Device for automatic hydraulic blocking of differential

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly to lock engines of differential. Mechanism of automatic blocking of differential consists of hydraulic pump with toothed wheels, two valves, isolated in open condition by springs and intermediate shafts with intermediate toothed wheels. Mechanism of hydraulic blocking of differential is in the space between differential pinion and axle shaft gear and is enclosed into case. Toothed wheels of hydraulic pump are blocked with two intermediate toothed wheels, which are engaged with other couple of intermediate toothed wheels. Intermediate toothed wheels are blocked to differential pinions. Casing is filled by working liquid for major part of its volume and by its journal bears on two bearings, compressed into semi-axial toothed wheels.

EFFECT: increasing of mechanism durability and providing of blocking of differential at growing of difference between number of revolutions of wheels.

3 dwg

 

The differential mechanism allowing rotation of the wheels of a drive axle of a vehicle at different speeds. Differential reduces the resistance to movement and prevents excessive wear of transmission components and tyres when driving vehicle on rough roads and turns.

Sometimes wheels are so different in terms of adhesion with the road surface, there is a slippage of one of the wheels, which leads to the stop of the vehicle, and in these cases, a useful property of the differential gives a negative effect. To fix it use different devices:

Mechanical locking device differential spline coupling connects the axis in one; the other is a coupling clutch disks which are compressed by the diaphragm Gidrostroy and connect the shafts together.

(Vmmenu. “Tractor”. M. “The Wheel”. 1977, str, 137.)

Disadvantages: to lock the axes, you must stop the vehicle; the control mechanism is implemented through a system of connecting the body of the control differential.

Limited slip differential (installed on the GAZ-66).

(Everyelse. “Motor vehicle”. M. “Engineering”. 1987, str, 236.)

Disadvantages: high load on the details of the differential, high demands on the materials, the C which manufactured parts. This differential reduces the efficiency of the vehicle makes the turn of the vehicle, does not preclude slippage of the wheel.

The tractor Kirovets fitted with a device transmitting power only lagging behind the wheel.

(Meganubis. M. “The Wheel”. 1978, str, 142.)

Cons: the complexity of the device, additionally, it is not suitable for installation on high-speed vehicle, as it can reduce the directional stability of the latter.

Prototype: the device described in the book “cars” authors Vsebina and Vahalia, M. “Education”, 1993, p.85. Differential lock is a friction clutch, the friction force which increases with the transmitted torque.

Disadvantages: availability of consumable items; lock occurs when the increase in the transmitted torque, and not with increasing difference of the rotation speeds of the wheels.

The purpose of this work is the mechanism devoid of the listed deficiencies. The device of the automatic hydrobiocenose differential. In figure 1, 2, 3:

1 - body hydraulic pump

2 - gear hydraulic pump

3, 6 - shaft

4, 5 - idler gear

7 - satellite

8 - the valve guide

9 - Carter mechanism

10 - seal

11 - pin crankcase

12 - bearing

13 - half-shaft gear

14 - Axel

15 - valve

16 - spring

17 - bolt

Longitudinal geometric axis axis normal to the plane of figure 1, in which the crankcase of the engine is not marked. The hydraulic pump is rigidly fixed inside the crankcase, the mount is not marked. Automatic hydrobiocenose differential (MAGD) is in the space between pausetime gears 13 and 7 satellites differential.

The shaft 6 with the gear 5 in the Assembly to form a unit with satellite 7, the same gear 2 with the shaft 3 and the gear 4. Gear 4 and 5 are in constant engagement. Gear 2 and the housing 1 to form a hydraulic pump having two valve 15, which can move in the guide 8, is attached to the housing 1 by bolts 17. The valve 15 is held in the initial position by the compression spring 16. Such a device valve allows the pump depending on the rotation of the gears in one direction or another to suck the liquid through a given valve, opposite the cavity of the hydraulic pump becomes in pressure. MAGD is in the crankcase 9, which two pins 11 is supported by bearings 12, is pressed into the half-shaft gear 13. The crankcase 9 is filled with the working fluid for a large part of its volume, the tightness of it is provided by seals 10.

The work of MAGD

When driving vehicle on a flat straight road half-shaft gear 13 rotate at the same speed, satellites 7 does not rotate around with the both axes and does not transmit the rotation of the gear 2 of the water pump. When driving vehicle at high speed on the curve of large radius or at a low speed in an arc of small radius, minor road irregularities, the difference between the speeds of rotation of the half-shaft gears is small, the valve 15 remains open, working fluid freely flows through the pump without creating resistance to rotation of 7 satellites around their axes. With increasing difference of the rotation speeds of the wheel that occurs when the slippage of one wheel, increasing the speed of rotation of the satellite around its axis, the working fluid overcomes the resistance of the spring 16 and releasing the valve is closed, allow the valve remains open, the fluid trapped in the injection cavity pump, prevents the rotation of the gears 2, inhibits the rotation of the satellite around its axis, is the differential lock. As the alignment of the resistance of rotation of the wheels of the drive axle pressure in the discharge cavity of the hydraulic pump decreases, producing the valve under the action of the spring 16 is opened, the differential is unlocked. All the details of MAGD are lubricated and cooled by the working fluid.

Automatic hydrobiocenose differential, characterized in that it consists of a hydraulic pump having two valve supported in the open position by the springs, gears of which is interlocked with two ex is CNAME gears, which are in engagement with another pair of intermediate gears interlocked with the satellites of the differential, it all goes into the crankcase, supported by two pivots on two bearings pressed into half-shaft gear differential.



 

Same patents:

FIELD: transport.

SUBSTANCE: invention relates to vehicle transmissions, particularly, to differentials with automatic wheels locking. The proposed differential comprises drive housing accommodating moving ball closed chains incorporating with half-axle components. The said components are fitted aligned on half-axles. The drive element represents a plate, the ball chains being fitted in the holders furnished with axles mounted in through slots of the drive housing at equal radial distance from the drive housing axis. The ball chains are arranged so as to allow the balls to pass along the variable-depth figurate paths arranged in symmetry on the flange opposite end faces. The said flanges seat on the aforesaid half-axle elements.

EFFECT: higher reliability, compact design.

6 cl, 6 dwg

FIELD: transport.

SUBSTANCE: proposed gearbox incorporates an input and output shafts running in bearings and a lay shaft arranged parallel to the said input and output shafts. The output and lay shafts are furnished with the supports in the gearbox housing intermediate wall. The input shaft rear end is fitted in the output shaft end. The input shaft comprises a reverse drive gear and three forward running gears made integral with the aforesaid shaft. The input shaft supports also dual-direction gear free running thereon and accommodating a two-position coupling. One driven gear runs free on the output shaft end, while two other driven gears are fitted on the output shaft unfixed with a three-position coupling arranged there between. Three drive gears, dual-direction gear and three forward running driven gears in mesh with the input and output shaft gears run on the lay shaft. The reverse gear is fitted unfixed on the lay shaft to engage with the additional reverse gear. The said lay shaft supports two unfixed three-position coupling seating between the lay shaft gears. Similar coupling is fitted on the output shaft end.

EFFECT: reduced metal input, higher efficiency.

2 dwg

FIELD: machine building.

SUBSTANCE: invention relates to vehicles, in particular to self-locking differential gears and can be used in both transfer box and wheel gears. The propose vehicle differential gear comprises the housing, final drive, differential gear housing with half shaft gears and cams fitted therein. The said half shaft gears are in mesh with differential pinions. The said cams are helically-cammed with half shaft gears to get in contact with the push rods furnished with rollers. The thrust bearing is fixed on the reduction gear housing, the bearing movable race features a cam-like surface to interact with push rod rollers. The bearing cage inner surface features helical grooves or a diametral bore with through holes. The coupling holds the cage down to the thrust bearing fixed race with the help of plate spring.

EFFECT: mechanical control over differential gear capable of distinguishing between slipping and normal operating conditions.

9 dwg

Bevel gear // 2341385

FIELD: transport.

SUBSTANCE: bevel gear contains casing (1) with opposite axle shaft gears (2, 3) axis of channel whereof forms acute angle with casing rotation axis of channel. On differential pinion axis (6) collets (10) are installed capable of shift along axis. Pinions (4, 5) engage with collets and penetrating into narrowed zone located between axle shaft gears are seized transmitting torque to stopped axle shaft gear and stopping slippage.

EFFECT: increase of bevel gear slippage properties.

5 dwg

FIELD: machine building.

SUBSTANCE: invention relates to transport machine building, in particular, to automotive and tractor driving axles. The self-locking differential incorporates housing (2), driven gear wheel (1), output half-axles (7), two free travel mechanisms, driving gear coupling (4) with end face trapezoidal teeth and two driven half-couplings with the like teeth rigidly coupled with the free travel mechanism driven cages (6). Gear coupling (4) with the end face trapezoidal teeth is linked with housing (2) to axially move. The distance along the axis between the tooth crests of one and the tooth space of the other driven half-coupling equals the axial distance between the driving coupling (4) crests. The number of end face teeth of each half-coupling is a multiple of the number of locking bodies (8) of the free travel mechanisms. Both such mechanisms are arranged so that, on cutting in, the driven half-coupling crests get aligned with the driving coupling (4) tooth spaces. The driven half-coupling and driving coupling (4) teeth feature an identical profile.

EFFECT: higher safety of vehicles and simpler design of self-locking differential.

2 dwg

FIELD: mechanic.

SUBSTANCE: the self-blocking differential contains a power-driven shell with lids, in which half shaft elements are placed coaxially and connected with the half shaft. The half shaft elements, on their external surface, have spiral grooves with a semi-circular cross-section, the direction of which is reverse to that of the spiral, rolling elements (balls) filling the closed channels in the power-driven shell, in chains. The closed channels contain working grooves open for inserting ball segments into the spiral grooves. The longitudinal bypass channels and the side return channels are formed by slots in the lids and cuts around the perimeter of the distribution washers installed on the half shaft elements. The distribution washers have a diameter equal to the working groove dimension.

EFFECT: increases reliability of self-blocking differential.

2 cl, 1 dwg

FIELD: mechanic.

SUBSTANCE: the self-blocking differential contains a power-driven shell with lids, in which half shaft elements are placed coaxially and connected with the half shaft. The half shaft elements, on their upper surface, have spiral channels running in a direction opposite the spiral, odd number of rolling elements (balls), one closed channel containing a working groove open for inserting ball segments into the spiral channels of the half shaft elements; a longitudinal return channel with dimensions equal to the ball diameter, connected by intermediate channels made in the lids of the power-driven shell. The outside surface of the intermediate channels in the longitudinal section has a radius equal to 1.25 diameters of the ball; and their wall, at the outlet to the zone of connection to the return channel, contains a straight section. In the lids, a slot with dimensions equal to those of the working groove is made for placement of spiral channels of the half shaft elements in the intermediate channels area.

EFFECT: increased reliability of self-blocking differential.

4 cl, 2 dwg

FIELD: transport engineering; vehicle transmissions.

SUBSTANCE: invention can be used in differential drives of vehicles with possibility of automatic wheel locking. Proposed self-locking differential of vehicle contains drive case accommodating axle-shaft members coupled with axle shafts and provided on outer surface semi-round in cross section screw grooves of opposite hand of helix, solids of revolution in form of balls filling, in chain, closed channels made in drive case and containing working grooves opened to dip ball segments into screws of axle-shaft members, longitudinal bypass channels and side return channels. Inner part of case consists of three parts. On extreme parts working grooves are made with opposite direction of helix relative to each other and to screw grooves of axle-shaft members. Middle part is made with width not exceeding diameter of balls and is furnished with through axial holes corresponding to size of diameter of balls. Angle of tilting of working and screw grooves to longitudinal axis is 74-76°. Side return channels in longitudinal section are made with sizes steplessly increasing from diameter of ball on ends of channels to 1.5 diameter of ball in central part of channels. Longitudinal bypass channels in cross section are made to size of diameter of ball, and inner side of channels is made at angle of 1-2° to center of bypass channel, with stepless transition in place of connection.

EFFECT: improved reliability and efficiency of locking.

4 cl, 3 dwg

FIELD: automotive industry.

SUBSTANCE: invention can be used in differential drives of wheeled vehicles made for automatic locking of wheels. Proposed self-locking differential of vehicle contains drive case 1 accommodating axle shaft-members 4, 5 arranged coaxially to each other and coupled with axle-shafts 2, 3. Said axle-shaft members are provided with helical grooves 6, 7 on outer surface with opposite hand of helix, solids of revolution in form of balls 8 filling in line at least one closed channel 10 made in drive case. Part of said channel is opened to dip segments of balls into helical grooves. Closed channel 10 is made rectangular in longitudinal section, with rounded off outer angles 12. Cross section of legs of rectangular closed channel is equal to diameter of balls 8. Number of balls in channel is odd.

EFFECT: simplified design of differential, reduced overall dimensions, increased manufacturability, strength and efficiency at self-locking.

4 dwg

FIELD: mechanical engineering; vehicle transmissions.

SUBSTANCE: proposed differential contains case 1, side gears 2, and 3, planet pinions and locking device. Locking devices is made in form of ring shifter 7 connected with drive 8, pushers 10 arranged inside axles 9 of planet pinions, intermediate members and locking members. Differential includes also elastic stop, and spring inserts 17 and 18 placed between case 1 and rear surfaces 20 and 21 of side gears 2 and 3. Grooves are made on end face front surfaces of side gears 2 and 3. Said grooves have wavy profile corresponding to profile of locking members, and number of radial grooves is even.

EFFECT: prevention of failure of differential lock caused by wedging of locking members between side gears, and falling out of locking members at unlocking, provision of stepless row of values of locking coefficient.

5 cl, 6 dwg

FIELD: transport.

SUBSTANCE: proposed method of controlling multi-drive vehicle differentials consists in locking differentials for preset time intervals, on reaching threshold values of mismatch in cinematic parametres of driving wheels, and in unlocking differentials at expiry of aforesaid time intervals, or on reaching threshold values of controllability ratio. Note here that, in locking differentials of the first drive axle and bogie, differentials of the second and next driving axles and bogie are locked at expiry of certain time intervals, not exceeding the ratio of distance from the first to second and subsequent driving axles and bogie to the speed of multi-drive wheeled vehicle.

EFFECT: increased efficiency of multi-drive wheeled vehicle running gear in adverse weather and road holding conditions.

6 dwg

FIELD: machine building.

SUBSTANCE: invention relates to vehicles, in particular to self-locking differential gears and can be used in both transfer box and wheel gears. The propose vehicle differential gear comprises the housing, final drive, differential gear housing with half shaft gears and cams fitted therein. The said half shaft gears are in mesh with differential pinions. The said cams are helically-cammed with half shaft gears to get in contact with the push rods furnished with rollers. The thrust bearing is fixed on the reduction gear housing, the bearing movable race features a cam-like surface to interact with push rod rollers. The bearing cage inner surface features helical grooves or a diametral bore with through holes. The coupling holds the cage down to the thrust bearing fixed race with the help of plate spring.

EFFECT: mechanical control over differential gear capable of distinguishing between slipping and normal operating conditions.

9 dwg

FIELD: transport.

SUBSTANCE: through hypoid final drive contains crank case (1) of reduction gear, drive collar (2) installed on drive shaft (3) and connected with center differential via gearing. Driving gear (4) is installed on drive shaft (3) and it is connected with driven gear (18) made as one whole with center differential cup (11). One semi-axle pinion (22) of centre differential is connected with driving hypoid gear (7) installed on tapered bearings (5) and (6). Other semi-axle pinion (21) of centre differential is connected with through shaft (25) of rear final drive horizontal axis of which is located below inter-wheel differential gear (26) axis via gearing. Driving gear (15) of gearing is connected with semi-axle pinion (21) and it is installed on bearings (16) and (17). Driven gear (23) is connected with through shaft (25) of rear final drive.

EFFECT: increase of service life of cardan shaft connecting through hypoid final drive with gear-box, increase of service life of hypoid drive.

2 cl, 3 dwg

Bevel gear // 2341385

FIELD: transport.

SUBSTANCE: bevel gear contains casing (1) with opposite axle shaft gears (2, 3) axis of channel whereof forms acute angle with casing rotation axis of channel. On differential pinion axis (6) collets (10) are installed capable of shift along axis. Pinions (4, 5) engage with collets and penetrating into narrowed zone located between axle shaft gears are seized transmitting torque to stopped axle shaft gear and stopping slippage.

EFFECT: increase of bevel gear slippage properties.

5 dwg

FIELD: transport.

SUBSTANCE: invention refers to transportation equipment. Drive axle (1) includes crankcase (2) where main bevel gearing (3) with input shaft (5), drive gear (4) and driven gear (6) are located. Driven gear may be installed on one of mounting seats (27) or on casing (7) of symmetrical planetary differential (9) connected by sun gear (17) and carrier (12) with respective shafts (18) and (19) of wheel drives. Drive axle (1) of all-wheel-drive vehicle is made with control device (20) for differential (9) connected with carrier (12) and casing (7) of differential (9). Axles (13) are fixed in carrier (12) to avoid rotation and axis shift by check plates (36) in slots (37) of axles (13) of planetary rollers (14), (15) and in grooves (38) of part (11) of carrier (12) made as a lid.

EFFECT: simplification of construction design and enhancement of device reliability.

8 cl, 9 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to motor industry. The rpm controller represents a device incorporating a planetary differential gear with driving spider (2) and two various-diameter gear wheels (5, 12). Central gear wheel (5) runs opposite to the running spider (2) to transmit engine power to output shaft (6) via the reduction gear that changes the direction of rotation. Central gear wheel (12) runs in the same direction with spider (2) to transmit rotary motion to output shaft (6) via friction clutch (13). Adjusting actuator with a controlled signal, a function of the engine shaft rpm, varies the rotary motion transmission ratio and allows accelerating or decelerating output shaft (6) along with changing the transmission ratio from its maximum to zero.

EFFECT: automatic adjustment of the engine rpm with variation of transmission ratio in transient behavior.

1 dwg

FIELD: machine building.

SUBSTANCE: wheel planetary gearbox consists of driving bevel gear (1), installed at semi-axis (2), driven bevel gear (3), installed at the axle splines (4), cone satellites (5), installed at cross pins (6). Pins (6) are installed in the mating holes of internal body (7) and external body (8). Bodies (7, 8) are mutually connected by bolts (9). A deepening for thin-wall sleeve (10) is provided at the bodies' mating location, at bodies' external surface. Sleeve (10) is installed flush to the external surface of bodies. Circular grooves are made in the deepenings of bodies (7, 8) from different side of cross pins (6). O-rings (11) are installed in the circular grooves. The internal surface of thin-wall sleeve (10) interacts with O-rings (11).

EFFECT: simplification of sealing of mated surfaces of internal and external bodies; maintaining the overall dimensions of gearbox; ensuring sufficient strength the tho gearbox.

1 dwg

FIELD: mechanic.

SUBSTANCE: the self-blocking differential contains a power-driven shell with lids, in which half shaft elements are placed coaxially and connected with the half shaft. The half shaft elements, on their external surface, have spiral grooves with a semi-circular cross-section, the direction of which is reverse to that of the spiral, rolling elements (balls) filling the closed channels in the power-driven shell, in chains. The closed channels contain working grooves open for inserting ball segments into the spiral grooves. The longitudinal bypass channels and the side return channels are formed by slots in the lids and cuts around the perimeter of the distribution washers installed on the half shaft elements. The distribution washers have a diameter equal to the working groove dimension.

EFFECT: increases reliability of self-blocking differential.

2 cl, 1 dwg

FIELD: mechanic.

SUBSTANCE: the self-blocking differential contains a power-driven shell with lids, in which half shaft elements are placed coaxially and connected with the half shaft. The half shaft elements, on their upper surface, have spiral channels running in a direction opposite the spiral, odd number of rolling elements (balls), one closed channel containing a working groove open for inserting ball segments into the spiral channels of the half shaft elements; a longitudinal return channel with dimensions equal to the ball diameter, connected by intermediate channels made in the lids of the power-driven shell. The outside surface of the intermediate channels in the longitudinal section has a radius equal to 1.25 diameters of the ball; and their wall, at the outlet to the zone of connection to the return channel, contains a straight section. In the lids, a slot with dimensions equal to those of the working groove is made for placement of spiral channels of the half shaft elements in the intermediate channels area.

EFFECT: increased reliability of self-blocking differential.

4 cl, 2 dwg

FIELD: transport engineering; mechanical engineering.

SUBSTANCE: planetary gear driven in two-speed final drive of axle is installed in drive pinion case. Ring gear 23 is mounted on hub 24 made integral with clutch member 26 for rotation relate to hub 10 of carrier and is made for connection by clutch 27 with clutch member 32 belonging to case 14. Carrier hub 10 is constantly coupled by connecting clutch 8 with driven shaft and it is arranged coaxially to drive and driven shafts. Connecting clutch 8 has external teeth 9 engaging with teeth of clutch 27 connecting driven and drive shafts with ring gear hub. Drive shaft 15 is installed on additional bearing 17 fitted in bore 18 of driven shaft 3. Hub 24 ring gear with clutch member 26 is installed on bearing resting on carrier hub.

EFFECT: slowed down speeds, increased cross-country capacity of vehicle.

3 cl, 1 dwg

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

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