79results about How to "Easy processing and maintenance" patented technology

Plastic alloy of the present invention is prepared through conventional process and with the materials including polypropylene, high-density polyethylene, thermoplastic elastomer, calcium carbonate, antioxidant, lubricant, stabilizer, coupling agent, plasticizer, uvioresistant agent, and nano montmorillonoid or clay or ceramic powder. It has high strength, high toughness, and is anticorrosive, high temperature resistance, non-toxic, easy to machine and maintain and long in service life, and may be used in industry, agriculture, building, medicine and other fields.

The invention discloses a large-sized foldable parabolic antenna, and solves the problem that high-contraction-ratio unfolding and folding of the existing large-sized parabolic antenna cannot be realized due to large occupied space. The large-sized foldable parabolic antenna comprises a base body, fan-shaped parabolic modules, a parabolic center and mechanical connecting rod mechanisms, wherein the multiple mechanical connecting rod mechanisms are uniformly mounted on the outer wall of the base body circumferentially; each mechanical connecting rod mechanism is used for driving one corresponding fan-shaped parabolic module to be opened and folded; meanwhile, the parabolic center is mounted on the top of the base; when n fan-shaped parabolic modules are opened, the n fan-shaped parabolic modules and the parabolic center jointly form the overall parabolic structure; and when the n fan-shaped parabolic modules are folded, the mechanical connecting rod mechanisms also control the corresponding fan-shaped parabolic modules to turn circumferentially so as to enable the adjacent fan-shaped parabolic planes to be mutually overlaid and vertically arranged on the circumferential direction of the base body. The large-sized foldable parabolic antenna has the advantages of capability of realizing quick and automatic folding and extension, high contraction ratio, and capability of ensuring the parabolic plane precision.

The invention discloses a rubber tire container gantry crane. The hoisting mechanism of the rubber tire container gantry crane is composed of a hydraulic pump station and four multistage hydraulic oil cylinders, wherein the hydraulic pump station and the hydraulic oil cylinders are respectively mounted on the upper and lower sides of a trolley frame, synchronous telescoping of each hydraulic oil cylinder is controlled by the hydraulic valve of the hydraulic pump station, and a sling is cooperatively used so as to realize loading and unloading of containers. According to the invention, usage of a traditional hoisting mechanism above the trolley frame is discarded; a series of electrical control components and parts for electrical control are not used, so a structure is substantially simplified, weight is decreased and cost is reduced; the driving axle of a cart travel mechanism of the crane is connected with a driving mechanism through a chain connected with the sprocket wheel of a transmission shaft so as to provide power for running of the whole machine, the driving axle is connected with a driving vehicle frame through a bearing pedestal on the transmission shaft so as to support the whole machine, and the driving axle is connected with the rim of a wheel through a rim flange on the transmission shaft so as to transmit power of the driving mechanism to the wheel, thereby realizing operation of the whole machine; traditional complex axle housing and axle package structures are not used, and corresponding defects caused by the axle housing and axle package structures are overcome.

The invention discloses a universal adjustable box beam splicing and welding device, comprising a web inner clamping device, a web positioning device, and a flange plate positioning and clamping device. The web positioning device comprises clamping boards of a bottom part and an upper part, which are connected with each other; a T-shaped boss is arranged at the center of the bottom part; through holes II are formed at the both sides of the bottom part; the flange board positioning and clamping device comprises clamping blocks; a through hole I and a T-shaped groove are formed on each clamping block; the T-shaped boss is matched with the T-shaped grooves to form double-rectangular sliding rail fit; the two clamping blocks are connected with a screw rod III through the through holes I; an outer extending lug plate is arranged at the outer side of each clamping block; connection holes are formed on the lug plates; the connection holes are connected with a screw rod II; the through hole II 1 is connected with the screw rod II; the screw rod II is matched with a nut II; the web inner clamping device comprises two inner splints; the two inner splints are connected through the screw rod I; and the inner splints are matched with the clamping blocks in position. The universal adjustable box beam splicing and welding device is applicable to assembling and pairing box beams with various sizes, so that the splicing precision and the welding speed of the box beams can be improved.

The invention discloses a device and method for automatically welding a box beam. The device comprises a walking trolley, a main support, a welding gun supporting arm and a welding gun. The welding gun is arranged on the welding gun supporting arm through a hinge shaft, and the welding gun supporting arm is arranged on a vertical rectangular guide rail of the main support. The main support is matched with a horizontal rectangular guide rail of the walking trolley through a rectangular guide rail groove below the main support, and the welding gun can move along the horizontal rectangular guide rail and the vertical rectangular guide rail. In the welding process, the height and the angle of the welding gun are well adjusted according to the camber of the box beam and the positions of a flange plate and a box beam web, and therefore automatic welding can be achieved. According to the device and method for automatically welding the box beam, the structure is simple, adjustment is easy, box beams of various sizes can be conveniently and automatically welded, the labor intensity of welding personnel is lowered, rigidity is high, the bearing capability is high, machining and maintaining are easy, and cost is saved. The box type beam is automatically welded, besides, H-shaped steel used in a steel structure workshop can be automatically welded, and the accuracy of a profiling outline can be effectively ensured.

The invention discloses a circuit device of an injection mold with single-side inlet and outlet cooling water, which comprises a water-stop plate (1), a water faucet (2), a support plate (3), a plug (4), a water inlet channel (6), a folded-back channel (61), a water outlet channel (7), and a water-turning cooling hole (8). The present invention adopts such a technical scheme of cooling water circuit that the water-turning cooling hole consisting of several straight blind holes is arranged in the mold, an isolating device consisting of the water-stop plate, the water faucet and the support plate partitions the water-turning cooling hole into a water turning chamber and a water returning chamber from top to bottom; the water inlet channel and the water outlet channel provided with the straight holes are respectively communicated with the water turning chamber and the water returning chamber and then respectively connected with them by the folded-back channel of the straight hole, and the inlet and the outlet are arranged on the same outer side of the mold. By using the water faucet for partitioning the water inlet and the water outlet channels and the processing convenience of straight hole, the injection mold has inlet and outlet water on the single side, the purposes of simplifying structure, reducing processing cost, no restrict and improving cooling effect are achieved.

The invention discloses an adjustable automatic wire feeding device, and mainly relates to the field of power construction facilities. The adjustable automatic wire feeding device comprises a drive mechanism and a driven mechanism. The drive mechanism is connected to one side of the driven mechanism in a hinged manner, and a limiting pin used for fixing the hinge angle is arranged at the hinged position. The drive mechanism is provided with a power wheel driven by a motor, and a first clamping wheel in reverse transmission through a planetary wheel set so that a cable can be clamped and conveyed, and the driven mechanism is provided with a fixed wheel and a second clamping wheel matched with the fixed wheel so that the turning angle can be assisted. The adjustable automatic wire feeding device has the beneficial effects that the adjustable automatic wire feeding device can be easily matched with various complex power transmission lines to finish line conveying, and meanwhile the cable can be well protected.

The invention relates to an elliptical hole machining device. A workpiece clamping device, a spindle box and a power head are arranged on a seat frame; the spindle box is arranged above a longitudinal feeding device; a hollow worm wheel spindle, a circumferential feeding worm wheel and a circumferential feeding worm spindle are arranged inside the box; a first eccentric axial through hole is formed on the hollow worm wheel spindle; a hollow shaft is arranged in the first eccentric axial through hole; the two ends of the hollow shaft are fixedly connected with pinions respectively; the pinions are meshed with internal gears which are fixedly connected at the two ends of the box; the gear ratio and the pitch diameter ratio of the internal gears and the pinions are both 2:1; second eccentric axial through holes are formed on the two pinions; a cutter spindle is arranged in the second eccentric axial through holes; one end of the cutter spindle is provided with a cutter; and the other end of the cutter spindle is connected with the power head through a telescopic universal coupling. The elliptical hole in the invention has a smooth formed surface, accurate dimension and high quality, and the elliptical hole machining device can meet batch machining of different elliptical holes with low machining cost.

The invention relates to a trapezoidal inner wall cylindrical coupling based on a magnetorheological fluid, which consists of an input group and an output group, wherein the input group comprises an input shaft, an input end shell, an electromagnetic coil and the like; and the output group comprises an output shaft, a spring, an output end shell and the like. a groove structure at the tail end ofthe input shaft is matched with a convex structure at the tail end of the output shaft; trapezoidal teeth at the outer circumference of the input shaft are matched with trapezoidal grooves at the inner circle side of the output shaft; the matching surfaces are all filled with magnetorheological fluid, and the input end shell and the output end shell are connected and sealed. The coupling providedby the invention is provided with a trapezoidal teeth - trapezoidal grooves structure; the spring is added at the axial direction so as to increase the horizontal vibration isolation effect and reducethe vibration and noise when the coupling works; meanwhile, the coupling has the advantages of simple structure, convenient processing and maintenance, etc. , so the coupling is suitable for non-high-power places and can achieve good vibration isolation effect without precise design and processed components. The coupling provided by the invention solves the problems of vibration and noise generated by mechanical contact the automobile coupling during the process of transmitting force and moment.

The invention relates to a seedling transplanter; the seedling transplanter comprises a telescopic rod (4); one end of the telescopic rod is provided with a handle (1), while the other end is provided with a transplanting mechanism; the seedling transplanter is characterized in that the transplanting mechanism comprises a fixed splint (8), a movable splint (11), a pin (5) and a pull cord (12); the fixed splint is fixedly connected on the telescopic rod (4); the movable splint is movably connected with the fixed splint through the pin (5); a reset spring (6) is sleeved on the pin; and one end of the movable splint is connected with the pull cord (12). The device controls the separation and assembling between the movable splint and the fixed splint through the pull cord so as to achieve seedling transplanting; besides, the device is light and flexible and has simple structure, low cost, wide transplanting range, high efficiency of transplantation and low labor intensity, which can be conveniently and rapidly operated on the ridge with one hand.

The invention provides a bladder type energy accumulator which is of five structures and has an external air source and an oil level control function. The energy accumulator can horizontally stretch or retreat to deform to store energy, can allow a bladder to be taken out integrally for in-situ replacement, can horizontally or vertically deform to store energy, or has a pull-rod fixed-capacity/variable-capacity control function. According to the operating principle, energy storage is realized through horizontal deformation of the bladder or through main horizontal deformation and auxiliary vertical deformation. According to the structure of the bladder, the diameter of the bladder is half that of a cylinder, the two ends of the bladder are fixed and are open, or one end of the bladder is closed, and the bladder becomes thinner gradually from the two ends to the middle. Oil and gas are separated by the bladder, gas is guided into the bladder, oil is injected outside the bladder, energyconversion is achieved by means of gas pressure changes caused by alternate changes of the volume of oil and the volume of gas, and thus, the purposes of energy storage and release are realized. An automatic alarm device is arranged for oil shortages. Inlet oil can be magnetically filtered. The bladder type energy accumulator has the advantages that the structure is simple, the manufacturing costis lower, machining, manufacturing and maintenance are convenient, and responding is more sensitive; and intelligent control can be achieved, and the bladder type energy accumulator is suitable for alarge-capacity energy storage and closed-loop hydraulic balance system.

The invention discloses a combined type rib cutting convex mold. The combined type rib cutting convex mold comprises a rib cutting convex mold set unit and a convex mold fixing plate, wherein the rib cutting convex mold set unit mainly comprises a vertical middle rib cutting convex mold, a bottom rib cutting convex mold, a convex mold pressing block and a rectangular convex mold cushion block; the side edges of the middle rib cutting convex mold and the bottom rib cutting convex mold are sequentially connected to form a rectangular cavity; the convex mold pressing block is positioned in the cavity; the upper end of the convex mold pressing block is fixedly connected with the bottom surface of the convex mold cushion block; annular bosses are arranged on the convex mold cushion block; fixed grooves matched with the bosses are formed in the middle rib cutting convex mold and the bottom rib cutting convex mold; the bosses are positioned in the fixed grooves. Compared with the prior art, for the combined type rib cutting convex mold, the production cost of an integrated circuit product is reduced; the production efficiency is improved; the structure of the rib cutting convex mold of the integrated circuit product rib cutting process is improved; the combined type rib cutting convex mold is simple in structure and convenient to process and maintain; the production efficiency is doubled; the mold investment is reduced; the combined type rib cutting convex mold has the necessity of popularization, implementation and application.

The invention discloses an electronic direct current conversion device, a printed circuit board (PCB) and an electronic direct current conversion method. The electronic direct current conversion device is used for supplying direct current voltage to an electronic controller of an engineering machinery electronic control engine and comprises a low-pass filter circuit, wherein the low-pass filter circuit comprises a filter resistor and a filter capacitor, which are connected with each other; one end of the filter resistor is connected with a pulse width modulation (PWM) signal output end of an engineering machinery controller; and an output end of the filter capacitor is connected with the electronic controller. By the invention, a PWM signal which is output by the engineering machinery controller can be converted into the direct current voltage, and the rotating speed of the engine is regulated in real time.

The invention provides a bicycle rope transmission mechanism. The bicycle rope transmission mechanism comprises a double-ratchet-wheel rear wheel, flywheels, a transmission rope, a rack, fixed pulleys, a connecting rods, pedals, a linkage rope, a rear wheel shaft and a volute spiral spring. The two flywheels are installed on the two sides of the double-ratchet-wheel rear wheel, and one end of the transmission rope is fixed to the flywheels, wound on the flywheels for a plurality of circles, then wound around the fixed pulleys installed on the rack and connected with the corresponding connecting rods. A connecting rod mounting shaft can be independently mounted on the rack, and the rear wheel shaft can also be used. The front ends of the two connecting rods are wound around the fixed pulleys installed on the rack through the linkage rope to be connected together, and pedal linkage is guaranteed. One end of the spiral spring is installed on the rear wheel shaft, and the other end is installed on the flywheels to achieve winding recovery of the transmission rope. Circumferential motion is replaced by up-down reciprocating motion during riding, work can be done by means of the gravity of a human body, the force exerting function of the human body structure is exerted to the maximum extent, the comfort of a rider is improved, the number of parts is small, machining and maintenance are easy, and large-scale popularization is easy.

The invention relates to the technical field of culvert tunnel excavating equipment drive devices, in particular to a main drive device for a shield tunnelling machine with the diameter being 5 to 7 m. The main drive device comprises a shell, driving devices, main bearings, a cutter disc support and a seal structure; the shell is provided with the multiple driving devices and the main bearings which are correspondingly connected, the cutter disc support is arranged in the shell, and is connected with the main bearings through bolts in an occlusal manner, the seal structure is arranged betweenthe cutter disc support and the shell, and a cutter disc is arranged on the cutter disc support; each driving device comprises a motor and a speed reducer, the speed reducer is arranged on the shell in an occlusal manner, and the motor is connected with the speed reducer; small gears on the output ends of the speed reducers are engaged with teeth on outer rings of the main bearings; and through the technical scheme, the problems that in the prior art, the structure is complex and particular, the size is large, bearing is large, and purchasing maintaining cost is high can be solved.

Disclosed is a three-cavity type three-position four-way air-control reversing hydraulic valve. A valve hole (L) is communicated with a front cavity (G3), a middle cavity (G2) and a rear cavity (G1), an oil return hole (H) and an oil outlet hole (S) are respectively communicated with a hydraulic oil tank (21) and an oil cylinder (24), a horizontal oil return hole (E) and a horizontal oil inlet hole (J) are connected with an oil pump (23), and a lifting air hole (Q2) and a descending air hole (Q1) are communicated a proportional air valve (20) via air pipes (5). The lifting air hole (Q2) intakes air, a valve stem (9) translates backwards, the oil pump (23) supplies oil into a valve body (1) and the oil cylinder (24) in sequence, and the oil cylinder (24) is lifted up. The descending air hole (Q1) intakes air, the valve stem (9) translates forwards, hydraulic oil enters the valve body (1) and returns to the oil pump (23) via the horizontal oil return hole (E), no oil is supplied to the oil cylinder (24), the hydraulic oil in the oil cylinder (24) returns to the valve body (1) via the oil outlet hole (S), partially flows into the oil pump (23) via the horizontal oil return hole (E) and partially flows into the hydraulic oil tank (21) via the oil return hole (H), and thereby oil circulation is formed. The three-cavity type three-position four-way air-control reversing hydraulic valve is small in size, light in weight, good in matching capability, high working efficiency and wide in application range.