42results about How to "Reduce inertial load" patented technology

Configuration of a rear fuselage tail cone of an aircraft with an auxiliary power unit, whereby a fire compartment of the rear fuselage tail cone defines a housing for the auxiliary power unit in which the auxiliary power unit is housed laterally and asymmetrically with respect to a longitudinal axis (X) of the rear fuselage tail cone and the auxiliary power unit is directly fasten attached to a structural skin wall of the housing. Additionally, by struts or rods attached to opposite side and upper structural skin wall of the fire compartment.

An apparatus for mixing a liquid in a container in order to provide a homogeneous solution or suspension of the liquid in the container. In particular, the apparatus of this invention can be used to provide a homogenous dispersion of particulate material in a liquid medium.

A small-sized stepping motor in which its rotary shaft or an output shaft disposed on the output side of its rotary shaft is improved for the purpose of achieving size reduction and motor characteristics improvement. That is, a stepping motor (1) comprises a rotor (2) having a rotary shaft (3) and a permanent magnet (4), and a stator (6) having pole teeth (5) radially opposed to the permanent magnet (4), the rotary shaft (3) being made of aluminium or aluminium alloy. Further, an output shaft (3a) installed on the output side of the rotary shaft (3) so as to project from the stator (6) is made also of aluminium or aluminium alloy.

The present invention is directed to an optical system for measuring the rotation angle of rotatable object having a rotation shaft (2), which system comprises a reflective diffraction element (6) mounted on said shaft and a module that includes a radiation source (8) emitting a monochromatic beam (bo) towards this element and a radiation-sensitive detection structure (14, 16), the diffraction element is configured to project diffraction order images (18) of its pattern onto associated sections (50(1)-54(2)) of an annular grating structure forming part of the detection structure and the surface size of the diffraction element is smaller than 20% of the surface size of the annular grating structure.

A printing device reduces the load on the reel driver that drives a delivery reel. A controller drives a reel driver to turn at multiple drive speeds, including a minimum speed at which the circumferential speed of a media roll of the largest diameter is equal to, and a maximum speed at which the circumferential speed of a media roll of the smallest diameter is equal to, the conveyance speed of the media conveyor. When the amount of slack detected by a slack detector goes from between a first threshold and a second threshold that is less than the first threshold, to an amount of slack less than the first threshold, the controller changes the drive speed to one higher speed if the reel driver is not turning at the maximum speed, and stops the reel driver if the reel driver is turning at the maximum speed.

The invention discloses a charging and blanking robot of a punch press, comprising four joints, a base, two arms and an end effector, wherein the first joint, the second joint and the fourth joint have the degree of freedom of rotation, and the third joint has the degree of freedom of up and down translation; one end of the first joint is connected with the base by an input end shell; the other end of the first joint is connected with one end of the first arm by a first joint output flange; the other end of the first arm is connected with a second joint output flange of the second joint; a third joint connecting plate is connected with the joint rack of the fourth joint; and a fourth joint output rotary table is provided with the end effector. A harmonic transmission mode is adopted by a first joint transmission device and a second joint transmission device of the robot. Aiming at the characteristic that a harmonic speed reducer only can bear torque but can not bear bending moment, a pair of tapered roller bearings is arranged on an output shaft and is used for bearing overturning bending moment. The transmission mode has compact structure, high transmission efficiency, small return difference and high transmission accuracy.

The invention discloses a parallel mechanism with two-dimensional translation and two-dimensional rotation. The parallel mechanism comprises a fixed frame, a moving platform and four branched chains which are symmetrically arranged between the fixed frame and the moving platform and provided with a drive device respectively, wherein the four branched chains have two types of structures; the branched chain with one type of structure comprises a straight line guide rail, a drive block arranged in the straight line guide rail and a fixed-length connecting rod of which both ends are provided withrotary hinges; the branched chain with the other type of structure comprises a straight line guide rail, a drive block arranged in the straight line guide rail and a fixed-length connecting rod of which both ends are provided with spherical hinges; the four branched chains with the two types of structures are in crossed arrangement; one end of the fixed-length connecting rod is connected with themoving platform, and the other end of the fixed-length connecting rod is connected with the drive block; and the moving platform is connected with a main platform and a fork-shaped shaft, of which the axial lines are vertical to each other, by a rotary pair, and the main platform can rotate around the axial line of the fork-shaped shaft. The parallel mechanism has the advantages that: the structure is simple; the mode of motion is definite; the requirements on complicated holding-releasing operations are met; and because the connecting rod is the fixed length rod which helps to reduce the inertia load, the parallel mechanism has higher rigidity in different operational ranges, and the high-speed movement is easily realized.

The present invention discloses, in certain aspects, systems and methods for producing cyclical impacts and, in certain aspects for moving a drilling apparatus for drilling a borehole in a formation, the system in certain embodiments including a housing with a longitudinal axis and a movable member movably disposed therein and movable within the housing transversely to the longitudinal axis of the housing and positioned within the housing with a first space on a first side thereof and a second space on a second side thereof, the movable member substantially fluidly isolating the two spaces and movable to compress gas in one of the first space and the second space while decompressing gas in the other space so that a charge of compressed gas exits from the housing to move an impact member; e.g. for impacting a pile to be driven into the earth or for impacting a drill apparatus for drilling a wellbore, the movable member movable continuously to provide a series of impacts.

The invention belongs to the field of a robot for testing an overhead power transmission line and particularly relates to a rotary input robot for testing the oscillating performance of the overhead power transmission line. The robot comprises a frame and a tail end actuator, wherein one side of the tail end actuator is connected with the frame through a first branch and the other side of the tail end actuator is connected with the frame through a second branch I or a second branch II. Due to the adoption of the robot, not only can the rigidity of the robot be improved, but also the load capacity of the robot can be improved. The robot is beneficial for bearing a large load in the process of testing the oscillating performance of the transmission line. Particularly, the robot consisting of a parallel four-bar mechanism has a more obvious effect. The robot carries out rotary input by rotating an auxiliary driving robot and is convenient to install and place a revolute pair, so that the inertia load of the robot is reduced and the robot is more convenient to install and place. The tail end actuator of the robot does not have the rotating motion function and can only move in a plane, so that the complexity of programming a robot control program can be reduced.

The invention relates to a low-speed wind channel virtual flying test aircraft model designing method and belongs to the field of wind channel virtual flying test model designing. By the method, a control plane driving mode is optimized, and a model operation plane can be changed a control plane automatically to realize a model pneumatic / movement / control coupling function. Weight and inertial load of a model are reduced, balancing of center of mass of the model is realized in the aspect of structural design, and aircraft model reference center, model actual center of mass and virtual flying supporting mechanism rotating center are ensured to be coincident at the same time. The method meets requirements of processing techniques and test equipment, processing accuracy of the model meets requirements on virtual flying wind channel test data measuring accuracy, and the model is stable in running when being applied in virtual flying wind channel tests and convenient to mount and demount.

The invention discloses a heald frame of a full carbon fiber composite structure. The heald frame disclosed by the invention comprises an upper cross beam and a lower cross beam which are arranged in parallel, wherein a damping interlayer A is arranged inside the upper cross beam, the two ends of the upper cross beam are respectively connected with the upper end of a side baffle A and the upper end of a side baffle B, a damping interlayer B is arranged at a joint of the upper cross beam and the side baffle A, and a damping interlayer C is arranged at a joint of the upper cross beam and the side baffle B; the two ends of the lower cross beam are respectively connected with the lower end of the side baffle A and the lower end of the side baffle B, a damping interlayer D is arranged at a joint of the lower cross beam and the side baffle A, a damping interlayer E is arranged at a joint of the lower cross beam and the side baffle B, and a damping interlayer F is arranged inside the lower cross beam. The heald frame disclosed by the invention can effectively inhibit vibration of the heald frame in a loom production process, and an inertial load of the heald frame in a high speed state is greatly reduced.