58results about How to "Shorten shaft length" patented technology

An aircraft gas turbine engine (110) comprises first and second non-coaxial propulsors (113a, 113b), each propulsor (113a, 113b) being driven by a common gas turbine engine core (176) comprising a propulsor drive turbine (143) arranged to drive the first and second propulsors (113a, 113b) via a propulsor drive coupling (127). The core (176) further comprises a first core module (190) comprising a first compressor (129) and a first turbine (131) interconnected by a first shaft (177), and a second core module (191) comprising a second compressor (128) and the propulsor drive turbine (143) interconnected by a second shaft (127), the first and second core modules (190, 191) being axially spaced.

The present invention relates to a utility iron which is characterized in that it has a lie angle of 58 to 64°, a loft angle of 20 to 28°, a head weight of 270 to 300g, and a shaft length of 35 to 38 inches. Thus, the loft angle is relatively reduced so as to prevent a golf ball from being hit high and increasing flight distance. Also, because the lie angle is relatively increased, the possibility of a hook or a slice occurring is reduced. Because the weight of the head is increased, repulsive force is augmented by the striking of the golf ball, which relatively increases the flight distance of the golf ball. Because the length of the shaft is relatively shortened, swing trajectory is reduced, and accurate striking is made easier so as to also increase flight distance.

An axial force balancing structure of a centrifugal closed impeller comprises a sealing ring which is arranged between an impeller cover and a housing and near the outlet of the centrifugal closed impeller, an impeller inlet seal arranged near the inlet of the centrifugal closed impeller, and a housing inlet formed in the housing, wherein the impeller cover, the housing, the sealing ring and the impeller inlet seal form a cavity; a high pressure medium is introduced into the cavity from the outside through the housing inlet; the pressure of the high pressure medium is higher than the medium pressure at the outlet of the centrifugal closed impeller. The axial force balancing structure can balance an existing axial force from an impeller disc to the impeller cover of the centrifugal closed impeller; the axial force balancing structure does not affect flowing of the medium inside the centrifugal closed impeller, so that the efficiency of an impeller is not affected; the axial force balancing structure does not increase the axial length; the high pressure medium can be from the medium at an outlet of a pressure expander behind the centrifugal closed impeller, so that a risk of medium leakage is avoided; the axial force balancing structure is simple in structure and easy to implement.

The invention discloses a vehicle hybrid power system and a control method thereof. The system involves an engine, a hybrid power module and a double-input-shaft speed change mechanism, wherein the hybrid power module is composed of a motor, a planetary gear train and a first clutch, the planetary gear train is provided with at least three rotating shafts, the three rotating shafts comprise a rotating shaft X1, a rotating shaft X2 and a rotating shaft X3, axes of the three rotating shafts are on one straight line, the rotating speed of the rotating shaft X2 is between the rotating speed of therotating shaft X1 and the rotating speed of the rotating shaft X3, a first clutch is arranged between any two of the three rotating shafts, a power output shaft of the engine is connected with the rotating shaft X3 or the rotating shaft X1 of the planetary gear train and a second input shaft of the double-input-shaft speed change mechanism, a rotor of the motor is connected with the rotating shaft X1 or the rotating shaft X3, and the rotating shaft X2 is connected with a first input shaft of a double-input-shaft gearbox. According to the system and the method, the transmission efficiency is high, multiple gears are provided, the three-axis double-freedom-degree planetary gear train is introduced, a vehicle is driven to start by the differential between the engine and the motor, starting of the vehicle is stable, the smoothness of gear shifting is good, and the impact of gear shifting is small.

A track roller assembly may have a track roller, a roller shaft and collars press fit onto either end of the roller shaft to retain the track roller on the roller shaft with an axial clearance between the collars and the track roller. During assembly, the collars may be press fit onto the shaft ends and forced axially inwardly until further axial movement of the collars is prevented by engagement shoulders of the track roller. A compressive axial load may be applied to the roller shaft to reduce a shaft length of the roller shaft and to cause the roller shaft to slide inwardly relative to the collars. The compressive axial load is removed from the roller shaft so that the roller shaft extends back to the normal shaft length and the collars move axially farther apart as the roller shaft extends back to the normal shaft length.

The driving device is provided with a motor, a pinion, a first gear, a second gear, and a frame. The frame has a motor side surface and a gear side surface, and includes a first portion and a second portion. A motor housing of the motor is fixed to and supported at the motor side surface of the first portion. A motor shaft extends from the motor housing, penetrating the first portion from the motor side surface to the gear side surface. The pinion is fixed to the distal end of the motor shaft at the gear side surface. The first gear and the second gear are coaxially disposed and rotatably supported at the gear side surface of the second portion. The driving force of the motor is transmitted to the first gear and the second gear through the pinion. The gear side surface of the second portion is offset toward the motor side than the motor side surface of the first portion.

The invention discloses a pedal of an electric folding vehicle. The pedal of the electric folding vehicle is characterized in that the pedal is provided with a folding shaft, the folding shaft is provided with symmetric threaded tracks opposite in rotation direction, the tracks are symmetrically provided with shaft sleeves, the inner peripheries of the shaft sleeves are respectively provided with protrusions, the protrusions slide in the tracks, the shaft sleeves are respectively provided with extending frames, and the extending frames are respectively provided with wheels. A lengthened wheel support is arranged between the pedal and the wheel, the pedal and the wheel support can be folded, the pedal and a handlebar frame are closed up after folding, the wheel frame is folded on the bottom face of the pedal and closed up with the bottom face, the whole vehicle is in a closed crust shape, and two rear wheels are respectively arranged on two sides of each front wheel to form a stable plane, so that the vehicle can be erected on the ground, can be parked on a corner in a leaning mode and is convenient to store and small in occupied space. When the vehicle is required to be moved remotely, the vehicle can be dragged to advance only by pulling the top end of the frame, the time and labor are saved, and operation is convenient.

A driven device of crankweb feeding sewing machine, wherein main shaft is supported by axises on level arm extending along the skew direction; transmission shaft is supported by axises on bracket fixing the level arm on the working table, and has manual turn knob on ends; driven motor is located near the working table; cyclic belt combines with the fixed pulley on the transmission shaft to transfer rotation of motor shaft to main shaft, the pulley comprises flange main part, support guide apparatus, and second inclined tablet, wherein, the flange main part comprises first groove and first inclined tablet connecting to the groove and and forming axes. The support guide apparatus and the flange main part are formed together. The second inclined tablet is located opposited to the first inclined tablet, and movably fixed on the support guide apparatus. First groove and second groove which forms by the two inclined tablets combines with different cyclic belts, wherein, one of the cyclic belts is located on the main shaft, and the other cyclic belt is located on the motor shaft.

The invention belongs to the technical field of automatic transmissions and particularly relates to an eight-gear automobile automatic transmission. The transmission solves the technical problems that in the prior art, adjacent planetary gears interfere with one other, an obtained transmission ratio depends on a presumed transmission ratio, and the limitation of the transmission ratio of a system is large. The transmission comprises a box, a power input shaft, three clutches, four brakes and a planetary gear system. The planetary gear system comprises a first sun gear, a second sun gear, a third sun gear, a first gear ring, a second gear ring, a first planetary gear with a step, a first planetary gear without a step and a planetary frame. The second sun gear, the third sun gear and the planetary frame are controlled by the first clutch, the second clutch and the third clutch respectively. The second sun gear, the first sun gear, the planetary frame and the second gear ring are controlled by the first brake, the second brake, the third brake and the fourth brake respectively. The transmission is easy to control, transmission efficiency of all gears is high, and the adjacent planetary gears do not interfere with one other.

A layout for parking system of decelerator for an electric motor vehicle is provided herein. More specifically, the layout includes a decelerator housing, an input gear disposed within the decelerator housing, an output gear disposed within the decelerator housing, an intermediating gear connecting the input gear and the output gear and a parking unit disposed above the input gear and selectively trammeling the intermediating gear. Further, in the present layout the parking unit is disposed above an oil line in the decelerator housing.

A hybrid driving unit (7) in which a second electric motor (23) is disposed on the side closer to the front (the side closer to an internal combustion engine (5)) than a first electric motor (20). A casing member (14) is formed such that an inner diameter of a part thereof in which a stator (28) of the second electric motor (23) is fixed is larger than that of a part in which a stator of the first electric motor (20) is fixed. It allows the second electric motor (23) to be constructed so as to have a large radial dimension and to that extent, allows the length thereof in the longitudinal direction to be suppressed. Accordingly, it allows the length of the whole hybrid driving unit (7) to be shortened.

The invention relates to a cutting machine, and discloses a cutting machine with double oblique draw bars. The cutting machine comprises a base, a worktable, a rotary mechanism and a saw blade. A semicircular movable protective cover is arranged on the outside of the saw blade, an inner pressure plate and an outer pressure plate are arranged on two sides of the saw blade, the saw blade is sandwiched between the inner pressure plate and the outer pressure plate and is connected with a plastic gear box by a belt pulley transmission gear, the belt pulley transmission gear comprises a four-groove belt, and the inner pressure plate is clamped and embedded on the outer pressure plate. The cutting machine has the advantages that the saw blade can be positioned and clamped by a clamping and embedding type positioning and clamping device, accordingly, minor-axis sections can be shortened to the greatest extent, and a protective device can be narrowed to the greatest extent; the semicircular movable protective cover which is coaxially arranged is hinged onto a fixed protective cover, can move along with a cutting device and has a movable protective function; a front tank and a rear tank can be closed, and the rear tank is integrally connected with a motor shell, so that the gear box can be formed; the gear box and the motor shell are made of plastics, and accordingly the cutting machine is low in material consumption and cost and is light.

Provided are a turbo compressor and a centrifugal chiller comprising the same with which the length of a shaft in an axial direction can be shortened, rotational shake accompanying rotation of the shaft is suppressed, and a device can be made small. A turbo compressor comprising: a compressor part which compresses refrigerant; a shaft (15) which drives the compressor part around an axis of rotation X; a magnetic bearing (30A) which has provided thereto an iron core part (32) comprising a plurality of teeth parts (34) formed at equiangular intervals around the axis of rotation X, and, a plurality of coils (36) respectively wound around the plurality of teeth parts (34), and said magnetic bearing (30A) allows the shaft (15) to pass through and supports said shaft (15) without contacting the same; an auxiliary bearing which allows the shaft (15) to pass through; and a displacement sensor (50) which detects displacement of the shaft (15), wherein the displacement sensor (50) is provided between neighboring coils (36).

A connection portion (14d) at a front end portion of a case member (14) is connected to an internal combustion engine, and the case member is mounted on a portion (4a) of a vehicle body using a mount portion (installation portion) (14c) at a rear end portion of the case member (14). Further, a second electric motor (23), a heavy object, is disposed at the rearmost end portion of a line where a first electric motor (20), a planetary gear (21) for power distribution, a second electric motor (23), and a speed changer (22) are arranged on one shaft (13) of the case member (14). This suppresses vibration occurring in the case member (14).

A fluid transportation machine has a rotating shaft (11), a double suction-type pump (16), and magnetic levitation motors (12, 13) having functions as radial magnetic bearings for supporting the rotating shaft (11) without contact and as motors for rotatingly driving the rotating shaft (11). The double suction-type pump (16) has a double suction-type blade wheel (21) attached to the rotating shaft (11), a pump casing (31) provided so as to surround the blade wheel (21), and a pressure balance mechanism for axially positioning the rotating shaft (11). The pump (16) is positioned at substantially the center of the rotating shaft (11), and the two magnetic levitation motors (12, 13) are arranged on both sides of the pump (16).