47results about How to "Small shift force" patented technology

The invention discloses a novel parking braking mechanism of a dual clutch automatic transmission (DCT). The novel parking braking mechanism is characterized in that a gear-shafting arm, a push arm, a sector plate and a gear-position sensor are arranged on a gear-shifting shaft, one end of a pull rod is arranged on the push arm, the other end of the pull rod is overlapped inside a fixator hole, a parking gear is arranged on an intermediate shaft of the transmission, and a parking pawl rotates around a parking shaft; and a plate spring is composed of a spring piece, a pin shaft and a casing pipe, and the casing pipe rolls in a groove of the sector plate on a pin shaft in a sleeved manner. The novel parking braking mechanism disclosed by the invention has the advantages of simple and compact structure, light weight, low cost, strong parking bearing capacity, accuracy in gear-shifting positioning, low gear-shifting force, and good hand feel, can be used for realizing five PRNDS (Parking, Reverse, Null, Drive, Sports) gear positions including a parking gear, a reverse gear, a null gear, a drive gear and a sport gear, and can be used for guaranteeing the reliable parking at the P gear.

The invention discloses a synchronous reversing belt crawling-gear gearbox of a tractor. The synchronous reversing belt crawling-gear gearbox comprises a synchronizer reversing device, a main speed variator, an auxiliary speed variator and a crawling gear device which are sequentially arranged. One end of the synchronizer reversing device is connected with an engine, and one end of the crawling gear device is connected with a bevel pinion. The synchronizer reversing device and the main speed variator are double-friction-cone synchronizers. By combining the synchronizer reversing device, the main speed variator, the auxiliary speed variator and the crawling gear device, 32 forward gears and 32 reverse gears can be realized, the more the reverse gears are, the better the operation needs can be met. The synchronizer reversing device is disposed at the front end of the main speed variator, gear reversing and engaging of the double-friction-cone synchronizers are realized, parking for gear engagement is omitted when at low speed, gear shift impact and force are low, gear shift time is short, and operation efficiency is high.

The invention discloses a synchronous structure for a twin countershaft transmission. The synchronous structure comprises a main shaft, a synchronizer and two tap-position gears, wherein the synchronizer is arranged on the main shaft; each of two tap-position gears is provided with one boss extending into the inner circle of a corresponding synchronizer taper ring; at a neutral position, the inner circle surfaces of the synchronizer taper rings contact the bosses; and when a synchronous taper surfaces on the synchronizer taper rings contact the synchronous taper surfaces on the tap-position gears, the inner circle surfaces of the synchronizer taper rings do not contact the bosses on the tap-position gears. According to the synchronous structure for a twin countershaft transmission, the eccentricity of the synchronizer taper rings and the tap-position gears is controlled; at the neutral position, the synchronous taper surfaces of the synchronizer taper rings do not contact the synchronous taper surfaces of the tap-position gears; therefore, taper surfaces cannot be worn at the neutral position; and the service life is long. Because of the special connection structure of a sliding disk and the main shaft, self energizing effort can be generated, the shifting force is lowered, and the synchronous structure can conveniently shift.

The invention relates to an automatic transmission mechanical parking mechanism. The automatic transmission mechanical parking mechanism comprises a parking ratchet wheel circumferentially fixed to atransmission shaft system. A gear shifting rotary shaft is arranged on a transmission box. One end of the gear shifting rotary shaft is fixedly connected with a gear shifting rotary arm, and the otherend of the gear shifting rotary shaft is fixedly connected with a parking rotary arm. The parking rotary arm is in an L shape. The short arm end of the L-shaped parking rotary arm is provided with sectored teeth. An elastic compression lock pin is arranged on the transmission box. The long arm end of the L-shaped parking rotary arm is hinged to a parking push-pull rod. The extension end of the parking push-pull rod is inserted into a parking driving frame which is in sliding fit with the transmission box. The extension end, inserted into the parking driving frame, of the parking push-pull rodis sleeved with a push rod compression spring. One end of the push rod compression spring is limited by a convex edge of the extension end of the parking push-pull rod, and the other end of the pushrod compression spring is limited by an end plate of the parking driving frame. A first roller makes rolling contact with the lower end face of a guide plate, and a second roller makes rolling contactwith the free end of a parking detent. The transmission box is provided with a reset device corresponding to the free end of the parking detent.

The invention belongs to the technical field of transmissions, and specifically relates to a four-wheel drive transmission for agricultural equipment, which consists of an active case and a transfer case. The cut-off input power of the rear axle provided by the transfer case realizes the output of the four-wheel drive. The conversion between the two-wheel drive and the four-wheel drive is easy to operate and can be switched at any time. The column gear structure with low processing difficulty is adopted, which reduces the processing cost and improves the Transmission efficiency, gear design conforms to ergonomics, it is convenient for the operator to shift gears, effectively avoids the phenomenon of disengagement and disordered gears, and provides enough power for agricultural equipment used in complex terrain conditions; it has fewer gears and the gear shifting operation is simple , small shifting force, reasonable gear arrangement and gear speed, good safety performance, high reliability, long service life, four drive power outputs provide enough power for agricultural equipment driving on complex roads.

The invention relates to a gear selecting and shifting control mechanism of a gear selecting and shifting device in an automobile gearbox. The gear selecting and shifting control mechanism comprises a control shaft, a first bearing supporting seat, a second bearing supporting seat, a gear shifter casing, a gear shafting guide block, an M-shaped gear shafting groove, a gear shifting groove in the shape of a Chinese character 'wang', a V-shaped gear shifting return block, a first gear shifting finger and a second gear shifting finger, wherein the gear shifter casing, the first bearing supporting seat, the first gear shifting finger, the M-shaped gear shifting groove, the gear shifting groove in the shape like a Chinese character 'wang', the V-shaped gear shifting return block, the second gear shifting finger and the second bearing supporting seat are integrally welded; a control shaft is mounted in the second bearing supporting seat and the first bearing supporting seat; the gear shifting guide block is welded to the control shaft, and is matched with a guiding waist-shaped hole. The gear selecting and shifting control mechanism disclosed by the invention is small in gear shifting force, simple in structure, convenient to mount and replace and simple in forming process, and has favorable selecting and shifting hand feel.

The invention relates to a transmission shifting mechanism for all-electric cars. According to the technical scheme, the transmission shifting mechanism mainly comprises a shifting motor, linear bearings, a shift fork shaft, a triple-cone synchronizer, a self-locking pin, a shift fork, a shift block, a shift shaft, a buffer, an angle sensor and the like. The buffer is connected with the shifting motor. The shift shaft is mounted on the buffer in a connected manner through splines. Two ends of the shift shaft are provided with the angle sensor and the shift block respectively. An oil seal is disposed between the angle sensor and the shift block. The shift block is inserted into a shift fork hole. The shift fork is connected with the shift fork shaft through the pin. The shift fork shaft is connected to front and rear shells through the linear bearings. The shift fork is inserted into a gear ring of the triple-cone synchronizer. The transmission shifting mechanism has the advantages that shifting force is small, shifting is stable, shifting time is short, and accordingly ECT shifting is higher in quality and reliability.

The invention relates to a power reversing tractor transmission system of a main clutch between a main speed variator and an auxiliary speed variator. The power reversing tractor transmission system comprises a main speed variator, a creeper gear device, an auxiliary speed variator, a transfer case, an oil pump drive device, a power output device, a normally-engaged driving gear, a normally-engaged driven gear, a power output shaft rear shaft, a power output front shaft, an oil pump drive driving gear, a torsion shock absorber and a front output shaft; the main speed variator is connected with the creeper gear device by virtue of the engagement of the normally-engaged driving gear and the normally-engaged drive gear, the creeper gear device is connected with the auxiliary speed variator, an output shaft in the auxiliary speed variator is connected with a primary driving gear of the transfer case, the primary driving gear of the transfer case is engaged with a primary driven gear of the transfer case, and the oil pump drive device is connected with the power output device by virtue of the engagement of the oil pump drive driving gear and the oil pump drive driven gear; a shaft in the main speed variator is connected with the torsion shock absorber, an auxiliary speed change output shaft in the auxiliary speed variator is connected with a rear axle of a tractor, and the transfer case is connected with a front axle of the tractor through the front output shaft.

The invention discloses a gear shifting mechanism and method of a transmission and a vehicle. The gear shifting mechanism and method are particularly suitable for transmissions of new energy vehicles.The gear shifting mechanism adopts a gear shifting drum type structure. Shifting forks are connected with gear shifting drums through connection pieces. Lubricating oil channels are additionally arranged on the shifting forks, so that lubrication of needle bearings is achieved, the gear shifting force can be effectively reduced, and gear shifting smoothness is improved. Meanwhile, the torque of the motor drives the gear shifting drums through a worm and gear mechanism, the executing motor and the gear shifting drums are perpendicularly arranged, so that the occupied space is small, and the structure is compact. Besides, when the motor drives the gear shifting drums to rotate, since the path of a rotating guide groove on the outer surface of each gear shifting drum is designed in advance,the shifting forks can move according to the pre-designed path, and then sequential gear shifting is achieved.

The invention belongs to the field of gearboxes, and relates to a gearbox for agricultural vehicles, especially a gearbox for agricultural vehicles with a wet clutch, which is used in the preparation of agricultural vehicles and solves the problem that friction plates are easily damaged due to improper operation by users. It adopts a wet clutch, which makes the service life of the friction plate longer and the transmission torque stronger, avoiding damage to the clutch due to improper operation, thereby improving the service life of the clutch; the housing is equipped with an intermediate shaft assembly, an output shaft assembly, and a differential assembly, first shaft assembly and reverse gear idler shaft assembly, there is a wet clutch assembly outside the housing, the wet clutch assembly is connected with the first shaft assembly through a pulley, and the other assemblies are connected by gears; the overall structure is reasonable , low processing difficulty, low preparation cost, high transmission efficiency, energy saving and environmental protection, few gears, small shifting resistance, easy and convenient operation, good economic benefits and broad market prospects.

The invention provides a gear shifting device and an automobile, and relates to the technical field of automobiles. The problem that the gear shifting comfort of the automobile is low is solved. The gear shifting device comprises a gear shifting shell body, a gear shifting rod, a gear fixing rod and a gear shifting positioning assembly, wherein the gear shifting shell body is provided with a containing cavity; the gear shifting rod is arranged in the gear shifting shell body, and one end of the gear shifting rod stretches out of the gear shifting shell body; the gear fixing rod and the gear shifting positioning assembly are arranged in the containing cavity; the gear fixing rod is fixedly connected with the gear shifting rod; the gear shifting positioning assembly comprises a plurality of gear shifting positioning blocks arranged in the gear shifting direction; a gear shifting positioning groove is formed between every two adjacent gear shifting positioning blocks; an adjusting piece of which one end stretches out of the gear shifting shell body is arranged in the area, corresponding to each gear shifting positioning block, in the gear shifting shell body; an elastic piece is arranged between each gear shifting positioning block and the corresponding adjusting piece; the two ends of the elastic pieces make contact with the gear shifting positioning blocks and the adjusting pieces correspondingly; and the positions of the adjusting pieces are adjusted, so that the compression amount of the elastic pieces is changed, and the gear shifting force is changed. The gear shifting device is used for improving the gear shifting comfort of the automobile.

The invention discloses a synchronizer ring mechanism. The synchronizer ring mechanism comprises a combined gear, a synchronizer locking ring, a conical ring and a plurality of friction plates, a shaft hole of the synchronizer locking ring is a conical hole, a conical boss is arranged on the combined gear, the conical ring is located on the conical boss and located between the outer conical surface of the conical boss of the combined gear and the inner conical surface of the synchronizer locking ring, and the friction plates are fixedly connected to the inner conical surface of the conical ring; the included angle beta 2 between the outer conical surface of the conical ring and the central axis is larger than the included angle beta 1 between the inner conical surface of the synchronizer locking ring and the central axis, the large end of the inner conical surface of the synchronizer locking ring makes contact with the large end of the outer conical surface of the conical ring, the included angle between the inner conical surface of the conical ring and the central axis is larger than the included angle alpha between the outer conical surface of the combined gear and the central axis, and the small end of the inner conical surface of the conical ring makes contact with the small end of the outer conical surface of the combined gear; and a plurality of open grooves are formed in the large-diameter end of the conical ring, a plurality of limiting bosses extending along a gen are arranged at the small end of the conical ring, a plurality of limiting blocks extending in the radial direction are arranged at the small end of the synchronizer locking ring, and a limiting groove is formed between every two adjacent limiting blocks and used for allowing the corresponding limiting boss to be inserted therein.

The invention relates to a gear shifting servo system. The system comprises a gear shifting input shaft, a transmission mechanism, a deflection mechanism, a servo valve structure, a gear shifting executing mechanism and a positioning mechanism, wherein the gear shifting input shaft drives a driven element to rotate synchronously; when the driven element rotates, a deflection element connected withthe driven element through a pin roll can be synchronously driven; and an output shaft is in a fixed state at a gear box end at the beginning of starting, the deflection element swings leftwards or rightwards by taking the output shaft as a rotating center, a deflection executing element transversely moves under the deflection of the deflection element, and an air valve in a servo valve structureis opened, so that the assisting effect is achieved. Through the conversion of the deflection mechanism, linear motion is transferred to an inhaul cable or a rod through the transmission mechanism bya shift rod of a shifter, then rotary motion generated by the linear motion on the gear shifting input shaft can be converted into the linear motion of the gear shifting output shaft which is almostin the same longitudinal position as the transmission mechanism. With the system, gear shifting force can be remarkably reduced, the gear shifting comfort is improved, the occupied space is small, theinstallation is convenient, and the cost is reduced.

The invention relates to the technical field of automobile transmission systems, and discloses a joint device with a torsional vibration damping function, the joint device comprises a first shell and a second shell, the first shell and the second shell are both sleeved on a rotating shaft, the first shell and the second shell are oppositely arranged and fixedly connected, the outer side end face of the first shell can be connected with a gear, and the outer side end face of the second shell can be connected with a gear; an accommodating cavity is formed between the first shell and the second shell; the vibration reduction mechanism is arranged in the containing cavity, and the vibration reduction mechanism comprises a vibration reduction piece arranged around the peripheral face of the rotating shaft; and the rotating disc is fixedly connected to the rotating shaft in the circumferential direction and located in the containing cavity, and at least one end face of the rotating disc abuts against the vibration reduction piece. Vibration caused by torque impact is counteracted by the vibration reduction piece, the joint device can be jointed under the working condition of large rotating speed difference, the driving motor active speed regulation time of an electric vehicle or a hybrid electric vehicle in the gear shifting stage is shortened, and therefore the gear shifting time is shortened, and the requirement for rotating speed control of the driving motor is lowered.

The invention belongs to the field of gearboxes, and relates to a gearbox for agricultural vehicles with bridge bearings, which is used in the preparation of agricultural vehicles, and solves the problem that the eccentricity of the whole vehicle occurs in the gearbox with a single pulley, which causes excessive vibration of the pulley transmission, and the belt and the gearbox are easily damaged. The problem of damage, the use of bridge bearings can effectively reduce the vibration of the gearbox and improve the service life of the transmission belt and gearbox. The main structure includes the gearbox housing and the first shaft assembly and the second shaft assembly installed in the gearbox housing. , intermediate shaft assembly, output shaft assembly, differential assembly, clutch, pulley and bridge bearing, the front end of one shaft assembly is equipped with a clutch, the clutch is connected with the pulley through the bridge bearing, and the whole is a four-axis transmission. It can realize the reverse design of the whole machine; its overall structure is simple, the gears are arranged reasonably, the production cost is low, the gears are few, the shifting resistance is small, the processing difficulty is small, the transmission efficiency is high, the operation is easy and convenient, energy saving and environmental protection, and has good performance Economic benefits and broad market value.