Truck with front and rear driving wheels

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

 

The invention relates to wheeled vehicles. It concerns the truck with the front and rear wheels are able to move in various 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 patents No. 2093374, 2192972, 2236958 issued in the Russian Federation. As a close analogue passed a truck with the front and rear wheels, shown in issued U.S. patent No. 4280583, 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 wheels, which are the transmission with clutch and transfer case with a center differential that contains the planetary series, distributing in certain proportions turning points transmitted to the wheels. However, in this truck, the ratio of the turning points of coming to the front and rear wheels remains unchanged during movement of the vehicle with cargo in the back, and during its movement without load, which degrades the controllability and maneuverability of the vehicle, increases tyre wear its wheels.

The objective is to improve the replaement and road freight car with front and rear wheels during its operation under various conditions, reducing tyre wear his wheels by providing timely redistribution of load on the wheels of the car.

The solution provided by the fact that the truck with the front and rear wheels includes a 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 wheels, which are the transmission with clutch and transfer case with a center differential that contains two planetary range, switchable gear clutch, hydraulically driven piston located in the two working chamber communicated with a source of pressure fluid through a two-position hydraulic valve controlled by an electromagnet, which one electrical circuit connected across the threshold element of the said strain sensor that responds to the presence of cargo in the back, and another electric circuit connected to the sensor on the lower level in the gearbox. In the electric circuit connecting the solenoid with strain-gauge sensor is tripping latch relay contact connected to the sensor on the higher level in the gearbox.

Mentioned strain gauge supplied with the truck, placed 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 used in the control center differential transfer case, so is e to account for the weight of the cargo, transported by vehicle.

Figure 1 shows the truck with the front and rear wheels.

Figure 2 shows the metering of the truck.

Truck presented in 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 4 to the front wheels 5 and rear wheels 6. In the kinematic chain of transmission are the clutch 7, which is a friction clutch, manual, for example a five-speed gear box 8 metering 9 containing the center differential and driveline 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 gear. With the driven shaft 12 is rigidly connected drove 13 center differential with two switchable planetary series. On the driver 13 are satellites 14 and 15, which have toothed engagement with each other, with the crown gear 16 and sun gear 17 and 18 having the same diameter. The sun gear 17, the first is th planetary series has a splined connection with the shaft 19 of the drive of the front wheels 5 of the vehicle. The sun gear 18 of the second planetary series is installed on the shaft 20 of the drive of the rear wheels 6 with the possibility of free rotation on his smooth neck. To change the kinematic relations in inter-axle differential to redistribute turning points on the shafts 19 and 20, the drive wheels after stowage in the back of the transfer case comprises a gear coupling 21 having a splined connection with the shaft 20 of the drive of the rear wheels 6. The gear coupling 21 is made with the outer and inner toothed crowns for alternate communication with the shaft 20 of the drive of the rear wheels 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 hydraulically actuated from the piston 22, to which it is connected by a leash through the bearing. The piston 22 is located in the housing carrier 13 in the two working chamber 23 is communicated 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 distributor 27, containing a spring-loaded valve has a control electromagnet 28 connected electrical circuit 29 via the amplifier, the threshold element 30 and the diode to the strain sensor 31, reacherous is in the presence of cargo in the vehicle. Another electrical circuit 32, the electromagnet 28 to control the hydraulic valve 27 is connected to the sensor 33 enable lower level in the gearbox 8. In the electric circuit 29, which connects the electromagnet 28 with strain-gauge sensor 31 is a disconnect latch contact 34 of the relay 35 is connected to the sensor 36 enable the highest level in the gearbox. The sensors 33 and 36 contain the contacts connecting the electromagnet 28 to a source of electric current when the circuit of the rods 37, 38, moving the toothed clutch inclusion levels in the gearbox when shifting to another position of the lever 39 of the gear control.

Load strain gauge sensor 31, which is equipped with a truck, is located between the body 3 and the frame 1 under the front section of the body. The rear section of the body 3 is connected with the frame hinge. Strain gauge 31 is used to control the valve 27 may also be used to account for the weight of the load transported by the vehicle.

In the absence of an electrical signal from the strain gauge 31 and the sensor 33, that is, when no electric current in electrical circuits 29 and 32, connected to the electromagnet 28, the slide valve of the distributor 27 takes such a position, at which the working fluid flows from him under pressure in the rear section is Yu working chamber 23 behind the piston 22, setting it in such a position at which the movable 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 wheels is set to the lowest power ratio, i.e. the least regard to turning points on these shafts. When an electrical signal to the solenoid 28 of the threshold element 30 or from the sensor 33 enable lower level in the gearbox 8 spool valve 27 under the action of the electromagnet takes another 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, the drive wheels of the vehicle is the greatest power gear ratio at which the magnitude of the turning moment on the shaft 20 of the drive of the rear wheels 6 is considerably greater than the turning moment on the shaft 19 of the drive of the front wheels 5.

When driving the rotary torque from the engine through the clutch 7 and the transmission 8 is supplied to the drive shaft 11 transfer box 9. From the shaft 11 of the rotary torque through the transmission gear before the is to the follower shaft 12, torque drove 13 center differential that distributes the turning points between the front 5 and rear 6 wheels depending on the position occupied by the slide valve of the distributor 27.

When empty body when turning on the lower, that is, the first stage in the transmission 8, the signal from the sensor 33 is created when you enable this level in the gearbox, the electromagnet 28 sets the spool valve 27 in such a position in which it directs the working fluid from the pump 26 in the front section of the working chamber. 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 connects with the shaft 20 of the gear coupling 21 of the crown gear 16. Then the torque from the carrier 13 is transmitted to the shaft 19 driving the front wheels via the satellite 14 and the sun gear 17 and the shaft 20 of the drive of the rear wheels 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 drive of the rear wheels 6 during acceleration of the vehicle is significantly greater than on the shaft 19 of the drive of the front wheels 5. When you enable the second stage in the transmission stop signal from the sensor 33, a spring-loaded spool valve 27 under the action of return p the dinners returns to its original position, then the distributor 27 directs the working fluid pressure 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 with the shaft 20 of the drive of the rear wheels 6 sun gear 18. Then the turning point comes from the led 13 to the shafts 19 and 20, the drive wheels of the vehicle via the satellite 14 and 15 and through the sun gear 17 and 18. In this case, between the shafts 19 and 20 for better drivability is set to the lowest power ratio at which the turning point is distributed between the wheels equally.

When laying in the back of the 3 heavy cargo with a weight in excess of half the capacity of the vehicle, the electrical signal generated by the strain sensor 31, is quite large and consequently passes through the threshold element 30 to the solenoid 28, which moves 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 connects with the shaft 20 of the gear coupling 21 of the crown gear 16. Then torque the carrier 13 is transmitted to the shaft 19 driving the front wheels via the satellite 14 and the sun gear 17, and on the shaft 20 of the drive of the rear wheels 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 drive of the rear wheels 6, on which is loaded the body, is significantly greater than on the shaft 19 of the drive of the front wheels 5. If the terms of the motion of the car is very good, and the mass of the load is slightly higher than half the capacity of the vehicle, causing the driver of the vehicle turns on high, that is the fifth level in the gearbox, when the car develops high speed, to improve traffic safety by improving the controllability of the vehicle by the signal from sensor 36 enable the highest level in the gearbox is opened, the contact 34 of the relay 35, and thus the termination of the signal from the strain gauge 31 to the solenoid 28 of the control valve 27. A spring-loaded spool valve 27 under the action of the return spring returns to its original position, whereupon the valve 27 directs the working fluid pressure in the rear section of the working chamber 23, by setting the piston 22 and an associated gear clutch 21 in the position in which the toothed clutch connects the sun gear 18 with the shaft 20 of the drive of the rear wheels 6. Then turning parts, all specifications the juncture comes from the led 13 to the shafts 19 and 20, the drive wheels through both satellites 14 and 15 and through both of the sun gears 17 and 18. In this case, the rotary torque is distributed between the shafts 19 and 20, the drive wheels equally.

After transport and removal of cargo from the vehicle 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 position at 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 gear coupling 21 with the shaft 20 of the drive back colestid when moving the empty car to the place of loading in its body 3 cargo turning point to be divided equally between his wheels, and then load them on their bus in this case, when the empty body is approximately the same.

In the transmission of the truck with front and rear-wheel drive transfer case with a center differential that contains two planetary range, switchable signal obtained when loading cargo into the truck from the set under the body strain gauge, and the signal generated when switching the stupa is it in the gearbox, ensured timely automatic redistribution of the load on the wheels, resulting in easier maintenance of the car improves its maneuverability and controllability, reduced tyre wear.

1. The truck with the front and rear wheels, 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 wheels, which are the transmission with clutch and transfer case with a center differential that contains two planetary range, switchable gear clutch, hydraulically driven piston located in the two working chamber communicated with a source of pressure fluid through a two-position hydraulic valve controlled by an electromagnet, which one electrical circuit connected across the threshold item referred to the strain sensor, which responds to the presence of cargo in the back, and another electric circuit connected to the sensor on the lower level in the gearbox, an electrical circuit connecting the solenoid with strain-gauge sensor is tripping latch contact reuleaux is, connected to the sensor on the higher level in the gearbox.

2. Truck according to claim 1, characterized in that the said strain gauge placed 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.



 

Same patents:

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.

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EFFECT: better drivability and flotation of vehicle.

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20 cl, 3 dwg

FIELD: transport.

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EFFECT: better drivability and flotation of vehicle.

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FIELD: transport.

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5 cl, 6 dwg

FIELD: mechanical engineering.

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Muscular drive // 2270780

FIELD: transport engineering; bicycles.

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FIELD: transport.

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FIELD: transport.

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FIELD: transport.

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FIELD: transport.

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EFFECT: better flotation.

6 dwg

FIELD: transport.

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EFFECT: increased flotation.

4 dwg

FIELD: transport.

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EFFECT: higher reliability.

3 cl, 2 dwg

FIELD: transport.

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EFFECT: simplified design.

3 dwg

Truck gimbal drive // 2424920

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.

EFFECT: simplified control.

12 cl, 5 dwg

FIELD: transport engineering.

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

1 dwg

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