35results about How to "The transmission structure is stable and reliable" patented technology

The invention discloses a mixed-flow turbocharger variable nozzle ring comprising an active shifting fork (4), a shifting fork plate (3), driven shifting forks (14), driven shifting fork tapered gear shafts (15), vaned tapered gear shafts (5), a nozzle ring vane (8), rolling wheels (13), rolling wheel shafts (12), a mounting plate (1) and a vaned tapered gear shaft positioning sleeve (9). The working surface of the nozzle ring vane (8) is a two-dimensional or three-dimensional surface and concentric spherical surface, the center of the sphere is outside a turbine housing, the bottom and top faces of the nozzle ring vane can be sealed to the vaned tapered gear shaft positioning sleeve (9) and a turbine housing inner gas flow inlet (6) respectively, so that the end of the gas flow inlet matches with a turbine blade (11). The mixed-flow turbocharger variable nozzle ring can well match with turbine wheels of a mixed-flow turbocharger, so that gas flow in the passages of the mixed-flow turbocharger is well organized, the loss of the gas flow is reduced, and efficiency is improved; according to the low speed ratio of the mixed-flow turbocharger, better matching effect is realized accordingly.

The invention discloses a front and back four wheel driving tractor of a single speed changing box. The front and back four wheel driving tractor of the single speed changing box only needs to operate one speed changing box for performing gear shifting front wheel independent driving and front wheel and rear wheel same-gear driving, a synchronous output gear is added on a shaft II of a traditional speed changing box, a shaft VIII is increased simultaneously, a switching gear and a rear output gear are arranged on the shaft VIII, and the two driving modes of front wheel independent driving and front wheel and rear wheel same-gear driving can be achieved. The front and back wheel driving tractor of the single speed changing box solves the problem that the tractor is poor in gradeability, the tires can slip under loading and parts can be damaged due to different gears and is particularly suitable for using in severe environments of mountains, slopes, forestry, pasture, roadlessness areas and the like.

The invention discloses a multifunctional chain-free integration power output assembly for a dense frame. The multifunctional chain-free integration power output assembly comprises an output shaft, and further comprises a multifunctional complex conversion transmission device. The multifunctional complex conversion transmission device comprises a polygonal input shaft, a conversion reset gear mechanism arranged between the polygonal input shaft and the output shaft and a conversion control mechanism arranged between the conversion reset gear mechanism and the polygonal input shaft. The multifunctional chain-free integration power output assembly for the dense frame is simple, scientific and reasonable in structural composition, integrates speed change and brake locking and can achieve a variety of transmission functions, and the power input and output speed change transmission structure and method carried out on the same axis by the multifunctional chain-free integration power output assembly have high transmission efficiency.

The invention discloses a paper shredder for large-scale surface flow field measurement. The paper shredder comprises a case (1), a drive motor which is installed outside the case (1), and a paper cutting mechanism, a paper storage mechanism and a paper output mechanism which are driven by the drive motor. A bottom plate (2) is arranged at the bottom of the case (1). The paper cutting mechanism includes a positioning seat (3) arranged in the case (1). A paper inlet (a) and a paper outlet (b) for paper to pass through are reserved between the bottom edges of the two sides of the positioning seat (3) and the bottom plate (2). The paper shredder can be erected on a river channel to realize uniform distribution of paper scraps. If there is a need to scatter a large number of paper scraps all at once, the paper shredder can be dragged at constant speed to scatter a large number of paper scraps. The overall transmission structure is stable and reliable. The overall mechanical failure rate is low.

The invention discloses a centrifugal pump for conveying a viscous medium. The centrifugal pump is mainly characterized in that a static ring assembly for mechanical sealing of the centrifugal pump is composed of a static ring base, a static ring, a static ring base sealing ring, a corrugated pipe assembly, a corrugated pipe front end ring sealing ring, a corrugated pipe rear end ring sealing ring, a compensation spring, a static ring sleeve and a gland; and the columnar compensation spring is installed on the outer circle of the static ring sleeve. The left end pressure of the columnar spring acts on a corrugated pipe front end ring, the corrugated pipe is a large-spacing corrugated pipe, mechanical sealing parameters are set, and the columnar compensation spring is sealed and protected. The corrugated pipe and the columnar spring are combined to provide compensation force, and the phenomenon that the medium forms condensation products in wave plate grooves to affect the telescopic change of the corrugated plate grooves is not likely to occur. The moving end face following fitting performance of the compensation static ring is not affected, the working condition using requirements that the medium viscosity is larger than 10000 CPS, the temperature reaches 275 DEG C and the pressure reaches 2 Mpa can be fully met, the mechanical sealing effect of the centrifugal pump is improved, and the service life of the centrifugal pump is prolonged.

The invention discloses a transmission structure applied to an endoscope. The transmission structure is arranged in an endoscope handle and comprises an upper gear module and a lower gear module; theupper gear module is located at the lower end of a handle control part, the lower gear module is located at the upper end of a handle replacement part, the upper gear module is connected with an operation handwheel, the lower gear module is connected with an upper chain wheel of the endoscope, and the upper gear module and the lower gear module are connected and fixed through a connection structure so that the connected upper gear module and lower gear module can drive the upper chain wheel to rotate when a user rotates the operation handwheel. The transmission structure makes the handle control part and the handle replacement part easily disassembled and firmly and reliably connected, and meanwhile the transmission structure is reliable and simple, high in accuracy and small in space occupancy. In addition, the invention further provides the endoscope handle.

The invention discloses a rotor wing propelling device and a control method. The rotor wing propelling device comprises an upper power mechanism, a lower power mechanism, a middle shaft inclination driving assembly, an upper vector inclination rotor wing assembly and a lower vector inclination rotor wing assembly. According to the rotor wing propelling device and the control method, the rotor disc of the rotor wing is directly subjected to inclined control, the structure is relatively simplified, the number of parts is relatively small, and control is simpler. Compared with a common vector rotor mechanism, the rotor mechanism is higher in maneuverability, faster in response and higher in efficiency.

The invention relates to a spiral ball speed reducer and belongs to the field of speed reducers. A base is fixed to the ground or a fixing part, an input shaft assembly is arranged on an input shaft groove of the base, and an output shaft assembly is arranged on an output shaft core of the base; the input shaft assembly and the output shaft assembly are limited in the radial direction through the outer edge of the base and the outer edge of the output shaft assembly respectively, friction is reduced through contact of deep groove ball bearings and the inner side face of the outer edge of the output shaft assembly, and balls in the input shaft assembly is meshed with a spiral slideway in the output shaft assembly to achieve a universal pure rolling transmission mode; and the base and the output shaft assembly are connected through a limiting connecting assembly for axial limiting, an movable limiting rings can rotate relative to supports. The spiral ball speed reducer has the advantages that meshing transmission of the balls and the spiral slideway is adopted, friction between the balls and the spiral slideway is greatly reduced through the universal pure rolling transmission mode of the balls, friction is further reduced through the movable limiting rings capable of rotating relative to the supports, abrasion and heat production are reduced, and the service life is prolonged; and no return difference exists and the precision is high.

The invention discloses a thread take-up mechanism of an industrial sewing machine, and relates to the technical field of thread take-up mechanisms of sewing machines. Specifically, the thread take-upmechanism comprises a base, a four-bar linkage mechanism, a thread take-up device, a thread arranging device and an adjusting device, wherein the four-bar linkage mechanism is mounted above the base;a fourth connecting arm is connected to one side of the upper part of the four-bar linkage mechanism; the thread take-up device is mounted on the fourth connecting arm; the thread arranging device ismounted on the other side of the upper part of the four-bar linkage mechanism; the bottom driving end of the four-bar linkage mechanism is connected with the adjusting device; the thread arranging device comprises a mounting frame, connecting rods, a thread arranging frame and a thread arranging plate; the connecting rods are mounted in the centers of the outer walls of the two sides of the mounting frame; vertical plates are vertically welded to the two sides of the upper part of the thread arranging frame; and a thread twisting mechanism is composed of a seat cylinder, a movable column anda curved sponge bar. According to the thread take-up mechanism of the industrial sewing machine, the thread arranging device is arranged, so that the problems that weaving threads are easily wound andknotted and fluffs around thread bodies of the weaving threads are relatively numerous are solved.