Method and device for vehicle differential brake

FIELD: machine building.

SUBSTANCE: group of inventions relates to automotive industry, in particular, to vehicles transmissions. Method of vehicle transmission using for control over drive torque distribution on two drive wheels by means of differential gear. Coupling is supplied with preparatory hydraulic pressure, having value, providing coupling discs actuation in contact with each other. Preparatory hydraulic pressure is supplied in cases, in which coupling control effect fast prediction is possible. Vehicle transmission comprises differential drive for torque distribution on two drive wheels and differential brake with hydraulically controlled coupling with increased internal resistance. Additionally there is response system for control over said hydraulic pressure supply to coupling.

EFFECT: enabling reduced differential brake response time to motion conditions change due to supply of small preparatory hydraulic pressure to coupling.

2 cl, 3 dwg

 



 

Same patents:

FIELD: transport.

SUBSTANCE: invention relates to automotive industry and can be used for development of transmissions for wheels vehicles of high cross-country capacity. Transmission with drive axles of portal type and stiff kinematics of all four half-axles and gearbox secondary shaft, wheel misaligned reduction gearboxes with single-row output planetary mechanisms with drive crown gears engaged with half-axles while sun gears are engaged with hydraulic machines shafts, hydraulic machine housings being rigidly coupled with those of wheel reduction gears. Working chambers of every drive axle are communicated via reverse slide valve with high-and low-pressure lines provided with boost system. High-pressure line incorporates fluid interlocking throttling mechanisms with stepwise drag variation. Note here that self-locking of ACS at vehicle turn depends on turn angle, front controlled wheel rpm and torque differences which allows actuation of one of said two self-locking modes or complete interlocking of interwheel differential gearing. Said lines include selective valves communicating pressure chambers of higher-load hydraulic machines of front and rear wheels with interaxle high-pressure line with electrically-controlled fluid two-mode locking mechanism.

EFFECT: higher mobility, cross-country capacity and efficiency.

11 cl, 13 dwg

FIELD: electricity.

SUBSTANCE: invention is related to electronically-controllable locking differentials. Electronically-controllable locking differential comprises an electromagnetic coil and control system. The control system comprises a module under instrument panel of an automobile and a circuit interacting electrically with the above module. The circuit comprises a switch and a fixing component. The circuit is off when power supply of the control system is off and is in stand-by mode when power supply is supplied to the control system. When the switch is switched on and retained in this position current passes through the above circuit in order to actuate the fixing component, at that differential is actuated. The fixing component includes a double-pole two-position control relay that contains the first switch, the second switch and a coil. When the switch is switched on and retained in this position current passes through the above circuit thus actuating relay, the second switch is closed and differential is actuated.

EFFECT: simplification of design and improvement of reliability is attained.

18 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: invention is related to electronically-controllable locking differentials. Differential comprises magnetic coil (50) and control system based on wire harness for logic control of the differential operation; the system comprises a circuit (56). The circuit contains a locking switch (62), which is coupled electrically to the first power supply source and designed to lock power supply of the differential. Double-pole double-throw control relay (72) coupled electrically to the locking switch (62) comprises the first switch (74), the second switch (76) and a coil (78). The second switch (76) is designed to "overjump" the locking switch (62). The circuit is deenergised when power is not supplied to the wire harness and is in standby mode when power is supplied to the wire harness. When the locking switch (62) is activated current passes from the initial point through the circuit in order to activate the relay (72), at that the first switch (74) is closed to excite the differential and the second switch (76) is closed so that current "overjumps" the locking switch (62) and the differential becomes activated.

EFFECT: higher reliability of a device is reached.

20 cl, 3 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Vehicle comprises set of wheels mounted at the frame. Every wheel is engaged with engine to drive the vehicle. Self-locking differential gear is supported by the frame. First and second half-axles are engaged with said self-locking differential gear. First half-axle supports first wheel of aforesaid set. Second half-axle supports second wheel of aforesaid set. Brake is engaged with self-locking differential gear. Said brake selectively applies braking force to said first and second wheels via one part of self-locking differential gear to reduce vehicle speed. When said brake is engaged, control unit selectively increases engagement of self-locking differential gear in response to difference in rpm of said first and second wheels exceeding the first preset rpm. Invention covers also the method of vehicle control.

EFFECT: better braking, minimised and well-centered vehicle weight.

15 cl, 18 dwg

FIELD: transport.

SUBSTANCE: invention relates to vehicles with all-wheel drive. The truck comprises frame, body, strain gauge, driveline including interaxle differential. Interaxle differential comprises two planetary gear sets. The planetary gear sets are switched by gear clutch. The gear clutch is hydraulically driven by piston. The piston is located in two-section working chamber. The working chamber communicates with working fluid pressure source through hydraulic on/off control valve. Hydraulic control valve is operated by electric magnet. The electric magnet by one its electric circuit is connected via threshold element to strain gauge, and by its other electric circuit - to transmission low gear actuation sensor. In the electric circuit connecting electric magnet with strain gauge, self-reset circuit-opening relay contact. The contact is connected to transmission high gear actuation sensor.

EFFECT: better drivability and flotation of vehicle.

2 cl, 2 dwg

FIELD: transport.

SUBSTANCE: invention relates to vehicles with all-wheel drive. The truck comprises cabin, cargo body, strain gauge, transmission to transfer torque moment from engine to front and rear driving axles. In the kinematic chain of driveline, transmission with clutch and transfer gear with interaxle differential is located. Interaxle differential comprises two planetary gear sets. The planetary gear sets are switched by gear clutch. The gear clutch is driven by piston. The piston is located in two-section chamber communicating with working fluid pressure source via four-way hydraulic on/off control valve. Hydraulic control valve is operated by electric magnet. The electric magnet is connected to strain gauge via threshold element. The strain gauge responds to cargo presence in truck body.

EFFECT: better drivability and flotation of vehicle.

3 cl, 2 dwg

FIELD: transport.

SUBSTANCE: invention relates to vehicles with all-wheel drive. All-wheel drive truck includes cabin, cargo body, transmission to transfer torque moment from engine to front and rear driving axles. In the kinematic chain of transmission, there is transfer gear with interaxle differential. Interaxle differential comprises two planetary gear sets. The planetary gear sets are switched by gear clutch. The gear clutch is driven by piston. The piston is located in two-section chamber communicating with working fluid pressure source via four-way on/off control valve. The control valve is operated by electric magnet. The electric magnet is connected to step switch. The step switch is driven from rear driving axle beam.

EFFECT: better drivability and flotation of vehicle.

3 cl, 2 dwg

FIELD: automotive industry.

SUBSTANCE: proposed device comprises differential mechanism, driving force regulator and differential limiter. Differential mechanism can distribute driving forces generated by vehicle drive for LH and RH wheels to allow differential torque on said LH and RH wheels. Driving force regulator regulates each distributed driving force. Differential limiter limits torque difference between LH and RH wheels by applying limiting torque to differential mechanism.

EFFECT: higher stability.

4 cl, 9 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: 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.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to transport engineering and can be used in cross-country vehicles. Self-locking differential with magnetic liquid includes two cups of differential compensating case, two differential axles, two differential gears, four pinion gears. The differential gears consist of gear with friction pads and gears with magnetic liquid, where gear with friction pads is made with external and internal toothing, the external toothing has the same profile and teeth number as gear with magnetic liquid, herewith, gear with magnetic liquid has axial offset from axis of differential axles in unlocked state.

EFFECT: perfected design.

4 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building, specifically to differential gears of wheeled tractor front driving axles, as well as can be used as differential for wheeled vehicles and other transport means. Freewheel self-locking differential represents double-acting coupled ratchet free-wheel clutch installed on bearings in axle body. It contains differential housing with driven gear (3) of central gear group. In the borings of the housing, ratchets (5) and spring-loaded axes (7) with catches (8) installed on them are mounted. The axes have on their each butt end one main eccentric projection (A), interacting with stationary disc (10) installed in axle body, and one additional projection (B) located diametrically opposite to the main projection. In the axle body there is additional disc (12) installed being able to move in axial direction by means of guides (11) and to act on additional projections.

EFFECT: invention has possibility of forced locking differential ratchet mechanisms and switching on front wheels during braking.

5 dwg

FIELD: transport.

SUBSTANCE: differential mechanism comprises crankcase (1), main gear, simple differential gear, planetary gearbox and friction control clutch. Main gear consists of drive gear (2) and driven gear (3). Driven gear (3) is composed by planet carrier (4) wherein fitted is said simple differential including planet gears (6, 7). Every planet gear (6, 7) is engaged via shaft (15) with planet gear (9) engaged with epicycle (16) and sun gear (8). Every friction control clutch (10, 11) is composed by the set of clutches. Inner drive drum (13) of friction clutch (10) is rigidly engaged with epicycle (16). Inner drive drum (12) of friction clutch (11) is engaged via hollow shaft (17) with sun gear (8). Every outer drum (14) is composed of a unit shared by gears of every planetary gearbox and fitted on fight or left output shaft of differential mechanism.

EFFECT: redistribution of torques at output shafts ratio defined by vehicle running conditions.

4 cl, 2 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Vehicle comprises set of wheels mounted at the frame. Every wheel is engaged with engine to drive the vehicle. Self-locking differential gear is supported by the frame. First and second half-axles are engaged with said self-locking differential gear. First half-axle supports first wheel of aforesaid set. Second half-axle supports second wheel of aforesaid set. Brake is engaged with self-locking differential gear. Said brake selectively applies braking force to said first and second wheels via one part of self-locking differential gear to reduce vehicle speed. When said brake is engaged, control unit selectively increases engagement of self-locking differential gear in response to difference in rpm of said first and second wheels exceeding the first preset rpm. Invention covers also the method of vehicle control.

EFFECT: better braking, minimised and well-centered vehicle weight.

15 cl, 18 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building and may be used in transport facilities. Proposed main gear comprises drive conical gear 1 running in conical bearings 2, 3 fitted in sleeve 4. Sleeve 4 is elongated radially and secured in reduction gear case 5 by bolts 6 via shims 7. Driven spur gear 8 is fitted on splined shank of gear 1. Master differential has solid cup 10 accommodating differential pinions 11 running on spider 12 splined onto drive shaft 13. Half-axle gears 14, 15 are engaged with differential pinions 11. Gear 14 is made integral with drive sour gear 16. Gear 15 runs in conical bearing 17 fitted in elongated part of sleeve 4.

EFFECT: simplified assembly of main gear.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to wheeled vehicles. Proposed final drive comprises reduction gear case 1 and cover 2 with crown gear wheel 3 engaged via threaded elements 4. Case element axial zone has rolling bearing seats. Drive shaft runs in said bearings. Said drive shaft is made up of input shaft 5 and output shaft 6 whereon flange 9 is splined. Sun gear 12 is mounted at input shaft center while forward and underdrive gear throw-in clutch 13 with synchro unit 14 is fitted nearby output shaft end. Internal end of output shaft 6 supports three-pin pinion frame 18, its pins supporting pinions 18 running in bearings 17. Underdrive gear throw-in clutch 19 with synchro unit 20 is fitted at output shaft center.

EFFECT: longer life of planetary reduction gear, higher traction on drive wheels.

4 cl, 2 dwg

Differential // 2429143

FIELD: machine building.

SUBSTANCE: differential consists of power elements, of devices for locking and unlocking kinematic link between power elements and of lock members. As power elements there are used worms and worm gears forming self-braking worm pairs. As devices for locking and unlocking kinematic link between power element there are used controlled gear drives of worms from output shafts. The gear drives have similar gear ratios with worm pairs.

EFFECT: raised reliability of differential.

2 dwg

FIELD: machine building.

SUBSTANCE: converter of gear ratio of transmission consists of planetary differential with driving carrier (2) and two central gears (5, 6) different in diametre. One of central gears (5) transfers rotation to output shaft (7). Second central gear (6) transfers rotation via reducer (8) shifting direction of rotation and friction clutch (9), driven disk of which is rigidly coupled with the output shaft, also to output shaft (7). Both central gears rotate the output shaft in one direction, but have different speed of rotation. Difference of rotation speed is compensated with the friction clutch also distributing load between arms of the differential.

EFFECT: decreased losses and simplification of design.

3 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: invention relates to machine building field, particularly to control methods of differentials' blocking of multi-driving wheeled machines. Control method of differential' blocking of multi-driving wheeled machines consists in interlocking of interaxle differentials for particular intervals at achievement of threshold valuation of miscoordinations of kinematic parametres of connected by them driving wheels and deblocking of differentials. Additionally deblocking of interaxle differentials is implemented at achievement of miscoordinations of kinematic parametres of driving wheels lower the values, defined by formula.

EFFECT: there is achieved effectiveness increase of running system and tractive properties of wheeled machine.

6 dwg

FIELD: machine building.

SUBSTANCE: invention relates to automobile production field, and also transportation equipment. Controllable interwheel (interaxial) differential contains casing (1), in which there are located input shaft (2) with toothed wheel (3), intermediate shaft (4), output shafts (7,8), controlling drive, shaft (5) of controlling drive with toothed wheel (6), lock-up clutch, shaft (9) of blocking mechanism with bevel gear (10), installed on inetrmidiate shaft (4) follower gear (11) of main drive and transmission toothed wheels (12, 13), connected to follower gear of main gear, two symmetric cycloidal reducer (CR), drive pinions (14, 15) of which are implemented at one with driving heliac wheels of these CR and are installed on controlling shafts. Intermediate bodies of revolution consists of duplex in pairs satellites (26, 27), which are installed on eccentrics (22, 23) controlling shafts and connected to each other by means of conical enveloping toothed wheels (24, 25), blocking toothed wheel and control drive (8). In the second version of implementation of controllable inter-wheel (inter-axial) differential it is used one control shaft, on which there are installed stages of front and back CR.

EFFECT: invention provides improvement of passability and steerability of vehicle.

3 cl, 2 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

Up!