34results about How to "Reduce wrap angle" patented technology

A track frame or undercarriage (12) is made to support a rubber track (10) on suitable guide rollers (13,18,19). A tensioning roller (18) is provided as part of the guide rollers (13,18,19) on the interior of the track (10) and is mounted on a pivoting bracket (24). The bracket (24) moves the tensioning roller (18) to a working position for creating tension in the track (10). An actuator (22) provides a known force on the bracket (24) to move the tensioning roller (18) to its working position, using a controlled pressure applied to the actuator (22). Drive sprockets (19) for the track (10) are mounted onto a drive case (20) that is mounted to the track frame (12) through pivoting linkages (40,42) such that the drive case (20) and the drive sprocket (19) can be held in a working position and retracted away from the track (10). The position of the tensioning roller (18) is maintained within set limits of retractions during use, by providing a stop (32,30) to limit the amount that the tensioning roller (18) can retract.

The invention relates to a lens system which is applicable to an LED street lamp and is matched with an LED illuminant for use to form light distribution with multiple Light beam angles and light intensities. A plane of light incidence of a lens in the system being close to the LED illuminant is a compound curved surface of an aspherical concave surface, and a light-emitting surface is a compoundcurved surface of an aspherical convex surface; the shapes of the incident surface and the emitting surface are determined by the luminescent properties of the LED illuminant and the requirement of the emergent ray; after the light ray emitted by the LED illuminant is refracted by the lens, facula formed on the irradiation surface within a certain distance has the characteristics of being comparatively long in the distance covered by the facula along one direction being vertical to the axes of the LED illuminant, being comparatively shorter in the distance covered by the facula along another direction being vertical to the direction, being symmetrical in the shapes of the faculas correspondingly to the axes of the LED illuminant, and taking on the distribution which is similar to rectangle. Similar plane isolux distribution curve shape as well as completely different maximum light intensity values of the light beam and half peak value light intensity light beam wrap angles can be obtained by the LED illuminant through different lenses, so that the lens system is especially suitable for the LED light fittings having the requirement of rectangle illumination scope.

The invention relates to a driving device and an exposure platform for optical inspection of materials outside the cabin. The driving device includes: a driving mechanism 2; a conical friction wheel is splined to the output shaft of the driving mechanism 2; a friction rod is connected to the conical friction wheel Friction fit; the conical outer peripheral side of the conical friction wheel abuts on the friction rod; the guide rail is set parallel to the friction rod; the load spring is sleeved on the output shaft of the driving mechanism 2 and clamped on the big end of the conical friction wheel and the other end of the slider assembly; the bottom of the bracket is installed on the second driving mechanism, one side of the bracket is installed with a guide rail arranged vertically to the guide rail, the bottom of one side of the bracket is installed with a driving mechanism, and the driving end of the driving mechanism is connected with Active wire rope winding wheel, a wire rope idler is installed on the top of one side of the bracket, and a wire rope tightening device is installed on the other side of the bracket. The present invention can meet the drive requirement of the optical inspection module under the special environment effect of the space.

The invention relates to a fiber manufacturing method which comprises the following steps: a master batch melt and a polymer support section melt are mixed and are cooled into a high-speed spinning pre-oriented embryo fiber after spinning, and then oiling is carried out; the high-speed spinning pre-oriented embryo fiber after oiling is made into a draw texturing silk fiber by adopting an intra-drawing heating fast-twist method, and then is oiled. The silver content of the fiber of the invention can reach 3-10 percent, the sterilizing rate is high, the ultraviolet blocking rate is high, the efficacy is lasting and safe, and no toxic or side effects exist; the fiber spinnability is good, and the indexes such as the fiber size, etc. accord with the first order standards of the national fiber; the water absorbability, the air permeability, the dying uniformity and the electric conductivity of the fiber are greatly improved, thereby increasing the drapability and the comfortableness of thefiber fabrics.

The invention provides a wire transmission structure, a surgical instrument and a surgical robot. The wire transmission structure includes a base, a first drive shaft, a second drive shaft, a third drive shaft, a first traction body group, a second traction body group, a swing wheel, the third guide piece and the fourth guide piece; the base has a symmetrical plane; each traction body group includes two traction bodies connected to a drive shaft, through the rotation of the drive shaft, it can drive the corresponding The two traction bodies move in opposite directions and are used to drive a joint movement of the end assembly of the instrument respectively. Furthermore, the first traction body group and the second traction body group respectively as a whole can move in opposite directions through the action of the two guides on the oscillating wheel, so as to drive the third joint movement of the end assembly of the instrument. Thus, the movement of the three joints of the end assembly of the instrument is driven by the four traction bodies, the transmission structure is simple, the space occupied is small, and the transmission efficiency is improved.

The invention discloses a machine-room-free elevator device. The machine-room-free elevator device comprises a traction machine, a carriage, a counterweight, at least one guide wheel, a group of traction ropes and a control cabinet, wherein the suspension ratio is 1:1, and the machine-room-free elevator device is characterized in that each traction rope consists of an elastic body forming a traction rope body and a plurality of independent carrier bodies which are arranged in the elastic body and parallel to the traction rope body. By increasing the traction friction coefficient, reducing a wrap angle and reducing the diameter of the traction wheel and the guide wheel, the height of the top layer is reduced as far as possible, so that the 1:1 elevator structure without a machine room has the practical value. In addition, the traction friction coefficient is controlled through the elastic body material on the outer layer of the traction rope, so that the wrap angle is controlled, and the height of the top layer is greatly reduced from two aspects by controlling the structure of the traction rope and controlling the diameter of the traction wheel and the guide wheel.

The invention relates to a conveying belt driving system mounted on an internal combustion engine which is provided with a reversible generator or a starting motor / generator, in particular to belt tensioning equipment of a hybrid electric vehicle. The belt tensioning equipment of the hybrid electric vehicle comprises a supporting disc, a first tensioning machine and a second tensioning machine, wherein the supporting disc is mounted at the front end of the starting motor / generator; the first tensioning machine and the second tensioning machine are mounted on the supporting disc; the two tensioning machines are similar in structure and each comprises a tensioning machine belt wheel and a tensioning arm; each tensioning machine belt wheel is mounted at one end of each tensioning arm; a pivot is arranged at the other end of each tensioning arm; each tensioning arm rotates around each pivot; each pivot is articulated with a shell; each shell and each tensioning machine belt wheel are positioned at the same side surface of each tensioning arm; a stopping device is arranged on each shell; each tensioning arm is provided with a check block matched with each stopping device.

The invention relates to a wire rope driving mechanism and an exposure platform for optical inspection of materials outside the cabin. The wire rope driving mechanism includes: a bracket; a guide rail installed on one side of the bracket; a wire rope tightening device installed on the other side of the bracket side; the driving device is installed on the bottom of one side of the bracket, and its driving end is connected with the active wire rope winding wheel; the wire rope idler is installed on the top of one side of the bracket; the wire rope is connected to the active wire rope winding wheel at one end The other end is wound around the wire rope idler and then connected to the wire rope tightening device; the bearing plate for installing the optical inspection module is slidably installed on the guide rail and connected to the wire rope. The invention provides a movement mechanism adaptable to the space environment, and can reduce the weight and volume to the greatest extent, and at the same time, it is convenient to install and operate on the ground, has high reliability and low failure rate, and can save uplink resources and cost.

The wallpaper printing system belongs to the technical field of mold printing machines, and includes a preheating mechanism, an embossing mechanism, a cooling mechanism, a tension mechanism, a winding mechanism and a frame, and the preheating mechanism includes a preheating cover and a heating roller. The cover is erected on the working surface of the heating roller; the embossing mechanism includes a pressure roller and a pattern roller; the pressure roller and the pattern roller are arranged in parallel and are located at the discharge port of the preheating mechanism; the preheating mechanism of the wallpaper printing system, which The oil heat is used to enter and exit on one side, which reduces the number of parts that exchange heat with the hot oil and improves the thermal efficiency; the preheating mechanism of this wallpaper printing system adopts the oil guide sleeve, which reduces the volume of the hot oil in the heating roller , thus speeding up the circulation speed of the hot oil, the temperature of the roller can be kept constant to the greatest extent.

The invention provides a backflow device for a centrifugal compressor and a centrifugal compressor with the same. The backflow device comprises a wall surface component, a blade connector, first-row blades and second-row blades. The wall surface component comprises gas supply openings. The blade connector is fixed to the wall surface component. The first-row blades include a plurality of first blades and are arranged on the blade connector. The second-row blades include second blades and are arranged on the blade connector. In the radial direction of the blade connector, the second-row blades are located on the inner sides of the first-row blades and each first blade is spaced from the second blade. The backflow device has the advantages that the gas separation phenomenon is reduced, the blade de-swirling effect is improved, the flow loss is reduced and the efficiency is increased; the wrap angles of the first-row blades and the second-row blades re reduced, so that the casting difficulty is reduced.

The invention relates to a multi-channel high-speed transmission bus cable used for aerospace, and a manufacture method thereof, and aims to solve the problems of poor structure stability and low compressive strength of an existing transmission bus cable. The manufacture method for the multi-channel high-speed transmission bus cable used for aerospace comprises the following steps of carrying outlapped insulation, sintering insulation, star twisting, weaving, inner sheath extrusion molding, transmission group star twisting, shielding cable manufacture and outer sheath extrusion molding. By use of the manufacture method for the multi-channel high-speed transmission bus cable used for aerospace, the defects that a traditional method needs to determine a lapping pitch through the external diameter of a conductor, lapping bandwidth, lapping band thickness and a target overlapping rate are overcome, the manufactured cable realizes high compatibility among multiple signaling protocols, meanwhile, the problem that attenuation is unstable since low-density tetrafluoroethylene generates laminating deformation during processing can be solved, and the cable can stably work under a severe environment.

The invention discloses a novel driving structure of an elevator. The novel driving structure comprises a driving motor, a dragging wheel connected with the driving motor, a lift car and a counter weight box. The driving motor and the dragging wheel are arranged in the counter weight box, and a steel cable led out from the top of the lift car upwards passes through two steering wheels sequentially to be connected with the top of the counter weight box. A transmission strip passes through the dragging wheel in the counter weight box, the upper end of the transmission strip is fixed on the top of an elevator shaft, the lower end of the transmission strip is fixed at the bottom of the elevator shaft, and the dragging wheel drives the counter weight box to move vertically along the transmission strip. The novel driving structure solves the installing problem of the driving motor and the dragging wheel and saves installing space. Simultaneously the driving motor and the dragging wheel serve as weights in the counter weight box, weights required to be configured are effectively reduced, and the cost is reduced.