TRANSMISSION
Manual transmission is one of the most common transmission, referred
to as MT. Its basic structure in a single sentence is a central axis, two
input shaft, namely, the axial and axial oart, they constituted the transmission of the subject, and, of course, a reverse axis. Manual transmission gear transmission and manual, contain can in axial sliding gears, through different meshing gears to change gear of torsional purpose.
The typical structure and principle of the manual transmission.
Input shaft also says, it's in front of the spline shaft directly with
clutch platen, thus the spline set by the engine relay of torque. The first
shaft gear meshing gears, often with oart as input shaft, and the gear on oart will turn. Also called shaft, because even more solid shaft of gear. The output shaft, and the second shaft position have the drive shaft
gear, may at any time and under the influence of the control devices and the corresponding oart gear, thus changing the speed and torque itself. The output shaft is associated with tail spline shaft torque transmission
shaft, through to drive to gear reducer.
Predictably, transmission gear drive forward path is: input shaft
gear - oart gnaws gnaws gear - because the second shaft gear - corresponding corresponding gear. Pour on the axle gear can also control
device, by moving axis in the strike, and the output shaft gear and oart gear, in the opposite direction.
Most cars have five forward and reverse gear, each one has certain ratio,
the majority of gear transmission more than 1, 4 gears transmission is 1, called directly, and ratio is less than 1 of article 5 gear shift accelerated called. The output axis gear in the mesh position, can accept
power transmission.
Due to the gearbox output shaft to input shaft and the speed of their
gear rotating, transform an "synchronization problem". Two rotating speed
different meshing gears forcibly inevitable impact and collision damage gear. Therefore, the old transmission shift to use "two feet clutch" method, ShengDang in neutral position shift to stay for a while, in the space location on the door, in order to reduce gear speed. But this operation is more complex, difficult to grasp accurately. Therefore
designers to create "synchronizer", through the synchronizer will make
the meshing gears reach speed and smooth.
Currently the synchronous transmission adopts is inertial synchronizer, it mainly consists of joints, synchronizer lock ring etc,
it is characteristic of the friction effect on achieving synchronization.
Mating, synchronizer and mating locking ring gear tooth circle have chamfering (locking horns), the synchronizer lock ring inside surface of
gear engagement ring and the friction surface contact. The lock horns with cone when designing the proper choice, has been made to the surface friction of meshing gears with gear synchronous, also can rapid produces
a locking function, prevent the synchronous before meshing gears. When synchronous lock ring of gear engagement with surface contact surface, the outer circle in friction torque under the action of gear speed rapid
decrease (increase) or to synchronous speed equal, both locking ring spun
concurrent, relative to lock ring gear synchronous speed is zero, thus inertia moment also disappear, then in force, driven by the junction of unimpeded with synchronous lock ring gear engagement, and further to engagement with the engagement ring gear tooth and complete shift process.
functional (1) change ratio, meet different driving conditions for traction
engine, the need to work in the favorable conditions and meet the speed may request. In a wide range of vehicle speed changing the size and automobile driving wheel on the size of the torque. Due to the different
demands, automobile driving conditions of vehicle speed and torque can drive in a broad range of change. For example, in high speed can be reached
on 100km/h, while in the urban district, speed in 50km/h. In the empty flat roads, road, very little resistance
When When carrying carrying carrying uphill, uphill, uphill, driving driving driving resistance resistance resistance was was was great. great. great. And And And the the
characteristics of automobile engine speed range is lesser, and torque changes more cannot meet the actual conditions range. (2) drive backward, to satisfy the need to drive car backwards. Realizing the backing, engine crankshaft are generally only to a direction,
and sometimes need to back, so, often used in the transmission of reverse
to realize the car drive backward.
(3) in power, interruption, idle running engine starting, auto shift or need to stop the dynamic output, interrupted to transfer the power of
the drive wheels.
(4), when the clutch engagement realize gap, gearbox can not power output. For example, can ensure drivers in engine flameout loosen the clutch when leaving drivers seat.
constitute
By continuously variable transmission gearbox and speed control two
parts. The main function of the variable transmission torque and speed is the change of numerical and direction, The main function of the
operation is controlled transmission mechanism, realize the
transformation of transmission ratio, shift to speed torque. Principle,
Mechanical transmission main application of the principle of gear
transmission velocity. Say simply, there are a number of different
transmission gearbox group of gear pair of vehicle, and behavior, is also
shifting gears trunk by manipulating institutions make different gear
pair work. As in low-speed, ratio of gear pair work, and in high-speed, let ratio of small gear pair work.
Classification,
1, according to the change of transmission, transmission way, there can be divided into grade level and synthetical three.
(a) : several levels of transmission ratio, can choose the fixed by gear. And can be divided into: gear axis of ordinary gear transmission and fixed gear planetary gear (part) of planetary gear transmission axis
of rotation.
b) stepless type transmission: ratio can be continuous variation within a certain range, commonly, mechanical and electric hydraulic type
etc.
(c) comprehensive type transmission by a class type, transmission and
stepless type transmission, the ratio of the maximum and minimum values can be in between the scope for several section stepless change.
2, press control can be divided into compulsory manipulation, transmission, automatic control and semi-automatic control 3 kinds.
(a) mandatory manipulation of transmission by direct manipulation, change gear shift lever drivers.
(b) automatic control type transmission ratio of choice and change: the shift is automatic. Drivers simply manipulate accelerated pedal, transmission can according to the engine speed and load control signal signal actuator, realize the transformation of gear.
(c) semi-automatic control type transmission can be divided into two
kinds: one kind is part of gear, automatic shift gears, manual (mandatory)
shift, Another kind is selected by button in mining under gear clutch pedal
or accelerated release pedal, the executing agency to shift. Transmission of maintenance
1 transmission gears maintenance
Transmission gears are always changing speed, load, gear tooth
surface by blunt
The impact of load, which struck gear tooth surface (especially) damage. Common injuries are:
(1) gear transmission is worn gear under normal working conditions, shows the wear uniform angled tooth gear, long wear along the direction
Tooth thickness should
of the tooth should not exceed 30 percent longer,
not exceed usd, Gear tooth surface area of not less than two-thirds, Running gear mesh clearance shall be commonly used, 0.15-0.26 mm to 0.8 mm limit, Gear engagement between 0.10-0.15 mm, should use limit for 0.60
mm. Available batches or soft metal rivalries. If more than clearance method for measuring the pairs, should be replaced.
due to fail to
gear clearance is mainly
(2) gear teeth,
broken tooth
下载翻译器英文翻中文meet the requirements, gear meshing parts or work under great impact load.
If you are not greater than 2mm edge of gear oil can smile ShiXiu
after-grinding continue to use, If the scope or have more than three pairs,
should smile.
(3) often mesh surface of the helical gear often wear face due. 10-0.30
mm, in order to ensure that the axial clearance, if tooth gear good operation within the wear, can repair tank, but the amount of grinding grinding should not exceed. 50.
(4) often meshing gears shaft neck, needle roller bearing and wear into seat hole hole meshing gears seat with needle bearings and shaft neck
with clearance should be 0.01 - three 0.08 mm, otherwise must be changed.
2 the overhaul. Transmission shell
Gearbox shell is transmissions, to ensure the basis of each part of the transmission is correct position, work under load. Common injuries are:
(1) the abrasion of shell bearing hole hole wear will destroy its bearing assembly relation with the bearing, the direct impact of input, output shaft transmission position relative to the hole. Bearing seat with
0-0.03 mm clearance shall be used for the maximum limit, should be replaced
or 0.10 mm) shell or pile hole repair.
(2) shell threaded holes repair note oil ROM plug hole, dumping screw
hole threads connecting bolts damage and between shell
Threaded hole, can take damage with screw repair.
3 transmission shaft of maintenance
Transmission in the process of operation, each bearing the torsional
moment of change, and bending moment, JianChi part is under pressure, impact and sliding friction etc. Various axial load of common injuries are:
(1) the shaft neck and neck too worn wear axis gear axis will not only
offset, and can bring the change gear clearance, when making noise
transmission shaft neck. Also make coordination relationship with bearing
damage, may cause ablation. So roller bearings in a place with no more than 0.02 axis wear mm needle bearing shaft neck wear with place, otherwise
than 0.07 mm landscape change or chrome.
side of the
in stress and more serious
wear JianChi wear
(2) JianChi
spline. JianChi with check, when more than 0.25 or and wear with more than
usd keyway apprentice, gear engagement mm, combining with the gear with JianChi weeks, according to the mm apprentice woodruff key and shaft neck
keyways apprentice to JianChi 0.08 mm over there when the keyway weeks, or should be repaired or replaced shaft.
(3) transmission shaft bending thimble resist transmission shaft with
maintenance on both ends of the roof, using pinhole batches of shaft radial micrometers, check the deviation should be less than 0.10 mm) pressure correction repair.
4 synchronizer overhaul
A. lock ring type inertial synchronizer ring maintenance: lock horns
cone a about six degrees - 7 degrees, in use, cone Angle deformation of
rapid synchronous, and not be change in time. B. B. locking locking locking pin pin pin type type type inertial inertial inertial synchronizer: synchronizer: synchronizer: locking locking locking pin pin pin type type synchronizer major damage for cone rim wear, when, cone-disk cone rim on the thread of groove depth 0.40 mm wear to 010mm deep, should be replaced.
If the cone rim are scratching, face to face, but two turning machining, must not be more than 1mm should be replaced.

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