CN203730684U - Hydraulic transmission automatic control continuously variable transmission - Google Patents
Hydraulic transmission automatic control continuously variable transmission Download PDFInfo
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- CN203730684U CN203730684U CN201420069589.6U CN201420069589U CN203730684U CN 203730684 U CN203730684 U CN 203730684U CN 201420069589 U CN201420069589 U CN 201420069589U CN 203730684 U CN203730684 U CN 203730684U
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Abstract
The utility model relates to a hydraulic transmission automatic control continuously variable transmission. The hydraulic transmission automatic control continuously variable transmission comprises a machine case, a transmission component and an overrun clutch and transmission component braking device, wherein the transmission component comprises an inner case, a transmission input shaft and a transmission output shaft, a bidirectional hydraulic variable pump, a constant displacement hydraulic motor, a variable control driving device and a control system are simultaneously arranged in the inner case, the bidirectional hydraulic variable pump and the constant displacement hydraulic motor are connected in series, the bidirectional hydraulic variable pump, the constant displacement hydraulic motor and two oil passages respectively communicated with the bidirectional hydraulic variable pump and the constant displacement hydraulic motor form a closed loop circuit, the two oil passages respectively communicated with the bidirectional hydraulic variable pump and the constant displacement hydraulic motor are respectively connected with two buffering cavities, and simultaneously a second hydraulic electromagnetic valve is installed between an oil port of the bidirectional hydraulic variable pump and an oil port of the constant displacement hydraulic motor, and a first electromagnetic valve and the second hydraulic electromagnetic valve are both electrically connected with the control system. The hydraulic transmission automatic control continuously variable transmission is simple and compact in structure, low in manufacturing cost, continuous in transmission ratio, high in bearing capacity, high in transmission efficiency, safe and reliable, and long in use life.
Description
Technical field
The utility model relates to a kind of hydraulic transmission class speed changer, particularly relates to a kind of hydraulic transmission automatic control stepless speed changer.
Background technique
At present, on automobile, use more automatic transmission be fluid torque converter and epicyclic gear system are combined automatic transmission, but it has obvious shortcoming: mechanical structure and control system are complicated, and velocity ratio is discontinuous, kinetic equation loss is large, efficiency is low, and maintenance, maintenance cost is high.Another kind of stepless speed variator (CVT), it is to adopt the fit diameter of metal driving belt and change driven wheel to realize speed change and transferring power, but the weakness of CVT is that metal tape bearing capacity is little, and transmitted power is limited, and cost is high, and the life-span is short.In addition,, because its control system is quite complicated, cause supplementary costs to increase.Thereby this stepless speed variator (CVT) at present can only be for low discharge capacity vehicle.Therefore, how to develop a kind of simple in structure, low cost of manufacture, cheap, function admirable, the high stepless speed variator of safe and reliable transmission efficiency again, just become machinery industry urgent problem for many years.
Summary of the invention
The technical problems to be solved in the utility model overcomes above-mentioned the deficiencies in the prior art exactly, and provide a kind of simple in structure, low cost of manufacture, velocity ratio is continuous and bearing capacity is large, transmission efficiency is high, safe and reliable, again long service life, can automatically adjust moment of torsion according to load variations in the course of the work, realize the hydraulic transmission automatic control stepless speed changer of stepless change running.
For solving the problems of the technologies described above, the technical solution of the utility model is:
A kind of hydraulic transmission automatic control stepless speed changer, comprise casing, be arranged on transmission assembly and free wheel device and transmission assembly braking device in casing, described transmission assembly comprises inner casing, be arranged on inner casing two ends and be positioned at transmission input shaft and the output shaft on same axis, and this input shaft and output shaft end stretch out from casing two ends respectively, in inner casing, be provided with bidirectional hydraulic variable displacement pump simultaneously, constant displacement hydraulic motor, Variable Control drive unit and control system, wherein bidirectional hydraulic variable displacement pump and constant displacement hydraulic motor are for being installed in series, bidirectional hydraulic variable displacement pump and constant displacement hydraulic motor and two oil ducts that are communicated with thereof form closed-loop paths, a hydraulic fluid port of bidirectional hydraulic variable displacement pump is connected with another hydraulic fluid port of bidirectional variable oil hydraulic pump by the first hydraulic buttery valve, another hydraulic fluid port of bidirectional hydraulic variable displacement pump is connected with another hydraulic fluid port of constant displacement hydraulic motor by filter, on two oil ducts of connection bidirectional hydraulic variable displacement pump and constant displacement hydraulic motor, be respectively connected with a buffer cavity, simultaneously between hydraulic fluid port and a hydraulic fluid port of fixed displacement motor of bidirectional hydraulic variable displacement pump, the second hydraulic buttery valve is installed, being used for controlling speed change assembly is in speed change state or overall operation state.Described first, second solenoid valve is all electrically connected to control system, the input shaft of described bidirectional hydraulic variable displacement pump is the input shaft of speed changer, the output shaft of constant displacement hydraulic motor is the output shaft of speed changer, Variable Control drive unit is arranged in the pump housing of two-way variable displacement pump, between the inner casing of transmission assembly and casing, described free wheel device and transmission assembly braking device is installed.
Described Variable Control drive unit comprises the Variable Control drive screw being fixedly mounted in the bidirectional hydraulic variable displacement pump pump housing, be sleeved on the Variable Control swivel nut of Variable Control drive screw outside, be fixedly set in the Variable Control worm gear of Variable Control swivel nut outside, the Variable Control worm screw coordinating with Variable Control worm drive, and with the direct-connected variable drive motor of Variable Control worm screw.
Described transmission assembly braking device comprises the transmission assembly clamping strap being arranged between output shaft side casing and inner casing, clamping strap one end is fixed on casing, the clamping strap the other end is installed with braking sleeve, be connected with brake screw with braking sleeve threads turn, brake screw end is direct-connected braking motor, also comprise that fixed cover is loaded on the rotating disk of the magnet carrier of input shaft on shaft part between casing and inner casing, and be arranged on the speed probe relative with disk edge on casing.
Described control system comprises the control circuit board being arranged in inner casing, and this control circuit board passes through the corresponding connection of wire by slip ring, brush and four tenminal blocks with four tenminal blocks of outside handle controller.
Described casing and inner casing are cylinder shell.
Described first, second hydraulic buttery valve is and changes down soon pass type hydraulic buttery valve.
Described bidirectional hydraulic variable displacement pump and constant displacement hydraulic motor are respectively shaft orientation plunger variable pump and axial piston motor.
Working principle of the present utility model is:
The utility model is to utilize bidirectional variable oil hydraulic pump energy variable output hydraulic pressure oil mass and the variable function of hydraulic oil outbound course, drives oil hydraulic motor to turn round and reaches the object that regulates its rotating speed, moment of torsion and rotation direction.On this basis, adopt new textural association and new control mode, by hydraulic variable displacement pump, oil hydraulic motor, oil duct, filter, buffer cavity, hydraulic buttery valve, the parts such as the subelement of Variable Control drive unit and control hydraulic buttery valve and Variable Control drive unit and power supply line thereof are arranged in inner casing, hydraulic variable displacement pump, oil hydraulic motor adopts the mode being installed in series, the input shaft of hydraulic variable displacement pump, also be the input shaft of speed changer simultaneously, the output shaft of oil hydraulic motor, also be the output shaft of speed changer simultaneously, the input shaft of hydraulic variable displacement pump and the output shaft of oil hydraulic motor are arranged on same axis, the center of gravity of transmission assembly is on the axis of input shaft and output shaft, between the inner casing of transmission assembly and casing, free wheel device is installed.Control system is according to the rotating speed of the input shaft of speed changer, export corresponding control signal, the action of controlled variable accessory drive, change the output oil mass of hydraulic variable displacement pump, thereby change output speed and the moment of torsion of oil hydraulic motor, at transmission assembly, complete after speed-change process, control system output control signal, the hydraulic buttery valve being connected between variable displacement pump and oil hydraulic motor is slowly turn-offed, because solenoid valve is to the damping of hydraulic oil and shutoff effect, impel two-way variable displacement pump and oil hydraulic motor with and the transmission assembly that formed such as control section, carry out integral body in the same way, running with angular velocity, to improve the transmission efficiency of speed changer, make it in maximum output torque, can also export maximum speed, thereby complete reliably hydraulic pressure automatic stepless speed change function.
The beneficial effect of technical solutions of the utility model is:
1, structurally, the utility model hydraulic transmission automatic control stepless speed changer is on the basis of existing hydraulic transmission speed changer, utilize the mature technology of bidirectional hydraulic variable displacement pump and oil hydraulic motor, the structure of former hydraulic pressure transmission speed variator is redesigned, make its structure compacter, control system is more simple and reliable, make transmission assembly in speed changer after completing speed change (being that output speed reaches input speed), each constituent element energy integral body of transmission assembly in the same way, running with angular velocity, make output speed, it is maximum that moment of torsion and power reach, the optimum state, significantly improved the transmission efficiency of speed changer, and overall structure is simple, compact, manufacture cost significantly reduces.
2, structurally, the utility model is because saved contained fluid torque converter and the friction clutcch of conventional hydraulic transmission speed variator, noise is low, and heating is few, and transmission oil is not perishable, kinetic equation loss is low, rotational efficienty is high, and long service life, since the while is such, also reduced manufacture cost, and maintenance, maintenance expenses are also low; Inner casing in described transmission assembly is a barrel-shaped housing, is used for installing the parts such as oil hydraulic pump, oil hydraulic motor, hydraulic buttery valve, control gear.
3, structurally, the oil circuit of transmission assembly described in the utility model is the closed-loop path of sealing, and on oil circuit, being provided with buffer cavity, while turning round to slow down oil hydraulic pump, the high pressure oil pulse of generation and transmission assembly make the thermal expansion of hydraulic oil intensification generation in speed-change process; Hydraulic buttery valve in described transmission assembly is for changing down soon the hydraulic buttery valve of pass type, with buffering hydraulic transmission system, changes because of working condition or load, and the significantly variation of hydraulic fluid pressure in the hydraulic system causing.
4, to sum up, the utility model hydraulic transmission automatic control stepless speed changer is simple in structure, compact, low cost of manufacture, velocity ratio is continuous and bearing capacity is large, transmission efficiency is high, safe and reliable, long service life again, can automatically adjust moment of torsion according to load variations in the course of the work, realize stepless change running, thoroughly solved machinery industry urgent problem for many years, and, the utility model also contributes to improve automotive performance, reduce fuel consume, be conducive to environmental protection, meet the demand for development of country to energy-conserving and environment-protective, economic benefit, social benefit is remarkable, therefore, be very suitable for promotion and implementation.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail, wherein:
Fig. 1 is the structural representation of the utility model hydraulic transmission automatic control stepless speed changer;
Fig. 2 is the structural representation of the contained hydraulic bidirectional variable displacement pump of the utility model hydraulic transmission automatic control stepless speed changer;
Fig. 3 is the structural representation of the contained oil hydraulic motor of the utility model hydraulic transmission automatic control stepless speed changer;
Fig. 4 is the A-A sectional structure schematic diagram of hydraulic transmission automatic control stepless speed changer shown in Fig. 1;
Fig. 5 is the B-B sectional structure schematic diagram of hydraulic transmission automatic control stepless speed changer shown in Fig. 1;
Fig. 6 is the hydraulic system principle figure of the utility model hydraulic transmission automatic control stepless speed changer;
Fig. 7 is the circuit control system schematic diagram of the utility model hydraulic transmission automatic control stepless speed changer;
Fig. 8 is the wiring diagram of the circuit control system of the utility model hydraulic transmission automatic control stepless speed changer;
Sequence number in figure: 1, casing, 2, inner casing, 3, input shaft, 4, output shaft, 5, bidirectional hydraulic variable displacement pump, 6, constant displacement hydraulic motor, 7, oil duct, 8, filter, 9, buffer cavity, 10-a, the first hydraulic buttery valve, 10-b, the second hydraulic buttery valve, 11, Variable Control drive screw, 12, Variable Control swivel nut, 13, Variable Control worm gear, 14, Variable Control worm screw, 15, variable drive motor, 16, free wheel device, 17, slip ring, 18, brush, 19, speed probe (Hall element), 20, magnet carrier rotating disk, 21, speed change assembly clamping strap, 22, brake screw, 23, screw sleeve, 24, braking motor, 25-A, 25-B, 25-C, 25-D, hydraulic fluid port, KZ, control circuit board.
embodiment
Embodiment one:
Referring to Fig. 1 to Fig. 8, in figure, the utility model hydraulic transmission automatic control stepless speed changer, comprise casing 1, be arranged on transmission assembly and free wheel device 12 in casing 1, transmission assembly comprises inner casing 2, input shaft 3, output shaft 4, bidirectional hydraulic variable displacement pump 5, constant displacement hydraulic motor 6, oil duct 7, filter 8, buffer cavity 9, first, the second hydraulic buttery valve 10-a, 10-b, Variable Control drive screw 11, Variable Control swivel nut 12, Variable Control worm gear 13, Variable Control worm screw 14, variable drive motor 15, free wheel device 16, slip ring 17, brush 18, rotating disk (magnet carrier) 20 parts such as grade.Two-way variable displacement pump 5, fixed displacement motor 6 adopt the mode being installed in series, be arranged on 2 li of inner casings, the input shaft of two-way variable displacement pump and the output shaft of fixed displacement motor are arranged on same axis, the input shaft of hydraulic variable displacement pump, also be the input shaft of speed changer, the output shaft of oil hydraulic motor is also the output shaft of speed changer simultaneously simultaneously, the center of gravity of transmission assembly, on the axis of input shaft and output shaft, is provided with free wheel device 16 between the inner casing 2 of transmission assembly and casing 1.A hydraulic fluid port 25-A of two-way variable displacement pump is connected with a hydraulic fluid port 25-C of fixed displacement motor by hydraulic buttery valve 10-b, and another hydraulic fluid port 25-B of two-way variable displacement pump is connected with another hydraulic fluid port 25-D of fixed displacement motor by filter 8.On two oil ducts 7 of connection two-way variable displacement pump and fixed displacement motor, be respectively connected with a buffer cavity 9.Variable Control drive screw 11, Variable Control swivel nut 12, Variable Control worm gear 13, Variable Control worm screw 14 and variable drive motor are all arranged in the pump housing of two-way variable displacement pump, their working state is subject to the control of its control circuit, by them, controls the oil drain quantity of bidirectional hydraulic variable displacement pump 5 and the commutation of oil extraction.The first hydraulic buttery valve 10-a is arranged on the pump housing of bidirectional hydraulic variable displacement pump 5, by control system, according to the working condition of transmission system, controls the open and close of the first hydraulic buttery valve 10-a, and its effect is equivalent to clutch.The second hydraulic buttery valve 10-b is also controlled by control system, by control system, according to the working condition of transmission system, controls the open and close of the second hydraulic buttery valve 10-b, thereby control transmission assembly, is in speed change state or overall operation state.The controlled system of hydraulic bidirectional variable displacement pump 5 is controlled, and control to the hydraulic pressure oil mass of fixed displacement motor 6 conveyings by the second hydraulic buttery valve 10-b, change the output speed of fixed displacement motor 6, output torque, and change the fuel feeding direction to fixed displacement motor 6, thereby change the rotation direction of the output shaft of fixed displacement motor 6.Free wheel device 16 and speed change assembly clamping strap 21, brake screw 22, screw sleeve 23, braking motor 24, speed probe 19 etc. are installed between the inner casing of transmission assembly and casing.The control circuit KZ of speed changer is arranged in inner casing, by slip ring 17, brush 18, tenminal block A, B, C, D, passes through the corresponding connection of wire with tenminal block A, B, C, the D of handle controller.The corresponding relation of the gear of tenminal block A, B, C, D and the handle controller of handle controller is: terminal A is P shelves; Terminal B is R shelves; Terminal C is N shelves; Terminal D is D shelves.
Specific works process of the present utility model is as follows:
Referring to Fig. 1 to Fig. 8, when vehicle need to travel, ato unit running, because engine output shaft is connected with transmission input shaft 3, , power drives two-way variable displacement pump 5 runnings by input shaft 3, because Joystick is initial, in P(, stop) gear, connect with the position limit switch K8 normally opened contact of P gear interlock, power supply is by terminal A, slip ring H1, D1 powers to hydraulic buttery valve 10-a, make it in opening state, bypass effect due to hydraulic buttery valve 10-a, no matter the swash plate of two-way variable displacement plunger pump 5 is in any angle, all can not be to oil hydraulic motor 6 transferring power, the effect of hydraulic buttery valve 10-a is equivalent to clutch, now the output shaft 4 of oil hydraulic motor 6 remains static, speed changer is not to main reducing gear outputting power.
If now depress brake petal, Joystick is placed in R (reversing) gear, with the position limit switch K7 of the R gear interlock connection of often making war, power supply passes through K7, terminal B, slip ring H2, D2, K4 powers to hydraulic buttery valve 10-a, first make speed changer in clutch state, simultaneously, power supply passes through K4, D5, to relay J 3 power supplies, J3 adhesive, variable drive motor 15(M1) reversion, by variable, drive worm screw 14, drive variable to drive worm gear 13, Variable Control swivel nut 12 and Variable Control drive screw 11, promote the variable swash plate of Variable plunger pump, oppositely deflection, effect due to position limit switch K4, under the effect of swash plate at driving mechanism, after deflection several angle, disconnect with the K4 of Variable Control drive screw 11 interlocks, variable drive motor 15(M1) power-off stall, power supply is no longer powered to hydraulic buttery valve 10-a by D2, but hydraulic buttery valve 10-a still powers by D1, keep conducting.The residing angle of swash plate now, is equivalent to the angle of the corresponding speed ratio of speed variator reverse gear.Power supply is powered to hydraulic buttery valve 10-b by D18 simultaneously, makes its conducting, and two-way variable displacement pump to fixed displacement motor conveying high-pressure oil, drives oil hydraulic motor running by it.Power supply is powered to J6 by K7, K10 in addition, makes J6 adhesive, and braking motor 24 obtains electric operation, and transmission assembly braking is not turned.Screw sleeve range two ends are provided with position limit switch K9, K10 with the stroke of restriction screw sleeve 23, after K10 disconnects, effect due to C7, R13, can make J6 continue adhesive a period of time, guarantee that braking motor 24 drives brake screw 22, screw sleeve 23 that clamping strap is braked speed change assembly reliably.Now lift brake petal, K1 disconnects, and hydraulic buttery valve 10-a dead electricity is turn-offed gradually, and vehicle starts backward going.When reversing completes while need stopping, step on brake petal, power supply is powered to hydraulic buttery valve 10-a by the normally closed point of K5, K1 stroke terminal A, D1, and speed changer is in clutch state, vehicle stop.
When Joystick is placed in N(neutral gear) gear, with the position limit switch K6 of the N gear interlock connection of often making war, power supply is powered to hydraulic buttery valve 10-a by K6, terminal C, slip ring H3, D3, and it must be conducted, and speed changer is in clutch state.Power supply makes VT2 conducting by K6, terminal C, position limit switch K2, D13, D14 in addition, J2 adhesive, variable drive motor 15(M1) obtain electric forward, when the inclined-plane of the swash plate of two-way variable displacement pump 5 arrives the position (meta) perpendicular to input shaft axis, with Variable Control drive screw 11, the position limit switch K2 of interlock disconnects, variable drive motor 15(M1) stop operating, now bidirectional hydraulic variable displacement pump 5 is not outwards exported oil mass and oil pressure, is equivalent to neutral position.
When depressing brake petal, K1 connects, and J7 adhesive is often made war closedly, and normally closed point disconnects, power supply by J7 often battle, K1, terminal A, slip ring H1 to be added to hydraulic buttery valve 10-a upper, impel it to open conducting.Joystick is placed in D(driving) gear, with the position limit switch K5 of D gear interlock connections of often making war, normally closed point disconnects, and power supply is added on the normally closed point of J7 by normal battle of K5, and when lifting brake petal, K1 disconnects, J7 discharges, and it is normally closed closed, normal disconnection battle.After K1 disconnects, hydraulic buttery valve 10-a dead electricity is turn-offed gradually.J7 is normally closed closed, power supply is leaded up to terminal D, slip ring H4 and be added to main control circuit (KZ, the right main circuit part in Fig. 7), makes it obtain electric starting working; The K9 of separately leading up to makes J5 obtain electric adhesive, drives braking motor 24(M2) running, clamping strap 21 is decontroled and resetted.At this moment speed probe 19(U1, hall device) receive by being arranged on rotating disk 20(on input shaft 3 with magnet) tach signal, by the normally closed point of centrifugal switch K0, deliver to C2, R5 two ends, through C2, R5 shaping filter, at C2 two ends, form signal voltage, this voltage is delivered to VT1 through R4 and is further amplified processing, tach signal after amplification is exported from VT1 emitter, after D6 delivers to R6, C3 shaping filter, one tunnel adds to 3 pin of comparator U3, one tunnel adds to 5 pin of U3, and by R7, C4, adds to 6 pin of U3.Effect due to R7, C4, make the signal voltage of 6 pin of U3 lower than 5 pin of U3, the 7 pin output high level of U3, by D12, R12, make VT2 conducting, make J2 adhesive, drive variable drive motor 15(M1) by variable, drive worm screw 14, drive variable worm gear 13, Variable Control swivel nut 12 and Variable Control drive screw 11, the variable swash plate positive deflection of promotion Variable plunger pump 5.Tach signal voltage is added to again 2 pin, 6 pin of U4 simultaneously, effect due to C5, the 3 pin output high level that the voltage starting stage at its two ends is less than 1/3rd supply voltage U4 make J1 adhesive, to J2, VT2, J3, VT3 power supply, also at this moment bidirectional hydraulic variable displacement pump 5 is oily to oil hydraulic motor conveying high-pressure by hydraulic buttery valve 10-b by D17, to hydraulic buttery valve 10-b power supply, to make it open conducting, the running of driving oil hydraulic motor, free wheel device stops inner casing reversion, oil hydraulic motor 6 to automobile main reducer transferring power, drives Vehicle Driving Cycle by output shaft 4.If now depress gas pedal, be added to throttle, engine speed improves, and rotating disk 20 rotating speeds that also make to be arranged on input shaft 3 increase simultaneously, and the tach signal of U1 output strengthens, increase frequency.The signal voltage of VT1 output raises, effect due to R7, C4,5 pin of comparator U3 are still high than the 6 pin voltages of U3,7 pin continue output high level, continue to drive variable drive motor 15(M1) by variable, drive worm screw 14, worm gear 13, swivel nut 12, variable screw rod 11, promote the variable swash plate positive deflection of Variable plunger pump 5, the output oil mass of variable displacement pump 5 is increased, the rotating speed of oil hydraulic motor improves.More than engine speed reaches 1500 revs/min (vehicle difference arranges difference to some extent), more than the speed of a motor vehicle reaches 50,000 ms/h (vehicle difference arranges difference to some extent), the tach signal of at this moment speed probe 19 outputs is stronger, the voltage of VT1 output is higher, make 2 pin of U4, the voltage of 6 pin surpasses 2/3 supply voltage, the 3 pin output low levels of U4, J1 discharges, VT2, J2 dead electricity discharges, variable drive motor 15(M1) power-off stops operating, hydraulic buttery valve 10-b also dead electricity closes gradually, at this moment the input speed of speed changer equals output speed, due to closing of hydraulic buttery valve 10-b, cause the power of high pressure oil to pass to oil hydraulic motor by hydraulic buttery valve 10-b, hydraulic variable displacement pump 5, between oil hydraulic motor 6 each parts, no longer produce relative movement, power is by hydraulic variable displacement pump input shaft---the hydraulic variable displacement pump pump housing---inner casing---oil hydraulic motor pump housing---output shaft, pass to the main reducing gear of automobile, at this moment, the all parts of speed change assembly carries out in the same way, with angular velocity ground overall operation, free wheel device is also decontroled the effect of clamping down on to speed change assembly.Meanwhile, be arranged on the effect that the centrifugal switch K0 in inner casing 2 is subject to inner casing to rotate the centrifugal force producing, normally closed point is disconnected, the normal closure of making war, speed probe 19(U2) obtain electric work, with the magnet being arranged on casing 1, produce relativity, to main control circuit, carry tach signal.Now speed changer completes speed-change process, normal vehicle operation substantially.
If vehicle needs to slow down, lift gas pedal, depress brake petal, the speed of a motor vehicle reduces, engine speed also reduces, transmission assembly still keeps overall operation state, when the speed of a motor vehicle is reduced to approximately 40,000 ms/h (vehicle difference arranges difference to some extent), the rotating speed of motor is during lower than 800 revs/min (vehicle difference arranges difference to some extent), at this moment, the tach signal of speed probe U2 output is lower, lower than 1/3 supply voltage, U4 exports high level, J1 adhesive, power supply, to J2, VT2, J3, VT3 power supply, must conduct hydraulic buttery valve 10-b by D17.The voltage of 3 pin of comparator U3 is lower than 2 pin, 1 pin output low level, and VT4 conducting J4 adhesive, must conduct hydraulic buttery valve 10-a, by high pressure oil bypass, stops, to oil hydraulic motor conveying high-pressure oil, for stopping, preparing, the 5 pin voltages of comparator U3 are lower than 6 pin, 7 pin are output low level also, VT3 conducting, J3 adhesive, power source driving variable drive motor 15(M1) running, by variable, drive worm screw 14, worm gear 13, swivel nut 12, variable screw rod 11, promote the reverse deflection of variable swash plate of Variable plunger pump 5, adjust the velocity ratio of the input shaft of variable displacement pump 5 and the output shaft of oil hydraulic motor 6, when the speed of a motor vehicle continues to reduce, the 5 pin voltages of comparator U3 continue lower than 6 pin, 7 pin are output low level still, the variable swash plate of variable displacement pump 5 continues deflection in the other direction, until the inclined-plane of swash plate is perpendicular to the axis (meta) of input shaft 3, disconnect with the position limit switch K3 of variable screw rod interlock, 15 power-off of variable drive motor shut down, now, transmission assembly also exits overall operation state, free wheel device recovers again the effect of clamping down on to transmission assembly.If continue, depress brake petal, automobile will stop travelling, and Joystick pushes back P(and stops) gear, speed changer completes a work cycle.
The foregoing is only the schematic embodiment of the utility model, not in order to limit scope of the present utility model, any those skilled in the art is not departing from equivalent variations and the modification of making under the prerequisite of the utility model design and principle, such as described bidirectional hydraulic variable displacement pump and constant displacement hydraulic motor, be not limited to the shaft orientation plunger variable pump and the axial piston motor that in embodiment, adopt, all hydraulic variable displacement pumps of the prior art and oil hydraulic motor, as long as by adopting suitable control mode, all be applicable to this hydraulic transmission automatic control stepless speed changer, the scope that all should belong to the utility model protection.
Claims (8)
1. a hydraulic transmission automatic control stepless speed changer, comprise casing, be arranged on transmission assembly and free wheel device and transmission assembly braking device in casing, it is characterized in that: described transmission assembly comprises inner casing, be arranged on inner casing two ends and be positioned at transmission input shaft and the output shaft on same axis, and this input shaft and output shaft end stretch out from casing two ends respectively, in inner casing, be provided with bidirectional hydraulic variable displacement pump simultaneously, constant displacement hydraulic motor, Variable Control drive unit and control system, wherein bidirectional hydraulic variable displacement pump and constant displacement hydraulic motor are for being installed in series, bidirectional hydraulic variable displacement pump and constant displacement hydraulic motor and two oil ducts that are communicated with thereof form closed-loop paths, a hydraulic fluid port of bidirectional hydraulic variable displacement pump is connected with another hydraulic fluid port of bidirectional hydraulic variable displacement pump by the first hydraulic buttery valve, another hydraulic fluid port of bidirectional hydraulic variable displacement pump is connected with another hydraulic fluid port of constant displacement hydraulic motor by filter, on two oil ducts of connection bidirectional hydraulic variable displacement pump and constant displacement hydraulic motor, be respectively connected with a buffer cavity, simultaneously between hydraulic fluid port of bidirectional hydraulic variable displacement pump and a hydraulic fluid port of constant displacement hydraulic motor, the second hydraulic buttery valve is installed, being used for controlling speed change assembly is in speed change state or overall operation state, described first, the second solenoid valve is all electrically connected to control system, the input shaft of described bidirectional hydraulic variable displacement pump is the input shaft of speed changer, the output shaft of constant displacement hydraulic motor is the output shaft of speed changer, Variable Control drive unit is arranged in the pump housing of two-way variable displacement pump, between the inner casing of transmission assembly and casing, described free wheel device and transmission assembly braking device are installed.
2. hydraulic transmission automatic control stepless speed changer according to claim 1, it is characterized in that: described Variable Control drive unit comprises the Variable Control drive screw being fixedly mounted in the bidirectional hydraulic variable displacement pump pump housing, be sleeved on the Variable Control swivel nut of Variable Control drive screw outside, be fixedly set in the Variable Control worm gear of Variable Control swivel nut outside, the Variable Control worm screw coordinating with Variable Control worm drive, and with the direct-connected variable drive motor of Variable Control worm screw.
3. hydraulic transmission automatic control stepless speed changer according to claim 1, it is characterized in that: described transmission assembly braking device comprises the transmission assembly clamping strap being arranged between output shaft side casing and inner casing, clamping strap one end is fixed on casing, the clamping strap the other end is installed with braking sleeve, be connected with brake screw with braking sleeve threads turn, brake screw end is direct-connected braking motor, also comprise that fixed cover is loaded on the rotating disk of the magnet carrier of input shaft on shaft part between casing and inner casing, and be arranged on the speed probe relative with disk edge on casing.
4. hydraulic transmission automatic control stepless speed changer according to claim 1, it is characterized in that: described control system comprises the control circuit board being arranged in inner casing, this control circuit board passes through the corresponding connection of wire by slip ring, brush and four tenminal blocks with four tenminal blocks of outside handle controller.
5. hydraulic transmission automatic control stepless speed changer according to claim 1, is characterized in that: described casing and inner casing are cylinder shell.
6. hydraulic transmission automatic control stepless speed changer according to claim 1, is characterized in that: described first, second hydraulic buttery valve is and changes down soon pass type hydraulic buttery valve.
7. hydraulic transmission automatic control stepless speed changer according to claim 1, is characterized in that: described bidirectional hydraulic variable displacement pump and constant displacement hydraulic motor are respectively shaft orientation plunger variable pump and axial piston motor.
8. hydraulic transmission automatic control stepless speed changer according to claim 1, is characterized in that: the center of gravity of described transmission assembly is on the axis of input shaft, output shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420069589.6U CN203730684U (en) | 2014-02-18 | 2014-02-18 | Hydraulic transmission automatic control continuously variable transmission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420069589.6U CN203730684U (en) | 2014-02-18 | 2014-02-18 | Hydraulic transmission automatic control continuously variable transmission |
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| CN203730684U true CN203730684U (en) | 2014-07-23 |
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|---|---|---|---|
| CN201420069589.6U Withdrawn - After Issue CN203730684U (en) | 2014-02-18 | 2014-02-18 | Hydraulic transmission automatic control continuously variable transmission |
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| CN103867681A (en) * | 2014-02-18 | 2014-06-18 | 王俊生 | Hydraulic transmission and automatic control stepless speed regulator |
| CN105773826A (en) * | 2016-03-15 | 2016-07-20 | 安庆市达东电子科技有限公司 | Module for preventing idling of oil pump of hydraulic demoulding machine |
| CN107631025A (en) * | 2017-09-29 | 2018-01-26 | 湖南江麓容大车辆传动股份有限公司 | A kind of gear shifting actuating mechanism of self-changing gearbox and the automatic transmission with the mechanism |
| CN109256884A (en) * | 2017-10-13 | 2019-01-22 | 朱卫 | A kind of motor case produced with titanium |
| CN117977872A (en) * | 2024-04-01 | 2024-05-03 | 西北工业大学 | Variable-speed combined underwater contra-rotating propulsion motor, control method thereof and underwater equipment |
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2014
- 2014-02-18 CN CN201420069589.6U patent/CN203730684U/en not_active Withdrawn - After Issue
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| CN103867681A (en) * | 2014-02-18 | 2014-06-18 | 王俊生 | Hydraulic transmission and automatic control stepless speed regulator |
| CN103867681B (en) * | 2014-02-18 | 2016-06-29 | 王俊生 | Hydraulic drive automatic control stepless speed changer |
| CN105773826A (en) * | 2016-03-15 | 2016-07-20 | 安庆市达东电子科技有限公司 | Module for preventing idling of oil pump of hydraulic demoulding machine |
| CN107631025A (en) * | 2017-09-29 | 2018-01-26 | 湖南江麓容大车辆传动股份有限公司 | A kind of gear shifting actuating mechanism of self-changing gearbox and the automatic transmission with the mechanism |
| CN109256884A (en) * | 2017-10-13 | 2019-01-22 | 朱卫 | A kind of motor case produced with titanium |
| CN117977872A (en) * | 2024-04-01 | 2024-05-03 | 西北工业大学 | Variable-speed combined underwater contra-rotating propulsion motor, control method thereof and underwater equipment |
| CN117977872B (en) * | 2024-04-01 | 2024-06-04 | 西北工业大学 | Variable-speed combined underwater contra-rotating propulsion motor, control method thereof and underwater equipment |
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