80results about How to "Improve eccentricity" patented technology

An oil pump includes first and second control chambers, a biasing mechanism, and a changeover mechanism. The changeover mechanism connects the first control chamber with a drain portion when a valving element is in a first position, introduces a discharge pressure into the first and second control chambers when the valving element reaches a second position, and drains oil of the second control chamber to the drain portion and introduces the discharge pressure into the first control chamber when the valving element reaches a third position. The changeover mechanism changes from the first position to the second position, when the discharge pressure becomes higher than a pressure level at which the cam ring can move against a set load of the biasing mechanism, and is lower than a pressure level at which a biasing force of the biasing mechanism is increased in a stepwise manner.

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 seat reclining apparatus for a vehicle includes a first plate including internal gear teeth, a second plate including external gear teeth, a third plate including internal gear teeth, a fourth plate including external gear teeth, a shaft rotatably supported by the first and third plates, a first and second wedge members, a first cam pressing the wedge members to integrally rotate therewith, a support member arranged between the other one of the first and second plates and the third and fourth plates and engaging with the third plate and the fourth plate when an amount of eccentricity between the internal gear teeth and the external gear teeth reaches a predetermined level, and a second cam pressing the support member to integrally rotate therewith. The amount of eccentricity defined by the support member is smaller than that defined by the wedge members.

An internal combustion engine connecting rod, having an embodiment defining a hollow beam member and a process of manufacture are disclosed. The improvement substantially reduces beam tensile and compressive stress levels through application of elliptical and convex segment profile beam sections, conserving reciprocating and rotating connecting rod weight required in high performance engine applications.

In a dehydration control method of a drum washing machine capable of improving reliability of eccentricity sensing by sensing not only forward eccentricity but also diagonal eccentricity by performing eccentricity sensing at a low speed and a high speed respectively, the method includes a first step for accelerating a drum to a first rotational speed when a uniforming process is finished; a second step for measuring first eccentricity when the rotational speed of the drum reaches the first rotational speed; a third step for comparing the measured first eccentricity with a preset first reference eccentricity; a fourth step for storing the measured first eccentricity when the measured first eccentricity is less than the preset first reference eccentricity in the third step; a fifth step for accelerating the rotational speed of the drum to a second rotational speed and measuring a second eccentricity when it reaches the second rotational speed; a sixth process for comparing the measured second eccentricity with the stored first eccentricity; and a seventh step for performing a dehydrating process when the measured second eccentricity is less than the stored first eccentricity.

The invention relates to a precision cycloid decelerator, comprising rotating arms and eccentric sleeves fixed outside the rotating arms. The eccentric sleeves are connected with cycloid wheels through rotating arm bearings. The cycloid wheels are matched with needle tooth pins fixed on needle tooth shells. The plurality of eccentric sleeves fixed outside the rotating arms are arranged in a staggered way. The cycloid wheels outside the eccentric sleeves are classified into a reverse cycloid wheel set and a forward cycloid wheel set. The reverse cycloid wheels and the forward cycloid wheels are different in tooth number and provided with connection transmission holes. The reverse cycloid wheels and the forward cycloid wheels are connected through a connection shaft passing through the connection transmission holes. The needle tooth shells are classified into a fixed needle tooth shell and an output needle tooth shell. The reverse cycloid wheels are matched with fixed needle tooth pins fixed on the fixed needle tooth shell. The forward cycloid wheels are matched with following needle tooth pins fixed on the output needle tooth shell. By means of the design, the precision cycloid decelerator disclosed by the invention has the advantages of high precision, high efficiency, high rigidity, high bearing capability and long service life; and the precision cycloid decelerator is particularly applicable to being used in a heavy-load industrial robot.

A variable compression ratio device with connecting rod journals and eccentric sleeves comprises a crankshaft, a piston connecting rod assembly, eccentric shaft sleeve assemblies, transmission shaft and gear assemblies and a driver assembly, wherein the crankshaft is a disk crankshaft and comprises a crankshaft front-end journal, a first disk main journal, a plurality of connecting rod journals, a plurality of second disk main journals and a crankshaft rear-end journal. Each disk main journal is provided with one transmission shaft and gear assembly, the center line of each transmission shaft and gear assembly is not overlapped with that of the crankshaft, one eccentric shaft sleeve assembly is rotatably sleeved on each connecting rod journal and is connected with the corresponding transmission shaft and gear assembly by gears, and the driver assembly is connected with the transmission shaft and gear assemblies and drive the transmission shaft and gear assemblies to rotate, so that the eccentric shaft sleeve assemblies are rotated, and compression ratios of cylinders of engines are synchronously changed. The variable compression ratio device has the advantages of high crankshaft strength, high eccentric sleeve self-locking capacity, wide engine compression ratio adjusting range, high reliability and long service life.

The invention discloses a processing method for a crankshaft of a compressor. The crankshaft includes a bent shaft and a crank. The processing method includes: (1), processing magnitude of interference of the external diameter of the bent shaft and the bore diameter of the crank respectively to be delta min=0.173, delta max=0.208, and the external diameter size of the bent shaft is 50-60mm; and (2), heating a position where a crank pore is located to 500-600 DEG C by means of induction heating, inserting the bent shaft into the crank pore prior to cooling formation. By the arrangement, the magnitude of the interference of the bent shaft and the crank is increased, so that greater torque can be transmitted by the crankshaft, and greater load can be borne. Faults of high voltage piston-type compressors caused by the bent shaft and the crank moving correspondingly during actual use are greatly avoided.

Optical disc drives designed for reduced power consumption switch the supply voltage in three stages between first, second, and third power supplies, but the reduction in power consumption that is possible in the drive circuits with three stage switching control is limited. A drive output tracking signal is generated according to the waveform of the drive output that drives the focus and tracking actuators, and this drive output tracking signal is applied to a step-up type focusing and tracking power supply. The step-up power supply controls the fixed output according to the drive output tracking signal, and when the drive output is greater than the fixed output, control output that is greater than or equal to the fixed output and slightly greater than the drive output is generated. This control output is supplied to the focus and tracking drive circuits to produce drive output.

The invention relates to a coaxial light-guide optical fiber for a coaxial light-guide system, which is manufactured by distributing refractive indexes on the radius and is different from the prior optical fiber which is formed by distributing the refractive indexes on the diameter, wherein the refractive indexes of a circular shell and an axle center part which are coaxial with each other are the same; the center of refractive index distribution which is taken as the light-guide basis is shifted from an axle center to the radius of the optical fiber; and light is changed to be transmitted between the axle center and the circular shell which is coaxial with the axle center. Not only the novel orientation solves the problem that the refractive index distribution center of the prior optical fiber after manufacture is concave but also the luminous flux of the coaxial monomode fiber manufactured by the invention is larger than that of the prior monomode fiber, thereby increasing the communication distance. When the coaxial light-guide optical fiber is matched with an inner conductor and an outer conductor which are invented for coaxial power supply and are partitioned by a coaxial light source and a coaxial light tester which are formed by multilayered annular semiconductors, not only the problem of energy consumption when lateral emitting elliptical light sources are emitted into a circle core is solved but also the coaxial optical fiber, the coaxial light source and the coaxial light tester can be integrated into the perfectly photoelectrically matched coaxial light-guide system.

The invention discloses a novel mold structure for preventing materials from stacking at a mold opening. The novel mold structure comprises a mold core and a mold sleeve, wherein the mold sleeve is fixed on a machine head by virtue of a mold sleeve cover, and the extrusion concentricity is adjusted by virtue of a mold sleeve alignment screw; the mold core is fixed on a mold core seat, and the relative position between the mold core and the mold sleeve is adjusted by virtue of a mold core seat bolt; the mold sleeve comprises a mold forming area, a mold sleeve opening chamfer, a mold sleeve tapered area, a mold sleeve step area and a mold deformation area; the mold sleeve tapered area and the mold sleeve step area are arranged on the outer side of the mold sleeve respectively; the tapered mold deformation area is arranged on the inner side of the mold sleeve; the mold sleeve tapered area is connected with the mold forming area in a circular arc transition manner by virtue of the mold sleeve opening chamfer. By virtue of the design of layering and tapering the front section of the mold sleeve, the problem of separation of the materials at the mold opening in the extrusion process in the current cable industry is well solved, the problems that the surface of a cable is poor and unqualified products and waste products are produced due to material separation are solved, the quality of products is guaranteed, the production efficiency is improved, and the cost is reduced.

The invention discloses a vibration box of a brick making machine, which comprises a vibration box body fixed on a vibration platform, wherein two main shafts and two transmission shafts are arranged in the box body; one end of the two main shafts passes through the box body; belt pulleys are arranged at end parts of the main shafts; the main shafts and the transmission shafts are provided with a synchromesh gear respectively, and the synchromesh gears are meshed mutually; the rear ends of the two main shafts are provided with a flange plate respectively; and eccentric blocks are fixed on the synchromesh gears on the main shafts and end faces of both sides of the flange plates. When the vibration box operates, two main shafts of the vibration box are driven by a motor or a hydraulic motor through the belt pulleys to make synchronous reverse rotation, so that the vertical directional vibration of the vibration platform of the brick making machine and a casting box is realized. The vibration box has the advantages of large excentricity, small starting drag torque, quick vibration starting, short time of vibration starting and vibration stop and large exciting force.

The invention discloses a portable pruning device for fruit tree maintenance in ecological orchards, which comprises a fixed rod and a first tool holder. One side of the outer part of the fixed rod iswelded with a rotating frame, the inner side of the rotating frame is rotatably connected with a winding disc by a rotating shaft, a lifting slide rod is slidingly embedded into the fixed rod, the lifting slide rod is of a two-section structure, and a screw is welded between the two sections. The pruning device adopts a whole adjustable structure, which is not only convenient for the contractionand carrying of the pruning device, but also is convenient for the adjustment treatment of the overall height of the pruning device; at the same time, a pruning knife is F-shaped on the whole, which is convenient for the pruning treatment of the pruning knife, but also ensures the precision of the pruning treatment of the pruning knife; secondly, the winding disc rotating on the rotating frame ofthe fixed rod facilitates drawing and winding motion of a pulling rope, and at the same time, also prevents the contact damage of the pulling rope to the users; finally, the pruning knife adopts an inclined adjustable structure, which is convenient for the users to prune at different inclination angles, thus improving the applicability of the pruning device.

A mass balancing mechanism of an internal combustion engine, in which the mechanism includes a compensation shaft formed as a tubular carrier shaft having a mounting point for the radial mounting of the compensation shaft. The mechanism further includes an unbalanced mass joined to the carrier shaft. A needle roller bearing is used for a radial rolling bearing-mounting of the compensation shaft, with the needle rollers of the needle roller bearing being in rolling contact with the mounting point which is configured as an inner raceway and possesses a width which is variable in peripheral direction, so that, in a region situated diametrically opposite a load zone in whose peripheral region the inner raceway is loaded by the radial load of the unbalanced mass which rotates together with the compensation shaft, a width of the inner raceway is smaller than the length of the needle rollers and tapers clearly or is interrupted in peripheral direction. The tapering or interruption of the inner raceway is produced by one or more trough-shaped depressions formed locally in the carrier shaft.

The invention relates to an air cylinder self-resetting type hip joint test machine, which comprises a framework, wherein the framework consists of a top plate, a bottom plate and a strut, a support frame is arranged in the framework, a transmission shaft is fixedly arranged in the support frame, a lower cam, a worm wheel, a middle cam and an upper cam are sequentially arranged on the transmission shaft, a cambered surface bearing seat is arranged above the support frame, a spherical surface base seat anastomotic with the cambered surface of the cambered surface bearing seat is arranged on the cambered surface bearing seat, a solution basin is arranged on the spherical surface base seat, a joint head ball seat embedded in the spherical surface base seat is arranged in the solution basin, a moving platform fixed with the basin edge of the solution basin is arranged on the solution basin, the moving platform is respectively connected with three cams through a steel wire traction device and an air pressure transmission device, a hydraulic cylinder is arranged on the top plate, a piston rod of the hydraulic cylinder passes through the top plate, a temperature controller for controlling the temperature in the solution basin is arranged on the top plate, and a ball propping pin propping on the rotating shaft is arranged on the bottom plate. The air cylinder self-resetting type hip joint test machine has the advantages that the structure is compact, the price is low, the operation is convenient, and the practical movement work condition of the hip joint of the human body can be correctly simulated in test room environment.

A scanner (90) comprises a scanning unit (99, 99-1, 99-2) having an elastic element (101, 101-1, 101-2, 102, 102-1, 102-2), which extends between a base (141) and a deflection unit (142, 150), wherein the scanning unit (99, 99-1, 99-2) is set up to deflect light (180) at the deflection unit (142, 150) at different angles (901, 902) by means of torsion (502) of the elastic element (101, 101-1, 101-2, 102, 102-1, 102-2), a magnet (660) which is set up to generate a stray magnetic field, and an angular magnetic field sensor (662) which is arranged in the stray magnetic field and is set up to output a signal indicative of the torsion (502).

The invention discloses a three-axis free bending die and guiding mechanism matching optimization design method and belongs to the technical field of metal plastic forming. The optimization design method is characterized in that the matching form (stand-alone type or straight-line type) is changed into a spherical contact type. Compared with a traditional form, the movement of the bending die in the pipe forming process is more stable under the matching form, the rotating angle theta can be accurately controlled, and the minimum relative bending radius (R/D0) of the three-axis free bending equipment can be reduced to 2.5.

The invention provides a process using grinding-aid-free wet grinding and slurry grading to prepare superfine ground calcium carbonate and relates to the field of calcium carbonate production. The process specifically includes: preparing slurry, grading the slurry, dewatering, and drying. The process has the advantages that grinding aid adding is not needed, product pollution during product production is avoided, and a safety guarantee is provided for downstream products; separated coarse particles are ground in a circulating manner, slurry grading is achieved, the problem that domestic wet grinding slurry cannot be graded is solved, narrow product particle size distribution is achieved, and uniform product fineness is achieved.