450results about How to "Avoid rigid contact" patented technology

The invention relates to a movable parallel wire driven lower limb rehabilitation robot and an implementation method thereof. The robot comprises a suspension weight reducing unit, a tension sensor, safety straps, a safety handrail, a spring, a door fence, wire driving units, universal driven wheels, a leg wearing device, a treadmill, rear driving wheels, wires, a supporting frame and a liquid crystal display screen. The whole robot is of a truss structure formed by the supporting frame, and the suspension weight reducing unit on the upper portion is connected with the safety straps through the wires; the movement of the waist of a patient is constrained through four groups of springs between four vertical beams on the left and on the right and between the safety straps; the liquid crystalscreen is arranged above the safety handrail on the front portion of the robot; the patient and a wheelchair enter and go out through the left door fence; four cross beams at corresponding positionsof an affected limb sagittal plane on each side are provided with the four wire driving units; the affected limb is driven for rehabilitation training by pulling the leg wearing device through the wires; the universal driven wheels are installed on the front portion of the bottom of the robot, and the rear driving wheels are arranged on the rear portion of the robot. The robot can achieve gait training and walking training in passive, power-assisted and active modes.

The invention relates to a worm gear-worm pair backlash eliminating device adopting an enveloping worm, which mainly consists of a worm gear, a cylindrical worm, the enveloping worm, an elastic pre-tightening device and a bearing. The cylindrical worm and the enveloping worm play the main force scale division role and the resistance role respectively, and the two worms are coaxially mounted and carry out the regulation and impose the pre-tightening force on a resistance worm in the axial direction through the elastic pre-tightening device. The pre-tightening device consists of a regulating nut, two spring positioning sleeves and a pre-tightening spring, regulates and pre-tightens the resistance worm in the axial direction through the regulating nut. The elastic pre-tightening device can be one of a spring device, a hydraulic device or a pneumatic device. The resistance enveloping worm and the main force worm are coaxially mounted in the worm gear-worm pair backlash eliminating device, and the axial regulation and the pre-tightening are carried out on the resistance worm through the elastic pre-tightening device, thereby providing the more stable, high-efficient and low-noise transmission and simultaneously having the advantages of compact structure, light weight, low cost and the like. The worm gear-worm pair backlash eliminating device is applied in a transmission mechanism of a rotary workbench of a machine tool and can provide better backlash eliminating effect in comparison with a single worm gear-single worm mechanism or a double-worm gear-worm mechanism.

The invention discloses a small oscillating grain hulling machine, which comprises a frame, an oscillating mechanism, a screening mechanism and an air outlet mechanism. The air outlet component and the damper component drive the vibration component to run through the driving component. After the vibration component pushes the screening net in the screening component to a high place, the screening net drops rapidly by gravity, throws the grain on the screening net into the air, and is removed by the wind component. Light impurities such as chaff in the grain, and then the grain is returned to the screening net, and the granular impurities in the grain are screened and removed by the screening net. Repeat this process to completely remove the chaff impurities and granular impurities in the grain, and improve the screening efficiency.

The invention provides a solidification/forming/heat treatment integrated preparation method of a carbon fiber metal laminate curved surface piece, and belongs to the technical field of multi-layer plate preparation and forming. According to the method, carbon fiber resin composite materials and solid solution-state aluminum alloy plates are alternately laminated to obtain a non-solidified fiber metal laminate; and the non-solidified fiber metal laminate undergoes heating, double-side pressing, heat preservation, solidification, forming and aging treatment to obtain the carbon fiber metal laminate. By adopting the process, the solidification/forming/heat treatment process of the fiber metal laminate can be integrated to significantly improve the processing efficiency; under the action of normal stress, the shear strength between the fiber layers and the aluminum alloy layers is higher and the plasticity of the aluminum alloy plates is better; and double-side gas pressure forming is adopted, so that the rigid contact of molds is avoided and the surface quality of components is better.

The invention provides a boiler waste heat collection and utilization device, which relates to the technical field of boilers. The boiler waste heat collection and utilization device comprises a smokebox, wherein a water column pipe is fixedly arranged in the smokebox through a fixing block; two ends of the water column pipe penetrate through the top part of an inner wall of the smokebox and extend to the top part of the smokebox so as to communicate with a water inlet and a water outlet pipe; an air inlet pipe communicates to a position, close to the left side, of the bottom part of the smokebox; an air outlet pipe communicates to a position, close to the top part, of the right side of the smokebox; and a side box is fixedly arranged on a side wall of the smokebox. According to the boilerwaste heat collection and utilization device, a motor controls a turbine to move up and down on an outer surface of a screw rod, a mutual attraction force of an external magnet and an internal magnetdrives a clearing block to move up and down on an outer surface of the water column pipe, and a friction block slides up and down on the outer surface of the water column pipe so as to scrape dust onthe outer surface of the water column pipe, so that the occurrence of the phenomenon that increasing smoke dust accumulated on the outer surface of the water column pipe so as to cause the reducing of heat exchange efficiency and the relatively reducing of an economic value of a waste heat system is avoided.

The invention discloses a full-automatic system for stamping sheet metal, and relates to the technical field of sheet metal stamping. The full-automatic system comprises a base, a supporting plate, amounting frame, a material conveying plate and a punching machine body; the base and the supporting plate are arranged horizontally up and down correspondingly, two groups of supporting frames are arranged in parallel in a lifting space, and each group of supporting frames comprises two lifting frames arranged in parallel, wherein each lifting frame comprises a first supporting rod and a second supporting rod; the supporting plate is further provided with a clamping mechanism in a sliding mode up and down, a feeding mechanism is horizontally arranged on one side of the clamping mechanism in asliding mode, and the punching machine body is positioned at the limit position where the feeding mechanism advances; a material returning mechanism is arranged on a supporting platform, in a punchingarea, of the punching machine body; and the material conveying plate is obliquely arranged on the mounting frame. The full-automatic system realizes the technical effects of integrating of feeding, punching and discharging and saving labor force.

The invention discloses a self-adaptive grinding tool for a vertical crankshaft and relates to the technical field of engine part grinding tools. The grinding tool comprises a positioning device for vertically clamping the crankshaft and a grinding device located on one side of the positioning device and used for self-adapting to the outline of the crankshaft. The crankshaft grinding tool solves the problems that in order to ensure the fastening of a crankshaft, the stress influence on the crankshaft is ignored in the grinding tool in the prior art; in order to achieve the purpose that when the crankshaft face is ground, the same grinding amount of the crankshaft face cannot be guaranteed; when parts with different widths of the crankshaft are ground, the displacement amount needs to be frequently adjusted; and due to limitation of a grinding wheel, the side wall of the crankshaft can be ground in an auxiliary mode manually with the help of an auxiliary tool.

The invention discloses an air sac device for protecting feet of a car passenger. The air sac device comprises an air sac, a sensor, an air generator and an air sac ECU (electronic control unit), wherein the air sac is arranged on a car floor of a transition area between a car front wall plate and the floor and at the position of feet of the car passenger. During collision of cars, the air sac ECU can control the air generator to inflate the air sac according to car state information detected by the sensor, so that the air sac can be inflated to protect the feet of the passenger.

The invention discloses a method and device for deironing continuously in slurry in a bi-twisting mode, and belongs to the field of magnetically separating solids in slurry. Magnetic bars in magnetic bar groups are placed in a slurry barrel for adsorbing scrap iron in slurry, and then the scrap iron adsorbed on the magnetic bars is removed. The method and device for deironing continuously in slurry in a bi-twisting mode are characterized in that the magnetic bars in the magnetic bar groups are arranged horizontally; one part of the magnetic bars in the magnetic bar groups are positioned in the slurry, and the other part of the magnetic bars are all exposed out of the liquid level of the slurry; the magnetic bar groups rotate, so that the scrap iron adsorbed on the part of magnetic bars exposed out of the liquid level of the slurry is removed. The method and device for deironing continuously in slurry in a bi-twisting mode, which are provided by the invention, have the beneficial effects that the skillful design of a sandwiched wall cavity enables the slurry in the cavity to be in contact with the magnetic parts maximally, and the magnetic force is applied to the slurry uniformly, and a preferable deironing effect is obtained; the magnetic parts rotate continuously so that deironing is carried out uninterruptedly, and the deironing efficiency is improved greatly; the stability is extremely high, and the maintenance cost is extremely low.

The invention discloses a prepressing method for a hanging basket jack. To make the stress state of the pressure test loading process coincide with that of the practical construction work, the jack is adopted for conducting loading and prepressing to a hanging basket at the midspan of a beam bottom plate of a section 1#, namely a reaction frame is arranged on the end face of a web of a section 0#, by utilizing the opposite acting force of the reaction frame, the opposite acting force is transformed to the bottom plate of the hanging basket through the jack, a sleeper distributive girder or a square timber distributive girder and a wooden plate cushion for exerting the required prepressing load, the concrete load level of the heaviest section is simulated for conducting loading, the technical effects are achieved, namely the prepressing method for the hanging basket jack is convenient and timesaving, the consumption of material resources is little, it can be guaranteed that a pile cap foundation pit is backfilled timely, the construction of a block support foundation 0# is guaranteed, the bottom plate of the hanging basket is stressed more uniformly, the prepressing load of the hanging basket is closer to the practical construction conditions, the processing of the reaction frame and embedded components is simpler, and the operation is easier.

The invention discloses a vibration conveyor for automatic production. The vibration conveyor comprises a rack, a base, a driving system, a swinging device, a conveying supporting frame and a conveying device, wherein the base is arranged on the rack; the driving system is mounted on the base; the swinging device is hinged to the rack and driven by the driving system to swing; the conveying supporting frame is hinged to the swinging device, and the conveying device is arranged on the conveying supporting frame. According to the vibration conveyor adopting the aforementioned structure, the shock absorbing performance can be improved, and the supporting stability can be improved; the swinging device can swing uniformly, so that the swinging device can be protected, and as a result, the conveying device can be limited to deform.

The invention belongs to the technical field of machining and discloses a clamping device for camshaft machining. The clamping device comprises a base. The base is provided with a first supporting column, a U-shaped communicating vessel and a second supporting column. The U-shaped comprises a first transverse pipe, a second transverse pipe and a vertical pipe. The clamping device further comprises an L-shaped positioning column and a locking column. The lower end of a long pole of the positioning column is connected with a first transverse push rod. The lower end of the long pole of the locking column is connected with a second transverse push rod. The right end of the first transverse push rod is connected with a first piston. The right end of the second transverse push rod is connected with a second piston. A gear is arranged between the first transverse push rod and the second transverse push rod. The first transverse push rod and the second transverse push rod are both provided with racks. Air holes are formed in the first transverse push rod. Through holes are formed in the long pole of the positioning column. A mounting groove is formed in the top end of the long pole of the positioning column. A transverse protrusion block and a vertical positioning block are arranged in the mounting groove. A rotary shaft is arranged on the left side of the positioning block. A cam and a torsional spring are connected to the rotary shaft. The problem that the clamping efficiency in the prior art is low is solved.

The invention relates to the technical field of machining of grooves shaped like a Chinese character 'wang' and discloses a clamping device for a groove shaped like a Chinese character 'wang'. The clamping device comprises a fixing frame and a motor; a first clamping block and a second clamping block are arranged on the top of a rack; a supporting board is arranged between the first clamping blockand the second clamping block; an air flue is arranged inside the first clamping block and provided with an annular cavity; an oblique opening is formed in the annular cavity; a wind flue is arrangedinside the second clamping block; a guide rod is fixed to the second clamping block; a chute and a sliding shaft are arranged on the lower portion of the supporting board; a convex block is fixed tothe bottom of the sliding shaft; an auxiliary bevel gear and a rotary shaft are arranged on one side of the sliding shaft; a spiral slide is arranged on the rotary shaft; a screw rod is fixed to therotary shaft; the auxiliary bevel gear is engaged with a main bevel gear; the main bevel gear and the motor are fixedly connected; a spiral track is arranged on a rotary rod; an air tank is arranged below the sliding shaft and internally provided with a piston board; one side of the air tank communicates with the annular cavity through an electromagnetic valve; and the other side of the air tank communicates with the wind flue through a one-way valve. The clamping device is simple in structure, a machining board for machining the groove shaped like the Chinese character 'wang' is convenient totake out, and waste scraps are convenient to collect.

The invention provides a vibration damping fastener for a groove type rail of a streetcar. The vibration damping fastener comprises a vibration damping strip which is arranged at the waist part of the groove type rail, a positioning iron plate and a positioning spring piece which are used for extruding and fixing the vibration damping strip, wherein the positioning spring piece enables the vibration damping strip to be tightly bonded to the waist part of the groove type rail through the positioning iron plate. For the vibration damping fastener for the groove type rail, by adoption of the ingenious design of the shape and the structure of each part and the connection, the multi-stage vibration damping is realized, the rigid connection is reduced, and thereby, and the purposes of reducing the vibration of the rail and reducing the noise pollution are achieved.

The invention relates to an ultrasonic vibration screen. The ultrasonic vibration screen comprises a bracket, a screen and an ultrasonic vibration head, wherein the screen is arranged on the bracket; the ultrasonic vibration head is arranged on the outer side of the bracket; the ultrasonic vibration head is provided with a vibration-transmitting shaft; a shaft hole is formed on the bracket; the vibration-transmitting shaft is inserted into the shaft hole from the outer side of the bracket and the end part of the vibration-transmitting shaft passes through the shaft hole; the end part of the vibration-transmitting shaft is connected with a vibration ring; and the vibration ring is close to the surface of the screen. A method for filtering and screening powder by using the ultrasonic vibration screen is characterized in that: the ultrasonic vibration head separated from the screen transmits vibration generated by the ultrasonic vibration head to the vibration ring through the vibration-transmitting shaft; and the vibration ring acts on the screen, so that the screen is vibrated up and down, large-particle powder is isolated by the screen, small-particle powder penetrates the screen, and the powder can be filtered and screened. By the ultrasonic vibration screen and the method for filtering and screening the powder by using the same, working efficiency is high; the screen is easy to clean and is difficult to break through vibration; and service life is long.

The invention relates to a tandem piezoelectric directional driver, which comprises a first support leg, a second support leg, a tandem piezoelectric vibrator, a first foot bearing and a second foot bearing, wherein the tandem piezoelectric vibrator is in a cylinder structure which is formed by combining a plurality of round piezoelectric vibrators, a plurality of connection rings and a connecting pole; the first support leg and the second support leg are symmetrically pasted at two ends of the tandem piezoelectric vibrator; the first foot bearing and the second foot bearing are formed by compounding two materials with different friction coefficients and are arranged on the first support leg and the second support leg respectively; the tandem piezoelectric vibrator is electrified for telescopic deformation; and the materials with different friction coefficients on the two foot bearings are in contact with the working surface, so that the directional driving capability is generated; and the tandem piezoelectric directional driver is manly applied to the field of a bionic robot, detection and rescue and the like as a driver, and has the advantages of high driving capability, high environmental adaptability and the like.

The invention provides a curved surface grabbing mechanism. The curved surface grabbing mechanism comprises a mounting plate, guide sleeves fixed to the mounting plate and guide rods sliding along the guide sleeves. The guide rods are connected with a cylinder fixing plate. Elastic parts are arranged between the mounting plate and the cylinder fixing plate. A clamping jaw cylinder is arranged on the cylinder fixing plate and provided with two oppositely-arranged clamping jaws. The inner sides of the two clamping jaws are each provided with a plurality of rod-shaped cushions. According to the curved surface grabbing mechanism, springs are arranged between the mounting plate and the cylinder fixing plate for buffering, so that rigid contact between the curved surface grabbing mechanism and a product is avoided, and the product is prevented from being crushed; through the arrangement of the rod-shaped cushions on the clamping jaws, the clamping jaws can be attached to the curved surface product to the maximum extent, and the product can be grabbed stably.