a manufacturing method thereof. The plastic eyeglass capable of improving eccentricity comprises a main body, a first rough edge and a second rough edge; the main body comprises a first surface and a second surface arranged along the optical axis, and an annular periphery face; the first surface comprises a curved surface part nearby the optical axis and a plane part encircling the curved surface part; the first rough edge is annular, is disposed at the plane part of the first surface and encircles the optical axis; and the second rough edge is annular, is disposed at the plane part of the first surface and encircles the first rough edge. The manufacturing method of the plastic eyeglass capable of improving eccentricity comprises the steps: step a, providing a mold; step b, injecting a plastic blank material into the cavity of the mold, cooling and solidifying the blank material to form the plastic eyeglass; step c, keeping the combination of different mold parts away from each other; step d, moving a pushing pipe of the mold to a first mold holder and a first mold core to push out the plastic eyeglass; and step e, taking out the plastic eyeglass. The manufacturing method aims at manufacturing the plastic eyeglass with unmigrated center.

The invention relates to a pressing tool for a large gear hob. The pressing tool comprises a base, wherein a center shaft which extends vertically upward is fixedly arranged on the base, the lower end of the center shaft is movably sleeved with a support sleeve, the upper end of the center shaft is movably sleeved with a press block, a space interval for instilling a workpiece is reserved between the support sleeve and the press block, the lower end of the support sleeve is fixed with the periphery of the base, a locating seam allowance which is used for centering the workpiece is arranged at the upper end of the support sleeve, a hydraulic nut is connected to an axial section, above the press block, of the center shaft through threads, and the hydraulic nut presses the press block. The pressing tool for the large gear hob is suitable for pressing the workpiece when the operation space is small and the hob is effectively and heavily cut, and enough clamping pressing force and clamping efficiency can be effectively guaranteed.

The invention relates to the field of movement mechanism, in particular to an all-dimensional wheel and an all-dimensional mobile platform using the same. The all-dimensional wheel comprises a hub and an integral roller assembled on the hub through a roller shaft, two ends of the roller shaft protrude out of corresponding rollers, external threads are arranged on portions protruding out of the rollers, the hub comprises a left support rotation disc, a right support rotation disc and a shaft sleeve, the left support rotation disc and the right support rotation disc are relatively arranged, the shaft sleeve is coaxially connected between the left support rotation disc and the right support rotation disc, one end of the roller shaft is inserted in an installation hole arranged on the left support rotation disc and fixed through a nut, the right support rotation disc is close to the shaft sleeve and is detachably and fixedly connected with the shaft sleeve when the roller shaft is fixed on the left support rotation disc, an abdicating hole which abdicates for the roller shaft relative to movement of the right support rotation disc in a process that the right support rotation disc is close to the shaft sleeve from right to left is arranged on the right support rotation disc, one end of the roller shaft far away from the left support rotation disc is inserted in the corresponding abdicating hole and fixed through a nut, and a problem that the all-dimensional wheel is poor in strength and prone to lose efficiency is solved.

The invention provides a lifting device which is used for lifting so as to support a lifting needle of a device. The lifting device comprises a central guide rod, a mounting flange with a hollow structure, a hollow sleeve, a corrugated pipe and at least two central guide rod limiting parts with hollow structures, wherein the first limiting part is arranged in the hollow part of the mounting flange and the outer wall of the first limiting part is in tight fit with the inner wall of the mounting flange; the second limiting part is arranged at the lower region in the hollow sleeve and the outer wall of the second limiting part is in tight fit with the inner wall of the hollow sleeve; and the central guide rod penetrates through the first limiting part, the corrugated pipe and the second limiting part in the axial direction in sequence and is in tight fit with the inner walls of the first limiting part and the second limiting part. In addition, the invention provides semiconductor device processing equipment with the lifting device. Through the lifting device and the semiconductor device processing equipment provided by the invention, radial migration of the central guide rod can be reduced, product yield and production efficiency can be increased, reliable running of the system can be guaranteed, and cost is saved.

The invention discloses a tapping device for punching a chassis. The tapping device comprises a horizontally arranged workbench, a pedestal which can linearly move to and fro and is arranged on the workbench for holding the chassis, and a punching assembly and a tapping assembly sequentially arranged along the moving direction of the pedestal, wherein the punching assembly can be used for simultaneously punching in the left side, right side and bottom surface of the chassis; the tapping assembly can be used for simultaneously tapping on the left side, right side and bottom surface of the chassis. According to the tapping device for punching the chassis, the machining efficiency of thread holes in the chassis is high.

The invention discloses a displacement and vibration monitoring device, comprising a frame, a measuring mechanism and a sensing mechanism; the frame is arranged on the object to be measured; the measuring mechanism is arranged on the frame, and can measure the displacement parameters and vibration parameters of the object to be measured. Monitoring; the sensing mechanism is arranged on the frame, and includes a telescopic assembly and a sensing element; the telescopic assembly is in contact with the measuring mechanism and can move with the action of the measuring mechanism. The technical scheme of the present invention is applied, and a combination of a measuring mechanism and a sensing mechanism is adopted, and the effect is: the threshold value of the vibration of the object to be measured is monitored by the sensing mechanism, so that the sensing mechanism controls the measuring mechanism to increase the sampling frequency of displacement, and the object to be measured can be effectively treated in real time. The displacement parameters and vibration parameters are monitored.