30results about How to "Short axial distance" patented technology

An image-taking lens apparatus has an image sensor for converting an optical image of a subject into an electrical signal and an image-taking lens system for forming the optical image on the image sensor. The image-taking lens system includes a prism for bending the optical path, and the refractive index of the prism fulfills a prescribed conditional formula.

The invention provides a contra-rotating rotary-jetting engine which can remarkably raise heat efficiency and reduce pollutant emission, manufacturing cost as well as maintenance cost. The engine works by utilizing a principle that a rotary jet turbine of the engine ejects fuel gas at high speed from a tangential spout to allow the self of the rotary jet turbine to rotate reversely so as to convert fuel gas internal energy into mechanical energy; meanwhile, the engine also utilizes a tangential impact turbine to recycle the kinetic energy of the fuel gas ejected from the rotary jet turbine, utilizes a heat regenerator to realize regenerative cycle, adopts a contra-rotating axial flow and contra-rotating centrifugal pressure gas technique to obtain high total pressure ratio, adopts a rotary flame tube technique to obtain high fuel gas temperature in front of the turbine, adopts the novel structural design to greatly reduce the number of components and the consumption of precious materials, and adopts a power confluence mechanism of a cone gear and an overrunning clutch to realize the power confluent output of the mechanical energy of the rotary jet turbine and the tangential impact turbine. Therefore, the engine has high energy conversion efficiency, low manufacturing cost and pollutant emission.

The invention discloses arrangement of a 6AT power drive system, belonging to the field of vehicle manufacture. A shell, a power input shaft, a speed shifting mechanism and a gear shifting part are provided, wherein the speed shifting mechanism comprises an input planetary gear set, an output planetary gear set and a counteraction planetary gear set; the gear shifting part comprises a first clutch, a second clutch, a one-way clutch, a first brake, a second brake and a third brake; the first clutch and the second clutch are axially and symmetrically arranged at the rear end of the speed shifting mechanism in parallel; and the one-way clutch, the first brake, the second brake and the third brake are compactly arranged outside the speed shifting mechanism. The technical scheme has the advantages of ensuring compact structure and short axial distance of the speed shifting mechanism by compactly arranging the gear shifting part around the speed shifting mechanism, reducing the varieties of parts by symmetrically arranging the first clutch and the second clutch, lowering the design cost and effectively preventing the error installation when in assembly.

The invention discloses a three-channel microwave rotary joint which comprises a single-waveguide rotor, a double-waveguide rotor, a double-waveguide stator, a single-waveguide stator, a first bearing, a second bearing, a first connection arm, a second connection arm, a first inner conductor, a second inner conductor and a third inner conductor. According to the three-channel microwave rotary joint, the axial distance is short, the signal transmission loss is reduced, the problem of multi-channel Ka frequency band signal transmission is solved, the transmit-receive insulation degree is good, double-bearing design is adopted, coaxiality is guaranteed through precise machining and assembling, electrical performance fluctuation generated in the rotating process is greatly lowered, and the reliability of spacecraft moving components is improved.

The invention discloses a 3D printer wire feeding structure. The 3D printer wire feeding structure comprises a fixed base; the fixed base is connected with a wire feeding motor; a cavity is formed in middle of the fixed base; a wire feeding driving wheel is arranged on one side in the cavity, and a driven wheel structure is arranged on the other side in the cavity; the driving wheel is connected with a driving wheel shaft; the driving wheel shaft is supported on the inner wall of the cavity of the fixed base through a bearing; the driven wheel is connected with a driven wheel shaft; a printing wire channel is formed in the fixed base in the perpendicular direction; the driven wheel shaft is connected with a driven wheel shaft horizontal position adjusting structure; and the driving wheel is matched with the driven wheel to convey printing wires to a printing head part. The 3D printer wire feeding structure is simple and compact in structure, is convenient for disassembly, replacement and maintenance, can conveniently and precisely adjust a shaft distance between the driving wheel and the driven wheel through the horizontal position adjusting structure, and can reliably convey the printing wire materials to a melting position of the printing head part for timely melting to satisfy the printing requirements.

The hydraulic cylinder having a portion on a side of a lip tip end of an annular clearance between an inner circumferential face of a shaft hole of a cylinder and a piston is made up of a minute clearance in order to suppress protrusion of the lip, wherein an annular clearance area for suppressing occurrence of the cavitation and for shortening an axial distance of the annular clearance portion made up of the minute clearance is formed on an opposite side of the annular clearance portion from a mounting groove.

The invention provides an impeller built-in type high-speed centrifugal pump which comprises a shell and a rotating wheel. The rotating wheel is rotatably mounted in the shell. The impeller built-in type high-speed centrifugal pump is characterized in that the impeller built-in type high-speed centrifugal pump further comprises a motor stator and a motor rotor, the motor stator is mounted on the shell, the motor rotor is fixedly connected with the rotating wheel, the rotating wheel comprises an inducer and a centrifugal impeller, an outer ring is arranged on the edge of the outer side of the inducer, and the outer ring of the inducer is fixedly connected with the inner circle of the motor rotor; the motor stator is electrified, so that the motor rotor rotates; the centrifugal impeller andthe inducer rotate synchronously; and the rotating speed of the rotating wheel is not lower than 2800 r / min. The problem that the water outlet direction of a traditional centrifugal pump is perpendicular to the rotation axis of the pump is solved, meanwhile, the structural size of the traditional centrifugal pump is reduced, the axial force of the rotor is reduced, and the requirements of high-speed navigation devices such as torpedoes for high lift, large flow, stable operation and compact structures of water jet propulsion pumps can be met.

An injection device includes a drive mechanism, and the drive mechanism in turn includes a drive rod being axially moveable, a plunger rod being axially moveable, and a gear assembly. The gear assembly is arranged such that an axial movement of the drive rod generates an axial movement of the plunger rod. This allows for a force transmission between the drive rod and the plunger rod, facilitating the expelling of viscous substances from the injection device.

The invention discloses an efficient long-runner impeller low-specific-speed centrifugal pump. The efficient long-runner impeller low-specific-speed centrifugal pump comprises a centrifugal impeller, an inducer, a transmission shaft, a centrifugal pump shell and sealing structures; the centrifugal impeller and the inducer are in rigid connection; the centrifugal impeller and the inducer are coaxial with the transmission shaft; the centrifugal impeller comprises a front cover plate and a rear cover plate which are in single-arc transition; and the sealing structures are arranged on the outer side of the front cover plate and the outer side of the rear cover plate correspondingly. According to the efficient long-runner impeller low-specific-speed centrifugal pump, the axial length is properly increased, the blade angle distribution of the centrifugal impeller is smoother, the inlet impact loss of the centrifugal impeller is reduced, the work efficiency of the low-specific-speed centrifugal pump is obviously improved, and the problem that due to the long and narrow runner characteristic of the low-specific-speed centrifugal pump, the impeller disc friction loss and the inlet impact loss of the low-specific-speed centrifugal pump are large, and consequently the efficiency of the low-specific-speed centrifugal pump is low is solved.

The invention relates to an arrangement structure of a gear shaft system of a gearbox. The arrangement structure comprises an input shaft as well as a first output shaft and a second output shaft which are in parallel with the input shaft and are arranged at the two sides of the input shaft, wherein driving gears are fixed on the input shaft; driven gears are sleeved on the output shafts in an idle manner; the driving gears are meshed with corresponding driven gears and drive the driven gears to rotate; at the same time, the first and second output shafts are provided with joint devices which are matched with the driven gears and are used for switching gears; and the first and second output shafts are driven by the joint devices to rotate to output power. Compared with the prior art, the arrangement structure has the following beneficial effects: the arrangement of the inner space of the gearbox is balanced and reasonable; the number ratio is easy to match; and the axial distance is shorter.

The invention relates to a transmission (G) for a motor vehicle, comprising a drive train oriented transversely to the direction of travel of the motor vehicle, the transmission (G) comprising at least two gear-forming planetary gear sets (1, 2), at least one brake (B) and two clutches (C, E), wherein the first clutch (C) is connected with a first element (11) of the first planetary gear set (1),the second clutch (E) is connected to at least one element (12, 32) of the second planetary gear set (2), and the brake (B) is connected with a second element (31) of the first planetary gear set (1).The two clutches (C, E) are axially arranged between the first and second planetary gear sets (1, 2), the second clutch (E) being arranged axially directly adjacent to the second planetary gear set (2), and the first planetary gear set (1), out of all of the gear-forming planetary gear sets (1, 2, 3, 4) of the transmission (G), has the largest axial distance from the front side of the transmission (G), that has an interface for connecting the transmission (G) to a drive unit (VM) on the outside of the transmission. The two clutches (C, E) are arranged axially directly adjacent to each other,and the brake (B) is arranged, at least in sections, radially outside the second clutch (E), The invention also relates to a drive train for a motor vehicle comprising such a transmission (G).

The invention discloses a three-channel microwave rotary joint which comprises a single-waveguide rotor, a double-waveguide rotor, a double-waveguide stator, a single-waveguide stator, a first bearing, a second bearing, a first connection arm, a second connection arm, a first inner conductor, a second inner conductor and a third inner conductor. According to the three-channel microwave rotary joint, the axial distance is short, the signal transmission loss is reduced, the problem of multi-channel Ka frequency band signal transmission is solved, the transmit-receive insulation degree is good, double-bearing design is adopted, coaxiality is guaranteed through precise machining and assembling, electrical performance fluctuation generated in the rotating process is greatly lowered, and the reliability of spacecraft moving components is improved.

The invention relates to an arrangement structure of a gearbox gear shaft system. The structure comprises an input shaft, and two output shafts which are parallel to the input shaft and are positioned on the two sides of the input shaft, wherein the input shaft is fixedly provided with driving gears; driven gears are sleeved on the output shafts and are meshed with the driving gears; a fourth driven gear and a sixth driven gear are meshed with a fourth and sixth driving gear simultaneously; a third driven gear and a fifth driven gear are meshed with a third and fifth driving gear simultaneously; and a reverse gear connecting device is arranged on one output shaft. Through the structure, an inner space is reasonably utilized, a synchronous connecting device has enough installation space, axial positions are approximately the same, the structure has a balanced layout, and the axial distance is short.

An integrated motor end cover comprises an end cover body and further comprises two groups of inductor fixing clamps integrally formed with the end cover body, a wire outlet clamp and four groups of concave guide rails for installing electric brushes. The middle of the end cover body is provided with a fixing column or a bearing chamber for fixing a motor shaft, the circumference of the end cover body is provided with three hole columns for penetrating mounting screws, the end cover body is provided with a plurality of heat dissipation holes, a plurality of reinforcing ribs and two grooves for installing grounding pieces, the fixing column is provided with reinforcing ribs, a spring is embedded in the fixing column, strength of the position is improved, and the risk of cracking of plastic entering a shaft can be reduced. The integrated motor end cover has the advantages of high integration degree, less parts and materials, light weight, small size, short axial distance, good heat dissipation, high reliability and long service life.

The invention relates to an arrangement structure of a gear shaft system of a gearbox. The arrangement structure comprises an input shaft as well as a first output shaft and a second output shaft which are in parallel with the input shaft and are arranged at the two sides of the input shaft, wherein driving gears are fixed on the input shaft; driven gears are sleeved on the output shafts in an idle manner; the driving gears are meshed with corresponding driven gears and drive the driven gears to rotate; at the same time, the first and second output shafts are provided with joint devices which are matched with the driven gears and are used for switching gears; and the first and second output shafts are driven by the joint devices to rotate to output power. Compared with the prior art, the arrangement structure has the following beneficial effects: the arrangement of the inner space of the gearbox is reasonable; the number ratio is easy to match; and the axial distance is shorter.

The invention discloses an outer-rotor submersible tubular pump which comprises a guide vane body, an impeller housing, an outer rotor, a water filling type submersible motor stator and a water sucking chamber. The outer rotor is of an integrated structure and comprises a water filling type submersible motor rotor, a hub body and an impeller. An impeller is welded and fixed to the water filling type submersible motor rotor, and the water filling type submersible motor rotor is rigidly connected with the hub body to form a whole. The water filling type submersible motor stator is built in the inner cavity of the outer rotor. The whole structure of the pump has the advantages of being short in axial distance, compact in structure, light in weight, safe, reliable and the like, the water filling type submersible motor stator is creatively built in the inner cavity of the motor rotor, meanwhile the phenomenon that rotation of an integrated rotor of a submersible electric pump with a built-in impeller in water causes larger frictional loss is avoided, and the water pumping efficiency is greatly improved.

A fuel injector for internal combustion engines, comprising: - a housing (16), - a valve guide (38) fixed at a lower end of said housing (16), the valve guide (38) having a longitudinal guide bore (44) and a chamber (46) provided with a valve seat (50), said chamber (46) being connected to a fuel supply duct (22,48); - an atomizer (56) fixed at a lower end of said valve guide (38), the atomizer (56) having a longitudinal bore (80) in flow connection with said chamber (46), the atomizer having a plurality of nozzle bores (82) having inlet openings (84) facing into said longitudinal bore (80); - a spindle (88) having a valve portion (92) cooperating with said valve seat (50), and a cut-off element (94) extending into said longitudinal bore (80) of the atomizer (56), wherein an upper cut-off section (102) and a lower cut-off section (106) axially spaced apart from each other are defined between the outer surface of the cut-off element (94) and the inner surface of the longitudinal bore (80), cut-off sections (102,106) being both closed in the closed position of the spindle (88), the cut-off element (94) having a central duct (112) in flow connection with the longitudinal bore (80) of the atomizer (56) both above the upper cut-off section (102) and below the lower cut-off section (106).

The invention discloses a delta 3D printer. The delta 3D printer comprises three vertical columns with sectional material structures, a control panel, a switching power supply, a display screen and a printed finished product connection seat, wherein an upper support plate is arranged at the upper ends of the vertical columns with the sectional material structures; a lower support plate is arranged on the lower parts of the vertical columns with the sectional material structures; a wire feeding motor is arranged on the upper support plate; printing head drive motors are arranged on the upper end surface of the lower support plate; each printing head drive motor is connected with a printing head connection disc; each printing head connection disc is connected with a slide block with linear bearings through parallel arms; each linear bearing is matched with a vertical polished rod; the upper end of each vertical polished rod is connected with the upper support plate, and the lower end of each vertical polished rod is connected with the lower support plate; a support with a bent structure is arranged on the upper end surface of the lower support plate; the control panel is horizontally connected with the support; the display screen is connected with the support; and the printed finished product connection seat is connected with the vertical columns with the sectional material structures. The delta 3D printer disclosed by the invention is low in manufacturing and maintenance costs, convenient to disassemble and assemble, convenient to adjust and repair, high in use safety and reliability, and easy to ensure the quality of the printed products.