All-wheel drive truck

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

 

The technical solution relates to wheeled vehicles. It concerns a two-axle truck with all-wheel drive capable of moving in all road conditions.

In the transmission of trucks with all-wheel drive, used transfer case with a center differential that contains one or more planetary gear sets, which are shown, for example, in patentsâ„–â„–2026208, 2093374, 2192972, 2236958, issued in the Russian Federation. As a close analogue passed a truck with all-wheel drive, shown in issued U.S. patent No. 4280583, NCI 180/250, IPC B60K 17/34. This car includes a frame for mounting on her body, the transmission for the transmission of rotary torque from the engine to the front and rear driving axles. In the kinematic chain of transmission are transmission with clutch and transfer case with a center differential that contains the planetary series, distributing in certain proportions turning points transmitted to the driven axles. However, in this truck, the ratio of the turning points of coming to the front and rear driving axles, remains unchanged during movement of the vehicle with cargo in the back, and during its movement without load, which affects the car's handling, increase tire wear is on wheels.

Problem to be solved is to improve the manageability and road freight car with all-wheel drive operation in various conditions, reducing tire wear his wheels by providing timely redistribution of load on the wheels of the vehicle when the stowage of cargo in the vehicle and when it is unloaded.

The solution provided by the fact that in a truck with all-wheel drive containing frame body for carriage mounted on the frame, a strain sensor, which responds to the presence of cargo in the vehicle, the transmission for the transmission of rotary torque from the engine to the front and rear driving axles, gearbox with clutch and transfer case with a center differential, arranged in the kinematic chain of transmission, center differential includes two planetary range, switchable gear coupling having a drive piston located in a two-chamber communicated with a source of pressure fluid through a four way two-position hydraulic valve having control of an electromagnet connected electrical circuit through the threshold element of the said strain sensor that responds to the presence of cargo in the vehicle.

Due to the use of the cation in the transmission of the truck with all-wheel drive transfer case with a center differential, contains two planetary series, switched automatically toothed coupling with the stowage of cargo in body during removal of the cargo body to signal to the drive clutch from the hydraulic distributor having a control electromagnet connected electrical circuit through the threshold element to the strain sensor, which responds to the presence of cargo in the vehicle, improving the controllability of the car due to the rational distribution of load on the wheels when empty and when loaded the body, reduces tyre wear and, in addition, facilitates the maintenance of the vehicle as the load on the wheels is done automatically, without requiring the intervention of the driver of the car. Thus receipt of the signal from the strain gauge through the threshold element eliminates the redistribution of turning points on the leading wheels with lightweight cargo that is not adversely affected handling.

Strain gauge, which is equipped with a truck, is located between the body and the frame under the front section of the body, and the rear section of the body connected to the frame hinge. This strain gauge, which is equipped with a truck, can also be used and the weight of the load transported by the vehicle to the consumer.

Car Snab the Yong tow device for transportation of the trailer, with two-wire pneumatic drive system brakes. From the supply line of the air system has an actuator switch located in the electrical circuit connecting the electromagnet to control the hydraulic valve to a source of electrical current in a parallel electrical circuit, where the load cell and the threshold element.

The figure 1 shows the truck with all-wheel drive.

The figure 2 shows the transfer case of the vehicle.

Truck presented on figure 1, includes a frame 1 on which the front cabin is 2, and it has a body 3, intended for the carriage of cargo. Between the cab and the body is installed on the frame of the engine 4. The vehicle includes a transmission for transmitting rotary torque from the engine to the front leading to the bridge 5 and the rear to the leading axle 6 with the elastic suspension on the frame 1. In the kinematic chain transmissions are manual transmission 7 with clutch, transfer case 8, is equipped with a center differential and drive shafts 9 for the connection of shafts of the transfer case with the shafts of the gearbox and axles.

The transfer case includes a housing 10 (figure 2), which houses the driving shaft 11 and driven shaft 12, connected with the battle gear. With the driven shaft 12 is rigidly connected drove 13 center differential with two switchable planetary series. On the driver 13 are identical satellites 14 and 15, which have toothed engagement with each other, with the crown gear 16 and sun gear 17 and 18. The sun gear 17 of the first planetary series has a splined connection with the output shaft 19 of the drive front drive axle 5 of the vehicle. The sun gear 18 of the second planetary series is installed on the output shaft 20 of the rear driving axle 6 with the possibility of free rotation on his smooth neck. To change the kinematic relations in inter-axle differential after stowage in the body and thus redistribution of turning points on the shafts 19 and 20 of the drive axles, the transfer case comprises a gear coupling 21 having a splined connection with the output shaft 20. The gear coupling 21 is made with the outer and inner toothed crowns for alternate communication with the output shaft 20 or the sun gear 18 with the hub of the outer ring gear or crown gear 16 with the hub of the internal gear. The gear coupling 21 is driven by a piston 22, to which it is connected by a leash through the bearing. The piston 22 is located in the housing 10 transfer case Duhs clonney the working chamber 23, reported through the hydroline 24 and 25 with a source of pressure fluid, in particular a pump 26 through a four way two-position hydraulic valve 27. The valve 27 has a control electromagnet 28 connected electrical circuit 29 via the amplifier, the threshold element 30 and the diode to the strain sensor 31, which responds to the presence of cargo in the vehicle. Load strain gauge 31 is located between the body 3 and the frame 1 under the front section of the body, and the rear section of the body 3 is connected with the frame hinge. In the absence of an electrical signal from the strain sensor 31, that is, when no electric current in the electric circuit 29 connected to the electromagnet 28, the movable element of the distributor 27 takes such a position, at which the working fluid flows from him under pressure in the rear section of the working chamber 23 behind the piston 22, setting it in a position in which a floating piston type clutch 21 is engaged with a ring gear sun gear 18. In this case, between the shafts 19 and 20 drive the front and rear axles is set to the lowest power ratio, i.e. the least regard to turning points on these shafts. When an electrical signal from the threshold element 30 to the electronic is romagnieu 28 movable element of the valve 27 under the action of the electromagnet takes a different position, in which the working fluid from the distributor 27 is supplied under pressure into the front section of the working chamber 23 before the piston 22, setting it in a different position, in which a floating piston type clutch 21 is engaged with the crown gear 16. Then between the shafts 19 and 20 of the drive axles is set to the highest power ratio at which the magnitude of the turning moment on the shaft 20 of the rear driving axle 6 is considerably greater than the turning moment on the shaft 19 of the drive front drive axle 5.

The car is equipped with a towing device 32 for carrying trailer having a two-wire pneumatic drive system brakes. From the supply line 33 this pneumatic system from its site located between the valve 34 with manual control and the supply cylinder 35, the membrane actuator is controlled by a switch 36. Contact with the momentary switch 36 is in an electrical circuit 37 that connects the electromagnet 28, the control valve 27 to a source of electrical current in a parallel electrical circuit 29, which are strain gauge 31 and the threshold element 30.

When driving the rotary torque from the engine through the gearbox 7 is supplied to the drive shaft 11 of the transfer case 8 and the via gear is transmitted to the follower shaft 12, torque drove 13 center differential that distributes the turning points between the front 5 and rear 6 transaxles depending on the position occupied by the movable element of the valve 27. When empty the body of the distributor 27 directs the working fluid from the pump 26 in the rear section of the working chamber 23, by setting the piston 22 and an associated gear clutch 21 in a position in which the toothed clutch connects the sun gear 18 with the shaft 20 of the rear driving axle 6. Then the turning point comes from the led 13 to the output shafts 19 and 20 of the drive axles through both satellites 14 and 15 and through both of the sun gears 17 and 18. In this case, the turning point is distributed equally between the wheel axles. When laying in the back of heavy cargo with a weight in excess of half the capacity of the vehicle, an electrical signal from the strain sensor 31 through the threshold element 30 is supplied to the electromagnet 28, which moves the movable element, that is, the slide valve of the distributor 27 to another position in which the front section of the working chamber 23 communicates with the pump 26 and its rear section, located behind the piston 22, is communicated with the drain. Under the action of pressure in the front section of the working chamber, the piston 22 takes a claw coupling from the sun gear 18, severing it with the shaft 20, and coedine the shaft 20 of the gear coupling 21 of the crown gear 16. Then the torque from the carrier 13 is transmitted to the output shaft 19 of the front axle drive is still via the satellite 14 and the sun gear 17 and the output shaft 20 of the rear drive axle turning moment is transmitted via the satellite 14, through the crown gear 16 and the gear coupling 21. After this torque on the shaft 20 of the rear driving axle 6, on which is loaded the body, is significantly greater than on the shaft 19 of the drive front drive axle 5. After transportation and unloading of cargo from the body stops the flow of an electrical signal from the strain gauge 31 to the solenoid 28 of the control valve 27, and then the spring-loaded spool valve 27 is returned to its original first position in which the front section of the working chamber 23 is communicated with the drain, and the rear section, located behind the piston 22, it is reported through hydroline 25 by pump 26. Under the action of pressure fluid in the rear section of the working chamber 23 of the piston 22 moves to the sun gear 18 and connects it to the output shaft 20 of the rear drive axle. Then when moving the empty car to the place of loading in its body cargo turning point is distributed equally between the driving axles, the wheels are on their bus in this case, when the empty body n the load is approximately the same.

When agricultural work in the transport of lightweight cargo, such as hay or straw, the signal from the strain sensor 31 may be weak, unable to pass the threshold element 30, which is at a light load and is not required. However, when using the trailer cargo is additional loading wheel rear drive axle that should be taken into account and therefore to increase the turning moment applied to the rear leading to the bridge. To increase the turning moment on the rear master bridge after joining the car trailer is supplied compressed air from the supply line 33 pneumatic drive system brakes of the trailer to the Executive element of the actuator of the switch 36. With the closure of the switch contacts 36 electric current from its source supplied to the solenoid 28 of the control valve 27, which directs the working fluid under pressure in the section of the working chamber 23 located in front of the piston 22. The piston 22 takes the gear coupling 21 on the sun gear 18 and enters it into engagement with the crown gear 16. After that there is redistribution of turning points between the front and rear driving axles, causing the rear to the leading axle 6 when the vehicle arrives more rotary m is the moment, and the front of the leading axle 5 lower turning point. After the cessation of transportation of lightweight cargo and disconnection of the trailer from the vehicle is stopping the supply of compressed air through the valve 34 to supply a connection head 35 and the opening of the connecting heads of the vehicle and trailer. With the release of compressed air from the supply line 33, the contacts of switch 36 will open and power to the electromagnet 28 from the source of current is interrupted. The spool valve 27 under the action of the return spring returns to its original position at which the gear coupling 21 under the action of the piston 22 is detached from the crown gear 16 and is engaged with a sun gear 18. After that turning points are shared equally between driving axles in accordance with the burdens on their wheels when empty body.

Due to the transmission of the truck with all-wheel drive transfer case with a center differential that contains two planetary range, switchable when loading cargo into the truck and unloading the signal from the set under the body strain gauge, which responds to the presence of cargo in the back, as well as the signal generated during the joining of the trailer, provided timely automatic pererasti the bookmark load on the wheel axles, resulting in easier maintenance of the car improves its maneuverability and controllability when driving in different road conditions, reduced tyre wear.

1. The truck with all-wheel drive containing frame body for carriage mounted on the frame, a strain sensor, which responds to the presence of cargo in the back, the transmission for the transmission of rotary torque from the engine to the front and rear driving axles, in the kinematic chain of transmission are transmission with clutch and transfer case with a center differential, center differential includes two planetary range, switchable gear coupling having a drive piston located in a two-chamber communicated with a source of pressure fluid through a four way two-position hydraulic valve having a control electromagnet connected electrical circuit across the threshold element of the said strain sensor that responds to the presence of cargo in the vehicle.

2. Truck according to claim 1, characterized in that the strain gauge is located between the body and the frame under the front section of the body, and the rear section of the body connected to the frame hinge.

3. Truck according to claim 2, ex is different, however, he is equipped with a towing device for transportation of the trailer with two-wire pneumatic drive system brakes, from the supply line of the air system has an actuator switch located in the electrical circuit connecting the electromagnet to control the hydraulic valve to a source of electrical current in a parallel electrical circuit, where the load cell and the threshold element.



 

Same patents:

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.

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EFFECT: better drivability and flotation of vehicle.

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FIELD: transport engineering; bicycles.

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FIELD: transport.

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FIELD: transport.

SUBSTANCE: invention relates to device and method of locking interaxle differential of articulated transport facility. Device of locking and unlocking interaxle differential 10 is arranged between front wheel axle 4 and rear wheel axle 5 of articulated transport facility 1. Said articulated transport facility comprises front element 2 and rear element 3 arranged to turn about steering drive 6 arranged there between, branch box 9 and differential 10 arranged between first shaft 11 and second shaft 12. Note here that articulated transport facility a comprises also appliances 25a to measure steering control angle v formed between front element 2 and rear element 3. Appliance 25a locks brake 20 of lengthwise differential 10 when appliance 25 detects that steering control angle v is smaller than preset angle v1.

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FIELD: transport.

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EFFECT: higher safety.

4 cl, 2 dwg

FIELD: transport.

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EFFECT: increased reliability of transfer gear and its functionality enhancement.

2 cl, 1 dwg

FIELD: transport engineering.

SUBSTANCE: invention relates to drives of all-wheel-drive cross-country vehicles designed for riding along roads and off-road. Proposed two-step planetary transfer case contains upper planetary reduction gear providing two speeds of transfer case, intermediate shaft with gear 5 and lower planetary reduction gear being essentially differential drive for rear and front driving axles. Driving member of upper planetary reduction gear is crown gear 9 stationary connected with drive shaft 8, driven member is carrier 13 and controlled member is central gear 11. Gears of upper planetary reduction gear, driving gear 4, intermediate gear 5 and driven gear 6 and gears of lower differential mechanism are arranged in one row one over the other.

EFFECT: reduced overall dimensions adapted for mounting transfer case on vehicles.

1 dwg

FIELD: transport engineering.

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EFFECT: increased cross-country capacity, optimization of distributions of longitudinal pushing forces developed by different types of propulsion devices, increased service life of tracks owing to adjustment of kinematic mismatch of different type propulsion devices.

1 dwg

FIELD: transport engineering; transfer cases.

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EFFECT: simplified design of transfer case gearshift mechanism wire prevention of engagement of two gears at a time.

4 cl, 4 dwg

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