122results about How to "Lighten the counterweight" patented technology

A stand, in particular a floor stand, having an arm for holding an object, in particular an imaging device in the form of an ultrasound transducer, said arm being mounted on a vertical column and movable vertically via a vertical guide, wherein a counterweight balancing the weight of the arm is provided on or in the vertical column, a device (24) being provided for moving the counterweight (21) counter to the weight force (F_G) for at least partially overriding the counterbalance.

The invention discloses a robotic planetary polishing unit for polishing of large-diameter aspheric surfaces. The robotic planetary polishing unit comprises a revolution drive mechanism, an autorotation drive mechanism, a polishing shaft component and a counterweight eccentric regulator. Two servo motors drive the robotic planetary polishing unit to autorotate and revolve respectively. The revolution drive mechanism allows horizontal revolution of planetary motion. The counterweight eccentric regulator is an eccentric regulation and synchronous center-of-mass balancing mechanism, allowing a counterweight to reversely synchronously change with an eccentric distance. The autorotation drive mechanism employs two-stage belt drive, allows an auto-rotating motor to be fixed and allows transmission of autorotation motion at the premise of not performing horizontal rotation. The polishing shaft component is in a hollow combination of a low-friction cylinder and a female rotary ball-and-spline shaft, allowing the cylinder and a piston not to perform autorotation motion. The hollow structure allows a dynamic and static polishing process. The pressure of a polishing disc is precisely controlled by a proportional valve through reduction in the friction.

A gear-rack type oil sucker consists of a frame, a gear and a rack, pulleys, a reciprocal frame for weight, and a controller. The reciprocal frame for weight consisting of a motor, a speed reducer, a brake and guide pulleys, is installed on the rack railing. A steel rope is connected with polish rod via the pulleys and rope-suspending device. The speed reducer has an output gear installed on the said frame to engage with the rack railing. The motor is connected with controller via its electric cables. The pulleys are arranged on the frame top. The oil sucker has simple and compact structure, strong bearing capacity, efficient transmission, long service life, and is reliable and easy in use, installation and maintenance, substitute as upgraded products.

The invention relates to an upward-stacking and downward-hanging combined loading static load pile test device, wherein a steel structure bracket of a main beam is arranged on the ground at two sides of a foundation pile; two ends of the main beam are arranged on the steel structure bracket of the main beam; a jack is placed between the main beam and the foundation pile; a secondary beam is arranged on the main beam along a direction vertical to the main beam, and the secondary beam and the main beam form a ballast platform; an upward-stacking steel structure load reinforcing box is arranged on the secondary beam, and a secondary beam support saddle which also serves as a lower load box and another lower load box are hung downwards on two sides of the secondary beam along the width direction of the secondary beam through connecting pieces; a square reinforcing baffle or a reinforcing baffle with the shape like a Chinese character 'jing' is positioned and fixed in the upward-stacking steel structure load reinforcing box; and the side wall of the jack close to the lower load boxes is provided with a displacement sensor for measuring the settling amount of the foundation pile. The upward-stacking and downward-hanging combined loading static load pile test device adopts lifting equipment to add counterweight materials into the upward-stacking steel structure load reinforcing box, and the upward-stacking steel structure load reinforcing box is lifted off once when a static load pile test is finished. The upward-stacking and downward-hanging combined loading static load pile test device has the advantages of safe and fast construction, mechanical lifting, high efficiency, and labor and cost conservation.

The invention provides a combination type garbage can. The combination type garbage can comprises a garbage can shell, a garbage can inner barrel and a cover plate, wherein the garbage can shell comprises a shell body, a garbage feeding opening and a first opening are formed in the shell body, and a herringbone cover plate group is arranged at the part of the garbage feeding opening; the size of the cover plate is matched with that of the first opening, and a boss and a clamping part are arranged on the cover plate; and a second opening and a U-shaped clamp are arranged on the garbage can inner barrel. By applying the technical scheme, the integral structure is simple. By adopting the combination design of the garbage can shell and the garbage can inner barrel, the garbage can shell is always kept clean and tidy, and the garbage can inner barrel can meet garbage storing requirements, so that the practicability is strong. The design objective of the cover plate is to seal the first opening, and the clamping part arranged on the cover plate is clamped by a manipulator to take the garbage can inner barrel out of the garbage can shell and restore the garbage can inner barrel in the original position. The operation is convenient, and fixed-point placing requirements are met.

The invention discloses a self-lubrication sealing structure for a gear box. The self-lubrication sealing structure for the gear box is used on a rail transit line maintaining operation vehicle. The self-lubrication sealing structure for the gear box comprises a box body, a first bearing pedestal, a second bearing pedestal, a sealing ring, a sealing cover, a sliding sleeve, a framework oil seal, a first supporting bearing, a second supporting bearing and a gear shaft. The portions, above the first bearing pedestal and the second bearing pedestal, of the two inner side walls of the box body are provided with a first oil collecting groove and a second oil collecting groove respectively. The bottom of the first bearing pedestal and the bottom of the second bearing pedestal are fixedly connected with a first oil pool and a second oil pool respectively, and a non-contact type labyrinth sealing structure formed by combining two axial gap seals, an axial gap sealing annular groove and a radial oil swing flange, and an oil collecting lubrication structure are formed. The self-lubrication sealing structure for the gear box is compact in arrangement, simple in structure and capable of meeting the requirements of high-speed and low-speed operating conditions of the rail transit line maintaining operation vehicle at the same time.

The invention discloses a front fork and portal double-folding device capable of moving forwards and backwards. The front fork and portal double-folding device capable of moving forwards and backwards is characterized in that the device comprises a pallet fork, an inner portal, an outer portal and a guide rail forklift frame; the pallet fork comprises a front fork and a pallet fork carrier; the front fork is rotatably connected with the pallet fork carrier; the inner portal and the outer portal are slidably connected in a matched mode, the inner portal and the outer portal are vertically arranged, and the inner portal and the outer portal can rotate around the lower portion of the outer portal; the guide rail forklift frame is horizontally arranged, and the outer portal and the guide rail forklift frame are slidably connected in a matched mode; and the pallet fork carrier is arranged on the inner portal, and the pallet fork carrier is slidably connected with the inner portal in a matched mode through a lifting assembly. According to a forklift provided with the device, forklift transportation is slightly limited, the weight of the whole forklift is low, and the using cost and transportation cost are low.

The invention belongs to the technical field of precision mechanical transmission, and particularly relates to a two-shaft two-frame photoelectric stabilization platform based on steel wire rope transmission. The platform comprises an azimuth assembly, a U-shaped frame assembly and a pitching assembly, wherein a steel wire rope is wound around a driving wheel and a driven wheel in an 8-shaped manner in the azimuth assembly and the pitching assembly, the driving wheel rotates to drive the steel wire rope to move, the steel wire rope pulls the driven wheel to rotate, and then the limited angularrotation of the azimuth and the pitching of the platform is realized. The two-shaft two-frame stabilization platform adopts a torque direct drive motor + steel wire rope transmission mode, and has the characteristics of high transmission precision and transmission rigidity, simple structure, convenient disassembly and assembly, low machining cost, and easy platform light quantization and miniaturization. The problem that the size and weight of the platform is large when a traditional two-shaft two-frame platform adopt moment direct drive, or the problem of low backlash transmission rigidity of the platform during gear reduction driving is solved.

The invention relates to an electric power engineering pipeline connection construction method and a fuse machine for construction. The fuse machine for electric power engineering pipeline connectionconstruction comprises a fuse machine body, a main bearing device and an auxiliary bearing device, wherein the main bearing device and the auxiliary bearing device are arranged on the two sides of thefuse machine body correspondingly; and the main bearing device and the auxiliary bearing device comprise main bases and auxiliary bases, the auxiliary bases are arranged close to the fuse machine body, brackets are arranged on the auxiliary bases, feeding mechanisms used for driving electric power pipelines to advance in the arrangement direction of the main bases and the auxiliary bases are arranged on the main bases, and an overturning mechanism used for driving the electric power pipelines to rotate around the axial direction of the main base in the main bearing device is further arrangedon the main base in the main bearing device. According to the electric power engineering pipeline connection construction method and the fuse machine for construction, the overturning mechanism drivesthe short electric power pipeline to rotate on the main bases and the auxiliary bases to enable the end part of the electric power pipeline to be matched with the other electric power pipeline, so that the problem of inaccurate butt joint caused by local bending due to the dead weight of the electric power pipelines is effectively avoided, the matching accuracy of the two electric power pipelinesis improved, and the construction efficiency is improved.

The invention discloses a method of acquiring magnetic field driving force and residue power, a magnetic power machine, a magnetic press machine and the like. Magnetomotive force is used for setting the magnetic power machine and the magnetic press machine, and magnetic discs of fixed driving mechanisms and magnetic discs of motion driving mechanisms are arranged in a front parallelism mode. Polarities of one ends of magnetic fields between the center magnetic disc and the magnetic disc of two outer ends are same, and polarities of the other ends are different and corresponding. Magnetic field polarity changing servosystem is used for driving the controlled magnetic discs to conduct the above magnetic field polarity status switching, and driving the motion driving mechanisms to move repeatedly to work to produce driving force or pressure, and work is larger than energy consumption such as magnetic field polarity changing to have residue power. The driving force can be used as power source or used for changing into electrical energy and heat energy, and the problems that existing energy consumption power devices have high energy consumption cost and pollute environment are solved. Compared with the prior art, the method of acquiring the magnetic field driving force and the residue power, the magnetic power machine and the magnetic press machine have the advantages of being high in magnetic energy efficiency use ratio, stronger in driving force, high in residue power rate, low in unit energy acquiring cost, strong in application, and extensive in uses and the like.

The invention provides a spacecraft orbit maneuver motor installing parameter optimizing method based on a Runge-Kutta algorithm. According to the method, firstly, each coordinate system is defined; then, a mathematical model between undetermined coefficients and a vector from a theoretical circular center A of a motor installing flange to a theoretical circular center C of the motor installing flange is built; a vector from the circle center A to a target point T, a vector from O<s> to the circle center A, a motor thrust vector F<EB>, an acting point position vector, a vector from the circle center A to the target point T, a vector from the circle center A to the motor thrust vector acting point P, a motor thrust vector and a vector from the motor thrust vector acting point P to the target point T are sequentially calculated; and after the undetermined coefficients are solved, the installing angle and the installing position are obtained. The method has the advantages that the optimum design mathematical model is built; and on the premise that a solution meets the constraint condition, the optimum values of motor installing parameters meet the requirements of the spacecraft orbit maneuver motor installing parameter optimization to the maximum degree.

The invention provides a direct driving type poly cycle multiple-well oil pumping unit which comprises a master bracket, branch brackets, a soft rope, a polished rod eye, a low-speed large torque counter-rotating frequency modulation motor, a speed reducer, a dynamic roller wheel on the mater bracket, a balancing weight, a suspending weight roller wheel on the master bracket, dynamic roller wheels on the branch brackets, and suspending weight roller wheels on the branch brackets. The power is transferred to each branch bracket through the soft rope, the frequency modulation motor is provided to directly drive the swing in positive and negative directions for oil pumping, the suspending weight of each pumping unit is used for mutual balance, and one oil pumping unit can carry out oil extraction for a plurality of pumping units simultaneously, thus achieving the aim of saving energy.

The invention relates to the field of musical instruments, in particular to an improved photoelectric keyboard device for playing. The improved photoelectric keyboard device comprises keys, front blocks, front block wool rings, black and white keys, positioning pins, middle blocks, middle wool rings, middle block pins, back blocks, back block wool bars, key pressing stop levers, balancing weights, light-blocking sheets, limiting nails, buffering felts, printed circuit boards, a power supply, infrared emitting diodes, infrared receiving diodes and a plastic shell, wherein a keyboard consists of the keys, the front blocks, the black and white keys, the positioning pins, the middle blocks, middle circular pins, the key pressing stop levers, brackets, the back blocks, the balancing weights and the circuit boards; one side, which is opposite to each front block, of the right side of the keyboard middle blocks is provided with an elastic rubber bar which is approximately L-shaped; the shorter edge of the upper part of each L shape is close to the bottom surface of the central position of each key; the light-blocking sheets are arranged on the bottom surfaces of the left parts of the keys close to the back blocks. Compared with the prior art, the improved photoelectric keyboard device has the advantages that one infrared emitting diode and two infrared receiving diodes construct a photoelectric coupling circuit, so that balanced strength reaction, low cost and easiness is assembling are realized.

The invention discloses an express delivery unmanned aerial vehicle in rainy day, including the body, Waterproof cover and motor, the bottom end of the body is provided with an organic frame, A machine frame is fixedly connected with that machine body, A connecting rod is arranged below the left end of the body, A link rod is fixedly connected with that body, the left end of the connecting rod isprovided with a flying blade, Place the courier items in a sealed box, Express items can be prevented from getting wet by rain, Waterproof coatings are applied to the UAV enclosures, the waterproofingperformance of the unmanned aerial vehicle can be effectively increased, ensure that it can be dispensed and used normally in the rain, and the counterweight of the UAV is reduced. The steering geararranged outside the motor can make the UAV adjust the running angle of the flying blade in time in wind and rain, reduce the influence of the airflow on the flight of the UAV, reduce the probabilityof damage caused by the UAV falling, and reduce the use cost of the express UAV.

The invention discloses a power transmission case comprising a case body, an input shaft, an output shaft, a driving gear, a driven gear, a shift clutch, a toggle mechanism and a hydraulic motor. The case body comprises left case body and a right case body, subdivision surfaces of the left case body and the right case body are vertical planes, a bearing seat and an internal spline are arranged in a gear hole of the driving gear, two ball bearings are mounted in the bearing seat, the input shaft is provided with an external spline, the shift clutch is composed of a shift meshing sleeve, a meshing sleeve positioning mechanism and the internal spline of the driving gear, the meshing sleeve positioning mechanism is mounted on the input shaft, the shift meshing sleeve is provided with an internal spline and an external spline, the internal spline of the shift meshing sleeve is meshed with and in axial sliding fit with the external spline of the input shaft, the external spline of the shift meshing sleeve can be meshed with or separated from the internal spline of the driving gear, and the toggle mechanism comprises a toggle cylinder, a fork pull rod and a fork. The power transmission case is simple and reasonable in structure and easy to manufacture, the requirements for high-speed running and low-constant speed operating, running and driving of a rapid multifunctional operating vehicle are met.

The invention relates to a belt conveyor, which comprises a driving roller, a diverted roller, a conveyor belt, a drive device and a tension device. The tension device comprises a movable bracket, fixed pedestals arranged behind the movable bracket and two sides of the movable bracket, a first diverted pulley and a second diverted pulley which are arranged on the fixed pedestals and positioned on the two sides of the moveable bracket, a first movable pulley and a second movable pulley which are arranged on the rear end face of the movable bracket, a first fixed pulley and a second fixed pulley which are arranged on the fixed pedestals, and a first rope and a second rope. A first end of the first rope is fixed on the fixed pedestal, while a second end sequentially rounds the first movable pulley, the first fixed pulley and the first diverted pulley and is connected with a balance weight; and a first end of the second rope is fixed on the fixed pedestal, while the second end sequentially rounds the second movable pulley, the second fixed pulley and the second diverted pulley and is connected with the balance weight. The tension device of the belt conveyor has the advantages of wide tension range, stability, small occupied space, simple structure, reliability and convenient maintenance, reduced weight of the balance weight and small rope stress.

The invention discloses a saline-alkali soil rice planting method. A pesticide stirring barrel is mounted at the top end of a fixed mounting plate, a water-fertilizer stirring barrel is mounted at thetop end of a sliding mounting plate, a mounting semicircular ring is welded at the bottom end of the fixed mounting plate, and a clamping semicircular ring is hinged at one end of the mounting semicircular ring; and a fixed mounting rod is mounted between the mounting semicircular ring and the clamping semicircular ring in a clamped manner, one end of the fixed mounting rod is sleeved with a first mounting block, one end of the fixed mounting rod is sleeved with a second mounting block, a top end spray head is mounted at the bottom end of the first mounting block, and a bottom spray head is mounted at one end of a connecting fixing cylinder. When rice needs to be subjected to pesticide spraying, spraying is conducted through the top end spray head and the bottom spray head, the height ofthe bottom spray head is adjusted, so that direct pesticide application is effectively conducted on pest and disease damage positions, meanwhile, pesticide and water fertilizer are sprayed at the sametime, synchronous fertilization and pesticide spraying can be conducted on rice, the labor intensity of planters is relieved, and the spraying effect is guaranteed.

Bulk store for storing bulk material in a pile (2) and reclaiming bulk material from the pile, and comprising -a bulk storing area (1) being laterally delimited by a longitudinally extending delimiting wall (3) - -a bulk material reclaiming device (8) of the side scraper type comprising a pivotally mounted scraping jib (19) being pivotal about an essentially horizontal pivot axis (20) for reclaiming material from the pile, the reclaiming device (8) being movable along a first and a second mutually parallel track (12;13) being parallel with the wall (3) and being provided with first wheel means (15) for travelling on said first track and second wheel means (16) for travelling on said second track, the first track being arranged closer to the wall than the second track, and -a belt conveyer (11) arranged between the first and second track (12;13).