58results about How to "Reduce longitudinal vibration" patented technology

A band saw machine includes a driving wheel and a driven wheel around which an endless band saw blade is wound. At least one of the driving wheel and the driven wheel is directly connected to an output shaft of a control motor. The output shaft of the control motor is arranged in a cylindrical bearing unit installed on a motor base supporting the control motor. The driving wheel is rotatably supported by the bearing unit.

The invention discloses a novel suspension bridge center buckle device which comprises a cable clamp, a sling upper pulley, a double-strand sling, a vibration reduction frame, a sling lower pulley, adouble-strand sling fixing device, a space type inclined rod, a viscous damper and a space type inclined rod fixing device. The cable clamp is fixed to the midspan position of a suspension bridge maincable, and the upper ends of the suspension cable upper pulleys and the upper ends of the inclined rods are fixed to the cable clamp. The double-strand slings form a closed loop through upper and lower pulleys, and a plurality of damping frames are arranged in the middle of the double-strand slings; and the viscous damper is fixed in the middle of the inclined rod. The sling forms a closed loop through the upper pulley and the lower pulley, the vibration reduction frame is arranged, and the viscous damper is arranged on the inclined rod, so that longitudinal vibration of the short sling is reduced, and damage to an anchor head of the sling due to longitudinal reciprocating motion is prevented; by arranging the space type inclined rods, transverse vibration of the short slings is reduced.The device can be arranged in the midspan of the suspension bridge and used for multi-directional damping of the midspan short slings.

The invention discloses a building anti-seismic crane support and a using method thereof, and relates to the field of building anti-seismic crane supports. The invention particularly relates to the building anti-seismic crane support and the using method thereof, aiming at the problems that in an existing device, only one damping structure is arranged, the damping effect is not ideal, the stability of the device is not firm, the use is not safe and reassurance, the design is not reasonable and the like, the following scheme is provided at present, building anti-seismic crane support comprisesa stand column, the lower surface of the stand column is fixedly connected with a connecting base, the lower surface of the connecting base is fixedly connected with a connector, one end of the connector is rotationally connected with a supporting rod, the upper end of the supporting rod is rotationally connected with a mounting head, the lower surface of the connector is fixedly connected with asupporting column, a damping base is fixedly connected to the side wall of one side of the supporting column, and a hollow structure is arranged inside the damping base. According to the invention, multiple damping structures are arranged, so that the damping effect is more ideal, the stability is good, the use is safe and reassurance, the design is reasonable, the installation is convenient, andthe use is convenient.

The invention relates to the field of medical technologies, and concretely relates to a medical oxygen cylinder moving and fixing apparatus. The apparatus comprises a fixing frame, a connecting part,a clamp, springs, fixing parts, a bottom plate, lifting devices and a bottom wheels, the connecting part is arranged on the front sidewall of the fixing frame, the clamp is arranged at the front sideof the connecting part, the springs are arranged on the inner wall of the clamp, the fixing parts are arranged at one ends of the springs, the bottom plate is arranged at the bottom of the fixing frame, the central part of the top of the bottom plate is provided with an arc-shaped concave pit, and the lifting devices are arranged at the left side and the right side of the fixing frame respectively. The apparatus is simple and convenient to use, and can fix an oxygen cylinder to avoid the dumping of the oxygen cylinder in the use process and reduce the shaking of the oxygen cylinder in the movement and use process; and the apparatus also can be easily moved and fixed, and is convenient for shifting the oxygen cylinder in the use process.

The invention discloses a bidirectional anti-fatigue short circuit for a drill column used in the drilling engineering of the petroleum industry, particularly used for air under-balance drilling. The bidirectional anti-fatigue short circuit mainly comprises an upper joint, a short circuit main body and a lower joint. The short circuit main body consists of a spline outer barrel, a damping piston, an oil cylinder, a spring outer barrel, an upper disc spring set, a spring rod, a lower disc spring set and a buffering rubber. The disc spring sets and the damping piston are connected in series so as to play a role in retarding or absorbing longitudinal vibration simultaneously; the buffering rubber outside a spline can play a role in retarding peripheral vibration to reduce the adverse effect of accidental torque on the drill column; and through aerodynamic finite element simulation analysis for a short circuit shell structure, a single-blade hyperboloid structure optimized at the joint can reduce the erosion effect caused by high-speed airflow during air under-balance drilling so as to prolong the service life, improve the work efficiency and effectively protect a drill bit and the drill column. The bidirectional anti-fatigue short circuit has the advantages of simple structure, easy manufacture, detachment and easy maintenance.

The invention provides a manual diamond wire cutting machine, comprising: a bed, a gear transmission device, a crank slider guide rod mechanism, a wire take-up and release device, a fixed supporting and floating pressing device, a wire transporting mechanism, and a fixed workbench. The working process of the whole machine is: the motor drives the driving gear to rotate, so that the two working gears with the same geometric size meshing with the upper and lower gears respectively rotate, and cranks with a phase difference of 180 degrees and equal eccentricity are installed on the working gears. The shaft is connected with the slider guide rod through the rolling bearing, which converts the rotary motion of the working gear into the linear reciprocating motion of the upper and lower slider guide rods. In the working section of the emery line, the non-metal plate is pressed by the floating pressing material and the fixed supporting device, so that the instantaneous forward movement distance and speed of the emery line installed on the guide rods of the upper and lower sliders are equal to the instantaneous backward movement distance and speed, and the alignment is completed. Reciprocating cutting of non-metallic workpieces.

An electric vehicle includes electric motors imparting driving forces to the corresponding driving wheels, a brake device imparting braking forces to the driving wheels, a control unit which calculates final target braking-driving forces (Tti) of the driving wheels and controls the electric motors and the brake device so that braking-driving forces of the driving wheels conform to the corresponding final target braking-driving forces. The control unit calculates longitudinal speeds (ΔVi) of the wheels relative to a vehicle body; calculates target correction amounts (Tt2i) of the target braking-driving forces for reducing in magnitude longitudinal speeds of the driving wheels relative to the vehicle body based on the relative longitudinal speeds; and corrects the target braking-driving forces (Tt1i) with the target correction amounts (Tt2i) to calculate final target braking-driving forces (Tti) of the driving wheels.

The invention provides a composite plate emery wire cutting machine. The composite plate emery wire cutting machine comprises a coordinate table, a wire conveying mechanism, a fixed holding device, a floating pressing vibration damper, a vacuum pump powder suction system and a digital program control system. According to the working process of the cutting machine, a to-be-cut nonmetallic plate is clamped through clamps on the coordinate table, a steel ball on the fixed holding device holds the nonmetallic plate, and a steel ball on the floating pressing vibration damper presses the nonmetallic plate so as to reduce vibration and frictional resistance of the nonmetallic plate during cutting; an emery wire deviation-proof device reduces transverse and longitudinal vibration during emery wire cutting; the wire conveying mechanism makes an emery wire move, the digital program control system operates a program to control the coordinate table to drive the clamp X and the clamp Y clamping a workpiece to move, and then the cutting shape of the machined workpiece is controlled; and nonmetallic powder generated during cutting is sucked and cleared away by the vacuum pump powder suction system always operating during machining.

The invention relates to the technical field of a prefabricated assembled concrete structure in civil engineering, and concretely discloses an earthquake-proof assembled concrete beam column connection method. The method comprises the following steps of (1) installing a prefabricated column; (2) installing an elastic gasket; (3) installing a prefabricated beam; (4) fastening screw bolts; (5) performing grouting in reserved holes; and (6) filling mortar into grooves. The connection method has the advantages that the high ductility of prestress bars, the elasticity of the elastic gasket, and thesupport force of screw bolts and a bracket are used for providing good earthquake-proof performance and shear strength for an assembled beam column connection joint.

The invention provides a compact vibration absorption device for an elevator effectively dampening vertical vibration of low frequency and being stored in an outside dimension of a car frame. The elevator comprises a car frame 6 vertically moving in a hoistway 1; a car 5 provided in the car frame 6; a guide rail 2 for guiding the vertical movement of the car frame 6 and provided so as to be vertically extended; and a hanging rope 3 for supporting and lifting the car frame 6 through a pulley 4 below the car provided at a lower part of the car frame 6. A vertically moving dynamic damper 10 is provided below the car frame 6.

A vibration reduction optimization method for host system of a tunnel boring machine to reduce the vibration of the host and prevent fatigue damage at the critical weak position of the TBM host system. Vibration reduction optimization of the TBM host system is achieved by using a damping alloy material to replace the cutterhead system's material and the connecting flange's material and adding a magnetorheological damper at the support system and the propulsion system. This prevents sudden incidents in the TBM host system and ensures that the TBM works safely and reliably.

The invention discloses a novel height adjustable square speed bump which comprises a base. A groove is formed in the base, a connecting column is fixedly connected to a bottom position in the base, the connecting rod is arranged in the groove, a non-Newton fluid shock absorbing ball is arranged in the connecting column, a transverse pressure plate is arranged at the upper end of the non-Newton fluid shock absorbing ball, a push rod is fixedly connected to the upper surface of the transverse pressure plate, a mounting plate is fixedly connected to the upper end of the push rod, a square speedbump main body is fixedly connected to the upper surface of the mounting plate, two oblique columns are rotatably connected to the bottom position in the base through a rotating shaft, chutes A are formed in the upper surfaces of the two oblique columns, a lower supporting column is slidably connected in each chute A, and an upper supporting column is arranged above the lower supporting column. The height of the novel height adjustable square speed bump can be changed, so that people feel more comfortable when an automobile passes through the novel height adjustable square speed bump, and thenovel height adjustable square speed bump is reasonable in design and long in service life.

The invention discloses an adjustable computer host protection holder which comprises a base, wherein a base groove is formed in the middle of the upper end of the base; a positioning rod is arranged in the middle of the bottom of the base groove; the outer side of the positioning rod is sleeved by a damping spring; a mounting base is arranged inside the bottom groove; a groove is formed in the lower part of the mounting base; a positioning rod groove is formed in the middle of the top of the groove; a computer host mounting groove is formed in the middle of the upper end of the mounting base; support plates are arranged at the front and rear parts of the upper end of the mounting base; moving plates are connected with the bottoms of the support plates; and chutes are formed in side walls of the computer host mounting groove. The mounting base collides with the bottom of the base groove, an effect of reducing longitudinal vibration is achieved due to the damping spring, and moreover, as two ends of the moving plates are in sliding connection with interiors of the chutes, the length of the computer host mounting groove can be adjusted, and thus computer hosts of different models can be placed inside the adjustable computer host protection holder.

The invention provides a secondary rock breaking drill bit for assisting pressurizing flow back through a spiral blade. The secondary rock breaking drill bit comprises a drill bit body, the blade anda cone; the blade is arranged at the top end of the drill bit body, and the blade and the drill bit body are of an integrated structure; and a gauge protection part is arranged on the outer wall of the blade. Through improvement for the rock breaking drill bit, primary cutting is conducted at the bottom of the drill bit to form primary rock debris, the rock debris returns to the cone under carrying flow back of a well-drilling fluid, the cone can conduct secondary breaking, the spiral blade slides in the longitudinal direction to be in surface contact with the well wall, a surface contact modeof the spiral blade is far greater than a line contact mode of a traditional straight blade, longitudinal vibration in the well-drilling process can be reduced, the rock debris generated by cutting of the drill bit flows back upwards under the action of vertical component force of the spiral face, fluid carrying the rock debris generates reactive force on the spiral blade surface, the drill bit can be pressurized, and thus the problems and deficiencies proposed in the background technology are effectively solved and overcome.

The invention relates to a device for feeding sheets to a sheet stack. In a delivery of a sheet-processing machine, in particular a printing press, provision is made for chain gripper systems for holding the sheets to be transported at the leading and trailing edges thereof. The holding devices are configured such that they can be displaced relative to one another for the purpose of format adjustment. The chain gripper system has a sprocket drive shaft and a sprocket deflection shaft for the chains of the chain gripper system. Here, provision is made for both the sprocket drive shaft and the sprocket deflection shaft to have a clutch.

The invention discloses a multi-chip band saw blade. The band saw blade comprises a saw blade body and saw teeth located on the saw blade body, 15 saw teeth arranged in sequence form a main tooth set,and each main tooth set comprises a first sub-tooth set, a second sub-tooth set, a third sub-tooth set, a fourth sub-tooth set and a fifth sub-tooth set; and each sub-tooth set comprises a first sawtooth, a second sawtooth and a third sawtooth which are arranged in sequence, the first sawtooth is a straight tooth, and the second sawtooth and the third sawtooth are separately a left dividing toothand right dividing tooth. By controlling the different heights of the teeth and controlling the tooth dividing amount, the tooth profile divides a chip into 18 chips during cutting, and the tooth profile can remarkably reduce cutting force in the cutting process and the cutting force in the saw cutting process; and the problems of oblique cutting, core digging, immovable cutting, intolerance to cutting and the like caused by excessive abrasion of tooth tips are avoided.

The invention discloses a main bearing cap of gas engine, which makes use of connection to connect various bearing caps together so as to form the whole main bearing cap. In the whole main bearing cap the rigidity of main bearing seat of die-casting body is improved greatly. Mechanical deformation, thermal deformation and portrait vibration of body are decreased. The rigidity of main bearing cap, coaxiality and Cylindricity of the hole of main bearing are improved at a great extent so as to improve the pressure-bearing ability of bearing and decrease the abrasion of friction pair. In addition, back oil seal seat is cast on the main bearing cap and a boss is cast on the lower of main bearing cap to install filtering so as to decrease the parts number of gas engine, decrease mechanical machining faces, decrease the production cost and improve the production efficiency.

The invention provides a road and bridge shock-proof support and a mounting method thereof, which belong to the technical field of road-bridge damping. The road and bridge shock-proof support comprises a base, shock-proof columns, a supporting plate and a shock-proof table. A plurality of grooves are formed in the length direction of the base; the length direction of the groove is perpendicular tothe length direction of the base; the shock-proof columns are arranged in the plurality of grooves; the shock-proof columns can move in the length direction and the width direction of the grooves; the shock-proof columns are used for reducing road and bridge shock; the supporting plate is arranged at the upper ends of the shock-proof columns and used for transmitting road and bridge shock to theshock-proof columns; the shock-proof table is arranged on the supporting plate and can slide on the supporting plate, the sliding direction of the shock-proof table is parallel to the length directionof the base, the upper end of the shock-proof table is connected with the road and bridge, and the shock-proof table is used for reducing road and bridge shock. The road and bridge shock-proof support and the mounting method thereof have the technical effects that various kinds of shock borne by a road and a bridge can be reduced, the road and bridge shock-proof performance is good, and the roadand the bridge are kept stable.