CN2052730U

CN2052730U - Hydraulic driving device for bus

Info

Publication number: CN2052730U
Application number: CN 89215032
Authority: CN
Inventors: 罗邦杰; 吴淑荣; 马文星; 华锡兴; 张斌
Original assignee: Jilin University of Technology
Current assignee: Jilin University of Technology
Priority date: 1989-08-11
Filing date: 1989-08-11
Publication date: 1990-02-14

Abstract

The utility model relates to a new hydraulic driving device for a bus, comprising a reversible hydrodynamic torque converter with three phase and four element guide pulleys which is connected in series to a power shifting gear box with a dead axle backwards and forwards. The utility model has the advantages of automatic adaptability, stepless speed change, motor protection, shock resistance and prolonged service life of transmission parts, motors and tyres; the motive power scope is larger than the motive power scope of a pure mechanical gear box; the new hydraulic driving device for a bus can greatly improve the dynamic performance, acceleration and average speed of the whole bus. The simple operation can reduce the labour intensity of drivers; the small axial dimension is convenient for installation; the riding comfort of the bus is improved.

Description

Hydraulic driving device for bus

The utility model relates to a kind of city motor bus power drive.

The manipulation complexity of the mechanical gearbox that existing city motor bus adopted is frequently stopped for need, and starting and the city motor bus (particularly bus city-bus) that quickens are just more outstanding, because the necessary buty shifting of driver, so labour intensity is very big.Be the positive drive of step change because of mechanical gearbox in addition, can not reduce vibration and impact, thus the life-span of transmission system parts and driving engine be difficult to improve, and travelling comfort is poor.

The purpose of this utility model is to provide a kind of car load dynamic property, economy, manipulation of improving simple, makes the good S. A. hydraulic transmission system of travelling comfort.

The utility model is made up of the two large divisions, first three-phase, the reversible turbine transformer of quaternary part guide wheel; It two is dead axle Powershift transmissions, series connection before and after these two parts.

But in three-phase, quaternary part guide wheel backward running torque converter, lock-up clutch 81 is loaded between engine flywheel 8 and the turbine 11, bearing plate 10 connects firmly with the outer rim of pump impeller 14 and lock-up clutch shell 5, lock-up clutch 5 is connected in engine flywheel 8 by elastic plate 4, and be equipped with can axially movable piston 6 in its inside.Friction lining 7 places between piston 6 and the bearing plate 10, and links to each other with turbine 11 through wheel hub.The inner edge of pump impeller 14 is anchored on

pump impeller seat

73, and 73 of pump impeller seats are supported on by bearing 75 and connect firmly on the wheel stand 76 of housing 72.Turbine 11 links to each other with the wheel hub 80 that is connected in by spline on the turbo-shaft 2.First guide wheel 12 is contained on the free gear 79, and second guide wheel 13 is connected on the wheel stand 76 by free gear 77.Between free gear 77 and the free gear 79 bearing 78 is housed, the inner ring of free gear 79 is fixed on hollow shaft 74, gear of hollow shaft 74 right-hand members 82 and gear 53 engagements, gear 50 and gear 69 engagements, gear 69 again with turbo-shaft 2 on gear 16 engagements.

When working oil pressure acted on the piston 6, piston 6 moved axially, and friction lining 7 was pressed on the bearing plate 10, at this moment torque converter locking.When driving engine drives pump impeller 14 rotations, with pump impeller seat 73 be that the gear driven oil pump of one is worked, providing in the tor-con torus, the pressure oil that lock-up clutch 81 and reverse clutch 21, low regime clutch 62 and high range overdrive gear power-transfer clutch 68 are required.The pressure oil that comes out from oil pump enters wheel stand 76 through housing 72, and the space between bearing 75 and the pump impeller 14 and second guide wheel 13 enters the runner of pump impeller 14 again; Fuel-displaced then is through the gap between the turbine 11 and first guide wheel 12, flows back to oil pan tray 49 by the gap between turbo-shaft 2 and the hollow shaft 74 again.The oil-feed route of lock-up clutch 81 is: the pressure oil from oil pump comes out, enter end cap 33 through pipeline, and again through the centre hole of reverse gear shaft 39 and turbo-shaft 2, enter the epitrochoidal chamber between lock-up clutch shell 5 and the piston 6 at last, make it locking; When not needing locking, the valve transposition, the pressure oil between lock-up clutch shell 5 and the piston 6 flows back to oil pan tray 49.

In the dead axle Powershift transmission, reverse gear shaft 39 is positioned at housing 19 internal upper parts, and output shaft 45 is positioned at housing 19 bottoms, and high range overdrive gear axle 70 is positioned at housing 19 1 sides, and low-grade axle 64 is positioned at housing 19 opposite sides.

Reverse gear shaft 39 connects firmly with clutch outer member 17, gear 16, and its two ends are by bearing 15,34 supportings, and clutch outer member 17 is connected with turbo-shaft 2, and reverse gearwheel 31 is an one with reverse clutch 21 interior hubs, is supported on the reverse gear shaft 39 by needle bearing 29,32; High range overdrive gear axle 70 is by bearing 66,71 supportings, and gear 69 on it and the gear 16 on the reverse gear shaft 39, the gear on the output shaft 45 50 mesh, gear 40 engagements on high range overdrive gear gear 67 and the output shaft 45; Low-grade axle 64 is supported on the housing 19 gear 63 and gear 16 engagements, gear 61 and gear 41 engagements by bearing 60,65; Output shaft 45 is supported on the housing 19 by bearing 42,56, and its right-hand member connects firmly

gear

40,41, and left end is the

gear

50,53 of needle bearing 52,55 supportings.Mileage meter 43 is housed in the output shaft end cap 48.

Gear 69 is public by tor-con and change speed gear box, and gear 69 is to realize that high range overdrive gear institute is necessary, constitutes the guide wheel counter gear mechanism with

gear

50,16,53,82 again simultaneously.

Principle of work of the present utility model is described below: (see figure 5) is in starting or stall operating mode, engine crankshaft 1 drives pump impeller 14 rotations, liquid in the periodical duty chamber obtains energy from pump impeller 14, and enter turbine 11, enter first guide wheel 12 subsequently, after second guide wheel 13 returns pump impeller 14, at this moment, the rotating speed of the turbine 11 and first guide wheel 12 is zero, but its output torque maximum.The moment of torsion that the moment of torsion of turbine 11 is passed to turbo-shaft 2, the first guide wheels 12 meets at turbo-shaft 2 through

gear

82,53,50,69.Under this operating mode, the torque ratio maximum.Low speed than scope in, along with the speed ratio increase of starting from scratch, turbine 11 beginning is with the direction rotation identical with pump impeller 14, and then beginning is with the direction rotation opposite with pump impeller 14 for first guide wheel 12, and its moment of torsion converges through the moment of torsion of

gear

82,53,50,69 and turbine 11 equally.Under this operating mode, second guide wheel 13 maintains static.When speed ratio is increased to a certain value, liquid stream acts on the moment of torsion vanishing of first guide wheel 12, free gear 79 is thrown off, thereby first guide wheel 12 no longer reverse, but with the turn to idle running identical with pump impeller 14, promptly deactivate, at this moment tor-con has only pump impeller 14, turbine 11, second to take turns 13 work, is similar to the three element tor-con.When speed ratio further was increased to a certain particular value, second guide wheel 13 was also thrown off, and deactivates, and the work of whole tor-con enters the impeller disk operating mode.When not needing tor-con work, in conjunction with lock-up clutch 81, the then whole rotation of four impellers of tor-con, thus become through-coupling.

For the change speed gear box part, can obtain different gears in conjunction with different power-transfer clutchs.Generally speaking,, utilized high range overdrive gear work just in conjunction with high range overdrive gear power-transfer clutch 68, needn't gear shift, but this is because anterior guide wheel backward running torque converter can the stepless change bending moment, is equivalent to a toric transmission.

The utlity model has automatic comformability, continuously variable can be protected driving engine, and vibration shock isolation hits, and is simultaneously greatly prolonged in the life-span of transmission system parts, driving engine and tire, and travelling comfort is improved.Because but the torque ratio of guide wheel backward running torque converter is higher, thus bigger than the dynamic range of pure mechanical gear box, can increase substantially dynamic property, accelerating ability and the average ground speed of car load.The utility model is handled extremely simple, and chaufeur needn't carry out gear-change operation generally speaking, so alleviated the labour intensity of chaufeur significantly.This point is for frequent parking, and the bus city-bus of starting, acceleration is just more apparent superior.The size of the utility model axle is little, is convenient to arrange install, but locks power-transfer clutch owing to being equipped with on the guide wheel backward running torque converter, so can improve driving efficiency.In addition, high range overdrive gear can make driving engine work in low oil consumption district, so the situation of the fuel efficiency of employing city motor bus of the present utility model and pure mechanical gear box is basic identical.

Description of drawings:

Fig. 1 is the novel hydraulic transmission system constructional drawing of city motor bus;

Fig. 2 is the high range overdrive gear constructional drawing;

Fig. 3 is low-grade constructional drawing;

Fig. 4 is a transmission shaft spatial destribution scheme drawing;

Fig. 5 is the novel hydraulic transmission system sketch of city motor bus.

Sequence number among the above-mentioned figure is respectively:

1 engine crankshaft; 2 turbo-shafts; 3 bearings; 4 elastic plates; 5 lock-up clutch shells; 6 pistons; 7 friction linings; 8 engine flywheels; 9 front end shell; 10 bearing plates; 11 turbines; 12 first guide wheels; 13 second guide wheels; 14 pump impellers; 15 bearings; 16 gears; 17 clutch outer members; 18 pistons; 19 housings; 20 friction linings; 21 reverse clutches; 22 bearing plates; 23 hole retainer rings; 24 springs; 25 pads; 26 snap rings; 27 pads; 28 pressure-bearing plates; 29 needle bearings; 30 axle sleeves; 31 reverse gearwheels; 32 needle bearings; 33 end caps; 34 bearings; 35 pressure-bearing plates; 36 pads; 37 snap rings; 38 seal rings; 39 reverse gear shafts; 40 gears; 41 gears; 42 bearings; 43 mileage meters; 44 output flanges; 45 output shafts; 46 pads; 47 clamp nuts; 48 output shaft end caps; 49 oil pan trays; 50 gears; 51 pressure-bearing plates; 52 needle bearings; 53 gears; 54 axle sleeves; 55 needle bearings; 56 bearings; 57 low-grade hubcaps; 58 seal rings; 59 snap rings; 60 bearings; 61 gears; 62 low regime clutch; 63 gears; 64 low-grade axles; 65 bearings; 66 bearings; 67 high range overdrive gear gears; 68 high range overdrive gear power-transfer clutchs; 69 gears; 70 high range overdrive gear axles; 71 bearings; 72 housings; 73 pump impeller seats; 74 hollow shafts; 75 bearings; 76 wheel stands; 77 free gear; 78 bearings; 79 free gear; 80 turbine hubs; 81 lock-ups clutch; 82 gears.

Embodiment:

Guide wheel counter gear group transmitting ratio is-1.967～-2.0;

Each grade of change speed gear box part transmitting ratio is: high range overdrive gear i=0.80, low-grade i=1.75; Reverse gear i=1.916.

Claims

1, a kind of city motor bus hydraulic transmission system of forming by lock-up clutch 81, pump impeller 14, turbine 11, first guide wheel 12, second guide wheel 13, free gear 77,79, hollow shaft 74 turbo-shafts 2, gear 16,50,53,61,63,67,69,82, reverse gear shaft 39, reverse clutch 21, reverse gearwheel 31, high range overdrive gear axle 70, power-transfer clutch 62,68, low-grade axle 64, output shaft 45, but it is characterized in that three-phase, quaternary part guide wheel backward running torque converter connect with dead axle Powershift transmission front and back.

2, by the described city motor bus hydraulic transmission system of claim 1, but it is characterized in that in three-phase, the quaternary part guide wheel backward running torque converter, lock-up clutch 81 is loaded between engine flywheel 8 and the turbine 11, bearing plate 10 connects firmly with the outer rim of pump impeller 14 and lock-up clutch shell 5, lock-up clutch shell 5 is connected in engine flywheel 8 by elastic plate 4, and be equipped with can axially movable piston 6 in its inside.The inner edge of pump impeller 14 is anchored on pump impeller seat 73, and pump impeller seat 73 is supported on by bearing 75 and connects firmly on the wheel stand 76 of housing 72.Turbine 11 links to each other with the wheel hub 80 that is connected in by spline on the turbo-shaft 2.First guide wheel 12 is contained on the free gear 79, and second guide wheel 13 is connected on the wheel stand 76 by free gear 77.Between free gear 77 and the free gear 79 bearing 78 is arranged, the inner ring of free gear 79 is fixed on hollow shaft 74, gear of hollow shaft 74 right-hand members 82 and gear 53 engagements, gear 50 and gear 69 engagements, gear 69 again with turbo-shaft 2 on gear 16 engagements.

3, by the described city motor bus hydraulic transmission system of claim 1, it is characterized in that in the dead axle Powershift transmission that reverse gear shaft 39 is positioned at housing 19 internal upper parts, output shaft 45 is positioned at housing 19 bottoms, high range overdrive gear axle 70 is positioned at housing 19 1 sides, and low-grade axle 64 is positioned at housing 19 opposite sides.

4, by the described city motor bus hydraulic transmission system of claim 3, it is characterized in that reverse gear shaft 39 and clutch outer member 17, gear 16 connect firmly, its two ends are by bearing 15,34 supportings, and clutch outer member 17 is connected with turbo-shaft 2; Reverse gearwheel 31 is an one with reverse clutch 21 interior hubs, is supported on the reverse gear shaft 39 by needle bearing 29,32.High range overdrive gear axle 70 is by bearing 66,71 supportings, and tooth 69 on it and the gear 16 on the reverse gear shaft 39, the gear on the output shaft 45 50 mesh, gear 40 engagements on high range overdrive gear gear 67 and the output shaft 45.Low-grade axle 64 by bearing 60,65 be supported on housing 19, on, gear 63 and gear 16 engagements, gear 61 is supported on the housing 19 by bearing 42,56 with gear 41 engagements, output shaft 45, and its right-hand member connects firmly gear 40,41, and left end is the gear 50,53 of needle bearing 52,55 supportings.

5, by the described city motor bus hydraulic transmission system of claim 2, it is characterized in that friction lining 7 places between piston 6 and the bearing plate 10, and link to each other with turbine 11 through wheel hub.