Adjustment of torque for drive on front wheels
SUBSTANCE: power system of the front wheels can provide the possibility of independent power control on each wheel. Direct control is provided by the average and differential torque of the front wheels.
EFFECT: increase of controllability.
20 cl, 4 dwg
SUBSTANCE: group of inventions relates to construction machines. A construction machine comprises a workplace of an operator with a driver's seat (22), a support, on which the seat (22) is installed as capable of rotation around the vertical axis (A1), a bracket of a control organ, installed as capable of rotation around the specified axis (A1) relative both to the seat and the seat support, a contact element on the seat for engagement with the bracket of the control organ, a displacing element for displacement of the support bracket in direction of the contact element, a stop limiter of the seat support for limitation of displacement of the support bracket and a sensor of seat position for determination of the intermediate position of the seat. The seat may rotate around the vertical axis (A1) from the first working position into the second working position with transition over the intermediate position. When the seat moves between the first position and the intermediate position, the control organ forms the first configuration with the seat, in which the first control organ moves together with the seat so that it is in the working position in respect to the seat. When the seat rotates from the intermediate position into the second position, the control organ automatically moves into the second configuration, in which it is moved into the non-working position in respect to the seat.
EFFECT: group of inventions provides for ergonomic layout of a construction machine operator's cabin.
17 cl, 9 dwg
SUBSTANCE: invention relates to self-propelled working machine, for example, soil cutter, asphalt cutter, snow-plough with cutter, etc. Proposed cutter machine comprises main working assy composed of cutter drum running about horizontal axis and provided with cutting tools arranged in its circumference. Note here that main working tool can run in stationary mode and is actuated by the drive motor. Note here that said drive motor incorporates starting circuit for starting current limitation that comprises at least one frequency inverter. Besides, it incorporates working circuit (19) for stationary mode with bridge to shunt frequency inverter after start or reaching of stationary mode. Note here that working circuit (19) comprises the device to deactivate said bridge (9) and power supply of motor (M) from electric power source via frequency inverter (FU) at cutter drum working rpm lower than preset one and to activate said bridge (9) to shunt said inverter (FU and to supply motor (M) directly from power source at working rpm higher than preset one.
EFFECT: reliable starting, higher efficiency, lower operating costs.
19 cl, 10 dwg
SUBSTANCE: invention relates to a device for soil material excavation under water. The device comprises a pontoon equipped with an excavator made as capable of digging soil under water, actuating elements made as capable of pontoon and/or excavator movement control, the first controlling facility made as capable of tracking excavator position. At the same time the floating excavator with a back shovel also comprises the second controlling facility made as capable to track load experienced by the excavator, and the third controlling facility made as capable to track pontoon position, a computer made as capable to calculate control signals for actuating facilities on the basis of data received from the first, second and third controlling facilities.
EFFECT: technical result is increased efficiency of bottom-dredging works performance.
15 cl, 4 dwg
SUBSTANCE: proposed invention relates to self-propelled surface rotor excavator, preferably in the form of road hoe, screw-rotor snow plough or open-cut combine, with cutter-drum capable to rotate around horizontal axis and with cutter-drum drive containing at least one electric motor installed inside the cutter-drum where electric motor stator and rotor are installed inside air- and/or dust-tight motor housing. It is proposed to provide cutter-drum drive motor located inside cutter-drum body with cooling device having closed liquid cooling circuit. Due to high heating capacity of suitable cooling liquid such as oil or water and glycol mixture, small volume flows are enough for liquid cooling circuit thus allowing small pipeline cross-sections. On the other hand, due to closed structure of liquid cooling circuit, it is possible to avoid any dust entering into cutter-drum drive as well as dust generation by exhaust air.
EFFECT: lower thermal load on cutter-drum drive without increase in dust load.
14 cl, 5 dwg
SUBSTANCE: method of control of dragline excavator bucket comprising the setting of control signals by the rotation speed of lifting, traction and rotation drives, regulation of rotation speed of these drives, formation by the pre-set and current values of tension forces in lifting and traction ropes of control signals by forces in these ropes is offered, then these signals are compared by the force with the corresponding signals by the rotation speed of lifting and traction drives with the subsequent separation from the compared signals of the maximum signals, the separated control signal of the lifting drive is fed to the input of the unit of control of rotation speed of the lifting drive directly, the separated control signal of the traction drive is fed to the input of the unit of control of rotation speed of the traction drive through the first main operated key, a control signal of the rotation drive is fed to the input of the unit of control of rotation speed of the rotation drive through the second the main operated key. Besides, the current lengths of lifting and traction ropes are measured, in addition the distances to two boundaries of the bucket position of in a face with reference to face brow are measured. The lengths of traction ropes corresponding to the bucket position on the named boundaries, and the length of lifting ropes corresponding to the bucket position on the boundary of bucket braking are pre-set; the level of limitation of a control signal of the traction drive at the bucket position on the boundary of restriction of bucket speed and additional force of tension of lifting ropes at the bucket position on the boundary of bucket braking. During excavation the current lengths of lifting and traction ropes are compared with their preset values to the named boundaries. Also the device for control of movement of dragline excavator bucket comprising the units of control of rotation speed of lifting, traction and rotation drives, units of separation of control signals of lifting and traction drives, the inputs of which are connected to outputs of the corresponding setting device of rotation speed of these drives and regulators of tension forces of lifting and traction ropes is offered, the first input of each of the latter is connected to an output of the corresponding setting device of tension force of ropes, and the second - to an output of the corresponding converter of tension force of ropes, meanwhile the input of the unit of control of rotation speed of the lifting drive is connected directly to an output of the unit of separation of control signal of the lifting drive, the input of the unit of control of rotation speed of the traction drive is connected to an output of the first main operated key, and the input of the unit of control of rotation speed of the rotation drive is connected through the second operated key to an output of the setting device of rotation speed of this drive, and also converters of length of lifting and traction ropes. The device is additionally fitted with three nonlinear elements, four additional operated keys, an element of limitation of a control signal of the traction drive and a setting device of additional tension of lifting ropes. Meanwhile the input of the first nonlinear element is connected to an output of the converter of length of lifting ropes, and inputs of the second and third nonlinear elements - to an output of the converter of length of traction ropes, the output of the first nonlinear element is connected to the operating input of the first additional key, the output of the second nonlinear element is connected to the operating inputs of the second and third additional keys, the output of the third nonlinear element is connected to the operating input of the first and second main keys and the fourth additional key. The input of the first main key is connected to an output of the unit of allocation of control signal of the traction drive through the first and second additional keys, and also through the first additional key, an element of limitation of control signal of the traction drive and the third additional key. The fourth additional key is included between an output of a setting device of an additional tension of lifting ropes and the third input of the regulator of a tension of lifting ropes.
EFFECT: improved characteristics.
4 cl, 2 dwg
SUBSTANCE: proposed device comprises control lever 3 to be actuated by operator to turn about pivot point H that has free end 5. Note here that control lever 3 can displace in vehicle lengthwise direction between near position P5 of operator and far position P1 for control over vehicle starting clutch. Besides, control lever 2 comprises extra support 4 to be attached to vehicle body for support of operator hand when its acts on control lever 3. Note also that control lever 3 has mid part 7 arranged between free end 5 and support point H and shaped to partially cover said support element 4 at near position P5.
EFFECT: safe and friendly control.
14 cl, 6 dwg
SUBSTANCE: system contains electronic control unit to control attachments, transmission, engine and machine steering mechanisms, facility for measuring parameters of its motion (actual and ideal speed, slippage, etc.), control instruments and display. Machine motion parameter measurement is performed using micromechanical gyroscopes and accelerometers. In the system, prediction of running forward machine board slippage amount is performed with subsequent optimisation of machine turning radius. Following is implemented in the system: automatic adjustment of machine motion speed depending on motion route irregularities identified during previous machine run, as well as attachment control from condition that irregularities of ground surface formed by its cutting edge does not result in necessity to decrease rollback speed. Machine control is optimised for works on slopes and sidehills, on loosened rocky materials, in confined areas, when electric cables and metal objects are present in processed ground. Various types of machine motion programmed control are implemented including control over curved routes and over previous machine trace. Automated control of brakes and machine engine fuel feed is implemented.
EFFECT: higher productivity of excavatory-transport machine and improvement of operator working conditions.
12 cl, 1 dwg
SUBSTANCE: invention relates to mining particularly to openworking of rocks. Proposed method comprises setting of the drive operating and maximum possible speeds, measurement of current force and its comparison with preset magnitude. Note here that two types of zones in excavation face are localised by coordinates of gotten blast wells and actual parameters of drilling-and blasting jobs that differ in probability of maximum dynamic load expectation. At the first zone, that of probable expectation of maximum dynamic loads, located around gotten blast wells with accrual parameters of drilling-and blasting jobs not complying with design values, drive speed is changed from maximum to operating magnitude. At second zone, that of probable expectation of maximum dynamic loads and localised by the position of gotten well spacing with actual parameters of drilling-and blasting jobs, after confirmation of maximum preset digging forces, drive operating speed is set. If maximum loads are not confirmed in the next excavation cycles, drive speed is changed to maximum value. Drive maximum speed is used beyond the zones of maximum dynamic load expectation.
EFFECT: higher efficiency of excavation.
SUBSTANCE: invention relates to earth mover control systems. Shovel penetration drive control device incorporates the drive and the controller to generate output signal to vary shovel penetration rate. Note here that said controller can detect drive rpm range wherein actuator output signal increase at increase in drive rpm and, on the contrary, decrease at its decrease. Besides, proposed system comprises user's interface for manual control over drive rpm.
EFFECT: higher efficiency owing to better adaptability to varying conditions.
11 cl, 28 dwg
SUBSTANCE: maximum electric capacity taken by a mine excavator comprising electric motors, from a source of electric power, is reduced by supplying additional electric capacity from a device of electric energy storage. At the same time the input electric power taken by the mine excavator is cyclic. For electric power taken from the source of electric power, the upper limit is set. When input electric capacity taken by the mine excavator exceeds the upper limit, the electric energy storage device, in particular, a bank of ultracapacitors, supplies electric power. Besides, the bank of ultracapacitors may be charged by the source of electric capacity during intervals between peaks of consumption. And electric capacity generated by electric motors operating in generator interval may also be collected and accumulated in the electric energy storage device.
EFFECT: increased efficiency and reliability of operation of an excavator due to limitation of peak takeoff of electric energy by mine excavators from a source of energy.
30 cl, 18 dwg
SUBSTANCE: system comprises oil station with delivery and drain lines, metering pump articulated with steering wheel and communicated with pressure and drain hydraulic lines and, via hydraulic lines and normally-closed three-line two-way hydraulic pressure control valves with rod ends of friction gear hydraulic cylinders, their piston ends being communicated via normally-open three-line two-way hydraulic control valves with oil station hydraulic pressure line, and brake hydraulic cylinders with piston spring loaded towards cut-off side. Brake hydraulic cylinders are connected with friction gear control hydraulic cylinders via extra hydraulic lines and extra normally closed three-like two-way hydraulic control valves via extra orifices made in friction gear control hydraulic cylinders to communicate extra hydraulic lines with piston ends at extended rods and, with rod ends, at pulled-in rods.
EFFECT: separate control over LH and RH sides at whatever radius of turn.
3 cl, 2 dwg
FIELD: transport engineering; mechanical and hydromechanical transmissions of track vehicles with reduction gear type steering gears.
SUBSTANCE: proposed transmission of track vehicle has nonreversible gearbox 1 whose input shaft 2 is coupled with driving gear 3 of final drive 4. Driven gear 5 of final drive 4 is rigidly and coaxially installed on driving drum 6 of steering gear, being in constant meshing with driving gear 3. Four planetary three-member mechanisms are coaxially installed driving drum 6. Two similar internal planetary mechanisms with single-rim planet pinions include sun gears 7 and 8, carriers 9 and 10 and epicyclical gears 11 and 12. Carrier 9 and epicyclical gear 12 are interconnected and connected with driven shaft 13 of steering mechanism. Carrier 10 and epicyclical gear 11 are interconnected and are connected with driven shaft 14 of steering mechanism. Two similar external planetary mechanisms with two-rim planet pinions include sun gears 15 and 16, carriers 17 and 18 and epicyclical gears 19 and 20. sun gears 7 and 15 are rigidly interconnected and are connected with driving drum 6 by means of controlled friction clutch 21. Sun gears 8 and 16 are rigidly interconnected and are connected with driving drum 6 by means of controlled friction clutch 22. Sun gears 7 and 15 are furnished with controlled steering brake 23, and sun gears 8 and 16 are furnished with controlled steering brake 24. carriers 17 and 18 of external planetary mechanisms are provided with two support brakes 25 and 26. Epicyclical gears 19 and 20 of external planetary mechanisms are rigidly and coaxially secured on driving drum 6. Driven shafts 13 and 14 of steering gear are furnished with stop brakes 27 and 28 and are connected with driving wheels 31 and 32 of vehicle through track reduction units 29 and 30.
EFFECT: possibility of turning in any direction at minimum radius, simplified design of gearbox, provision of complete reversing.
FIELD: transport engineering; mechanical and hydromechanical transmissions of track vehicles.
SUBSTANCE: proposed transmission includes gearbox 1 connected by shaft 2 with final drive 3. Driving gear 4 of final drive 3 fitted on shaft 2 is in constant meshing with driven gear 5 of final drive and driving gear 6 of additional gear drive 7. Driving gear 6 installed for rotation on shaft 2 is in constant meshing with driven gear 8 of additional driven 7. Final drive 3 and additional drive 7 have gear ratios of equal value and sign. Driven gear 5 of final drive 3 is coaxially secured on differential carrier 9, and driven gear 8 is coaxially secured on central gear 10 of differential. Driving gears 4, 6, respectively, of final driven 3 and additional driven 7 are furnished with two two-position controlled clutches 11 and 12. Clutch 11 in right-hand position connected, and in left-hand position disconnects driving gear 4 and driven shaft 2. Clutch 12 in right-hand position disconnects and in left-hand position connects driving gear 6 with drive shaft 2. Transmission with steering gear depicted in Fig. 1 is provided with second central gear 13 in three-member differential and several groups of air planet pinions 14 installed on carrier 9. Gears 10 13 are provided with brakes 15, 16 and they connected by means of driven shafts 17 and 18 of steering gear with driving wheels 12, 22 of vehicle through track reduction units 19, 20. Transmission depicted on Fig. 2 is provided with second central gear 13 in five-member differential, brakes 15, 16 being stop and turn brakes, two central gears 23, 24 connected by means of driven shafts 17, 18 of track reduction units 19 20 with driving wheels 21, 22 of vehicle and several groups of two-rim planet pinions 14 installed on carrier 9.
EFFECT: provision of turning in any direction at minimum radius and reliable parking braking.
FIELD: transport engineering; crawler and wheeled vehicles.
SUBSTANCE: proposed power unit consists of six-cylinder opposite diesel engine with turbocompressor supercharging and central reversible gear shifting-and-steering mechanism with high-speed complex interlocked torque converter, with two-shaft four-speed conventional gearbox with friction engagement of gears and power take off from reversible intermediate shaft of gearbox with additional creeper gear made by means of planetary train, and differential-type steering mechanism with hydrostatic transmission furnished with friction clutch to engage or disengage hydrostatic transmission from differential coupling between sides. Invention provides reduction of overall dimensions of power unit in height, reduction of distance between mating surface of engine and axis of output shafts of gear shifting-and-steering mechanism and enlarged functional capabilities of gear shifting-and-steering mechanism when power unit is used both for crawler vehicles and wheeled vehicles with steerable wheels.
EFFECT: reduced overall dimensions of power unit in height.
3 cl, 4 dwg
SUBSTANCE: rear wheel drive unit includes motors (2A, 2B) to drive the vehicle, hydraulic brakes (60A, 60B) installed on drivelines between motors (2A, 2B) and rear wheels, electronic control unit (45) and one-way clutch (50) installed in parallel to hydraulic brakes (60A, 60B) between motor and brakes. The one-way clutch (50) is engaged when forward torque is transmitted from motors to wheels and released when reverse torque is transmitted from motors to wheels. Herewith, the one-way clutch (50) is released when forward torque is transmitted from wheels to motors, and engaged when reverse torque is transmitted from wheels to motors. The electronic control unit (45) performs application of hydraulic brakes (60A, 60B) in such a manner that to couple motor sides and wheel sides when forward torque is transmitted from motor side to wheel side.
EFFECT: higher reliability.
20 cl, 25 dwg
SUBSTANCE: invention relates to vehicle with front and rear wheel drives. Vehicle comprises first and second drive motors and first and second rpm reducers. First rpm reducer decreases first motor rpm. Second rpm reducer decrease second motor rpm at rpm reduction factor smaller than first rpm reducer rpm reduction factor. Said factors of the first and second reducers are set to make rpm of certain front and rear wheels higher than that of other front and rear wheels.
EFFECT: decreased weight and overall dimensions.
4 cl, 8 dwg
SUBSTANCE: vehicle contains combustion engine and power train. Drives of wheel and track mover are provided with electromechanical transmission. Traction electric motors of wheel reducing gear drive and on-board gears of track mover, and generator are connected by electric cables. Accumulator battery, electronic accelerator and recuperative electric brake is connected with traction electric motors control system. Amount of delivered electric power determines traction force on driving wheels and is regulated depending on movers load and road-surface conditions. Control unit regulates energy storage via controlled coupling.
EFFECT: increase in vehicle flotation, its fuel economy, lowering toxicity level, improvement of power transmission efficiency.
FIELD: transport engineering.
SUBSTANCE: proposed hydrostatic transmission contains pumping station consisting of high-pressure pumps and make-up pumps, variable-capacity hydraulic motors to drive vehicle wheels coupled with high-pressure pumps by main hydraulic lines forming circulating hydraulic circuits, force-controlled valves for communicating hydraulic circuits of vehicle extreme wheel drive with hydraulic circuit of middle wheel drive. Bypass hydraulic lines are connected in each hydraulic circuit with main hydraulic lines. Bypass lines are provided with relief valves. Space of relief valves before shutoff member communicates with one of main hydraulic lines, and space behind shutoff member communicates through restrictor with the same main hydraulic line, and through check valve, with drain hydraulic line. Pilot valve is arranged in drain line is controlled by electric device connected with power source by electric circuit in which switching element of relay is arranged which is connected with electric control circuit of pneumatic valve communicating parking brake cut-in pneumatic chambers with source of compressed air and to which electric devices for changing working volume of hydraulic motors of all hydraulic circuits are connected through diode.
EFFECT: improved safety of operation of wheeled vehicle hydrostatic transmission.
5 cl, 2 dwg
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.
18 cl, 5 dwg