All-wheel-drive vehicle with hydrostatic transmission

FIELD: transport engineering; self-propelled wheeled vehicles.

SUBSTANCE: proposed vehicle contains frame 1 with cab 9, front and rear steerable wheels 4, 6 and middle wheels 5, engine placed behind the cab along vehicle and covered by hood 11. hydrostatic transmission contains pumping station 21 consisting of matching reduction gear driven by engine placed behind the cab, and three pumps connected by pipelines with hydraulic motors providing separate drives of wheels. Hydraulic motors are arranged along frame 1 between sidemembers on solid brackets made in form of boxes with flanges connected with wall of side member between its webs. Invention makes it possible to create ecologically clean and reliable multipurpose all-wheel-drive vehicle of high cross-country capacity with hydrostatic transmission to drive all wheels.

EFFECT: provision of convenient mounting and servicing of transmission units.

5 cl, 7 dwg

 

The invention relates to a self-propelled wheeled vehicles. It concerns all-wheel drive machines with hydrostatic transmission drive wheels.

In patent document describes a variety of multi-wheeled vehicles with hydrostatic transmission drive all wheels (RF patents №№2130388, 2141900).

Published in great Britain application No. 2073684 shows all-wheel drive articulated wheeled machine with hydrostatic transmission consisting of front and rear four-wheel trucks with Centerpoint suspension unmanaged wheels, one of which in each cart at each of its sides has a direct drive from the motor, and the other wheel has a chain drive from the motor. However, in such a wheeled machine, it is difficult to provide a reliable supply of fluid under pressure to the motors located on the back of the truck.

Closer to the technical essence is all-wheel drive multi-purpose wheeled machine with hydrostatic transmission, are presented in the description of the issued U.S. patent No. 4600069. This machine has at least six unmanaged wheels, evenly spaced along the frame on the opposite side, on the frame on the front, a passenger cabin, cabin across the machine placed the engine and pump station, consisting of the matching gearbox and two pumps, which pipes are connected by two axial-piston hydraulic motor, one of which chain transmission connected to the drive shafts of the wheels located at one side of the machine, and with another motor also chain transmission connected to the drive shafts of the wheels located on the other side of the machine. The rotation of this machine is made by rotation of wheels of different boards with different frequency. However, when driving off-road on weak soils this can cause damage to vegetation due to shifting soil wheels of the machine.

Task - the creation of an ecologically reliable multi-purpose four-wheel drive wheeled off-road vehicles equipped with hydrostatic transmission drive all wheels, ensuring ease of installation and maintenance of transmission units.

The solution to this technical problem is provided by the fact that all-wheel drive wheeled machine with hydrostatic transmission that contains a frame, on which the cabin has a front and rear driven wheels and located in between the middle wheels, engine, placed along the frame behind the cab, under the hood, pumping station hydrostatic transmissions, consisting of matching gear having a kinematic connection with the engine, and at least three fixed on the housing is Ogasawara gearbox adjustable axial piston pumps, which pipes are connected by adjustable axial piston motors separate drive wheels arranged along the frame between the side members and mounted on the surround brackets, each of which is made in the form of a box with flanges connected with the wall of the spar between his shelves.

When such a set of features characterizing created wheeled machine, in which each of its six wheels has a separate drive from a separate motor, all motors compactly placed along the frame between the side members to surround the brackets and are connected by a short pipeline and pumping station hydrostatic transmissions containing three axial-piston pump, fixed to the body matching gear driven from the engine, near the pumping station at the rear of the cabin, provided a convenient and compact arrangement of the units wheel of the machine and their proper functioning is due to close on their location and reliable based on a common support frame with convenient access to technical service. This technical result is achieved due to the modular construction of the hydrostatic transmissions.

In each box with flanges, forming the bracket of the motor, the cylindrical gear outer toothed forming the initial gear, driven shaft with which through the drive transmission connected to the driving shaft side gear with bevel gears, and the driven shaft with side gear through the drive transmission is connected to the wheel shaft of the gearbox.

In this machine the motors drive the middle and rear wheels are located opposite each other between the two boxes with flanges forming section starting motors, and the motors driving the front wheels offset of these wheels in the direction of the pumping station, which is located on the frame between the middle wheels.

The said hood enclosing the engine, equipped with a metal frame covered with removable panels made of polymeric material, the rear wall of the hood shifted to the pumping station and under the hood mounted heat exchangers cooling fluid hydrostatic transmissions, in the side wall of the hood are the grille, split counter, on which are fixed to the rail and below the ventilation grilles made the step, under which between the front and middle wheels of the vehicle is a staircase. This stairway is separated from the front wheel wheel wing, and from the middle of the wheel it is separated obliquely mounted flap.

1 shows a wheeled all-wheel drive machine with hydrostatic transmission, side view.

Figure 2 show the part of the wheeled vehicles located behind the cab, top view.

Figure 3 shows a wheeled machine in a perspective view.

4 shows a perspective view of the units hydrostatic transmissions of the machine.

Figure 5 shows a perspective view of the units hydrostatic transmissions together with the frame of the machine.

Figure 6 is given kinematic diagram of the drive wheels of the machine.

Figure 7 presents a simplified hydraulic circuit hydrostatic transmissions of the machine.

Wheeled machine (figure 1) contains a frame 1 consisting of side members 2 and 3 (figure 2), with the profile of the channel, and cross members connecting the side members together. On the opposite side of the frame 1 along the rails 2 and 3 symmetrically arranged wheels 4, 5, 6 of the machine. Moreover, the front wheels 4 and rear wheels 6 is controlled by means of the steering actuator 7, and in between are unmanaged secondary wheel 5. All wheels have independent torsion suspension on the frame on the transverse lever 8.

On the frame 1 on the front, a passenger cabin 9. Behind the cab 9 along the machine placed the engine 10 internal combustion, closed the hood 11. The rear wall 12 of the hood 11 is shifted from the engine towards the middle of the wheels 5 of the machine and under the hood 11 are fans with electric drive and the heat exchangers of the cooling fluid hydrostatic transmissions of the machine. The hood 11 is supplied IU aliceson frame, topped with a removable panels 13 (3) of the polymeric material to allow access to the engine, as well as fans and heat exchangers for their maintenance. In the side wall 14 of the hood 11 near its rear wall 12 has a window with mesh ventilation apertures 15, split counter, on which are fixed the handrail 16. Below ducts 15 has a step 17 under which to access it between the front wheel 4 and the secondary wheel 5 is a staircase 18. Ladder 18 is separated from the front wheel 4 wheel wing 19, and from the middle of the wheel 5 it is separated obliquely mounted flap 20.

The back of the hood 11 in its rear wall 12 on the frame 1 between the middle wheels 5 is a pump station 21 hydrostatic transmissions, consisting of matching gear 22 (figure 4), having a motor-driven machine through the drive transmission 23, and three fixed to the body matching gear 22 reversible reversible adjustable axial piston pumps 24, 25, 26. The pumps 24, 25, 26 are driven from the input shaft matching gear 22 through the gears inside the gearbox. Reduction gearing 22 is installed on the top shelf 27 (5) of the side members 2, 3. The pumps 24 and 25 are located on the body of the matching gear 22 from the side of the cab 9 rear kapuso the and 11. The pump 26 is placed in the middle on the back of the case matching gear 22.

With the pumps 24, 25, 26 pumping stations 21 pipes 28 are connected in pairs adjustable axial piston hydraulic motors 29 and 30, 31 and 32, 33 and 34 separate drive wheels of the vehicle placed along the frame 1 between its side members 2 and 3. Motors installed to surround the hollow brackets made in the form of boxes 35, 36 with the flanges 37, 38 connected with the wall 39 of the spar between the upper and lower shelves. The motors 31 and 32 medium drive wheels 5 and the hydraulic motors 33 and 34 of the rear wheels 6 are located opposite each other between boxes 35, 36 with the flanges 37, 38. The motors 29 and 30 drive the front wheels 4 is shifted from them to the side of the pumping station 21.

Boxes 35, 36 with the flanges 37, 38 serve to support the motors and as a body, gear, forming the initial gear 40 (6) in the drive wheel from the motor. Primary gear 40 is composed of a leading cylindrical gear 41, which is located coaxially with the shaft of the motor and driven cylindrical gear 42, is placed between the gear 41 and the nearest wall of the side member fixed on the building of the primary gear 40 formed box with flanges. Driven gear 42 is freely mounted on the driven shaft 43 initial gear with the possibility of connection with him subc is the coupling 44. Clutch 44 with a spring actuator for opening and pneumatic actuator for a circuit using device 45 management. With the driven shaft 43 primary gear 40 through the drive transmission 46 is connected to drive shaft 47 on-Board gear 48, containing angular gear with bevel gears. Moreover, the driving shaft 47 of the onboard gear is offset from the wall 39 of the side member on the driven shaft 43 primary gear 40 and set the brake disk 49. Driven shaft with 50 onboard gear through the drive transmission 51 is connected to the wheel shaft of the gearbox 52 placed inside the rim 53 of the wheel. On the rim 53 is set large, elastic tires 54 with adjustable air pressure in them lower when driving in areas with poor soil.

Hydrostatic transmission has three hydraulic circuits 55, 56, 57 (7), comprising a pump 24 with the hydraulic motors 29, 30 driving the front wheels 4, the pump 25 with the motors 31, 32 medium drive wheels 5 and the pump 26 with the hydraulic motors 33, 34 of the rear drive wheels 6. Hydrostatic transmission provided with valves 58 and 59 with manual control for message hydraulic circuits between them.

When driving it the engine 10 through the drive transmission 23 through gears matching gear 22 causes the rotation of the axial-piston pumps 24, 25, 26, to the e pipeline 28 serves the working fluid under high pressure to an axial piston hydraulic motors of the drive wheels of the vehicle. From pump 24, the working fluid in the hydraulic circuit 55 is supplied to the hydraulic motors 29 and 30 drive the front wheels 4, the pump 25 through the hydraulic circuit 56 is fed to the motors 31, 32 medium drive wheels 5, and from the pump 26, the working fluid in the hydraulic circuit 57 is supplied to the hydraulic motors 33, 34 of the rear drive wheels 6. From motors torque through the cylindrical gears 41, 42 and coupling 44 primary gear 40 and through the drive transmission 23 is fed to the driving shaft 47 on-Board gear 48. From the driven shaft 50 on-Board gear 48 torque through the drive transmission 51 and wheel gear 52 is applied to the wheel of a car.

To change the torque on the wheels of the vehicle to produce a modulation of the pumps 24, 25, 26, resulting in a change created them working fluid pressure supplied to the hydraulic motors of the drive wheels 4, 5, 6. This also regulate the working volume of the hydraulic motors. The result is a change in torque on the wheels of the machine.

If necessary, towing vehicle, each hydraulic motor is disconnected toothed coupling 44 from the drive wheel by stopping the supply of compressed air to the pneumatic cylinder device 45 management of this coupling. Then tooth clutch under the action of a spring device 45 managing, moving,opens the kinematic chain between the motor and the wheel.

Braking action is produced disc brakes with brake pads against the brake discs 49.

When working hydrostatic transmission cooling fluid is produced by heat exchangers located under the hood 11. The heat exchangers are blown by fans air flow circulating through the window in the hood 11, equipped with mesh grating 15.

For maintenance and repair of the engine or the fan and heat exchanger hydrostatic transmissions service personnel on the ladder 18, holding onto the handrail 16, rises on the step 17 and removes the top panel 13 of the hood 11, which provides free access to serviceable components.

The ease of maintenance, repair or replacement of motors or the initial and final drive, located on the frame in the kinematic chain between the motors and wheel gearboxes, provided that they are freely between the side members of the frame separately and can easily be removed after their separation with shaft drive transmission.

Created all-wheel drive wheeled machine multi-purpose due to the modular construction of its hydrostatic transmission has an optimal design, which ensured manufacturability of its industrial production and technical convenience the CSO maintenance units. Thanks to continuous and smooth supply of torque to the wheels through the use of hydrostatic transmissions for driving all wheels equipped with large elastic tyres, the machine is able to work reliably in off-road conditions in the tundra, sandy, marshy and wooded area without irreversible damage to the soil. It can be used during search and rescue operations, for delivery to remote destinations and as all-terrain truck.

1. All-wheel drive wheeled machine with hydrostatic transmission that contains a frame, on which the cabin, front and rear driven wheels and located at the middle between the middle wheels, engine, placed along the frame behind the cab, under the hood, pumping station hydrostatic transmissions, consisting of matching gear having a kinematic connection with the engine, and at least three fixed to the body matching gearbox adjustable axial piston pumps, with which the pipes are connected by adjustable axial piston hydraulic motors of the drive wheels arranged along the frame between the side members and mounted on the surround brackets, each of which is made in the form of boxes with flanges connected with the wall of the spar between eg the shelves.

2. Wheeled machine according to claim 1, characterized in that each box with flanges cylindrical gear outer toothed forming the initial gear with the driven shaft which through the drive transmission connected to the driving shaft side gear with bevel gears, and the driven shaft with side gear through the drive transmission is connected to the wheel shaft of the gearbox.

3. Wheeled machine according to claim 2, characterized in that the hydraulic motors drive the middle and rear wheels of the vehicle are opposite each other between the two boxes with flanges forming section starting motors, and the motors driving the front wheels offset of these wheels in the direction of the pumping station, which is located on the frame between the middle wheels.

4. Wheeled machine according to claim 3, characterized in that the hood is equipped with a metal frame covered with removable panels made of polymeric material, the rear wall of the hood shifted to the pumping station and under the hood mounted heat exchangers cooling fluid hydrostatic transmissions, in the side wall of the hood are the grille, split counter, on which are fixed to the rail and below the ventilation grilles made the step, under which between the front and middle wheels of the vehicle is a staircase.

5. Wheeled machine according to claim 4,characterized in that that staircase is separated from the front wheel wheel wing, and from the middle of the wheel it is separated obliquely mounted flap.



 

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FIELD: transport engineering; self-propelled wheeled vehicles.

SUBSTANCE: proposed vehicle contains frame 1 with cab 9, front and rear steerable wheels 4, 6 and middle wheels 5, engine placed behind the cab along vehicle and covered by hood 11. hydrostatic transmission contains pumping station 21 consisting of matching reduction gear driven by engine placed behind the cab, and three pumps connected by pipelines with hydraulic motors providing separate drives of wheels. Hydraulic motors are arranged along frame 1 between sidemembers on solid brackets made in form of boxes with flanges connected with wall of side member between its webs. Invention makes it possible to create ecologically clean and reliable multipurpose all-wheel-drive vehicle of high cross-country capacity with hydrostatic transmission to drive all wheels.

EFFECT: provision of convenient mounting and servicing of transmission units.

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FIELD: transport engineering.

SUBSTANCE: invention relates to crawler tractors and it can be used in their full-flow hydrostatic transmissions. Said transmission contains dividing reduction unit 2, two parallel final hydrostatic drives with pumps 3, 4 and hydraulic motors 5, 6, track reduction units 17, 18 and two planetary mechanisms. Planetary mechanisms are installed between hydraulic motors 17, 18 and track reduction units 17, 18. Sun gears 9, 10 of planetary mechanisms are connected with each hydraulic motor by two similar gear trains 7, 9. Carriers 11, 12 of each planetary mechanism are connected with epicyclic wheels 14, 13 of other planetary mechanism and with track reduction units 17, 18. invention improves maneuverability of tractor, provides economic recuperation of brake power from trailing side to leading side at turning of tractor, reduced power load on engine at turning, reduced power losses in hydrostatic drives of transmission of tractor with possibility of use of hydrostatic drives of lower installed power.

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FIELD: transport engineering; automobiles with positive displacement hydraulic drive.

SUBSTANCE: proposed transmission includes constant-capacity guided-vane hydraulic pump mechanically connected with vehicle engine communicating through pressure, drain and suction hydraulic lines through hydraulic distributor enclosing pressure and drain hydraulic lines and playing the part of reversor with at least one constant-capacity reversible guide-vane hydraulic motor to transmit torque to one or two driving wheels of automobile. Spaces of suction and drain hydraulic lines communicate with space of hydraulic tank. Suction hydraulic line passes through adjustable hydraulic restrictor whose control lever is mechanically coupled with automobile accelerator pedal.

EFFECT: simplified design of transmission, reduced fuel consumption and weight of transmission and its cost, and increased efficiency of automobile.

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FIELD: mechanical engineering; machine building hydraulics.

SUBSTANCE: invention can be used on vehicles and machine-and-tractor units operating under unsteady conditions of movement. Proposed device contains planetary train 1, reactive link 3 connected with drive gear of oil pump 5. Planetary train is connected through carrier shaft with gearbox 9 and is set into operation by engine 11. Two-step adjustable restrictor 12 is installed in pressure main line of pump. Safety valve 14 and control cock 15 are connected to input of adjustable restrictor, being also installed in pressure main line of pump pneumohydraulic accumulator, being end member of pressure main line, is provided with three spaces. It consists of hydraulic cylinder, free piston, piston with rod, piston position regulator, oil line and oil channel. Space between pistons is filled with oil which regulates volume.

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2 dwg

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EFFECT: improved reliability of hydrostatic transmission of vehicle designed for operation under various road conditions.

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EFFECT: improved efficiency of hydraulic - inertia converter, its control system, gearbox of converter and method of torque conversion.

24 cl, 1 tbl, 10 dwg

FIELD: mechanical engineering; vehicle hydraulic drives.

SUBSTANCE: proposed recuperative reversible stepless hydraulic transmission of wheeled vehicle contains drive engine 5, recuperator 20 with overrunning clutch 24, controllable reversible hydraulic machine 18 with pressure and suction and control plunger 8 communicating with hydraulic control system through pipelines, follow-up hydraulic booster with variable-capacity pump 12 of reverse capacity, four non-controllable hydraulic machines 29-32. Each of said hydraulic machines has vehicle wheel, and wheels of vehicle are in contact with road pavement. Recuperator 20 is made in form of planetary reduction gear whose carrier 19 is connected with pump 12 and with hydraulic machine 18 provided with two diametric pressure and two diametric suction spaces and connected with hydraulic machines 29-32 by pipelines. Hydraulic machine 18 contains "floating" plunger 33 with two cylindrical grooves between two end face spaces and "polar" plunger by channels of which end face spaces of floating plunger 33 are communicated, overlapped or reversed with pressure and suction spaces of hydraulic machine 18. Cylindrical grooves of floating plunger 33 synchronously overlap or hydraulically communicate two pressure and two suction spaces of hydraulic machine 18. Lever 6 of polar plunger is mechanically connected with corresponding slot of plate 3 of vehicle speed and reverse control member.

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FIELD: public building structures, particularly drives for showcase rotation.

SUBSTANCE: drive to rotate showcase substantially formed as superimposed disc 4 installed on pin 5 provides force transmission from drive 12 to disc 4 by means of flexible tie having tensioning means. Flexible tie is formed as closed loop of chain 10 having rigid links. The chain passes around the disc 4 along disc surface generator. Drive has sprocket 11 of driving means. The sprocket 11 is installed on shaft of hydraulic drive 12. Hydraulic drive 12 is mounted on plate 13 moving in radial direction relative disc 4 by hydraulic power cylinder 16.

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7 cl, 2 dwg

FIELD: transport mechanical engineering.

SUBSTANCE: device comprises electric means for measuring working volume of pumps and hydraulic motors and pickup (60) for measuring the speed of rotation of the shaft of the pump station. The electric circuits are provided with threshold control members (67) and (80) interconnected between pickup (6) and the electric means. Between threshold control members (67) and (80) and electric means for changing working volume of pumps (67) and (80) and hydraulic motors (13), (14), (17), and (18) of the drive of end wheels are variable resistors (77), (78), (86), and (87) that are controlled by pickups (89) and (89) of pressure difference in hydraulic circuits of the drive of the intermediate wheels and the drive of each pair of end wheels.

EFFECT: enhanced reliability and prolonged service life.

3 cl, 4 dwg

FIELD: mechanical engineering; production of drive units for engineering tools and motor vehicles.

SUBSTANCE: the invention is pertaining to the field of mechanical engineering and may be used in production of drive units for engineering tools and motor vehicles. The self-regulating infinitely variable speed transmission contains: an input shaft 9 and an output shaft 6, a centrifugal type nonadjustable hydraulic pump 3, a gear differential unit 2 with two output shafts 5, 6 and a nonadjustable hydraulic motor 4. The hydraulic pump 3 is connected to the gear differential unit output shaft 5. The nonadjustable hydraulic motor 4 is connected to the gear differential unit output shaft 6, which is an output shaft of the gear differential unit output shaft. Self-regulation of a torque of the output shaft is depending on a load by changing the number of revolutions per a minute of the centrifugal pump using the differential gear of the he self-regulating infinitely variable speed transmission. The technical result is an increased affordability due to reduction of a quantity of gears and lack of the throttling losses of a liquid and to the complete self-regulation.

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