40results about How to "Accurate and stable transmission" patented technology

The invention discloses a cleaning device for a mobile phone screen. The cleaning device comprises a frame, wherein a support is fixedly connected to the interior of the frame; a bearing sleeve is fixedly connected to the top end of the support, a rotating shaft is rotationally connected to the interior of the bearing sleeve, and a rotating button is fixedly connected to one end of the rotating shaft; and a conical gear is fixedly connected to one end of the rotating shaft, a threaded rod is fixedly connected to the interior of the conical gear in a sleeve mode, the two ends of the threaded rod are rotationally connected to bearing blocks, and the surface of the threaded rod is fixedly connected to a limiting block. According to the cleaning device for the mobile phone screen, the rotatingbutton and the conical gear are arranged, the rotating button is rotated to drive the conical gear and thus supporting plates are enabled to move up and down, the position between the supporting plates and a cleaning piece is positioned due to the fact that the thickness of the mobile phones are different, the transmission is stable and accurate, the mobile phone screens with different sizes canbe cleaned, and therefore the purpose of wide application range is achieved.

The invention provides a mining pneumatic-conveying universal joint piston type concrete spraying machine. The problems of large size and low efficiency of an existing spraying machine are solved. The mining pneumatic-conveying universal joint piston type concrete spraying machine comprises a machine frame, wherein a rotor cylinder barrel is arranged on the machine frame, a plurality of material storage channels are formed in the rotor cylinder barrel, piston modules penetrate through the material storage channels, an oblique table base is arranged under the rotor cylinder barrel, a rotating seat rotating along the oblique axis is arranged on the oblique table base, a straight gear is fixedly connected to the top face of the rotating seat, the piston modules are connected with the straight gear through a double-cross universal coupling, a spline shaft penetrates into the central position of the rotor cylinder barrel and is connected with the rotating seat through a single-cross universal coupling, and an air distribution disc is arranged above the rotor cylinder barrel and is communicated with a hopper and an air box. A power mechanism is arranged on the machine frame, the driving end of the power mechanism is connected with a bevel gear, and the bevel gear is in meshed connection with the straight gear. The mining pneumatic-conveying universal joint piston type concrete spraying machine is small in size, simple in structure, capable of saving energy and protecting environment, abrasion-resistant, low in operation cost and high in efficiency.

The invention relates to a variable-diameter hydraulic cutter for cutting sleeve pipes different in diameter through multi-start screw transmission, and the variable-diameter hydraulic cutter is used for operation of abandoned wells. The variable-diameter hydraulic cutter is characterized in that an upper connector is in threaded connection with a housing, and a nozzle is located in a mandrel and connected with the mandrel through a thread; a piston is installed at the upper end of the mandrel in a threaded connection mode, and the piston, the mandrel and a spring are put in the housing; the mandrel is provided with a spiral groove, and the mandrel and the housing are matched to form a multi-start screw pair; a worm is located on the lower portion of the mandrel and is matched with the mandrel through a spline; cutter bodies are uniformly arranged in the circumferential direction and connected with the housing through hinge pins, a worm wheel on the upper portion of the cutter bodies are meshed with the worm, and rotation of the worm and the worm wheel is achieved. Through the mandrel, linear motion is transformed into rotary motion and transferred to the worm, the worm wheel is driven to rotate, the opening angles of the cutter bodies are thus controlled, continuous cutting of the sleeve pipes different in diameter can be achieved, the number of times of tripping operation is reduced, and the sleeve pipe cutting efficiency and operation reliability in the operation of abandoned wells are largely improved.

The invention relates to the field of CNC machine tool accessories, specifically a CNC machine tool capable of lubricating a linear slide rail, including a slide rail body, a slider, a lubricating structure, a first guiding structure, a pressure relief structure, a cleaning structure and a second Guide structure; the side wall of the slider is provided with a lubricating structure for lubricating the screw rod and preliminary cleaning of dust, and a pressure relief structure is provided inside the lubricating structure, so that when the screw rod slides between the driving slider and the slide rail body , so that the lubricating structure can automatically carry out preliminary dust removal and lubricating oil on the screw rod, and at the same time cooperate with the use of the pressure relief structure, so that the bonding effect between the lubricating structure and the screw rod is better, and it is convenient to quickly lubricate the screw rod; The end of the cleaning structure passes through the second guiding structure used to guide the cleaning structure on the slide rail body, which is convenient to absorb dust and waste on the screw rod through the negative pressure vacuum of the cleaning structure. The setting of the second guiding structure makes cleaning The structural transmission is more stable, which in turn makes the cleaning effect of the screw rod better.