Travel-motion hydromechanical drive of rubber mounted-mounted excavator

FIELD: mechanical engineering; excavators.

SUBSTANCE: proposed hydromechanical travel-motion drive of rubber tire-mounted excavator contains power plant, hydraulic drive consisting of pumps, hydraulic motors, travel-motion power hydraulic lines, drain hydraulic lines, servo control hydraulic lines, control units, hydraulic speed selector, hydraulic distributor with address travel spool which connects, in neutral position, travel-motion power hydraulic line with drain hydraulic line through restrictors, mechanical drive including gearbox with synchronizer, gearbox control mechanism with servodrive, propeller shafts, front and rear axles and wheels. Additional circuit is placed in servo control hydraulic line between hydraulic speed selector and servodrive of gearbox control mechanism consisting of two control two-position spools, servocontrol hydraulic lines logic OR hydraulic valve whose input taps are connected with travel-motion hydraulic lines, and output tap, with control space of first spool, connecting in first position, control space of second spool with drain hydraulic line, and in second position, hydraulic line of second speed of gearbox control mechanism servodrive. With second spool in first position, hydraulic lines of first and second speeds of hydraulic speed selector are connected with corresponding hydraulic lines of first and second speeds of gearbox control mechanism servodrive and is second position, hydraulic line of first speed of gearbox control mechanism servodrive is connected with drain hydraulic line, and hydraulic of second, with servo control pressure hydraulic line.

EFFECT: faultless changing over from second into first speed on the run.

2 dwg

 

The invention relates to the field of engineering, namely, excavators wheel on the go with the hydromechanical drive.

Known wheel excavator (patent No. 2184193), selected as a prototype, with hydromechanical actuator stroke, containing power unit, hydraulic actuator, consisting of pumps, hydraulic motors, power hose progress, drain hose, hose servo, control units, hydraulic shifter, valve with address spool stroke, in the neutral position connecting the power hydroline progress with drain hydroline through the choke, mechanical drive including a transmission synchronizer, a switching mechanism gearbox with servo, drive shafts, front and rear axles, wheels.

Transmission, representing the gear reducer has an input shaft, which is transmitted torque from the gear on the output shaft of the motor and the output shaft that transmits torque to the drive shaft and then to the front and rear axles and wheels. Torque from the primary shaft to the secondary is transmitted as follows. On the primary shaft is rigidly fixed to the first gear and second gear. On the splined secondary shaft mounted movable gear, movable along the axis of the shaft mechanism is SMOM gear. In the "first speed" on the sliding gear is transmitted torque from the first gear transmission. In the "second speed" on the sliding gear is transmitted torque from gear second gear. When this is switched on respectively the first or second gear. In the intermediate position "neutral" mobile gear is engaged and torque of the output shaft is not transmitted from the primary.

A significant disadvantage of this drive is that when shifting from second gear to first go at driving speeds of 25 km/h overload elements of the transmission, which leads to breakdowns (prilipanie synchronizer cones, the broken shaft of the gearbox). This is because the primary gear and the secondary shaft of the gearbox have a big difference of pace. When shifting the synchronizer tries to align the speed, but since the output shaft is transmitted torque through the drive shafts, front and rear axles of the wheels, the synchronizer eventually have to slow down the entire excavator, resulting in overloading of the transmission. Strengthening of relevant structural elements does not eliminate the causes of damage and does not guarantee the required reliability of the transmission. To be the resignation gearbox it is necessary to ensure this condition, to switch from the second gear to the first on the move occurred only when the secondary shaft safe speed (hereinafter a safe speed of rotation of the secondary shaft means speed of 0.5 rpm).

Task to be solved by the present invention is directed, is the creation of a design hydromechanical actuator stroke pneumatic excavator, is free from the above disadvantage.

This task is solved in that in hydromechanical actuator stroke pneumatic excavator containing power unit, hydraulic actuator, consisting of pumps, hydraulic motors, power hose, drain hose, hose servo, control units, hydraulic shifter, valve with address spool stroke, in the neutral position connecting the power hydroline progress with drain hydroline through the choke, mechanical drive including a transmission synchronizer, a switching mechanism gearbox with servo, drive shafts, front and rear axles, wheels, hydroline steering between the hydraulic shifter and a servo mechanism for switching transmission enabled an additional circuit consisting of two governors-off spools, gidrol the s servo and logic valve OR the input taps of which are connected with a power hose progress, and the output tap with the control cavity of the first valve in the first position connecting the control cavity of the second valve with drain hydroline, in the second position with hydroline second gear servo mechanism, the gearbox shift in the first position of the second slide valve hydroline first and second gear hydraulic shifter connected to respective hose first and second gears of the servo mechanism, the gearbox shift, in the second position - hydroline first gear servo mechanism, the gearbox shift is connected to the drain hydroline, hydroline second gear with pressure hydroline servo control.

The declared technical features are significant because they affect the technical result achieved.

The study of other known technical solutions in this field of technology the features distinguishing the claimed technical solution, have not been identified. This allows us to conclude that the claimed technical solution is new and not obvious from the current level of technology.

The proposed solution can be applied in the production of wheel-mounted excavators.

Summary of the invention according to sdaetsa drawings, which figure 1 is a perspective view of a hydromechanical actuator stroke pneumatic excavator, figure 2 shows the hydraulic circuit diagram.

Hydromechanical actuator stroke pneumatic excavator contains the propulsion unit 1, box 2 gear mechanism 3 switch box 2 gearbox, propeller shaft 4, a front axle 5, the rear axle 6, the wheel 7, the pump 8, the hydraulic motors 9, power hydroline 10 stroke, the drain hydroline 11, hydroline 12 servo. The hydroline 12 steering include drain hydroline 13, pressure hydroline 14 steering, hydroline 15 of the first transmission and hydroline 16 second gear servo mechanism 3 switch box 2 transmission. In addition, the block 17 controls, hydraulic switch 18 speeds, the valve 19 to address the spool 20 moves, in the neutral position connecting the power hydroline 10 progress with drain hydroline 11 through the choke (see Vasilchenko, VA Hydraulic equipment of mobile machines. The Handbook. M., engineering, 1983, Scheme 6, p.139).

In the hydroline 12 servo includes an additional circuit consisting of the governors of the two-position spools 21 and 22, the hose 23 steering, drain hydroline 24 and logic valve 25 OR.

Work hydromechanical actuator stroke pneumatic excavator.

In% the SSE movement of the excavator on the second transmission hydraulic switch 18 speed is set to the second speed. The direction of motion "move forward" or "move back" using the unit 17 that controls the address of the spool 20 moves, and a pump 8. Driven power unit 1 pumps 8 pumping the working fluid through the address the spool 20 to move to the motors 9, which transmit torque box to 2nd gear and then through the drive shaft 4, front axle 5, rear axle 6 wheel 7. The resulting pressure of the working fluid in a power hose 10 stroke is transmitted through the logic valve 25 OR the spool 21, switching it to the second position. Consequently, the working fluid from the hydroline 16 second gear servo mechanism 3 switch box 2 will include a slide valve 22, causing hydroline 15 first gear servo mechanism 3 switch box 2 gear will be connected with the drain hydroline 13, and hydroline 16 second gear with pressure hydroline 14 servo control.

To switch from the second gear to the first on-the-go, the operator turns off the unit 17 controls and sets the hydraulic switch 18 speeds in the position of "first rate", with the address of the spool 20 course will take a neutral position, the power hydroline 10 turn connects with the drain hydroline 11. The excavator will continue to move "coasting" for the odd inertia rectilinear motion. Wheel 7 will transmit torque through the front axle 5, the rear axle 6, the drive shaft 4 to the hydraulic motors 9, which will begin to pump the working fluid power hose 10 stroke, as well as those connected with the drain hydroline 11 through chokes address of the spool 20 moves, then it will have a differential pressure transmitted to the logic valve 25, OR, and through him on the spool 21, leaving him in second position. Hydroline 16 second gear will remain connected to the pressure hydroline 14 servo control, and the switching mechanism 3 of the box 2 of the transmission in position "second gear".

The motors 9 and the secondary shaft 2nd gear will rotate with the gradual slowdown. This will reduce the flow rate of the working fluid passing through the choke address of the spool 20 moves, and consequently, will decrease and the pressure transmitted to the logic valve 25 OR. When the secondary shaft 2 of the transmission reaches a safe speed, pressure fluid logic valve 25 OR become equal to the pressure in the drain hydroline 11. At this point, the valve 21 will return to the first position, the control cavity of the valve 22 will be connected with the drain hydroline 24 and valve 22 will return to the first position. The hydroline 12 servo control of the first and second transmission hydraulic plumage is of locates speeds will be connected with the corresponding hose 15 and 16 of the first and second gear servo mechanism 3 switch box 2 transmission. Will switch second gear to first.

On switching from the first transmission to the second loop no effect.

Hydromechanical actuator stroke pneumatic excavator containing power unit, hydraulic actuator, consisting of pumps, hydraulic motors, power hose progress, drain hose, hose servo, control units, hydraulic shifter, valve with address spool stroke, in the neutral position connecting the power hydroline progress with drain hydroline through the choke, mechanical drive including a transmission synchronizer, a switching mechanism gearbox with servo, drive shafts, front and rear axles, wheels, characterized in that the hydroline steering between the hydraulic shifter and a servo mechanism for switching transmission includes additional circuit consisting of two governors-off spools, hose servo and logic valve, or the input taps of which are connected with a power hose progress, and the output tap with the control cavity of the first valve in the first position connecting the control cavity of the second valve with drain hydroline, the second position is - with hydroline second gear servo mechanism, the gearbox shift in the first position of the second slide valve hydroline first and second gear hydraulic shifter connected to respective hose first and second gears of the servo mechanism, the gearbox shift, in the second position - hydroline first gear servo mechanism, the gearbox shift is connected to the drain hydroline, hydroline second gear with pressure hydroline servo control.



 

Same patents:

FIELD: construction and road building.

SUBSTANCE: invention relates to construction and road-building machinery, particularly, to single-bucket front-end with hydraulic-operated loading equipment. Proposed front-end loader with energy saving hydraulic drive of loading equipment contains base chassis with portal which carries loading equipment consisting of boom, rocker, tie-rod and bucket. Limit switch installed on boom has roller which is in constant contact with cam mounted on portal. Typical hydraulic drive of loading equipment includes boom and bucket cylinders, additional boom cylinder hinge connected with portal and boom, oil tank, pneumohydraulic accumulator, hydraulic distributor and other hydraulic mechanical connected by hydraulic lines into system providing control of all operations of machine working process. Hydraulic drive of loading equipment is furnished additionally with hydraulic pump, two-position and three-position electrohydraulic spools. In initial position and in position of lifting of loading equipment to height of unloading of loose material into vehicle, pressure hydraulic line of additional hydraulic pump is connected through channel of two-position electrohydraulic spool with drain hydraulic line and rod space of additional boom cylinder, and its piston space communicates through channel of three-position of electrohydraulic spool with liquid space of pneumohydraulic accumulator. In position of unloading of bucket into vehicle, pressure hydraulic line of additional hydraulic pump communicates through channels of two-position and three-position electrohydraulic spools with rod space of bucket cylinder, and piston space of said cylinder communicates through channel of three-position electrohydraulic spool with piston space of additional boom cylinder, and in lowering position of loading equipment, like spaces of additional boom and bucket cylinders communicate through channels of three-position electrohydraulic spool.

EFFECT: increased capacity owing to reduction of power consumption, reduced time of working cycle, facilitated conditions of operation for crane operator.

6 dwg

FIELD: construction engineering and mining machinery.

SUBSTANCE: invention relates to drives of cyclic action machines. Propose hydraulic drive includes power motor, flywheel, pumping set, hydraulic motor regulated to "p=Const", hydraulic motors of actuating mechanisms valves "OR" installed between pressure and drain main lines of hydraulic motors of actuating mechanisms, distributing equipment and tank. Pumping set is made two-section. Shaft of one section of pumping set is mechanically coupled with shaft of power motor, and shaft of other section is mechanically coupled with shaft of hydraulic motor and flywheel, and flywheel is coupled with shaft of motor by overrunning clutch.

EFFECT: improved reliability and economy of drive owing to provision of constant loading of motor.

1 dwg

FIELD: boom earth-shifting, mining, construction and other cyclic handling machinery provided with wheels or caterpillars.

SUBSTANCE: balancing device comprises working implement, main hydraulic cylinder and balancing pneumohydrocylinder. The pneumohydrocylinder includes piston cavity communicated with gas cylinder. Device also has working liquid distribution means, hydraulic pump provided with parallel main hydraulic cylinder and pneumohydrocylinder installed in the hydraulic pump and brought together with respect to longitudinal axis of working implement symmetry. In accordance with the first embodiment working liquid distribution means is installed to alternately communicate working cavities of main hydraulic cylinders with hydraulic pump and with hydraulic reservoir inlet. In the second embodiment working liquid distribution means may connect working cavities of main hydraulic cylinder with each other and with hydraulic pump in the first slide position, wherein main hydraulic cylinder dimension ratio is selected to provide ratio of square of piston diameter to square of shaft diameter equal to 2. In accordance with the third embodiment main working liquid distribution means provides alternate communication of main hydraulic cylinder working cavities with hydraulic pump and with hydraulic reservoir inlet, wherein additional distribution means is installed to provide connection of working cavities of main hydraulic cylinder with each other and with hydraulic pump in the first slide position. In the forth embodiment main distribution means may connect working cavities of main hydraulic cylinder with each other and with hydraulic pump in the first slide position, as well as with each other and with hydraulic reservoir inlet in the second slide position, wherein additional distribution means is installed to connect shaft end of balancing pneumohydrocylinder with hydraulic reservoir inlet in the first slide position and with hydraulic pump in the second slide position.

EFFECT: simplified structure, extended range of functional capabilities and increased rate of working implement lifting and lowering.

5 cl, 7 dwg

FIELD: construction and mining, particularly cyclic machine drives.

SUBSTANCE: hydraulic drive comprises pump, hydraulic monitor controlled by means of following slide. Above components are brought into rotation by power engine with flywheel. Hydraulic drive also has hydraulic cylinders for executive tools including hydraulic cylinder for working equipment, check valves installed between pressure and drainage pipelines of hydraulic cylinders for executive tools, distribution means including three-position distributor and three-position distributor control unit, as well as tank. Hydraulic drive is provided with two two-position slides. Control cavity of one two-position slide is connected to piston cavity of hydraulic cylinder. Control cavity of another two-position slide is communicated with control cavity of distributor. Inlet of the first two-position slide is connected with control unit, outlet thereof is linked to control cavity of distributor. Another outlet of the first two-position slide is connected to inlet of the second two-position slide having the first outlet linked to tank and the second outlet communicated with control cavity of following slide.

EFFECT: increased economical efficiency of the drive due to pumpback of lifted working equipment potential energy into the drive.

2 cl, 1 dwg

FIELD: mining, particularly hydraulic drives of earth-moving machines.

SUBSTANCE: hydraulic system comprises hydraulic pump, hydraulic reservoir, hydraulic cylinders for bucket drive, front gate, rear wall, as well as pressure valve with filling-up hydraulic cylinder having rod end communicated with hydraulic reservoir. Serially arranged between hydraulic pump and blind side of filling-up hydraulic cylinder are electrically driven two-position two-way valve member, check valve, hydraulic accumulator with pressure relay and hydrocontrolled two-position two-way and four-way valve members. Two-way and four-way valve members have control cavities communicated with rod end of rear wall drive hydraulic cylinder. Opened line of electrically driven two-way valve member connects hydraulic pump and blind side of filling-up hydraulic cylinder through check valve, hydraulic accumulator, pressure relay and opened lines of two-position two-way and four-way valve members. Closed line of hydrocontrolled two-position four-way valve member disconnects hydraulic pump and rod end of filling-up hydraulic cylinder. All inlets and outlets are connected with each other through the four-way valve member in the second position.

EFFECT: decreased power inputs for filling-up hydraulic cylinder operation due to possibility of hydraulic accumulator usage.

2 dwg

FIELD: mechanical engineering, particularly earth-moving and construction equipment to be operated at low temperatures.

SUBSTANCE: device for hydraulic drive heating comprises heat engine and hydraulic pump kinematically connected with each other. Device also has liquid heat carrier circulation loop including heat accumulator and connected to heat engine exhaust pipe through two-way valve. Heating member is arranged in tank and linked to heat engine generator.

EFFECT: increased simplicity and efficiency of hydraulic drive heating at negative ambient temperatures.

1 dwg

FIELD: mechanical engineering, particularly earth-moving and construction equipment to be operated at low temperatures.

SUBSTANCE: device for hydraulic drive heating comprises heat engine and hydraulic pump kinematically connected with each other. Device also has liquid heat carrier circulation loop including heat accumulator. Heat pipe is connected to heat engine exhaust pipe through two-way valve. Heating member is arranged in tank and linked to heat engine generator.

EFFECT: increased simplicity and efficiency of hydraulic drive heating at negative ambient temperatures.

1 dwg

FIELD: mechanical engineering.

SUBSTANCE: group of invention relates to boom earth-moving, mine, construction and loading lifting-and-transporting machines of cyclic action. Proposed balancing system contains working equipment, boom hydraulic cylinders and balancing cylinder including hydraulic rod space and gas piston space connected with gas bottle, and distributors. According to first design version, hydraulic rod space of balancing cylinder is connected by hydraulic line with drain into hydraulic tank, and distributor of hydraulic liquid is installed for connecting in one position of spool, of boom hydraulic cylinders working spaces to each other with hydraulic pump. According to second design version, distributor is installed in system for connecting working spaces of boom hydraulic cylinders to each other and with hydraulic pump. According to third design version, rod space of balancing cylinder is connected with distributor installed for connecting, in one position of spool, of rod space of balancing cylinder with into hydraulic tank, and in other position, with hydraulic pump. Distributor is installed in hydraulic line of boom hydraulic cylinders for connecting, in one position of spool, of spaces of boom hydraulic cylinders to each other and with hydraulic pump.

EFFECT: increased capacity of machine owing to higher speed of lifting and lowering of working equipment.

5 cl, 6 dwg

FIELD: earth-moving and transport machines, particularly blade assemblies having changeable width of cut.

SUBSTANCE: blade assembly comprises side sections and central section. The sections are provided with undercutting blades and are directly connected to bucket bottom. The central section is hinged to bucket bottom and is operated by rotation hydraulic cylinders through operation levers. Undercutting blades made as gussets are connected to inner edges of side sections from below. The gussets have supports to cooperate with central section in lower position thereof. Undercutting blades of central section are connected to outer side edges of central section. Undercutting gussets are provided with orifices to arrange fixers installed in lower parts of side sections so that they may cooperate with end switches. Position switches adapted to cooperate with operation levers of central section in central or extreme positions are mounted on bucket side walls. Hydraulic cylinders for central section rotation are linked in pairs to hydraulic cylinders for bucket operation. Lifting and lowering cavities of hydraulic cylinders are correspondingly communicated with raising and deepening cavities of hydraulic cylinders for central section rotation. Hydraulic drive for blade assembly includes hydraulically operated on-off three-way slide. The first outlet of the slide is united with the third one and is linked to raising cavity of hydraulic cylinder for central section rotation. Operational chamber and the first inlet of the slide are connected to outlet of pressure slide having output connected to lowering cavities of hydraulic cylinders for bucket operation. The second and the third inlets of on-off three-way slide are correspondingly connected to lifting cavities of hydraulic cylinders, which operate front bucket gate and lowering cavity of hydraulic cylinders for bucket operation.

EFFECT: decreased load to be applied to blade system during earth cutting as central section is in central and extreme positions, provision of automatic installation of above section in side blade plane and in extreme positions.

9 dwg

FIELD: earth moving machinery.

SUBSTANCE: invention relates to hydraulic drives of draw-booster gears of tractor-drawn scrapers. Proposed hydraulic drive contains pump, hydraulic tank, hydraulic cylinder, pressure valve connected in parallel with hydraulic cylinder, and hydraulic distributor. Hydraulic drive contains additionally hydraulic accumulator, time relay, check valve, pressure valve is provided with control line, and hydraulic cylinder has control arm engaging with two-position spool whose input is connected with pump and output, through time relay, with hydraulic accumulator and control line of pressure valve and with input of check valve whose output is connected to input of pressure valve.

EFFECT: provision of automatic continuous increase of adhesion weight of tractor of scraper when digging.

3 dwg

The invention relates to a device for controlling the working speed of the vehicle in the production of works on technical maintenance, installation and repair of railway tracks and catenary

FIELD: motor transport engineering, in particular, step-by-step planet gear boxes for vehicles.

SUBSTANCE: hydromechanical gear box enabling six forward drives and one backward drive has carter 1, hydraulic transformer 2, input link 3, output link 4 and planetary reduction gear comprising two friction clutches and three friction brakes. Planetary reduction gear consists of three planetary gear sets. First planetary gear set comprises central gear 5, planet carriers 6, and crown gear 7. Second planetary gear set comprises center gear 8, planet carriers 9, and crown gear 10. Third planetary gear set comprises center gear 11, planet carriers 12, and crown gear 13. Input link 3 is connected through friction clutch 14 to interconnected carrier 6 and carrier 9 and through friction clutch 15 to center gear 5. Center gear 8 is connected to input link 3. Center gear 5 is connected to carter 1 of gear box through friction brake 16. Friction brake 17 joins interconnected carrier 6 and carrier 9 to carter 1 of gear box. Friction brake 18 joins center gear 11 to carter 1 of gear box. There are support 19 and booster 25 within gear box carter. Piston 24 is positioned within booster 25 for compressing disks of friction brake 17. Friction disks of friction brake 18 are compressed by means of piston 20. Piston 21 positioned within support is designed for compressing friction disks of friction brake 16. Friction disks of controlled friction clutch 14 are compressed by means of piston 22. Friction disks of controlled friction clutch 15 are compressed by means of piston 23.

EFFECT: improved dynamic characteristics of vehicle and reduced dimensions of gear box.

4 cl, 3 dwg

Transmission // 2307268

FIELD: transport engineering.

SUBSTANCE: invention relates to fixed-ratio planetary transmission. Proposed automatic hydromechanical transmission with forward speeds and one reverse speed contains case 1, torsional vibration damper 2, input link 3, output link 4 and planetary reduction unit including three planetary gear trains, two friction clutches and four friction brakes. First planetary gear train consists of sun gear 5, planet pinion carrier 6 and ring gear 7. Second planetary gear train consists of sun gear 8, planet pinion carrier 9 and ring gear 10. Third planetary gear train consists of sun gear 11, planet pinion carrier 12 and ring gear 13. Friction clutch 14 connects input link 3 with ring gear 7 and carrier 9. Friction clutch 15 connects input link 3 with ring gear 10 and sun gear 5. Carrier 12 is coupled with input link 3 coupled with torsional vibration damper 2. Friction brake 16 connects ring gear 10 and sun gear 5 with transmission case 1. Friction brake 17 connects ring gear 7 and carrier 9 with transmission case 1. Friction brake 18 connects sun gear 11 and sun gear 8 with transmission case 1. Ring gear 13 is coupled with transmission case 1 by friction brake 19. Carrier 6 of first planetary gear train is coupled with output link 4 of transmission which in its turn is coupled through intermediate shaft 26 with differential 27. Friction disks of friction brakes 16,17,18,19 are pressed together by pistons 21,23,24,25 respectively. Friction disks of friction clutches 14,15 are pressed together by pistons 22,20.

EFFECT: enlarged kinematic capabilities of transmission, increased service life of transmission and improved dynamic characteristics of vehicles.

1 dwg

Transmission // 2306463

FIELD: transport engineering; automatic multispeed planetary transmission.

SUBSTANCE: proposed automatic transmission with seven forward speeds and one reverse speed contains case 1, case cover 3 and pump housing 2, torsional vibration damper 4, input member 5, output member 6 and planetary reduction gear including three planetary gear trains, two controlled friction clutches and four controlled friction brakes. First planetary gear train consists of sun gear 7, planet pinion carrier 8 and ring gear 9. Second planetary gear train consists of sun gear 10, planet pinion carrier 11 and ring gear 12. Third planetary gear train consists of sun gear 13, planet pinion carrier 14 and ring gear 15. Input member 5 is connected by friction controlled clutch 16 with carrier 11 and ring gear 15, and by friction controlled clutch 17 with sun gear 13 and ring gear 12. Ring gear 9 is connected with case 1 of transmission by friction controlled brake 18. Friction controlled brake 19 connects sun gear 7 and sun gear 7 and sun gear 10 with case 1. Friction controlled brake 20 connects carrier 11 and ring gear 15 with case 1. Friction controlled brake 21 connects ring gear 12 and sun gear 13 with case cover 3. Spaces are made in drums coupled with input member 5 of transmission in which pistons 22 and 23 are installed. Space is made in pump housing 2 which accommodates piston 24. Piston 25 is installed in booster 28 rigidly mounted in transmission case 1. Space is made in transmission case 1 which accommodates piston 26. Space made in cover 3 of case houses piston 27. Output member 6 sic coupled with differential 30 through intermediate shaft 29.

EFFECT: enlarged mechanical capabilities of transmission, increased service life and improved dynamic characteristics of vehicle.

1 dwg

FIELD: transport engineering.

SUBSTANCE: proposed vehicle with oil-hydraulic drive contains device to set into motion wheel 31 which includes oil-hydraulic motor 45 and device 41 to control speed of oil-hydraulic motor 45. Oil-hydraulic motor 45 includes output shaft 45s on which wheel 31 is mounted and great number of oil chambers 45a-45e. Each oil chamber contains driving gear wheel 46 installed on output shaft 45s to set the shaft into motion driven gear wheel 47 in meshing with driving gear wheel 46. Speed control device 41 of oil-hydraulic motor 45 includes housing 42 with round chamber of rotor 43 for free turning.

EFFECT: provision of drive mechanism of vehicle with oil-hydraulic drive whose moving force can be accurately and steplessly regulated.

2 cl, 5 dwg

FIELD: transport engineering.

SUBSTANCE: invention relates to hydraulic systems and it can be used in different vehicles and machine-and-tractor sets operating under unsteady conditions. Proposed device contains planetary train 1 consisting of crown gear 2 and reaction member 3. Reaction member 3 is connected with gear 4 of drive of oil pump 5 and gear 6 of drive of hydraulic motor 7. Gear 4 of drive of oil pump 5 is connected with pump through overrunning clutch 8. Gear of drive of hydraulic motor 7 is connected with hydraulic motor 7 through overrunning clutch 9. Oil pump 5 is connected to suction main line 10 and pressure main line 11. Hydraulic motor 7 is connected to pressure main line 12 and return main line 13. Planetary train 1 is connected with gearbox 15 by shaft of carrier 14 and is set into motion by clutch 16 of engine 17. Adjustable throttle 18 is installed in pressure main line 11. Safety valve 19, control cock 20 and control hydraulic main line 21 with hydraulic distributor 22 are connected to pressure main line 11 before adjustable throttle 18. Device contains also hydraulic tank 26 and pneumohydraulic accumulator 27 consisting of three spaces.

EFFECT: increased efficiency of device.

1 dwg

FIELD: transport engineering.

SUBSTANCE: invention can be used on vehicles operating under unstable conditions of movement. According to invention, nonlinear hydraulic damping unit is installed in transmission of vehicle. Said unit contains adjustable restrictor and least two pneumohydraulic accumulators of different rigidly. One input of restrictor is connected with main pneumohydraulic accumulator, and second input, with inputs of each additional pneumohydraulic accumulators.

EFFECT: improved reliability and increased durability of parts of power train owing to stepless change of torque transmitted from engine to wheels or tracks.

1 dwg

FIELD: transport engineering hydromechanical transmissions.

SUBSTANCE: proposed transmission has case 1, drive shaft 2 connected with engine 3, output shaft 22 connected with track assembly 5, two differential mechanisms 6 and 7 with epicyclic gears 8 and 9, carriers 10 and 11 and sun gears 12 and 13. Brake 14 is installed between case 1 and epicyclic gear 8 of differential mechanism 6. Clutch 15 with gear train 16 is installed between drive shaft 2 and epicyclic gear 8. carrier of differential mechanism 6 is coupled with sun gear 13 of differential mechanism 7 whose carrier 11 is coupled with intermediate shaft 4. Epicyclic gear 9 of differential mechanism 7 is provided with toothed clutch 17 which engages epicyclic gear 9 with case 1 in first position, and epicyclic gear 9 with drive shaft 2 through gear train 18 in second position. Transmission contains also reverse reduction gear 23 including right-hand and left-hand incomplete planetary trains, without epicyclic gears, consisting of carrier 26 coupled with case 1 through brake friction clutch 27 and by intermediate shaft 4 through lock friction clutch 28, sun gear 24 of left-hand planetary gear train of reverse reduction gear 23 coupled with intermediate shaft 4 of sun gear 25 of right-hand planetary gear train of reverse reduction gear coupled with output shaft 22 and six planet pinions 29 (three per each planetary gear train) in meshing with each other, and also right-hand sun gear 25 and left-hand sun gear 24.

EFFECT: enlarged operating capabilities of hydromechanical transmission.

1 dwg

FIELD: mechanical engineering.

SUBSTANCE: hydromechanical gear box comprises crankcase (1), fluid transformer (2), input link (3), output link (4), planet reduction gear, two friction clutches, and four friction brakes. The planet reduction gear is made of four planet rows. First planet row is made of solar pinion (5), carrier (6) of satellites, and corona pinion (7). Second planet row is made of solar pinion (8), carrier (9) of satellites, and corona pinion (10). Third planet row is made of solar pinion (11), carrier (12) of satellites, and corona pinion (13). Fourth planet row is made of solar pinion (14), carrier (15) of satellites, and corona pinion (16). Solar pinion (5) is connected with crankcase (1) of the gear box via friction brake (17). Friction brake (18) connects interconnected carrier (6) and (9) with crankcase (1). Friction brake (19) connects interconnected corona pinion (10) and solar pinion (14) with crankcase (1). Friction brake (20) connects interconnected carrier (15) and corona pinion (13) with crankcase (1) of the gear box. Output link (3) of the fluid transformer is connected with interconnected corona pinion (13) and carrier (15) via friction clutch (210 and with solar pinion (11) via friction clutch (22). Solar pinion (8) and corona pinion (7) are connected with input link (3).

EFFECT: expanded functional capabilities and prolonged service life.

9 cl, 12 dwg

FIELD: mechanical engineering.

SUBSTANCE: hydromechanical gear box comprises crankcase (1), fluid transformer (2), input link (3), output link (4), planet reduction gear, three friction clutches, and three friction brakes. The planet reduction gear is made of three planet rows. First planet row is made of solar pinion (5), carrier (6) of satellites, and corona pinion (7). Second planet row is made of solar pinion (8), carrier (9) of satellites, and corona pinion. Third planet row is made of solar pinion (11), carrier (12) of satellites, and corona pinion (13). Input link (3) is connected with interconnected solar pinion (8) and solar pinion (11) through friction clutch (14) and with interconnected carrier (9) and (12) through friction clutch (15). Carrier (9) is connected with corona pinion (13) connected with the output link (4) of the gear box through friction clutch (16). Solar pinion (5) is connected with input link (3). Carrier (6) is connected with crankcase (1) of the gear box through friction brake (17). Friction brake (18) connects interconnected carrier (9) and (12) with crankcase (1). Friction brake (19) connects interconnected solar pinion (8) and (11) with crankcase (1).

EFFECT: expanded functional capabilities.

3 cl, 6 dwg

FIELD: mechanical engineering.

SUBSTANCE: hydromechanical gear box comprises crankcase (1), fluid transformer (2), input link (3), output link (4), planet reduction gear, three friction clutches, and three friction brakes. The planet reduction gear consists of three planet rows. First planet row is made of solar pinion (5), carrier (6) of satellites, and corona gear (7). Second planet row is made of solar pinion (8), carrier (9) of satellites, and corona gear (10). Third planet row is made of solar pinion (11), carrier (12) of satellites, and corona gear (13). Input link (3) is connected with interconnected solar pinion (8) and solar pinion (11) through friction clutch (14) and with interconnected carrier (9) and carrier (12) through friction clutch (15). Carrier (9) is connected with corona gear (10) connected with corona gear (7) through friction clutch (16). Solar pinion (5) is connected with output link (3). Carrier (6) is connected with crankcase (1) of the gear box through friction brake (17). Friction brake (18) connects interconnected carries (9) and (12) with crankcase (1). Friction brake (19) connects interconnected solar gear (8) and (11) with crankcase (1).

EFFECT: expanded functional capabilities.

3 cl, 6 dwg

Up!