58results about How to "Guaranteed swing" patented technology

The invention discloses a corn threshing device and relates to the technical field of corn threshing. The progressive corn threshing device based on the geometric relationship of the space coordinate axis includes a body, the left side of the top of the body is provided with a material inlet, and the right side of the inner wall of the body is fixedly installed with a guide slide plate, and the bottom of the guide slide plate is provided with a A support plate, and the front and rear sides of the support plate are respectively fixedly connected with the front and rear sides of the inner wall of the body, the middle part of the top of the support plate is provided with a first rotating motor, and the output shaft of the first rotating motor is sleeved with a driving gear. The corn threshing device based on the progressive geometric relationship of the spatial coordinate axis effectively solves the problem of It solves the problem that the traditional corn thresher cannot perform relatively complete threshing of the corn kernels at both ends of the corn.

The invention provides a down lamp structure capable of rotating and swinging. The down lamp structure comprises a rear cover, a rotary base plate, a light emitting module and a swinging bracket; the rear cover comprises an accommodating chamber extending along the axial direction; the bottom of the accommodating chamber is provided with an abdicating opening at the axis position; the rotary base plate is coaxially arranged inside the accommodating chamber; one surface, facing to the bottom surface of the accommodating chamber, of the rotary base plate is provided with a rotating shaft; the rotating shaft is fixedly connected with a fixing part after passing through the abdicating opening so that the rotary base plate rotates about the axial direction of the accommodating chamber with respect to the accommodating chamber; one surface, far away from the bottom of the accommodating chamber, of the rotary base plate is connected with the swinging bracket in a swinging manner at an eccentric position and along the axial direction; the main body of the swinging bracket is arranged along the radial direction of the rotary base plate; the position coaxial to the rotating shaft is provided with a connecting part linked with the light emitting module; and the light emitting module rotates with the rotary base plate along the radial direction by virtue of the connecting part and also swings with the swinging bracket along the axial direction by virtue of the connecting part.

The invention relates to an encapsulation structure of a scanning micromirror, comprising a base, the upper end of the base is provided with a concave cavity, a printed circuit board is placed on the upper end of the base, and the middle of the printed circuit board is provided with a via hole for light to pass through, so the Two mounting holes are symmetrically arranged on the left and right sides of the via holes on the printed circuit board, magnets are respectively fixed in the mounting holes, the lower ends of the magnets are pressed against the bottom of the cavity of the base, and a scanning micromirror chip is fixed on the bottom of the cavity. The lower end face of the printed circuit board, the mirror surface of the scanning micromirror chip is located below the through hole of the printed circuit board, the upper end of the printed circuit board is provided with a cable terminal, and one end is covered on the printed circuit board. On the upper end, the printed circuit board and the magnet are pressed, and the end cover, the printed circuit board and the base are fixed together by bolts. The structure is simple and stable, the packaging is simple and fast, the packaging consistency is good, and the positioning of the two magnets is good.

The invention discloses a universal rotary dynamic sealing device and gyration equipment. The dynamic sealing device comprises a dynamic ring and a static ring, wherein the dynamic ring is fixed on a rotating part and makes gyration movement together with the rotating part; the static ring is connected with a static part through a universal rod, and the sealing surface of the static ring is attached to the sealing surface of the dynamic ring; the universal rod is composed of a bulb component and a threaded rod, the bulb end is connected with the static part, the threaded rod is connected with the static ring, springs and clamp nuts are installed on the universal rod, and the springs are tightly pressed on the static ring by the clamp nuts. The dynamic sealing device disclosed by the invention can effectively solve the problem of seal failure caused by radial runout of the rotating part and axial movement caused by thermal expansion, and has the characteristics of good sealing effect and, high-temperature resistance and the like.

The invention relates to a magnetic pendulum and simple pendulum combined experimental instrument, which belongs to the field of basic physic teaching and research instruments. The magnetic pendulum and simple pendulum combined experimental instrument comprises a base, a stand column, an angle indicating device, a simple pendulum device, a magnetic pendulum device, a laser alignment device, a photoelectric detector and the like, wherein an intelligent measuring device is arranged on one side of the base; the stand column and an air track are arranged on the base; the two ends of the air trackare provided with the laser alignment device and a correction plate; the single pendulum device is arranged at the top of the stand column; and the magnetic pendulum device and the angle indicating device are arranged in a chute of the stand column. In the experimental instrument, the single pendulum is combined together with a magnetic pendulum experimental instrument, so that two kinds of experiment can be completed by one set of instrument; and a cycloid and a pendulum rod are guaranteed to swing in one plane by adopting laser alignment positioning and pivot angle acoustic image indication, so that the measurement results are more accurate and scientific. The magnetic pendulum and simple pendulum combined experimental instrument solves the problem that the instruments occupy a lot of space because the conventional single pendulum experiment and magnetic pendulum experiment are completed by different experimental instruments, and the problem that the measuring precision of the experiment is low and cannot meet the requirements of physic teaching and researches.

A test bench, comprising: a support system (100) and a pendulum system (200) hinged to the support system (100), the pendulum system (200) comprising a pendulum rod portion (210) and a pendulum portion (220), the pendulum rod portion (210) comprising at least one first pendulum rod (211) and at least one second pendulum rod (212), a swing plane of the first pendulum rod (211) being parallel to but not coinciding with a swing plane of the second pendulum rod (212), the pendulum portion (220) comprising a large pendulum and a small pendulum, the large pendulum being connected to the bottom of the first pendulum rod (211) and the second pendulum rod (212), the small pendulum being connected to the bottom of the first pendulum rod (211) or the second pendulum rod (212). The large pendulum or the small pendulum are selected for mounting according to a test type, the large pendulum may be connected for an automobile front and rear end bumper impact test when the first pendulum rod (211) and the second pendulum rod (212) act simultaneously, and the small pendulum may be connected for a free impact test when the first pendulum rod (211) or the second pendulum rod (212) acts individually, thereby satisfying different test environment requirements.

The invention relates to the technical field of polypropylene reaction equipment, in particular to a safety valve for a polypropylene loop reactor. In the safety valve, the entrance of a valve seat is in an arc shape; a seal surface and a horizontal surface of the valve seat form an angle of 45 degrees; the entrance of a cavity is provided with a press ring; a valve clack is fixedly connected to the press ring; a press rod is arranged above the valve clack; by a structure, a medium in the loop reactor can smoothly pass through the valve seat of the safety valve and is prevented from being collected and crystallized at the entrance of the safety valve to block a pipeline; the safety valve is relieved and rapidly meets the requirement so as to ensure that the safety valve has enough relieving capability; the safety valve can still stably run in an environment of relatively high back pressure; a seal structure of the safety valve for the loop reactor is a soft seal structure, so the tightness of the safety valve is ensured under the conditions of the existence of solid particles in the medium and high pressure; and the seal structure is easy and convenient to disassemble and assemble, a failure seal ring can be simply and conveniently disassembled and replaced, and repair and maintenance are facilitated.

The invention belongs to the field of paper processing devices, and particularly discloses a paper cutting machine. The paper cutting machine comprises a paper feeding mechanism, a cutting mechanism and a collection mechanism, wherein the cutting mechanism comprises a workbench, a rack, a mounting base, a cutter and a power device; a cutting groove is formed in the upper surface of the workbench;the paper feeding unit comprises an uncoiling roller, a rotary shaft and a paper feeding roller; the paper feeding roller is fixed to the rotary shaft; the rotary shaft is provided with a ratchet wheel; the mounting base is provided with a mounting strip; a plurality of clamping jaws are hinged to the mounting strip and can be clamped to the ratchet wheel; the collection mechanism comprises a slide rail, a torsional spring, a transmission shaft, a conveying board and a collection tank; the conveying board is in sliding connection with the slide rail; a gear is fixed to the transmission shaft;a rack is arranged on the lower surface of the conveying board; one end of the torsional spring is fixed to the workbench; the other end of the torsional spring is fixed to the transmission shaft; thetransmission shaft is wound with a pull rope; and the pull rope is connected to the mounting base. When the paper cutting machine is used, the cutting quality can be ensured, burrs at notches are avoided, cut paper can be effectively collected, and pieces of paper are stacked orderly.