40results about How to "Avoid local stress" patented technology

The invention relates to a non-contact spray-grinding wheel head of airtight suction air for numerical controlled polishing, belonging to the cold machining technical field in optics. The invention e is to provide solution of a non-contact spraying grinding wheel head of airtight suction air for numerical controlled polishing. The non-contact spray-grinding wheel head comprises a hollow grinding wheel head, a plurality of outlets of the polishing liquid, a connection support and a catch tray of the polishing liquid, an air inlet, a air curtain groove, a hole for liquid suction, a collecting tank and other members, which is characterized in that: the catch tray of the polishing liquid is fixedly connected with the shaft sleeve of the grinding wheel head through the connection support of the catch tray and is sleeved on the hollow grinding wheel head; the first air inlet and the first air curtain groove of the catch tray are communicated with each other; the first air curtain groove is communicated with the interspaces between the hollow grinding wheel head and the catch tray; the second air inlet and the second air curtain groove of the catch tray are communicated with each other; the second air curtain groove is communicated with the lower working surface of the catch tray; the collecting tank is on the lower working surface of the catch tray; the hole for liquid suction on the collecting tank is communicated with the out space of the catch tray; the outlets of the polishing liquid are distributed on the working surface of the hollow grinding wheel head.

A non-contact liquid-spraying grinding head for the numerally controlled polishing is composed of a hollow drive shaft and a hollow grinding head with an internal cavity and several polishing liquid spraying-out holes. Its advantages are high polishing quality.

The invention discloses a vibrating and twisting combined impact speeding-up drill. The vibrating and twisting combined impact speeding-up drill comprises a drill column, a drill bit arranged at one end of the drill column, and a hydraulic passageway arranged in the length direction of a drill column body. The hydraulic passageway comprises an axial hydraulic passageway body and a twisting direction hydraulic passageway body which are sequentially arranged from top to bottom in the overall flowing direction of the hydraulic passageway. The axial hydraulic passageway body is provided with an axial vibration impact system for providing axial vibration for the drill bit, the twisting direction hydraulic passageway body is provided with a twisting direction vibration impact system for providing twisting direction vibration for the drill bit, and the axial vibration impact system and the twisting direction vibration impact system both conduct power transmission through the drill column. The axial vibration impact system and the twisting direction vibration impact system are organically combined into the same drill column, a non-thread type drill bit assembly is clamped to the drill column, and therefore local stress is avoided effectively. Axial vibration impact and twisting direction vibration impact directly act on a drill bit body, and energy attenuation is avoided to the greatest extent.

The invention discloses a filtering device used for processing edible oil and capable of automatically collecting oil residues and relates to the technical field of edible oil processing. The filtering device specifically comprises a processing box, an extrusion mechanism, a smashing mechanism, a filtering mechanism and an oil stain collecting mechanism. The upper surface of the processing box isprovided with a feeding port, the extrusion mechanism is located inside the processing box and comprises a rack, a hydraulic cylinder, a hydraulic rod, a collecting plate, a diverter rod and an extrusion plate. Gate plates are arranged on the left side and the right side of the extrusion mechanism, the smashing mechanism is located on the outer side of the gate plates, the filtering mechanism is positioned below the extrusion mechanism, a supporting inclined frame is welded on the outer side of the processing box, and the oil stain collecting mechanism is positioned below the filtering mechanism. An oil residue filtering structure is arranged in an edible oil processing device so that oil residues can be collected in a centralized manner, and a filter screen has strong flexibility and is convenient to mount and dismount, so that the filter screen is convenient to clean, and the smoothness of the filter screen is favorably maintained.

The invention discloses a staggered stacking structure for heat exchange pipes. The staggered stacking structure comprises an inlet header, an outlet header and the heat exchange pipes, all of which are arranged in an inner cavity of a shell. The inner cavity is filled with phase change materials. The multiple heat exchange pipes are arranged and evenly distributed in the axial direction of the inlet header and the outlet header. By means of the staggered stacking structure, the inlet and outlet direction of the heat charging and heat releasing process is consistent, and local stress caused by contraction or expansion of phase change materials in the heat charging and releasing process is effectively avoided. Meanwhile, the temperature field of a whole phase change energy storage device can be homogenized, the average temperature of transverse sections of different heights in the device is almost consistent, and accordingly the phase change energy storage device can have a better thermodynamic property and more accurate temperature control level.

The invention relates to a clamping tool and a clamping method on the basis of the tool. A clamping device of a large-aperture diffraction grating comprises a mirror frame, a main positioning frame arranged at the side edge of the mirror frame, and four compressing arm sets which are respectively arranged at four corners of the mirror frame; a large-aperture diffraction grating to be clamped is positioned into the mirror frame and stopped on the main positioning plate; the compressing arm sets compress the large-aperture diffraction grating to be clamped to connect with the mirror frame. With the adoption of the clamping device and method for the large-aperture diffraction grating, the installation and debugging are fast, and the precision is high.

The application discloses an electronic device, comprising: a housing having an accommodating space and at least one opening communicated with the accommodating space; a flexible display screen, wherein the first end of the flexible display screen is arranged on the shell, and the second end of the flexible display screen extends into the accommodating space through the opening; a transmission assembly which is arranged in the containing space and comprises a reel and a transmission part, wherein the reel is rotationally connected with the transmission part, and the second end of the flexible display screen is fixed to the reel; when the electronic equipment is switched between the folding state and the unfolding state, the reel rotates, so that the second end of the flexible display screen moves relative to the opening. The display area of the flexible display screen in the outward folding state is increased, local stress generated by the flexible display screen in the outward folding state is avoided, creases are not prone to appearing on the flexible display screen, and the damage rate of the flexible display screen can be reduced.

The invention discloses a robot for cargo handling in a logistics warehouse. The robot comprises a supporting plate, wherein a motor and two vertical columns are arranged on the supporting plate; rectangular grooves are formed in opposite side walls of the two vertical columns; the output end of the motor is connected with a connecting rod; the connecting rod penetrates through the lateral wall of any one of the two vertical columns and is arranged in the corresponding rectangular groove; an upper gear is mounted at the upper ends of the rectangular grooves; two lower gears are mounted at an end part of the connecting rod; the upper gear is connected with the lower gears through a gear belt; two reversely-mounted air cylinders are arranged on the upper wall of a lifting plate; and pushing plates are mounted at the output ends of the air cylinders. In a lifting process, cargo on the lifting plate is raised or lowered at a relatively stable speed, thereby avoiding displacement caused by shaking of the cargo on the lifting plate and improving the cargo lifting safety reliability.

The invention discloses a logistics robot which comprises a guiding aisle and a stacking mechanism, wherein the stacking mechanism comprises a supporting plate placed on a bulge; a plurality of rolling wheels are mounted at the bottom of the supporting plate; a motor and two vertical columns are arranged on the supporting plate; rectangular grooves are formed in opposite side walls of the two vertical columns; the output end of the motor is connected with a connecting rod; the connecting rod penetrates through the lateral wall of any one of the two vertical columns and is arranged in the corresponding rectangular groove; an upper gear is mounted at the upper ends of the rectangular grooves; two lower gears are mounted at an end part of the connecting rod; the upper gear is connected with the lower gears through a gear belt; two reversely-mounted air cylinders are arranged on the upper wall of a lifting plate; pushing plates are mounted at the output ends of the air cylinders; and travel switches are electrically connected with the motor through a controller. In a lifting process, cargo on the lifting plate is raised or lowered at a relatively stable speed, thereby avoiding displacement caused by shaking of the cargo on the lifting plate and improving the cargo lifting safety reliability.

The invention provides a two-roll continuous mill for wires, which is capable of finishing diameter reduction for the wires in one working procedure, thus reducing working procedure, and then reducing the consumption of fuels, electric energy, auxiliary materials, manpower and the like, and increasing production efficiency. The two-roll continuous mill for the wires comprises a mill rack, a wire inlet, a wire outlet, as well as a lubricating and cooling water inlet tube and a lubricating and cooling water return tube of a single cold-rolling machine, wherein the single cold-rolling machine comprises a transversal cold-rolling machine and a vertical cold-rolling machine, and the transversal cold-rolling machine and the vertical cold-rolling machine are alternately arranged on the mill rack. The two-roll continuous mill for the wires is characterized in that the single cold-rolling machine is driven by an independent rolling motor and a rolling input gearbox.

The invention provides a modular connection joint of a steel structure. The modular connection joint comprises a first joint, a second joint and a connection block, wherein a positioning post is arranged on the end surface of the first joint, a first connecting groove is formed in the face, adjacent to the end face, of the first joint, the end face of the second joint is provided with a positioning hole, and a second connecting groove is formed in the face, adjacent to the end face, of the second joint, the positioning post corresponds to the positioning hole, the first connecting groove corresponds to the second connecting groove in position, and the first connecting groove and the second connecting groove are connected through the connection block. The radial fixation between the first joint and the second joint is achieved through cooperation of the positioning post and the positioning hole, and axial fixation is achieved through the connection block so that the first joint and thesecond joint can bear radial stress and also bear an axial force, a fixing way is simple, large-batch modular production can be achieved, modular assembly can also be achieved, and the assembly efficiency is improved.

An embodiment of the invention provides a double-layer train carriage. The carriage comprises a roof, a bottom frame and a carriage space defined by side wall structures, wherein the carriage space isdivided into an upper carriage and a lower carriage by floor structures; each side wall structure comprises a roof connecting section for primary fixed connection, a load bearing section and a bottomframe linking section; each load bearing section comprises a switching structure for mounting and fixing the floor structure of the upper carriage. According to the technical scheme, adjustment transition is performed by the switching structure, the problem of fit tolerance accumulation caused in the side wall mounting process is solved, so that the floor structures of the two carriages can be fixedly connected with side walls smoothly, and meanwhile, local effects of local stress problems or welding processes in the direction connection process of the floor structures and the side walls on strength of the side walls are avoided.

The invention discloses a bridge reinforcing device and belongs to the technical field of bridges, the bridge comprises a top plate, a bottom plate and a plurality of box girders supported between the top plate and the bottom plate, and the box girders are arranged in the transverse direction of the bridge. The reinforcing device comprises a box girder flange plate supporting plate, a supporting clamping plate, a plurality of first box girder web tightening rods and a plurality of second box girder web tightening rods, reinforcing layers are arranged on the inner sides of the box girders in a cast-in-place mode, and the two ends of the first box girder web tightening rods and the two ends of the second box girder web tightening rods are fixedly connected with the reinforcing layers of the two adjacent box girders. The first box girder web tightening rod and the second box girder web tightening rod are located in two planes with different heights respectively, and the first box girder web tightening rod and the second box girder web tightening rod are staggered in the vertical direction. The device can be used for repairing and reinforcing the bridge, larger potential safety hazards are avoided, traffic pressure is relieved, and the service life of the bridge is prolonged.

The invention discloses a book block flattening machine. The book block flattening machine comprises a rack, a rotary table rotationally installed on the rack, a hydraulic cylinder fixedly connected with the rotary table, a pressing assembly rotationally installed at the output end of the hydraulic cylinder and an adjusting assembly driving the rotary table to rotate, wherein the output end of thehydraulic cylinder is arranged downwards; the pressing assembly comprises a pressing plate horizontally and rotationally installed at the output end of the hydraulic cylinder, pressure equalizing rods evenly arranged on the hydraulic cylinder and pressing wheels installed on the pressure equalizing rods at intervals along the axes of the pressure equalizing rods, wherein the pressing wheels abutagainst the pressing plate; and each pressing wheel comprises a U-shaped mounting plate, a roller rotationally installed in the mounting plate and a supporting shaft vertically and fixedly connected with the outer wall of the bent position of the mounting plate, and a corresponding mounting hole is formed in the side, facing the pressing plate, of each pressure equalizing rod. According to the book block flattening machine, stress can be more uniform in the book block flattening process, and the flattening effect is improved.

The invention discloses a segmented protection device for a drill pipe. The segmented protection device comprises a cylinder body, the cylinder body is provided with a plurality of annular grooves, the cylinder body is divided into a plurality of rigid parts by the annular grooves, and the annular grooves are internally provided with flexible parts; the flexible parts include leather layers, and aplurality of fixing rings are disposed at the tops and the bottoms of the leather layers. The segmented protection device further includes a plurality of bolts and nuts matched with the bolts, an annular filling chamber is filled with a plurality of first spheres and a plurality of second spheres, the diameter of the first spheres is 8-15 times the diameter of the second spheres. The segmented protection device further includes a plurality of protection mechanisms, and the protection mechanisms are internally provided with at least one bolt and at least one nut. The compressive strength at different positions of the cylinder body is different, by additionally arranging the flexible parts with lower cost, the production cost of the cylinder body is reduced, the transportation and storage steps of the cylinder body are further easier, the cylinder body has the ability to adapt to a variety of soil environments, and the universality of a protective sleeve is improved.

The invention discloses an intelligent robot used for goods stacking. The intelligent robot comprises a guide gangway and a stacking mechanism; the stacking mechanism comprises a supporting plate arranged on a bulge; a plurality of rollers are mounted on the bottom of the supporting plate; a motor and two stand columns are arranged on the supporting plate; rectangular slots are formed in opposite side walls of the two stand columns; the output end of the motor is connected with a connecting rod; the connecting rod penetrates through the side wall of any one of the two stand columns, and is arranged in the rectangular slots; an upper gear is mounted at the upper ends of the rectangular slots; two lower gears are mounted on the end part of the connecting rod; the upper gear is connected with the lower gears through toothed belts; two air cylinders which are reversely mounted are arranged on the upper wall of a lifting plate; pushing plates are mounted on the output ends of the air cylinders; and a travel switch is electrically connected with the motor through a controller. In a lifting process, goods on the lifting plate ascend or descend at relatively stable speed, so that the goods are prevented from shifting as a result of shaking on the lifting plate, and therefore, goods lifting safety reliability is improved.

The invention discloses auxiliary equipment for petroleum excavation. The auxiliary equipment comprises a cylinder, a plurality of annular grooves are formed in the cylinder and partition the cylinderinto a plurality of rigid parts, flexible parts are arranged in the annular grooves, and the heights of the flexible parts are gradually decreased from the upper end of the cylinder to the lower endof the cylinder; and the flexible parts comprise leather layers, closed annular filling cavities are constituted by the leather layers and the annular grooves and each filled with a plurality of firstballs, a plurality of second balls and a plurality of third balls, and the auxiliary equipment further comprises a plurality of protecting mechanisms. The compressive strength of all the positions ofthe cylinder is different, by additionally arranging the flexible parts with the lower cost, the production cost of the cylinder is lowered, the transport and storage steps of the cylinder are also easier, the cylinder has the ability to adapt to various soil environments, and the universality of a protecting sleeve is improved.