75results about How to "Reliable shifting" patented technology

A gear transmission assembly for an electrical power tool includes a housing (6), a multi-stage gear train (1) located in the housing and having a plurality of axially displaceable indexing gears (4a, 4b) associated with respective stages of the gear train (1) and a shift device (2) for shifting the gear train (1) from one stage to another and having a shifting slide (3) displaceable from one shift stage to another, and a plurality of springable shifting stirrups (5a, 5b) connected with the shifting slide (3) and cooperating with respective indexing gears (4a, 4b) for displacing same in response to displacement of the shifting slide (3) between shift stages.

A running control system having a radar device that detects a distance between a subject vehicle and a preceding vehicle. When a vehicle speed sensor detects the subject vehicle has stopped, a transmission output controller sets a transmission output of the radar device to a stopping time transmission output lower than a running time transmission output. When the radar device detects an increase in the distance between the subject vehicle and the preceding vehicle while the subject vehicle is stopped, or when the distance between the subject vehicle and the preceding vehicle detected by the radar device while the subject vehicle has stopped is longer than a predetermined value, a notifying device notifies an occupant of the subject vehicle that following running control is possible.

The invention relates to a centrifugal gear shifting device, which comprises a first transmission element, a second transmission element and a gear shifting mechanism, wherein an accommodating cavity is formed between the second transmission element and the first transmission element; the second transmission element is provided with an inner wall positioned in the accommodating cavity; the first transmission element is provided with an outer wall positioned in the accommodating cavity; a first ratchet wheel is arranged in the outer wall position of the first transmission element; a second ratchet wheel is arranged in the inner wall position of the second transmission element; the gear shifting mechanism comprises a gear shifting element frame and a gear shifting element device; the gear shifting element device comprises a plurality of gear shifting elements; the gear shifting elements are connected through balancing elements; each gear shifting element comprises an installing part and a weight balancing block; the installing part comprises an inner surface and an outer surface; the first pallet is arranged on the inner surface of the installing part; the second pallet is arranged on the outer surface of the installing part; an elastic element used for controlling the initial position of the first pallet and the second pallet is arranged on the gear shifting element frame. The centrifugal gear shifting device can realize the automatic gear shifting in the running process.

The invention discloses a center wheel fixed single-wheeled direct drive multi-speed full-automatic transmission which comprises a center shaft, a wheel hub and a speed change mechanism, wherein the speed change mechanism comprises at least two sets of planetary transmissions and at least one set of automatic centrifugal gear-shifting mechanism; each set of planetary transmissions comprises a planet carrier, a planet wheel, a gear ring and a center wheel; in every two adjacent sets of planetary transmissions, the gear ring of one set of planetary transmissions and the planet carrier of the other set of planetary transmissions form an assembling unit; the planet carrier of an initial set of planetary transmissions and the center shaft are fixedly connected or integrally molded with each other; each set of automatic centrifugal gear-shifting mechanism comprises a pawl piece rack, a ratchet wheel and at least one pawl piece; the pawl piece rack is arranged in the wheel hub; the ratchet wheel is arranged on the assembling unit or the gear ring; and an overrun clutch is arranged between the planet carrier and the wheel hub, or the overrun clutch is arranged between the assembling unit and the wheel hub. According to the transmission disclosed by the invention, the requirement on stepping frequency can be reduced at a medium/high gear.

The invention relates to a jaw clutch transmitter for a transmission, which includes a transmitter body, at least one torque transmission element which is connected to the transmitter body in a torsion-proof manner and is displaceable in the axial direction of a transmission shaft, and at least one clutch formation which is connected to the transmitter body in a torsion-proof manner and can be brought into engagement with a complementary driven wheel clutch formation of a gear wheel,and at least one slotted friction ring is provided which can be brought into engagement with the friction surface associated with the driven wheel. The invention also relates to a gearbox with at least one transmission shaft, at least one jaw clutch transmitterwhich is arranged displaceably on the transmission shaft, and at least one driven wheel provided with a driven wheel clutch formation which is engageable to the clutch formation on the transmitte, whereby the driven wheel is coupled with the transmission shaft in a torsion-proof manner, and the driven wheel is provided with a friction surface which can cooperate with the friction ring of the transmitter.

The invention discloses a drive device of an electric motor car. The drive device comprises a shell, a motor, a speed change mechanism and a gear-shifting self-holding electromagnet, wherein the speed change mechanism comprises an output shaft sleeve, a high-speed driven gear and a low-speed driven gear are sleeved on the output shaft sleeve, and mutually matched ratchet mechanisms are arranged between the output shaft and the high-speed driven gear and between the output shaft sleeve and the low-speed driven gear. The drive device also comprises a wheel axle, wherein the output shaft sleeve is sleeved on the wheel axle through a bearing, a gear-shifting shaft sleeve capable of moving along the axial direction is sleeved on the wheel axle, the gear-shifting shaft sleeve is matched with the ratchet wheel mechanism by moving the gear shifting shaft sleeve, thus switching between high speed and low speed can be realized. The drive device provided by the invention has the advantages of high gear shifting speed, accuracy and reliability, convenience for maintenance, capability of automatically carrying out power upgrading, low cost, and capability of increasing bearing capacity of the electric motor car.

The invention discloses a transmission, a power drive system and a vehicle. The transmission comprises a first planetary gear mechanism, a second planetary gear mechanism, an input shaft, an intermediate shaft, a first synchronizer and a second synchronizer. A second planetary carrier of the second planetary gear mechanism is connected with the output end of the transmission. The input shaft is connected with a first sun gear. A first toothed ring is connected with the intermediate shaft. The intermediate shaft is connected with the second sun gear. The first synchronizer enables the first planetary carrier to be fixed to a shell of the transmission or to be connected with the first sun gear. The second synchronizer enables a second toothed ring to be fixed to the shell of the transmissionor to be connected with the first toothed ring. According to the transmission, by arranging the double-planetary-line double-synchronizer structure, rapid, smooth and reliable gear shifting can be achieved; and the transmission is simple in structure and convenient to maintain.

The invention discloses a transmission, a power driving system and a vehicle. The transmission comprises a first planetary gear mechanism, a second planetary gear mechanism, an input shaft, a middle shaft, a first synchronizer and a second synchronizer. The first planetary gear mechanism comprises a first sun gear, a first planet gear, a first planet carrier and a first gear ring; the second planetary gear mechanism comprises a second sun gear, a second planet gear, a second planet carrier and a second gear ring; the second gear ring is connected with the output end of the transmission, the first synchronizer makes the first gear ring fixed with a shell of the transmission or the first gear ring connected with the first sun gear, and the second synchronizer makes the second planet carrierfixed with the shell of the transmission or the second planet carrier connected with second sun gear. According to the transmission, through the arrangement of a double-planet-row double-synchronizerstructure, gear shifting can be achieved quickly, smoothly and reliably, and the transmission is simple in structure and convenient to maintain.

The invention discloses a transmission, a power driving system and a vehicle. The transmission comprises three planetary gear mechanisms, an input shaft, a first middle shaft, a second middle shaft, afirst synchronizer and a second synchronizer. A first gear ring of the first planetary gear mechanism is fixedly connected with a shell of the transmission, a second planet carrier of the second planetary gear mechanism is connected with the output end of the transmission, a third gear ring of the third planetary gear mechanism is fixedly connected with a shell of the transmission, a third planetcarrier of the third planetary gear mechanism is connected with a second gear ring, the first synchronizer enables the first middle shaft and a first planet carrier to be connected or enables the first middle shaft and a first sun gear to be connected, and the second synchronizer enables the first middle shaft and a second sun gear to be connected or enables the first middle shaft and the secondplanet carrier to be connected. According to the transmission, through the structure of three planetary lines and dual synchronizers, rapid, smooth and reliable gear shifting can be achieved, and thetransmission is simple in structure and convenient to maintain.

A power-on 2-3 upshift control method for an automatic transmission comprises: determining whether a power-on 2-3 upshift condition exists; extracting an initial hydraulic pressure control duty and hydraulic pressure control duty depending on an input torque from a map table for an on-coming friction element and an off-going friction element, if it is determined that the power-on 2-3 upshift condition exists, and performing a shift control for the upshift; and completely releasing a hydraulic pressure of the off-going friction element at a point at which a hydraulic pressure for the on-coming friction element is capable of tolerating a turbine torque.

The bicycle speed variator includes front chain wheel installed via a bearing on pedal rocking arm, back flywheel on the back wheel and with two back chain wheels, double chain, front flywheel coaxial with the front chain wheel, push block fixed onto the front chain wheel, swinging stopper hinged to inside of the pedal rocking arm, and spring compressed between the pedal rocking arm and the swinging stopper. The swinging stopper under the control of the spring has two stable work positions; the push block has one bevel and moving track crossing with that of the swinging stopper in one of its stable work positions. When the middle shaft rotates reverse, the swinging stopper under the action of centrifugal force or push block pressure can convert between two stable work positions. The present invention also discloses the variable speed bicycle with the speed variator.

A continuously variable transmission device includes an input shaft, an output shaft, an input roller, an output ring, a transmission ring, a plurality of planetary rollers including a first conical portion externally contacted to the input roller and internally contacted to the output ring and a second conical portion internally contacted to the transmission ring, a movable holder which holds the plurality of planetary rollers to be capable of rotating about each rotating axis line and revolving about the center axis line, and a loading cam mechanism (CM1, CM2) which generates a thrust load. The input roller, the output ring, and the transmission ring are formed so that each face being contacted to the planetary roller is formed to have a convex curved face. The planetary rollers are supported by the movable holder so that an inclination angle of a rotation axis line against the center axis line is variable.

In a broadband communication system there are multi-stage power amplifier systems for amplifying the power of radio-frequency (RF) communication signals. Each stage of the amplifier system results in composite triple beat (CTB) distortion, and if the phase of the CTB distortions are approximately the same (i.e. are in-phase), then the amplitudes of the distortions are added (i.e. “20 dB” rule). The amplifier system of the invention includes one or more phase filters positioned in series between the power amplifier stages. The phase filters are adapted to shift the phase of the communication signals, so that the phase of CTB distortions, resulting from the amplification of the communication signals in the amplifier stages between the phase filters, are substantially different (i.e. are out-of-phase). Thus, only the power of the CTB distortions are added (i.e. “10 dB” rule).

The present invention provides a drive assembly (80) for a vehicle (1) which can be driven with engine power and in particular additionally with muscle power, an electric bicycle, eBike or pedelec, the drive assembly has an electric drive (3) for generating an engine torque, a crankshaft (15) rotatable around an axis of rotation (Y) for receiving at least the engine torque, a transmission device (20) designed to transmit a torque from the crankshaft (15) to a driven element (4) that can be coupled to a drive wheel (9-2) of the vehicle (1), the transmission device being designed to create a shiftable variable transmission ratio, and an adjusting device (60) which is coupled to the transmission device (20) and via the actuation of which the transmission ratio of the transmission device (20)can be adjusted, wherein the electric drive (3) is designed to actuate the adjusting device (60) and can be coupled to the adjusting device (60), in particular to transmit at least some of the enginetorque.

The invention relates to the technical field of power devices of engineering machinery, in particular to a power gear shift gearbox for a wheel excavator. The power gear shift gearbox comprises a boxbody, and the interior of the box body is connected with an input shaft and an output shaft; a first needle bearing, a clutch and an input gear are fixed to the input shaft, a first spline sleeve is connected to the first needle bearing, one end of the first spline sleeve is provided with a first-position gear connected with the clutch, a second-position gear connected with the clutch is arrangedbetween the clutch and the input gear, and a second needle bearing is connected between the second-position gear and the input shaft; and a third needle bearing, a fourth needle bearing and an outputgear engaged with the input gear are fixed to the output shaft, the third needle bearing is provided with a first transmission gear engaged with the first-position gear, and the fourth needle bearingis provided with a second transmission gear engaged with the second-position gear. The power gear shift gearbox has the advantages that engagement of the two pairs of gears is controlled through the clutch, gear shifting is achieved, and output of different speed ratios is achieved; and the interior structure is compact, and the space of the whole gearbox is greatly utilized.