Self-locking differential cam
The invention relates to the transport industry, in particular to the structure of the cross-axle differential mechanisms. The differential includes coaxial inner 1 and outer 2 stars and is located between them were taken with breadcrumbs 3. The surface of crackers 3 in contact with the lobes of the inner sprocket 1 made in the form of 3 paired plots - 2 concave with a curvature corresponding to the arc of the Cam inner sprocket 1, and located between them, convex. The technical result is an increase in smooth operation, reliability, durability differential in vehicles with high cross. 4 Il.
The invention relates to a transport engineering, and more specifically to the structure of the cross-axle differential mechanisms.
Known self-locking differential Cam, satisfying the basic equation of kinematics, differential, contains coaxial inner and outer Cam sprocket located between them drove (separator) with crackers (plungers), while sliding in the holes of the carrier and the Cam surfaces of stars .
The sliding friction of crackers on the carrier and the surface of the Cams Svisloch bridge due to the different conditions of adhesion of the wheels with the ground.
A significant disadvantage of this technical solution is that the surface of the Cam inner sprocket and contacting the surface of the crackers have profiles that are directed to each other by the convex sides. This, as shown by theoretical and empirical research, provides a very small area of contact between these surfaces, contributes to their rapid deterioration and disturbance of the kinematic compliance of the contacting surfaces of the parts, which leads to unevenness in the differential and it stuck.
The technical result achieved by the claimed solution is a significant increase in the area of the contacting surfaces of crackers and sprockets, enhancing the smooth operation, reliability and durability of the differential of the vehicle.
This result is achieved in that in cambiocorsa Cam differential containing coaxial inner and outer sprocket and located between them were taken with crackers, simultaneously sliding along the surface of the stars and in the holes of the carrier, the surface of the crackers that come in contact with the lobes of the inner sprocket is made in the form of 3 paired plots - 2 concave with a curvature which technical solution is illustrated in the drawings, where:
Fig.1 is a longitudinal section of the Cam conventional prefilled auto-disable differential.
Fig.2 - section a-a in Fig.1.
Fig.3 - type B on crackers installed in the driver differential.
Fig.4 is a geometric construction of Cam profiles of the inner and outer sprockets and crackers conventional prefilled auto-disable Cam differential.
Self-locking differential Cam includes an inner 1 and outer 2 stars and the twenty-four rusk 3 located in a radial hole drove 4 two rows with shift them around the circumference of a half-step and fixed against rotation flats 5 and spacer rings 6 and 7. Led 4 is connected to the Cup 8 of the differential housing and is a leading link. Stars are slave units.
On the outside of the sprocket 2 evenly spaced around the circumference of the six Cams 9, on which slide the crackers 3 both series. On the inside of the sprocket 1 has two independent series of six evenly spaced around the circumference of the Cam 10, which also slide crackers 3. The Cams 10 of one row are displaced circumferentially relative to another row of a half-step. Working surfaces of the Cams 9 and 10 stars 1 and 2 is carried out by arcs of circles. The profile of the Cam 10 inner sprocket 1 obezdka 2 is formed of arcs of circles with centers at the points and the corresponding radii.
Working surfaces crumbs 3 Cam differentials also perform on arcs of circles. The profiles of these surfaces symmetric about the midline OO1and formed by arcs of circles with centers at the points C, C1, D and E. the Profile of rusk, working on the inner sprocket 1 has three paired plots, two of which are concave with the centers of arcs of circles C and C1and the third, located between them - convex with center D. This is in comparison with the prototype increases when the mechanism of the contact area of crackers and sprockets, most significantly in a pair of biscuit and internal asterisk on the biscuit more than 3 times.
Flat flats on the side of rusk 3 do not allow rotation of rusk in the nest drove install spacer rings 6 and 7 between the rows of crackers.
Works with a limited-slip differential as follows.
If the angular velocity of stars are the same, then the breadcrumbs 3 with respect to the stars and drove remain motionless. This occurs when the vehicle is moving in a straight and level road. When driving on turn one star associated with the runner wheel, ahead of the leading led and the other sprocket is exactly the same behind him.
At the same time, vodka they move on the surface of the Cams. The opposite ends of the crackers are similarly inclined surface of the other stars, causing it to rotate with angular velocity greater than the angular velocity drove.
The sliding friction of crackers on the carrier and the surface of the Cams provides the differential lock when the difference between the torque axes, which gives rise increasing the vehicle.
The use of conventional prefilled auto-disable Cam differential of the vehicle, installed in the leading bridges, makes better use of the coupling weight attributable to the drive wheels to increase traction on the wheels, increases permeability, increases the possibility of driving on slippery slopes, improves the stability of motion in heavy traffic conditions.
Sources of information
. Differential wheeled vehicles /A. F. Andreev, V. Century Vantsevich, A. H. Liferov. Under the General Ed. by A. H. Legerova. - M.: Mashinostroenie, 1987. - 176 p; ill. with 71-75 prototype.
Self-locking differential Cam containing coaxial inner and outer sprocket and located between them were taken with crackers, while sliding on the surface of the star is ezDock, made in the form of 3paired plots - 2 concave with a curvature corresponding to the arc of the Cam inner sprocket and located between convex.
FIELD: transport engineering; all-wheel-drive cross-country vehicles.
SUBSTANCE: proposed multipurpose cross-country vehicle has frame, power plant secured on frame along axis of vehicle with displacement into its saloon, all-wheel-drive transmission, independent suspension of all wheels and brake system, all secured on frame. All-wheel-drive transmission has drive axles with self-locking differentials. Independent suspension is torsion-bar type on transverse arms. With suspension in static position, lower transverse arms are located higher than frame plane. Brake system is provided with sealed brake mechanisms. Said brake mechanisms are arranged in sealed housing closed by covers with sealing rings.
EFFECT: increased cross-country capacity and stability of vehicle on rough terrain, protection of working surfaces of brake mechanisms from getting of water and road mud.
FIELD: machine building.
SUBSTANCE: locked differential includes central annular cam element (130) freely rotating and supported inside central annular drive element (116) without using any locking device, such as a stop ring. Central cam element (130) is supported in place in longitudinal direction owing to displacement forces applied to elements (122, 124) of the coupling, which are located on opposite sides of central drive element by means of cylindrical compression springs concentrically located on outer side relative to side gears (118, 120) respectively and by means of support rings (132, 134) that are connected to the coupling elements. Central cam element (130) and central drive element (116) have external and internal adjacent peripheral surfaces respectively that are smooth, solid and continuous. Support rings (132, 134) are connected so that they can be turned at their far ends with the coupling elements by means of one-piece annular external ribs (132a, 134a) that are continued inside the corresponding grooves continued in bored surfaces of walls.
EFFECT: invention allows simplifying design and assembly of a differential and reducing its cost.
4 cl, 18 dwg
FIELD: transport engineering.
SUBSTANCE: proposed differential has case 1 which accommodates coaxially installed axle-shafts of drive wheels, cages 7, 8, driven bushings 3, 4 with splines for connection with drive wheel axle-shafts coaxially installed in cages. Case 1 is made in form of cylindrical bushing on inner surface of which longitudinal wedging cavities for rollers 5, 6 are made. Each roller in each cavity can move along driven bushing from one wedging position into the other. Cages 7, 8 are made in form of hollow cylinders with rectangular holes on surface whose number corresponds to number of longitudinal wedging cavities for rollers. On end face surface of cages 7, 8 at least one slot is made on end face surface of one cage and hole with rigidly fitted-in pin on end face surface of other cage. Pin of one cage gets into slot of other cage forming movable link for angular displacement of cages in relatively opposite directions.
EFFECT: improved reliability, roadability and safety of vehicle.
FIELD: mechanical engineering.
SUBSTANCE: differential comprises housing (1), cross-shaped or straight shaft (5) of satellites, a number of satellites (4), and gear pair (2) of semiaxles. When gears (2) of semiaxles cooperate with satellites (4) the gear ratio changes at least in two stages. The number of stages is multiple to the number of teeth in satellites (4) and gears (2) of the semiaxles.
EFFECT: expanded functional capabilities.
16 cl, 5 dwg, 1 tbl
FIELD: transport engineering; bicycles.
SUBSTANCE: invention is designed for devices automatically changing gear ratio without interruption of power flow. Proposed drive contains two differentials. Force sensor 5 is installed between input shaft 8 and common input of both differentials, namely power differential 1 and regulating second differential 2. Said force sensor 5 cuts in braking device 4 at rise of load, said braking devices is idling at direct drive and is connected with regulating input of second differential 2. As a result, output gear 21 of second differential 2 starts rotating and self-braking drive 3 releases carrier 25 of power differential 1. Proposed drive automatically changes over from direct drive to drive with changed gear ratio. Moment of changing over can be regulated by tensioner 6 of spring 19 of force sensor.
EFFECT: facilitated selection of step-down gear in wide range of gear ration depending on individual capabilities of user.
FIELD: mechanical engineering.
SUBSTANCE: invention relates to methods of control of differential locking of multidrive wheeled vehicles and it can be used at designing of systems to control tractive forces of driving wheels of multidrive vehicles and carrying out investigations of wheeled vehicles. proposed method of control of differential locks comes to locking of differential for definite periods of time at threshold values of mismatching of mechanical parameters of driving wheels intercoupled by said differential and unlocking differential at expiration of definite of time or at achievement of threshold value of steerability index. Unlocking of differentials at achievement of threshold value of steerability index is carried out individually, starting from differential whose locking has greater effect on steerability of wheeled vehicle.
EFFECT: enlarged range of control of traction forces on driving wheels to increase cross-country capacity and traction and speed properties at provision of required steerability of multidrive wheeled vehicles.
FIELD: transport engineering.
SUBSTANCE: invention can be used to increase cross-country capacity and stability of vehicle at braking. Proposed differential lock mechanism contains locking device in form of friction mechanism including two members 1 and 2. Friction mechanism consists of pack of friction disk 3 and steel disks 4, two control pistons 7, air feed head 8 with union 9. Members 1, 2 of clocking device are connected by pairs of gears 10, 11, 12, 13 with axle-shafts 14, 15. Device is furnished additionally with air fed control system consisting of angular velocity pickups 16, 17, electronic control unit 18, electromagnetic control valve 19, relief valve 20, change-over switch 21, connecting air lines and electric wires.
EFFECT: increased cross-country capacity and stability of vehicle.
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: 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.
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
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