38results about How to "Large displacement range" patented technology

The invention relates to double-grating displacement transducer. It includes displacement unit, displacement guiding unit, signal processing circuit, laser, double grating unit, and photo-electricity receiver. The double gratings unit is formed by movable and fixed ones. The displacement unit and displacement guiding unit form the rectilinear kinematic pair; laser emits laser beam into double grating unit to produce double grating interference; photo-electricity receiver is used to receive the interference fringe, transmit the electric signal into signal processing circuit. Compared with the single grating displacement transducer, the invention has better interference fringe and fringe voltage signal, suits for using higher subdivision to reach higher resolution. Only if the movable grating has good consistency in moving, it can realize good sized displacement range with 20mm, and 0.01um resolving ability.

The present invention relates to devices which operate on gradient optical forces, in particular, nanoscale mechanical devices which are actuable by gradient optical forces. Such a device comprises a waveguide and a dielectric body, with at least a portion of the waveguide separated from the dielectric body at a distance which permits evanescent coupling of an optical mode within the waveguide to the dielectric body. This results in an optical force which acts on the waveguide and which can be exploited in a variety of devices on a nano scale, including all-optical switches, photonic transistors, tuneable couplers, optical attenuators and tuneable phase shifters. The waveguide can also comprise a gap such that two cantilever bridges are formed.

A pedal device for an electronic percussion instrument is provided, wherein first and second detection means for detecting a rotation of a pedal by different methods are alternatively disposed in a base. The pedal has a pressing part on a lower surface side. The base includes a first portion located under the pressing part for supporting the first detection means, and a second portion located around the first portion for supporting the second detection means. The first portion supports the first detection means such that a first pressed part of the first detection means is disposed on a displacement trajectory of the pressing part that displaces with the rotation of the pedal, and the second portion disposes the second detection means such that a second pressed part of the second detection means is disposed on the displacement trajectory of the pressing part.

A winding machine (1) for winding coils (4), having at least one coil-body receptacle (2) providing a receiving space (5) for coil bodies to be wound and at least one winding-material feed (3) being configured to feed winding material into the receiving space (5). The at least one coil-body receptacle (2) comprises at least a first and a second receiving unit, wherein, in a first setting, using the first receiving unit, the winding machine (1) allows winding in accordance with a first winding technique and wherein, in a second setting, using the second receiving unit, the winding machine (1) allows winding in accordance with a second winding technique different from the first winding technique. The first and second winding techniques are selected from the group of winding techniques consisting of the coil-winding technique, the conventional needle-winding technique, the linear winding technique and the flyer-winding technique.

A mountain cross-country carrying and transporting vehicle comprises a first vehicle body and a second vehicle body which are arranged in the front-rear direction. The mountain cross-country carrying and transporting vehicle is formed by hinging the first vehicle body to the second vehicle body, the bending angle between the two vehicle bodies is controlled through the steering devices such as a steering engine and a hydraulic cylinder, the vehicle is made to swerve, the swerve radius is small, it is facilitated to drive in narrow mountains areas, the rear portion of a vehicle hopper cocks up, so that cargoes loaded inside the vehicle hopper can fall downward along a formed slope and toward the middle of the vehicle, the cargoes can get close to the middle of the vehicle as much as possible, the center of the whole vehicle can get close to the middle of the vehicle as much as possible, the stability when the vehicle drives on mountain roads is improved, when the vehicle climbs, the cargoes in the vehicle hopper do not slide backwards and fall out, and the safety of transportation is guaranteed.

The invention discloses an interference objective driving device. The interference objective driving device comprises a body, a mounting rack and a fixing rack. A through chamber is formed in the body, and an amplifying mechanism is arranged in the chamber and comprises arc metal frames arranged oppositely and metal plate frames which are integrally formed with the arc metal frames and arranged oppositely. The metal plate frames are arranged between the arc metal frames and are perpendicular to the arc metal frames. A piezoelectric ceramic element, a pre-tensioning jackscrew and a roll ball are also arranged in the chamber. The piezoelectric ceramic element is integrally connected between the metal plate frames, the pre-tensioning jackscrew is in threaded connection with the body, the roll ball is matched with the pre-tensioning jackscrew, and the roll ball abuts against the wall face of one side, integrally connected with the metal plate frames, of the piezoelectric ceramic element. According to the interference objective driving device, the amplifying mechanism is used for amplifying infinitesimal displacement of the piezoelectric ceramic element, and therefore a larger displacement range is obtained for the interference objective driving device.

A tensioner device, includes a housing defining a cylindrical bore. A plunger is disposed in the bore and has a non-cylindrical outer surface. A spring is engaged with the plunger for biasing the plunger in an outward direction and an oil passage is in communication with the cylindrical bore for delivering pressurized oil to the bore. The non-cylindrical outer surface provides hydraulic clearance areas between the plunger and the bore to provide improved damping without high damping force.

The invention discloses a dual-purpose wrist developer with an adjustable arm of the force. Extension rods are symmetrically arranged at two ends of a compression spring, the extension rods are fixedly connected with the compression spring, limiting rings are arranged on the outer rings of the extension rods, electronic pushing rods are arranged at the lower ends of the limiting rings, connectingheads are arranged at the tops of the electronic pushing rods, the top surfaces of the connecting heads are fixedly welded to the extension rods, extended rods are arranged at the bottoms of the connecting heads, the input ends of the extended rods are provided with controllers, and two ends of the extended rods are connected with the connecting heads and the controllers. According to the wrist developer, the displacement range of the extension rods can be effectively limited by the limiting rings, so that the compression spring is effectively protected from malfunction due to excessive deformation, the extending and shortening of the extended rods can be controlled by the controller, so that the effect of adjusting the arm of the force is achieved, when the extending lengths of the extended rods reach the maximum amount, the whole device can be used as an arm power exercising apparatus, the flexibility degree of the whole device is strengthened, and the structural practicability is improved.

The invention relates to the field of home decoration equipment, in particular to an indoor decoration device. The indoor decoration device solves the problems that a painting device is low in automation degree and working efficiency in indoor decoration in the prior art. The indoor decoration device comprises a fixing block for a painting mechanism, wherein the fixing block is arranged on a screwrod type lifting frame; the painting mechanism is arranged on the fixing block; a displacement line is parallel to the horizontal plane; a horizontal motor is arranged at one end of a screw rod; a horizontal sliding block is arranged on the screw rod and is connected with the painting mechanism; a pressure adjusting device is arranged between a painting roller of the painting mechanism and the horizontal sliding block in order to enable the painting mechanism to be attached to a treated wall tightly; and an automatic feeding mechanism is arranged at one side, away from the horizontal motor, of the fixing block. The indoor decoration device has the advantages that the position of the painting roller can be adjusted, and the adjusting frequency in working is reduced; and excessive feeding is avoided, the pressure between the painting roller and the wall is fixed, and the uniform painting is achieved.

A vertical-motion vibration isolator utilizes negative-stiffness-producing mechanism which includes a plurality of compressed flexures, each having a particular length in the compressed direction of the flexure and being oriented in a horizontal direction, wherein the plurality of compressed flexures are positioned relative to each other such that the length of each compressed flexure substantially overlaps the length of each of the other compressed flexures. At least some of the plurality of compressed flexures can be positioned in a stacked arrangement. The arrangement of compressed flexures forming a portion of the negative-stiffness mechanism can reduce the size of the isolator without compromising vibration isolation performance.

The invention discloses an electric submersible pump for a multistage dual-reverse-screw lifting split bearing structure, and the electric submersible pump mainly solves the problems that an existingoil-immersed pump is unstable in operation, is low in efficiency and is good in fluid conveying performance under complex working conditions such as high sand content and high gas content. The electric submersible pump is characterized in that the lower part of an upper joint (1) is connected with an upper outer barrel (11), the upper part of a lower joint (8) is connected with a lower outer barrel (12), at least two bearing straightening bodies (5) are arranged between the upper outer barrel (11) and the lower outer barrel (12), a stator (7) is connected between the bearing straightening bodies (5), a rotor (6) is arranged inside the stator (7), and the rotor (6) is connected on a main shaft (2); and a turning direction of a stator spiral blade inside the stator (7) is reverse to that ofa rotor spiral blade outside the rotor (6). The electric submersible pump for the multistage dual-reverse-screw lifting split bearing structure disclosed by the invention is suitable for performing mixing and transporting operation of oil, gas, water, sand and the like under bad well conditions such as high gas content and high sand content, is stable in performance, and is high in efficiency.