31results about How to "Small center of gravity offset" patented technology

The invention relates to a decoration installation structure, and provides a decoration installation structure for a greening wall aiming at the problem of reduction of stability of an installation structure caused by gravity center shift due to nonuniformity of plant growth. The structure enables plants to be rotated and makes the plants receive uniform illumination; and the technical scheme is that the structure comprises a base seat and a plurality of supporting units, each supporting unit comprises a plurality of parallel screw rods, two adjacent screw rods are connected through a connecting rod, lifting supporting members are slidably connected to the interior of each supporting unit, each supporting member is provided with a sliding member clamped on the screw rods for sliding, connecting columns are connected between two adjacent supporting members, the base seat is provided with a driving device used for driving supporting members located at the bottom to be lifted, and a maximum stroke of the driving device is greater than a screw pitch of the screw rods. According to the structure provided by the invention, in the lifting process of the supporting members, the plants aredriven to rotate, so that the plants receive uniform illumination, the plants grow uniformly, gravity center shift of the plants is reduced, gravity center shift of the installation structure is reduced, and stability of the installation structure is improved.

The invention discloses an inertial-impact-preventing liquid tank provided with cylindrical spiral tubes inside. At least one group of cylindrical spiral tubes are arranged inside the liquid tank, a liquid tank upper liquid communication position is arranged between tops of the spiral tubes and the upper inner wall of the liquid tank, and a liquid tank lower liquid communication position is arranged between bottoms of the spiral tubes and the lower inner wall of the liquid tank, so that a liquid is contained inside the spiral tubes and internal gaps of the liquid tank; tube sections of the spiral tubes are round, rectangular, triangular, hexagonal or irregular, the multiple groups of spiral tubes are horizontally and closely arranged and fixed inside the liquid tank, and the spiral tube on the outmost circle is fixed on the inner side wall of the liquid tank. According to the liquid tank, the position of the center of gravity of the liquid is stabilized by the aid of a spiral structure, the liquid inside the tank can only move along the spiral tubes due to constraint of the spiral tubes in the movement process of the liquid tank, the inertial impact of the liquid is prevented, and the shift of the center of gravity is reduced, so that movement stability and safety of means of transport are improved.

The invention discloses a composition method of a gantry-type four-dimensional automatic measuring platform for detecting the light-color performance of a display screen and the gantry-type four-dimensional automatic measurement platform using the method, which relates to the automatic measurement technology of the light-color performance of a display screen. It consists of a platform base, The gantry, the X-axis moving mechanism, the Y-axis moving mechanism, the Z-axis lifting mechanism and the rotating platform of the display screen, through the motion control circuit of each mechanism, flexibly control the light and color performance of the display screen. The four-dimensional automatic measuring platform completes the three-dimensional light and color measuring instrument. The mobile and the measured display screen rotate precisely in one dimension, with smooth movement of the light and color measuring instrument, small display screen rotation, novel structure, small driving force required, small size, light weight, low cost, fast measurement speed, and reliability advanced features. It can be widely used in LCD, LED TV screens, monitor screens, mobile phone screens and other automatic detection systems for light and color performance. Under computer management, it can intelligently adjust the coordinates of the test points and the display screen in three-dimensional directions according to the requirements of the light and color performance test of the display screen. Quickly complete the photochromatic performance inspection.

The invention discloses a backpacking type oil transportation device which comprises support rods, a backpacking frame and a bag body. The backpacking frame comprises shoulder straps, a backpacking support board and a waistband support from top to bottom, wherein, the shoulder straps, the backpacking support board and the waistband support are mutually connected. The backpacking support board is provided with a first fixing device. The waistband support is provided with a second fixing device. The bag body is provided with a third fixing device and the support rods fix the bag body on the backpacking frame through the fixing devices. A single person can shoulder the backpacking type oil transportation device to transport oil urgently to areas with inconvenient traffic.

The invention discloses a fully automatic multi-station and multi-axis numerical control CNC machining center, belonging to the technical field of numerical control machining, which includes a fixed table, and a plurality of multi-axis numerical control machine bodies arranged on the top of the fixed table. The peripheral side ring is provided with a ring table, and the turntable is rotatably connected with the ring table, and the side ring of the ring table away from the fixed table is provided with a turntable, and the top of the turntable is provided with a Matching flat-nose pliers, the bottom of the turntable is provided with a dynamic balancing mechanism. The invention provides a fully automatic multi-station multi-axis CNC machining center, which can automatically center the rotating turntable through the outer ball slidingly connected to the bottom of the turntable and the pendulum connected to the bottom of the turntable, thereby reducing the rotation process of the turntable The center of gravity shifts in the center, thereby reducing the wear and tear of the multi-axis CNC body and prolonging the service life of the multi-axis CNC body.

An optical system for an airborne perspective helmet-mounted display belongs to the technical field of optics and aims to solve the problems of complicated structure, small field angle, short exit pupil distance and small exit pupil size in the prior art. The optical system comprises an image source, a relay lens block and a combiner, which are sequentially arranged along the optical axis; images produced by the image source pass through an optical wedge, a second biconvex lens, a first biconvex lens and a concave lens to be transmitted to the combiner and then reflected by the combiner to eyes of a pilot, the combiner simultaneously transmits external environmental images, and the pilot acquires the image information and the external environmental information. The optical system utilizes a free surface and binary optical elements to resolve conflicts between the demands on both field angle and the exit pupil distance and small-sized light weight, and enables the helmet-mounted display to be more compact in structure and lighter in weight, thereby reducing wearing fatigue of the pilot and improving the fighting efficiency.

A fine adjustment method and adjustment device for the feed rate of a boring tool. When the tool tip is driven by a driving mechanism to rotate around the center of the tool handle body with an offset distance of e, the change of the tool tip relative to the tool handle body axis is realized. Diameter purpose, and obtain precise variable diameter value prompts. The device includes a handle body, which has a tapered hole whose axis deviates from the axis of the handle body; a rotating cone matched with the tapered hole, which is provided with a tapered hole; installed on the rotating cone The replaceable tool rod in the taper hole is equipped with a tool; it is installed on the tool handle body and can drive the rotating cone to rotate, and then drive the replaceable tool rod to rotate, realizing the worm gear drive of the tip micro-feeding mechanism. The invention has the advantages of good linearity and high adjustment precision, and the fine-tuning precision can easily reach 0.002 mm. The device has the advantages of simple parts, good structural rigidity, convenient operation and small center of gravity deviation, and can be used for high-speed cutting. It is suitable for various boring conditions of various boring machines, milling machines, drilling machines, machining centers and other hole processing machines.

The invention discloses an electronic device which comprises a fixed support, a first telescopic support, a second telescopic support and a flexible screen, wherein the first telescopic support and the second telescopic support are symmetrically arranged relative to the fixed support; the first end of the flexible screen is connected with the first telescopic support; the second end of the flexible screen is connected with the second telescopic support; and the first telescopic support and the second telescopic support can do telescopic motion relative to the fixed support at the same time so that the flexible screen can be switched between a retracted state and an unfolded state. According to the electronic device provided by the embodiment of the invention, the holding effect of the electronic device can be improved, and the holding comfort of a user on the electronic device is improved.

The invention discloses a novel high-voltage wire dragging support. The high-voltage wire dragging support structurally comprises an operation platform, a controller, a three-dimensional rotary lifting joint, an arm frame, a high-voltage wire, high-voltage wire guide devices, a hydraulic oil cylinder, a high-voltage wire roller, a diesel engine, a self-propelled chassis, an adjustable supporting leg, a traction support, driving wheels, a rotary table and a drive control machine body; and each high-voltage wire guide device comprises a groove, guide wheels, a high-voltage wire anti-falling support, bearing sleeves, guide wheel movable bearings and a screw rod. According to the high-voltage wire dragging support, the arm frame is arranged, the operation platform can be driven to ascend and descend through the cooperation of the hydraulic oil cylinder and the diesel engine so that potential safety hazards generated when constructors climb up and down to a transformer can be avoided, the high-voltage wire guide devices are arranged on the outer wall of the arm frame at equal intervals, the guide wheels and the high-voltage wire roller are coordinated with each other so as to quickly drag the high-voltage wire to the operation platform, the constructors can do the wiring job conveniently, working efficiency is improved, and overall safety of work is improved.

The invention relates to the technical field of storage equipment, and discloses a high-density storage storage device, comprising a shelf and a handling tower. The lower end of the frame has no bottom, and the moving support plate can extend into the interior of the inner box. The high-density storage storage device is directly stacked in the storage compartment of the shelf, and the goods are transported in a single row. Compared with the overall handling of the stacked goods, the requirements for the width of the reserved passage for the goods are greatly reduced. The floor space of the aisle is reduced, the goods are placed in a single row on the storage chassis for transportation, and the goods are also lifted in rows when they are lifted. The requirements for power equipment are lower. On the other hand, the mass of a single lift is less, the center of gravity shift caused by pushing into the rack is smaller, and the requirements for equipment counterweight are lower.