Differential lock control system of wheeled vehicle drive axle

FIELD: transport engineering; transmissions of wheeled vehicles.

SUBSTANCE: proposed differential lock control system contains fluid medium supply source with reducing 7, three-position distributor 11, two-chamber cylinder consisting of control space A of lock-up clutch 4 formed by its housing and movable partition 34, and additional diaphragm chamber 6 having its control space Б arranged coaxially and in series relative to control space of lock-up clutch 4. Movable partition 34 is connected with pressure disk 29 by means of rod 30 rigidly connected by one end with pressure disk 29. Rod 30 interacts with diaphragm 32 of additional diaphragm chamber 6, and it passes in its middle part through central part of movable partition 34, being rigidly connected with support plate 33 interacting with partition 34. Space Б of additional diaphragm chamber 6 communicates with three-position distributor 11 selectively communicating said spaces with drain main line 14 and reducing regulated valve 7.

EFFECT: increased capacity owing to automatic reduction of locking at cornering of vehicle and decreased skidding of leading wheel.

2 dwg

 

The invention relates to transport machinery and can be used in vehicles.

A device for locking differential driving axle tractor containing a locking differential friction clutch, hydraulic clutch, and a valve connected to the hydraulic cylinder, the steering control of the tractor and manual control (ed. mon. The USSR №350684, M CL 60 To 17/20, 1972).

A disadvantage of this device is that they are provided with lock only one level. If when driving over bumps the differential lock is not switched-off, the wheel propulsion and drive axle will be loaded additional loads that will adversely affect their durability. And if the lock is forced to manually turn off the traction properties of the differential when the vehicle is on the road with different coefficients of adhesion of the wheels will fall, which will lead to increased slipping and reduce the speed of the machine. The disadvantage of this device is that when turning the vehicle differential lock axle completely turns off automatically. But in traction mode with a sufficiently large load on the hook, when the speed of the machine when turning small and sledovatel is but small and acting on the machine centrifugal force, there is a redistribution of the normal load runner wheel backward under the action of a lateral component of the load on the hook that occur when turning the machine. As a result, when unlocked differential runner wheel will increase the speed and skidding, and lagging behind the wheel to reduce its speed. As a consequence, the speed of the machine will be reduced. The same effect when unlocked differential will occur when unequal ratios of the clutch wheel. Wheel-impaired grip will increase the speed and value to stall, and the wheel with a normal grip to reduce their speed. As a result, the speed of the machine, and hence the performance will decrease.

Known steering system of a wheeled vehicle with locking differential driving axle, containing connected with the pump and the working cavity blocking device differential dispenser associated with the steering mechanism and manual control (ed. mon. The USSR №528224, M. class. B 62 D 5/06, 60 To 17/20, 1976).

This system allows you to manually set different levels of locking, and the amount of zone blocking when turning, but at a certain angle of rotation of the idler wheels etc which comes full automatic unlocking of the differential. In the above-described phenomenon of partial discharge runner wheels on the normal load and unequal traction wheels will cause excessive slipping of one of them and reduced the speed of another wheel drive axle and, consequently, reduced the speed of the vehicle as a whole. Push the locking manually requires time that will degrade the speed of the machine, and hence the performance.

A known control system, locking differential drive axle wheeled vehicles, adopted as a prototype, containing a source of pressure fluid with two pressure reducing valves, two-position valve, controlled from the steering wheel and manual traction and communicated with the management of the coupling block formed her body and movable partition associated with pressure disk and the friction disk, the latter and the coupling block is provided with elements rigid connection between a (ed. mon. The USSR №1493498, M CL 60 To 17/20, 1989).

This system provides for straight-line movement of the vehicle high and low levels of locking. However, to obtain a high level locks in the coupling block is necessary to combine elements of estrago connection housing and the friction discs between them, that will require a preliminary stop the vehicle and will reduce its average speed. The disadvantage of this system is that when turning the steering wheel at a certain angle it is fully automatic shut-off differential lock. But as in the traction mode of motion at low speed when turning the vehicle runner wheel drive axle under the action of the transverse component of the load on the hook is partially unloaded from the normal load, when unlocked differential increases the speed of rotation and slippage of the drive wheel and a corresponding reduction in the speed of the lagging wheel. The result is reduced and the speed of the machine. The same phenomenon is observed when unequal ratios of the clutch wheel. Wheel-impaired grip when unlocked differential increases the speed and skidding and wheel with a normal grip reduces its speed. As a result, the speed of the vehicle and reduced performance.

The objective of the invention is the creation of a management system differential lock, providing increased speed of the vehicle by automatically lowering when turning the steering wheel to the desired angle level blokirovki is, exclusive fully automatic unlocking of the differential.

The technical result is increased productivity.

The technical result is achieved in that the control system differential lock drive axle of a wheeled vehicle, containing a source of pressure fluid with a pressure reducing valve, safety valve, controlled from the steering wheel and manual traction and communicated with the management of the coupling block, formed by the body of this clutch and the movable partition associated with pressure disk and the friction disk, equipped with dual-chamber diaphragm cylinder consisting of the above-mentioned control cavity formed by the coupling block and the movable partition, and an additional diaphragm chamber having its control cavity, placed coaxially and sequentially relative to the control cavity of the coupling block, and movable wall of the latter is connected with pressure plate by rod rigidly connected by its end with this pressure disk and installed with the possibility of interaction through fixed on the other end of the support flange with the additional aperture diaphragm chambers, and its Central portion passing through the Central part of the movable bulkhead and ill is to associated with a support washer, installed with the ability to interact with the wall, while the control cavity additional diaphragm chamber communicates with the dispenser, made three position, selectively providing the link mentioned control cavities with a drain line and a pressure reducing valve, is made adjustable.

The supply management system differential lock dual chamber diaphragm cylinder, consisting of the control cavity coupling block formed by the body of this clutch and the movable partition, and an additional diaphragm chamber having its control cavity, placed coaxially and sequentially relative to the control cavity coupling block, allows to obtain a stepped change of level of the differential lock by feeding fluid under pressure simultaneously to both the control cavity, thereby providing a high level block, or only one control cavity, providing a low level lock.

Performing communication by the mobile partition control cavity coupling block with pressure plate by rod rigidly connected by its end with this pressure disk and installed with the possibility of interaction through fixed on the other end of the support flange from the aperture is GMAI additional diaphragm chamber, the cavity which is in communication with the distributor, and its Central portion passing through the Central part of the movable bulkhead and rigidly connected with the supporting washer that is installed with the possibility of interaction with this partition, provides for the supply of fluid under pressure in both the control cavity transfer the total force from the movable partition control cavity coupling block and the additional aperture diaphragm chamber on the pressure plate, thereby allowing to obtain a high level block, and in the absence of pressure fluid from the control cavity of the coupling block and the presence of pressure in the control cavity additional diaphragm chambers transfer of force from her diaphragm pressure disc, thereby allowing get the low-level lock.

The execution of the three-position valve selectively providing communication mentioned control cavities with a drain line and a pressure reducing valve, in one position of the valve corresponding to the rectilinear movement of the vehicle, to receive the communication of both control chambers with pressure reducing valve, ensuring a high level block, in another position corresponding to the steering wheel for a given estimated angle that controls the coupling block with ASAT with the drain line, and the control cavity additional diaphragm chambers to leave associated with reducing valve, providing a lower level of the differential lock when turning the vehicle, excluding its full automatic unlocking and thereby increase the speed, and hence the performance of the vehicle, in the third position of the distributor driven by manual traction, both the control cavity to associate with the drain line, thereby ensuring, if necessary, a complete shutdown of the differential lock.

Perform pressure relief valve provides smooth adjustable manually change the pressure of the fluid in both the control cavities, allowing you to set the specified design value of the moment of the block.

1 shows a schematic diagram of a control system differential lock; figure 2 is a view along arrow a in figure 1.

The device includes a source of pressure fluid, such as oil, in the form of a hydraulic pump 1, the associated suction line 2 tank 3, the clutch 4 locking differential and 5-chamber diaphragm cylinder, consisting of the control cavity And the coupling 4 block and additional diaphragm chamber 6, having its control cavity B, are placed coaxially and sequentially assigns the flax control cavity And, pressure reducing valve 7, associated return line 8 to the tank 3, and the discharge lines 9 and 10 with three position valve 11, selectively providing communication of both control chambers a and B, which are connected respectively to the oil lines 12 and 13, with the drain line 14 associated with the tank 3, and respectively with the pressure lines 9 and 10.

Pressure reducing valve 7 has an adjustable spring 15, which allows smoothly manually change the pressure in the control cavities a and B two-chamber diaphragm cylinder, setting the specified design value of the moment of the block.

Three-position valve 11 is controlled by manual traction 16 associated with the slide valve 17, and the steering wheel 18, kinematically associated with the Cam 19 having a profiled surface and interacting through the plunger 20 and pre-Podiatry spring 21 with the valve 17, the spring on the other side of the spring 22 which presses the spool 17 through pre Podiatry the spring 21 and the plunger 20 to the fist 19. Manual rod 16 has three positions: “On”, corresponding to the first position of the spool 17 of the three-position valve 11, “Ponie.”, corresponding to the second position of the spool 17 of the dispenser, and “Off” corresponding to its third position. The presence of a spring 21 between gold is the IR 17 and the pusher 20 provides the opportunity, if necessary using manual traction 16 to move the valve 17 in the direction of the plunger when it is stationary, as a preliminary preload spring 21 provides the ability to move the plunger 20 with the valve 17 in the direction of the last one.

Clutch 4 block consists of a body 23 that is associated with polovoy gear 24 of the differential gear 5, the locking shaft 25 that is associated with polovoy gear 26 of the differential 5, the friction discs 27, adjustably planted on the splines of the locking shaft 25, and the friction discs 28 installed between the discs 27 and adjustably connected by splines with the housing 23, the pressure disk 29 rigidly connected with one end of the rod 30, which serves as the adder of the axial forces from the oil pressure generated in the control cavities a and B two-chamber diaphragm cylinder. At the other end of the rod 30 is fixed in the role of a piston support flange 31 that communicates with the aperture 32 additional diaphragm chamber 6. And in the middle part of the rod 30 mounted rigidly mounted thereon and performing the role of the second piston thrust washer 33, interacting with a movable partition, made in the form of a diaphragm 34, the control cavity And formed this diaphragm and the wall 35 of the housing 23 of the coupling 4 block. Through the Central part of the diaphragm 34 and the wall 35 of the rod 30 passes with a hermetic seal. The rod 30 is spring-loaded by a spring 36 returns to its original state in the absence of the oil pressure in the control cavities a and B two-chamber diaphragm cylinder. The control cavity B is formed by a cover 37 additional diaphragm chamber 6 and the diaphragm 32.

Half-shaft gear 24 is connected with the gear 38, which drives the left wheel driving axle of the vehicle (not shown), and through the gear satellites 39 installed on the axes 40, fixed in the housing 41 of the differential 5, with polovoy gear 26 that is associated with the gear 42, which drives the right wheel driving axle (not shown). The housing 41 is kinematically connected with the drive shaft 43 and the main transmission having a kinematic connection with the vehicle engine (not shown).

Management system differential lock axle wheeled vehicle works as follows.

In straight-line motion of the vehicle on a level surface with the hook load to improve traction properties of differential last 5 blocks. This manual rod 16 is switched to the “On”position. The spool 17 of the three-position valve 11 when it is installed in the first position. In the pressure line 10 is connected by the three-position valve 11 with an oil line 13 and forth with the control cavity B additional diaphragm chamber 6, and the discharge pipe 9 is connected with Mas is Jana highway 12 and then with the control cavity And the coupling 4 block. The oil pressure in the control cavities a and B two-chamber diaphragm cylinder, install a pressure reducing valve 7, creates efforts through the aperture 32, and 34 of these cavities in the mounting flange 31 and the washer 33. These efforts are summarized by the rod 30 and is transmitted to the clutch disk 29, which compresses the pack of friction discs 27 and 28 in the housing 23 of the coupling 4 block, forming a frictional connection of the housing 23 with the locking shaft 25. Differential 5 is blocked. And if the difference between the moments at the wheel driving axle is insufficient to overcome the friction point of the clutch 4 block, half-shaft gear 24 and 26 and the housing 41 of the differential 5 will rotate as a unit with the same velocity, and the lead time transmitted from the drive shaft 43 of the main transmission casing 41 of the differential 5, will be split between the gears 38 and 42 is proportional to the resistance on the wheel axle.

If necessary, such as in the case of movement on uneven bulk-load on hook, the level differential lock can speed lowering, moving hand rod 16 in position “Ponie.”. The spool 17 of the three-position valve 11 will be moved to the second position and will connect the oil line 12 with the drain line 14, and the oil line 13 leave related to the pressure of the master is calling 10. In the control cavity And the coupling 4 block will be associated with the tank 3, the oil pressure will drop, and the pressure plate 29 and the rod 30 will be transmitted force only from the oil pressure in the control cavity B additional diaphragm chamber 6. Axial compression of the package of the friction discs 27 and 28 will decrease, which will reduce the friction point of the clutch 4 blocking and lowering thereby the lock level. If necessary, the lock level can be lowered even more by the smooth manual adjustment of the spring 15. As a result, the differential is unlocked with a smaller difference of the tractive force at the wheels, preventing the transfer wheel drive axle going more the way of bumps on the movement Hughes, thereby eliminating the occurrence of parasitic circulating power. At the same time having a low level differential lock will contribute to the reduction of slippage of the wheels, the clutch is partially impaired or normal load which when driving over bumps partially redistributed to another wheel drive axle, which ultimately will lead to the increase in the speed of the machine.

With good traction wheels for a complete shutdown differential lock manual rod 16 is switched to the position “Off”. The spool 17 tranposition the tion of the distributor 11 is placed in the third position and connects the oil line 12 and 13 with the return line 14. The result is that both the control cavity a and B are connected with the hydraulic tank 3. Pressure drops. Under the action of the spring 36 of the stem 30 removes the pressure disc 29 from a pack of friction discs 27 and 28, and frictional connection of the housing 23 with the locking shaft 25 is stopped. Comes complete unlocking of the differential at which the wheel is able to rotate at unequal speeds, the unequal ways, navigable these wheels when driving over bumps.

When turning the vehicle in traction mode, when the hook has a fairly heavy load, while the steering wheel 18 has not reached the specific calculated angle of rotation, the spool 17 of the three-position valve 11 is in the first position providing communication control chambers a and B with pressure lines 9 and 10, and therefore the presence of these cavities pressure. As a result, the differential remains completely blocked. Upon reaching the steering wheel 18 of the calculated rotation angle is kinematically associated with the Cam 19, turning translates by means of the pusher 20, the pre-bogatoi spring 21, the valve 17 three-position valve 11 in the second position, overcoming thus the force of the spring 22. In the control cavity And the coupling 4 block is associated with hydrob is com 3, and the oil pressure in it drops. In the cavity B of the additional diaphragm chamber 6 oil pressure continues to act. Occurs stepwise lowering of the differential lock. Compared to a fully locked differential is significantly reduced resistance to rotation of the vehicle, and at the same time when you hit one wheel drive axle to the surface with inferior adhesion of the presence of low level locks promotes the redistribution of the greater part of a driving torque to the wheel with a normal grip, preventing a significant increase of slippage of the wheel impaired adhesion by limiting the growth of its angular velocity. This will help increase the speed of the vehicle and, therefore, increase its performance. In addition, when turning in traction mode, when the vehicle is moving at relatively low speed and has a fairly large load on the hook, resulting in the rotation of the transverse component of this load will be redistributed normal load runner wheels at the back. In the runner wheel will seek by increasing the speed of rotation to increase the slip. The presence of low level differential lock will reduce the work to increase the speed of rotation and slippage runner wheels and therefore, to prevent the reduction of the rotation speed of the lagging wheel, which ultimately will increase the speed of the vehicle, and thus its performance.

If necessary, for example when turning the wheel moving along a substantial irregularities, a differential gear 5 can be fully unlocked by moving the manual rod 16 in position “Off”. The spool 17 of the three-position valve 11 will occupy the third position, breaking the force of the spring 22. Both the control cavity a and B are linked by the three-position valve 11 with the tank 3, the pressure oil in them decreases, and the differential is fully unlocked. When the other needed, for example when turning the vehicle one wheel loses traction, the differential 5 of hypovigilance lock can be translated to full lock. This manual rod 16 is switched to the “On”position. The spool 17 of the three-position valve 11 is moved to the first position. When this is overcome the force of the pre-bogatoi spring 21. Both the control cavity a and B are linked by the three-position valve 11 with the pressure lines 9 and 10. Arisen in these cavities the oil pressure provides full differential lock.

When switching from mode p is the gate, when the differential 5 drive axle of the vehicle had a lower level of locking in rectilinear motion with the return of the steering wheel 18 in the straight-ahead position of the vehicle is kinematically associated with the steering wheel, the Cam 19 is rotated back to its original state. Under the action of the spring 22, the valve 17 three-position valve 11, together with the spring 21 and the pusher 20 is moved from a second position into the first. In the control cavity And the coupling 4 block connects three position valve 11 with the pressure line 9 and together with the cavity B of the additional diaphragm chamber 6 under oil pressure, provides full differential lock.

By adjusting the preload of the spring 15 and the pressure reducing valve 7 in the control cavities a and B two-chamber diaphragm cylinder to install the oil pressure, ensuring the specified design value of the moment of the block.

Thus, the supply management system differential lock automatic demotion lock when turning the vehicle, excluding the full unlock the differential, helps reduce slippage runner wheel, thereby increasing the speed of the vehicle, sledovatelno, and performance.

Management system differential lock drive axle of a wheeled vehicle, containing a pressure source current environment with reducing valve, safety valve, controlled from the steering wheel and manual traction and communicated with the management of the coupling block, formed by the body of this clutch and the movable partition associated with pressure disk and the friction disk, characterized in that it is equipped with dual-chamber diaphragm cylinder consisting of the above-mentioned control cavity formed by the coupling block and the movable partition, and an additional diaphragm chamber having its control cavity, placed coaxially and sequentially relative to the control cavity of the coupling block, and a movable the last partition is associated with pressure plate by rod rigidly connected by its end with this pressure disk and installed with the possibility of interaction through fixed on the other end of the support flange with the additional aperture diaphragm chambers, and its Central portion passing through the Central part of the movable bulkhead and rigidly connected with the supporting washer that is installed with the possibility of interaction with this partition, when this control is th cavity additional diaphragm chamber communicates with the dispenser, made three position, selectively providing the link mentioned control cavities with a drain line and a pressure reducing valve, is made adjustable.



 

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FIELD: transport engineering; transmissions of wheeled vehicles.

SUBSTANCE: proposed differential lock control system contains fluid medium supply source with reducing 7, three-position distributor 11, two-chamber cylinder consisting of control space A of lock-up clutch 4 formed by its housing and movable partition 34, and additional diaphragm chamber 6 having its control space Б arranged coaxially and in series relative to control space of lock-up clutch 4. Movable partition 34 is connected with pressure disk 29 by means of rod 30 rigidly connected by one end with pressure disk 29. Rod 30 interacts with diaphragm 32 of additional diaphragm chamber 6, and it passes in its middle part through central part of movable partition 34, being rigidly connected with support plate 33 interacting with partition 34. Space Б of additional diaphragm chamber 6 communicates with three-position distributor 11 selectively communicating said spaces with drain main line 14 and reducing regulated valve 7.

EFFECT: increased capacity owing to automatic reduction of locking at cornering of vehicle and decreased skidding of leading wheel.

2 dwg

Final drive // 2247038

FIELD: transport engineering.

SUBSTANCE: proposed final drive contains housing with oil reservoir, driven bevel gear and driving bevel gear with front and rear taper bearings whose outer races are press-fitted in bearing cup, and oil collecting pocket. Holes to let oil in and out are made in housing and bearing cup. Plate-type oil slinger with hole in central part is installed in cup between bearings. Diameter of slinger hole is less than inner diameter of front bearing outer race.

EFFECT: improved efficiency of lubrication of bearing of final drive driving gear.

FIELD: transport engineering; automobiles, tractors, diesel locomotives.

SUBSTANCE: proposed vehicle stepless transmission contains final drive, differential 4 and step-up drive, brake device 13, overrunning clutch 21, damper 22 and regulator 14. Driven gear 3 of final drive is rigidly engaged with case of differential 4. Differential gears 6, 8 are engaged with driven shafts 7, 9. Shaft 7 transmits torque to drive wheels (tracks, screw, etc). Shaft 9 sets brake device 13 into motion through step-up drive. Overrunning clutch 21 and damper 22 are fitted on shaft of brake device 13.

EFFECT: reduced losses of torque, prevention of shock loads.

2 cl, 1 dwg

FIELD: the invention refers to transport machinery.

SUBSTANCE: latching differential has a differential gear 4, a blocker and a control device. The control device has a scheme of measuring and comparison and sensors of a wheels angular speed in the shape of tachometers 11 and 12, kinematically connected with half-axles 9 and 10. The scheme of measuring and comparison includes differential links 13 and 14 and summing units 15 and 16 of angular accelerations, and an electro-chain of connection to a servo-motor 22 has intensifiers 19 and 20 and a relay of time 21. Differential links 13 and 14 are electrically connected with the sensors of wheels angular speeds. The differential realizes automatic blocking only at skidding of any driving wheel and does not react to other exterior disturbing influences. The control device works on the principle of comparison of an angular speeding up of a skidding wheel with given critical meaning equal to maximum possible speeding up at which skidding is still impossible.

EFFECT: decreasing of dynamic loads on transmission and drive and increasing reliability and longevity of a vehicle.

1 dwg

FIELD: transport mechanical engineering.

SUBSTANCE: differential comprises housing (1) with spider (2) and satellites (3), differential gears (4) and (5), locking hydraulic clutch, planet gear, and control system. The locking hydraulic clutch has housing (6) provided with driving friction disks (7) and driven friction disks (8) connected with housing (1). The control system comprises control unit (14), electric motor (15), pickups (16) of angular velocity, pickups (17) of torque, pickups (18) of linear velocity, and pickups (19) of angle of rotation of the steering wheel. The planet gear has carrier (12) provided with two rows of satellites (10) and (11), solar gear (13), and epicycloid gear (9). Solar gear (13) is connected with one of the differential gears (9), carrier (12) is connected with electric motor (15), and epicycloid gear (9) is connected with housing (6).

EFFECT: enhanced efficiency.

1 dwg

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