The differential lock of the vehicle
The invention relates to mechanical engineering and can be used in vehicles terrain. In the blocking device and the governing body of the locking mechanism of the differential elements of the Parking brake system: lever, ratchet mechanism, a flexible rod, brake pads, brake drums. The control lever is kinematically connected with a ratchet and rigidly connected to the axle. On the axis through the spline set coupling coupling for axial movement and the introduction of an electromagnet. Coupling coupling associated with the slots of the rotary levers. Swing arms are connected by a flexible shaft with the brake pads, kinematically connected with the brake drums. Between the clutch coupling and the electromagnet installed recoil. An electromagnet mounted rigidly on the body of the vehicle and electrically connected to the switch, the first output of which is connected to the first input and the second output to the second input of the electromagnet. The technical result is to simplify the design. 2 Il.
The invention relates to mechanical engineering and can be and the increased friction of the GAZ-66 (technical passport of the car GAZ-66), designed to block the drive wheels of the drive axle at slipping through the use of the friction torque between pausetime gears, compensating the difference between the torque axes arising from the difference of the torques of the clutch wheel and the road surface. The disadvantage of this differential is that because of the inevitable cross-axle kinematic misalignment of the actuator is blocked in almost the entire period of movement of the machine, resulting in unproductive expenditure of energy, wear running gear and drive. Worse handling and stability of the vehicle when driving on asphalt. This is due to the fact that at the back the wheel of time several times and it tends to "push" the car out of the turn, increases fuel consumption.
Also known differentials with full lock having a coupling rigidly connecting the (blocking) the housing of the differential and half-shaft gear. The drive coupling may be mechanical, hydraulic, and control of the lock is performed by the driver (locking center differential VAZ-21213, VAZ-2121, Ershov B. C. ed. "Vyscha SHKOLA, Kiev, 1985), after overcoming tradeprof what I otherwise, the tires and the transmission will act to excessive load, and the car will be worse to manage.
The closest to the essential features of the claimed technical solution is the device "a limited-slip differential wheeled vehicles" (Patent RF №2162974, F 16 N 48/30, 10.02.01, bull. No. 4) containing a differential gear, a Central wheel which is rigidly connected with the axles of drive wheels, and a locking device which includes coupling sleeve and the governing body. The governing body consists of sensors of angular velocity and the measurement scheme of the private branch of the angular velocity and comparing it with a preset critical value, which is calculated by the formula. The output of the said circuit through the rectifier is connected to the servo. Leading coupling coupling coupling is connected with the planet carrier of the differential gear. Her slave coupling mounted on the splines of one of the axes with the possibility of axial movement and kinematically connected with the servo. The disadvantage of this device is the design complexity, since the structure of the device includes a measurement scheme private from division angular velocity and compare it with the specified critical has low performance. The disadvantages of this self-locking differential wheeled vehicles should also be noted that the differential lock is in the discrete mode, the duration is determined by the parameters of the time relay. If the difficult part is not over, it starts slipping, then the signals from the speed sensors include a differential lock again. This process occurs before the end of a difficult road. This differential reduces the efficiency of the lock, which has a negative effect on the level terrain vehicle.
The purpose of the invention is to simplify the design, and thus improving performance.
This objective is achieved in that the blocking device and the governing body of the used elements of the Parking brake system including a control lever Parking brake ratchet mechanism, a flexible rod, brake pads, rigidly United with pausetime the differential gears, and a control lever of the Parking brake system is kinematically connected with the ratchet can be locked and rigidly connected to the axle, the mouth is zmoznostjo axial movement and the introduction of an electromagnet coupling clutch, kinematically associated with the slots of the rotary levers, which are connected by a flexible shaft with the brake pads, kinematically connected with the brake drums, with installed recoil between the coupling sleeves and an electromagnet mounted rigidly on the body of the vehicle and electrically connected to the switch, the first output of which is connected to the first input and the second output to the second input of the electromagnet
In Fig.1 schematically shows a differential lock that contains a blocking device containing the brake drum 8, is rigidly connected with the axle 7 and polovoy gear 13, the brake pads 9, United flexible shaft 17 with the pivoting arm 20 of Fig.2 is a circuit diagram of the switch.
The governing body holds the lever 27 of the control of the Parking brake system is kinematically associated with the ratchet mechanism (gear sector 24, doggy 25, traction control dog 26) can be locked and rigidly connected with the axis 28 that is installed on the supports 19 for rotation on the axis 28 is made spline connection and installed with the possibility of axial movement and carrying an electromagnet coupling clutch 21, kinematically ftoi 21 and the electromagnet 22, mounted rigidly on the body of the vehicle.
The differential lock works as follows.
Situation 1. Maneuvering without slippage.
The switch is n neutral position, the electric current in the winding of the electromagnet 22 is missing. Coupling coupling 21 under the influence of return spring 23 are in engagement with the rotary lever 20, connecting it with the spline with the axis 28.
When the lever 27 control Parking brake its rotation through the axis 28, the coupling of the coupling 21, the swing arms 20, flexible rod 17 is transmitted to the brake pads 9, the differential lock while running manual brakes.
Situation 2. Complex road traffic conditions.
Skidding, stalling for example the left drive wheel. The switch is placed in the corresponding position, which is signaled by the indicator lamp on the coil of the electromagnet 22 to feed current to the electromagnet 22, overcoming the force of the return spring 23, drawing the coupling sleeve 21, releasing the swivel arm 20 of the right wheel. The force of the lever 27 of the control of the Parking braking system is only the brake pads 9 of the left wheel, which createroot. Thus the amount of torque transmitted from the main transmission through the differential gear at the back right wheel is increased, improving the maneuverability of the vehicle.
Take into account that for a symmetric differential Tob==1,
where Kb- coefficient lock
M1- torque at the back wheel,
M2- torque on the runner wheel.
For example, when Kb=3 the point at the back wheel (not stalled) will be 3 times more than stalled (runner).
Indeed, the claimed differential lock compared to the prototype simpler, since it does not contain coupling clutch differential measurement scheme private from division angular velocities and comparing it with a preset critical value, the amplifier, which are complex electronic devices. The locking mechanism locks the differential for the entire period of passage of difficult section of the road, not in discrete mode, as is the case in the prototype, so the efficiency of the locking mechanism above. All the devices included in the locking mechanism, are widely used Sogno for sale on stationary process equipment.
The differential lock of a vehicle, containing a blocking device, the governing body, characterized in that the blocking device and the governing body of the used elements of the Parking brake system including a control lever Parking brake ratchet mechanism, a flexible rod, brake pads, brake drums, rigidly United with pausetime the differential gears, and a control lever of the Parking brake system is kinematically connected with the ratchet can be locked and rigidly connected to the axle, mounted on bearings for rotation, while on an axis through the spline connection is established with the possibility of axial movement and the introduction of an electromagnet coupling clutch, kinematically associated with the slots of the rotary levers, which are connected by a flexible shaft with the brake pads, kinematically connected with the brake drums, with return spring installed between the clutch coupling and an electromagnet mounted rigidly on the body of the vehicle and electrically connected to the switch, the first output of which is connected with p
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.
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.
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.
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: machine building.
SUBSTANCE: improved differential mechanism consists of locking mechanism connected with mechanism (53) of centrifugal load or with lock member interacting with mechanism (53) of centrifugal load to decelerate differential action in differential mechanism.
EFFECT: improved design.
22 cl, 20 dwg
SUBSTANCE: proposed differential comprises differential gearing with central gear wheels rigidly engaged with drive wheel semi-axles 16, 16', locking device including servo drive, coupler with its drive half-coupling 14 rigidly engaged with pinion frame 17 while driven half-coupling 13 is fitted in splines of one of said semi-axles to axially displace thereon and engaged with servo drive. Control member comprises angular speed transducers, measurement and comparison circuit with its output connected to servo drive, hydraulic pumps 3, 3' coupled with semi-axles and, via hydraulic lines, with double-sided hydraulic cylinder 7. Hydraulic cylinder pistons are coupled with spring-loaded rods 8, 8' coupled, in their turn, with control cylinders 9, 9' to shut off in turn said hydraulic lines 11, 11'. Note here that shut0ff hydraulic line communicates with control cylinder 12 of servo drive via check valve 20 and restrictor 21.
EFFECT: simplified automatic locking, faster operation.
SUBSTANCE: lubricant is forced to transmission running gears and clutch increased-friction discs. Clutch discs are engaged by said lubricant under pressure. Valve assembly with slide valve responds to clutch pressure to release portion of said lubricant from clutch discs into lower crankcase and transmission to remove dirt accumulated in clutch discs. Said slide valve is arranged to make lubricant flow only at valve intermediate displacement to minimize whatever pressure drop in transmission and clutch.
EFFECT: higher reliability.
19 cl, 5 dwg
SUBSTANCE: in compliance with first and second versions, proposed drive comprises two motors, reduction gears, one-way and two-way transmission. Every reduction gear consists of three rotary elements. One-way transmission transmits one-way torque from motors to drive axles. Two-way transmission transmits two-way torque from motors to drive axles. One-way and two-way transmissions are arranged at power train section between motors and drive axles. In compliance with second version, one of three rotary elements of one of reduction gears and one of three rotary elements of the other reduction gear are engaged. Proposed vehicle incorporates one of aforesaid drives.
EFFECT: smaller sizes, higher efficiency.
19 cl, 16 dwg
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
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