CN203374749U - Hydraulic transmission box - Google Patents

Hydraulic transmission box Download PDF

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Publication number
CN203374749U
CN203374749U CN201320185843.4U CN201320185843U CN203374749U CN 203374749 U CN203374749 U CN 203374749U CN 201320185843 U CN201320185843 U CN 201320185843U CN 203374749 U CN203374749 U CN 203374749U
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China
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clutch
gear
planet row
torque converter
planetary
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CN201320185843.4U
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Chinese (zh)
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孔照林
杨学军
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Individual
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Abstract

The utility model provides a hydraulic transmission box, comprising a hydrodynamic torque converter and a planetary gearbox. A hydraulic retarder is disposed between the hydrodynamic torque converter and the planetary gearbox. The hydraulic retarder comprises a retarder housing fixedly disposed between the hydrodynamic torque converter and the planetary gearbox, and a retarder impeller disposed in the retarder housing. The retarder impeller is connected to the output shaft of the hydrodynamic torque converter in a splined manner. The hydraulic transmission box is advantageous in that the hydraulic retarder is disposed between the hydrodynamic torque converter and the planetary gearbox, and thereby flexible brake of mining automobiles can be realized, and the impact of mechanical braking to the engine, the transmission system and the mechanical braking system can be reduced, and brake performance is good.

Description

Hydraulic transmission box
Technical field
The utility model relates to the automobile-used speed change gear of engineering machinery, is specifically related to a kind of hydraulic transmission box and method of power transmission thereof.
Background technique
Mine truck is mining trolley, belongs to one of mining equipment, and mine truck, because its car body is roomy, the carrying capacity high, is mainly used in the short distance transportation of ore and other bulk cargo in mine.In recent years, the non-road mining development of automobile of the little tonnage of China (30~60 tons of carrying capacity) is rapid, annual turnover reaches more than 30,000, for evading the deficiency of mechanical gear box starting moment of torsion, the shortcoming that gear is many, Chinese utility model patent CN201944223U discloses a kind of planetary transmission with Multi-functional hydraulic torque converter, it is by a Multi-functional hydraulic torque converter, power gear shifting planetary transmission and one fall the square case and form, described multi-functional torque-converters links by flywheel and motor, described Multi-functional hydraulic torque converter comprises pump impeller, the guide wheel of overrunning clutch is housed, turbine and lockup clutch, described power gear shifting planetary transmission is the Three Degree Of Freedom planetary transmission that has two two degrees of freedom planetary differentials to be in series, it comprises: high transfer planetary gear train, middle-grade planetary gear train, low-grade planetary gear train, reverse gear planetary gear train, low-speed clutch, high-speed brake, high-gear clutch, low-grade break, middle-grade break, reverse gear brake, oil pump, control valve parts, and its structural configuration comprises a concentricity end output or falls the output of square two ends, the described square case that falls is comprised of secondary main transmission and three cut-off clutches.The utility model adopts torque converter casing, transmission housing and falls square case Split type structure, combination by control valve and each sensor, the work fluid of controlling gearbox flows to, thereby make 6 clutches such as low-speed clutch, high-speed brake, high-gear clutch, low-grade break, middle-grade break, reverse gear brake or break in conjunction with or throw off, realize 6 front 1 falling, 5 front 1,3 front 1 the multiple gearshift function such as fall; By full power and the Partial Power coupling of torque-converters and motor, according to complete machine type, driving power and speed of a motor vehicle requirement, choose suitable torque-converters, in the hope of the high efficiency of transmission device; By regulating the characteristic of rationally boosting of control valve parts, reach steadily comfortable gearshift performance; With same power, gearbox of the same type, compare, it have rational in infrastructure, volume is little, lightweight, operation is convenient, the shift quality high, is suitable for the engineering vehicles such as large-tonnage well repairing machine, mobile crane, oil field pump truck.
But mine truck is when bend or descent run, need Reduced Speed Now, because the mine truck total mass ratio is larger, just need to overcome larger inertia when Reduced Speed Now, automobile is lowered travelling speed in the short period of time, and the mine truck that configures the above-mentioned planetary transmission with Multi-functional hydraulic torque converter can only be controlled brake system by the driver, the gearbox shift to low gear of vehicle is travelled, long-time continuous is used and will be caused the rising of brake system temperature, stopping power to descend, thereby the brake failure phenomenon occurs.
The model utility content
The technical problems to be solved in the utility model is to provide a kind of hydraulic transmission box, realizes the flexible braking of mine truck, reduces the impact of mechanical braking to motor, transmission system and mechanical braking sytem, and braking ability is good.
For solving the problems of the technologies described above, embodiment of the present utility model provides a kind of hydraulic transmission box, comprise fluid torque converter and planetary transmission, be provided with the fluid power retarder between described fluid torque converter and planetary transmission, it comprises: be fixedly arranged on retarder housing between described fluid torque converter and planetary transmission, be located at the retarder impeller in this retarder housing, the output shaft spline joint of this retarder impeller and described fluid torque converter.
Wherein, described planetary transmission comprises: be located at the planet row input shaft between the output shaft of the output shaft of described fluid torque converter and hydraulic transmission box, the planetary transmission casing, what with described planetary transmission casing, be connected is connected housing, be provided with epicyclic train, forward gear clutch assembly, five grades of clutch assemblies, fourth gear clutch assembly, third gear clutch assembly, second gear clutch assembly, one grade of clutch assembly, central supporting in described planetary transmission casing, the side of described connection housing is fixed with the output terminal housing;
Wherein, described forward gear clutch assembly comprises: with the forward gear clutch housing of the output shaft spline joint of described fluid torque converter, be slidedly arranged on the forward gear clutch piston in this forward gear clutch housing, inside be engaged in the interior hub of forward gear clutch in the described planet row input shaft outside, be incorporated into the forward gear clutch sheet in the hub outside in this forward gear clutch;
Described epicyclic train comprises: be sheathed on the sun wheel case in the described planet row input shaft outside, front planet row, middle planetary row and rear planet row; Wherein, described front planet package is drawn together: inside be engaged in the front planet row sun gear in the described sun wheel case outside, with the n of described front planet row sun gear outer gearing 1individual front planet rows of planetary wheel, with n 1in individual described front planet rows of planetary wheel, the exclusive gear ring of front planet of engagement, support n 1the front planetary line of individual described front planet rows of planetary wheel;
Described middle planetary package is drawn together: middle planetary rows of planetary frame is connected hub with the exclusive gear ring of described front planet with the planet row meshed in middle planetary rows of planetary frame, with the n of described sun wheel case outer gearing simultaneously 2individual middle planetary seniority among brothers and sisters star-wheel, with n 2the exclusive gear ring of middle planetary of engagement in individual described middle planetary seniority among brothers and sisters star-wheel;
Described rear planet row comprises: inside and outside circle respectively with described planet row input shaft and the exclusive gear ring of middle planetary in the rear planet row second gear sun gear that meshes, with the n of planet row second gear sun gear outer gearing after this 3individual rear planet row second gear planet wheel, with n 3the rear planet row second gear planet external toothing of engagement in individual described rear planet row second gear planet wheel, inside and outside circle respectively with described output shaft and the rear planet row planet carrier meshed in planet row is connected hub, be located at the n on described rear planet row planet carrier 4one grade of planet wheel of the rear planet row of individual and described planet row input shaft outer gearing, with n 4one grade of planet external toothing of rear planet row of engagement in one grade of planet wheel of individual described rear planet row;
Described five grades of clutch assemblies comprise: with five grades of clutch housings that mesh in the outer ring of described sun wheel case, be slidedly arranged on five grades of clutch plungers in these five grades of clutch housings, five grades of clutch drive hub, be incorporated into five grades of clutch plate in this five grades of clutch drive hub outside;
Described fourth gear clutch assembly comprises: be incorporated into the fourth gear clutch plate in described five grades of clutch housings outside, be slidedly arranged on the fourth gear clutch plunger in described central supporting;
Described third gear clutch assembly comprises: be incorporated into the third gear clutch plate in the described front planetary line outside, be slidedly arranged on the third gear clutch plunger in described central supporting;
Described second gear clutch assembly comprises: be incorporated into the second gear clutch plate in the described rear planet row second gear planet external toothing outside, be slidedly arranged on the second gear clutch plunger in described connection housing;
Described one grade of clutch assembly comprises: be incorporated into one grade of clutch plate in one grade of planet external toothing outside of described rear planet row, be slidedly arranged on one grade of clutch plunger in described output terminal housing.
Wherein, described fluid torque converter comprises: the torque converter pump mid-wheel drive wheel be fixedly connected with and pump impeller, be located at turbine and guide wheel in described pump impeller, be sheathed on the torque-converters hub in the output shaft outside of described fluid torque converter, the output shaft spline joint of described turbine and fluid torque converter, described guide wheel is connected with the torque-converters hub by free wheel device.
In technique scheme, be provided with lockup clutch in described fluid torque converter, this lockup clutch comprises that the lockup clutch that is slidedly arranged on the interior lockup clutch piston of described torque converter pump mid-wheel drive wheel, is located at successively this lockup clutch piston side is by moving plate and lockup clutch platen, and described lockup clutch is often meshed by the gear on moving plate and described turbine.
Preferably, described n 1be 6, described n 2, n 3and n 4be 4.
The method of power transmission of above-mentioned hydraulic transmission box, comprise becoming and turn round the method for power transmission in stage and the method for power transmission of gear shift stage;
The method of power transmission that the stage is turned round in described change comprises the steps:
(1) at first, the rotating speed of turbine is during lower than 1800r/min, not oil-filled in the lockup clutch piston cavity, now the power of motor is delivered to pump impeller through the torque converter pump mid-wheel drive wheel and is sent on the output shaft of fluid torque converter through turbine and guide wheel, the transmission of power when completing lockup clutch and not working;
(2) when the rotating speed of turbine during higher than 1800r/min, oil-filled in the lockup clutch piston cavity, the lockup clutch combination, now the power of motor through the torque converter pump mid-wheel drive wheel be delivered to lockup clutch by moving plate on, then through turbine, be sent on the output shaft of fluid torque converter.
Wherein, the method for power transmission of described gear shift stage comprises the steps:
(1) neutral starting: the power of motor is delivered on pump impeller through the torque converter pump mid-wheel drive wheel, impulse turbine after pump impeller accelerates the transmission oil in fluid torque converter, by transmission of power to the output shaft of fluid torque converter, the output shaft of fluid torque converter drives the forward gear clutch housing motion with its spline joint, the forward gear clutch housing by transmission of power on five grades of clutch drive hub with its spline joint;
(2) one grades of power transmission: the power of motor is delivered on pump impeller through the torque converter pump mid-wheel drive wheel, impulse turbine after pump impeller accelerates the transmission oil in fluid torque converter, by transmission of power to the output shaft of fluid torque converter, the output shaft of fluid torque converter drives the forward gear clutch housing motion with its spline joint, when the forward gears electro-hydraulic proportional valve obtains when electric, pressure oil imports in the forward gear clutch housing by the forward gears electro-hydraulic proportional valve, promote the forward gear clutch piston movement, forward gear clutch sheet hub in forward gear clutch is combined like this, by transmission of power to hub in forward gear clutch, by hub in forward gear clutch, be delivered on the planet row input shaft with its spline joint, when controlling one grade of clutch electro-hydraulic proportional valve, obtain when electric, pressure oil imports in one grade of clutch active chamber by one grade of clutch electro-hydraulic proportional valve, promote one grade of clutch plunger motion, one grade of planet external toothing of planet row after such one grade of clutch plate locking, planet row input shaft as one grade of sun gear is given transmission of power on one grade of planet wheel of rear planet row, make described rear planet row planet carrier follow the planet row input shaft and move together, thus by transmission of power to output shaft, realize one grade of power transmission,
(3) second gear power transmission: the power of motor is delivered on pump impeller through the torque converter pump mid-wheel drive wheel, impulse turbine after pump impeller accelerates the transmission oil in fluid torque converter, by transmission of power to the output shaft of fluid torque converter, the output shaft of fluid torque converter drives the forward gear clutch housing motion with its spline joint, when the forward gears electro-hydraulic proportional valve obtains when electric, pressure oil imports in the forward gear clutch housing by the forward gears electro-hydraulic proportional valve, promote the forward gear clutch piston movement, forward gear clutch sheet hub in forward gear clutch is combined like this, by transmission of power to hub in forward gear clutch, by hub in forward gear clutch, be delivered on the planet row input shaft with its spline joint, controlling second gear clutch electro-hydraulic proportional valve obtains when electric, pressure oil imports in second gear clutch active chamber by second gear clutch electro-hydraulic proportional valve, promote the motion of second gear clutch plunger, planet row second gear planet external toothing after the locking of second gear clutch plate like this, rear planet row second gear sun gear is connected with the planet row input shaft by spline, after utilizing, planet row second gear sun gear drives rear planet row second gear planet wheel rotation, drive described rear planet row planet carrier directional rotating, thereby transmission of power, to output shaft, is realized to the second gear power transmission,
(4) third gear power transmission: the power of motor is delivered on pump impeller through the torque converter pump mid-wheel drive wheel, impulse turbine after pump impeller accelerates the transmission oil in fluid torque converter, by transmission of power to the output shaft of fluid torque converter, the output shaft of fluid torque converter drives the forward gear clutch housing motion with its spline joint, when the forward gears electro-hydraulic proportional valve obtains when electric, pressure oil imports in the forward gear clutch housing by the forward gears electro-hydraulic proportional valve, promote the forward gear clutch piston movement, forward gear clutch sheet hub in forward gear clutch is combined like this, by transmission of power to hub in forward gear clutch, by hub in forward gear clutch, be delivered on the planet row input shaft with its spline joint, controlling third gear clutch electro-hydraulic proportional valve obtains when electric, pressure oil imports in third gear clutch active chamber by third gear clutch electro-hydraulic proportional valve, promote the motion of third gear clutch plunger, third gear clutch plate locking front planetary line like this, after the utilization of described planet row input shaft, planet row second gear sun gear drives the exclusive gear ring rotation of middle planetary, the exclusive gear ring of described middle planetary utilizes middle planetary seniority among brothers and sisters star-wheel that power is passed to middle planetary rows of planetary frame and sun wheel case simultaneously, then power is by two circuit transmission: a, described sun wheel case is given the exclusive gear ring of front planet by front planet row sun gear and front planet rows of planetary wheel by transmission of power successively, by planet row connect hub by transmission of power to the described rear planet row planet carrier with its spline joint, through output shaft, export again, b, described middle planetary rows of planetary frame through planet row connect hub by transmission of power to its spline joint described after on the planet row planet carrier, then, through output shaft output, realize the third gear power transmission,
(5) fourth gear power transmission: the power of motor is delivered on pump impeller through the torque converter pump mid-wheel drive wheel, impulse turbine after pump impeller accelerates the transmission oil in fluid torque converter, by transmission of power to the output shaft of fluid torque converter, the output shaft of fluid torque converter drives the forward gear clutch housing motion with its spline joint, when the forward gears electro-hydraulic proportional valve obtains when electric, pressure oil imports in the forward gear clutch housing by the forward gears electro-hydraulic proportional valve, promote the forward gear clutch piston movement, forward gear clutch sheet hub in forward gear clutch is combined like this, by transmission of power to hub in forward gear clutch, by hub in forward gear clutch, be delivered on the planet row input shaft with its spline joint, controlling fourth gear clutch electro-hydraulic proportional valve obtains when electric, pressure oil imports in fourth gear clutch active chamber by fourth gear clutch electro-hydraulic proportional valve, promote the motion of fourth gear clutch plunger, five grades of clutch housings of fourth gear clutch plate locking like this, make with the sun wheel case of described five grades of clutch housing spline joints static, after the utilization of described planet row input shaft, planet row second gear sun gear drives the exclusive gear ring rotation of middle planetary, power is passed to planet row through described middle planetary rows of planetary frame to be connected on hub, drive described rear planet row planet carrier directional rotating, thereby by transmission of power to output shaft, realize the fourth gear power transmission,
(6) five grades of power transmission: the power of motor is delivered on pump impeller (49) through the torque converter pump mid-wheel drive wheel, impulse turbine after pump impeller accelerates the transmission oil in fluid torque converter, by transmission of power to the output shaft of fluid torque converter, the output shaft of fluid torque converter drives the forward gear clutch housing motion with its spline joint, when the forward gears electro-hydraulic proportional valve obtains when electric, pressure oil imports in the forward gear clutch housing by the forward gears electro-hydraulic proportional valve, promote the forward gear clutch piston movement, forward gear clutch sheet hub in forward gear clutch is combined like this, by transmission of power to hub in forward gear clutch, by hub in forward gear clutch, be delivered on the planet row input shaft with its spline joint, controlling five grades of clutch electro-hydraulic proportional valves obtains when electric, pressure oil imports in five grades of clutch active chambers by five grades of clutch electro-hydraulic proportional valves, promote five grades of clutch plunger motions, five grades of clutch drive hub of such five grades of clutch plate lockings, five grades of clutch assemblies and five grades of clutch drive hub are together moved, thereby make to rotate with the sun wheel case of described five grades of clutch housing spline joints, after the utilization of described planet row input shaft, planet row second gear sun gear drives the exclusive gear ring rotation of middle planetary, power is passed to planet row through described middle planetary rows of planetary frame to be connected on hub, drive described rear planet row planet carrier directional rotating, thereby by transmission of power to output shaft, realize five grades of power transmission,
(7) reverse gear power transmission: the power of motor is delivered on pump impeller through the torque converter pump mid-wheel drive wheel, impulse turbine after pump impeller accelerates the transmission oil in fluid torque converter, by transmission of power to the output shaft of fluid torque converter, the output shaft of fluid torque converter drives the forward gear clutch housing motion with its spline joint, and the forward gear clutch housing drives with five grades of clutch drive hub of its spline joint and together moves.Controlling five grades of clutch electro-hydraulic proportional valves during the work of five grades of clutches obtains when electric, pressure oil imports in five grades of clutch active chambers by five grades of clutch electro-hydraulic proportional valves, promote five grades of clutch plunger motions, five grades of clutch drive hub of such five grades of clutch plate lockings, five grades of clutch assemblies and five grades of clutch drive hub are together moved, thereby make to rotate with the sun wheel case of described five grades of clutch housing spline joints, then described sun wheel case by middle planetary rank star-wheel by transmission of power to described middle planetary rows of planetary frame and the exclusive gear ring of middle planetary; During the work of second gear clutch, controlling second gear clutch electro-hydraulic proportional valve obtains when electric, pressure oil imports in second gear clutch active chamber by second gear clutch electro-hydraulic proportional valve, promote the motion of second gear clutch plunger, planet row second gear planet external toothing after the locking of second gear clutch plate like this, the exclusive gear ring of described middle planetary drives the rear planet row second gear sun gear motion with its spline joint, thereby rear planet row planet carrier is rotated backward with respect to the output shaft of fluid torque converter, again by transmission of power to output shaft, realize the reverse gear power transmission.
The beneficial effect of technique scheme of the present utility model is as follows:
In such scheme, be provided with the fluid power retarder between fluid torque converter and planetary transmission, realize the flexible braking of mine truck, reduce the impact of mechanical braking to motor, transmission system and mechanical braking sytem, braking ability is good.
The accompanying drawing explanation
The structural representation that Fig. 1 is the utility model embodiment one;
The partial enlarged drawing that Fig. 2 is planetary transmission place in embodiment one;
The partial enlarged drawing that Fig. 3 is fluid torque converter place in embodiment one;
Fig. 4 is the power transfer path schematic diagram of embodiment one in the time of one grade;
Fig. 5 is the power transfer path schematic diagram of embodiment one when second gear;
Fig. 6 is the power transfer path schematic diagram of embodiment one when third gear;
Fig. 7 is the power transfer path schematic diagram of embodiment one when fourth gear;
Fig. 8 is the power transfer path schematic diagram of embodiment one in the time of five grades;
Fig. 9 is the power transfer path schematic diagram of embodiment one when reverse gear;
The hydraulic schematic diagram that Figure 10 is hydraulic control executive system in embodiment one;
Description of reference numerals:
1, torque converter pump mid-wheel drive wheel; 2, lockup clutch piston; 3, lockup clutch is by moving plate; 4, lockup clutch platen; 5, the output shaft of fluid torque converter; 6, guide wheel; 7, retarder impeller; 8, retarder housing; 9, forward gear clutch housing; 10, forward gear clutch piston; 11, forward gear clutch sheet; 12, hub in forward gear clutch; 13, five grades of clutch drive hub; 14, fourth gear clutch plate; 15, five grades of clutch housings; 16, five grades of clutch plate; 17, fourth gear clutch plunger; 18, five grades of clutch plungers; 19, third gear clutch plunger; 20, third gear clutch plate; 21, second gear clutch plate; 22, second gear clutch plunger; 23, connect housing; 24, one grade of clutch plate; 25, one grade of clutch plunger; 26, output terminal housing; 29, central supporting; 30, planet row input shaft; 31, sun wheel case; 32, front planet row sun gear; 33, front planet rows of planetary wheel; 34, the exclusive gear ring of front planet; 35, front planetary line; 36, middle planetary rows of planetary frame; 37, planet row connects hub; 38, middle planetary seniority among brothers and sisters star-wheel; 39, the exclusive gear ring of middle planetary; 40, rear planet row second gear planet wheel; 41, rear planet row second gear planet external toothing; 42, rear planet row second gear sun gear; 43, one grade of planet external toothing of rear planet row; 44, rear planet row planet carrier; 45, one grade of planet wheel of rear planet row; 46, output shaft; 47, planetary transmission casing; 48, turbine; 49, pump impeller; 50, free wheel device; 51, torque-converters hub; 52, oil sump; 53, fuel filter; 54, hydraulic pressure duplex pump; 55, main oil pressure filter; 56, fluid torque converter; 57, fluid power retarder; 58, radiator; 59, fluid power retarder control valve; 60, torque-converters pressure regulator valve; 61, main oil pressure pressure regulator valve; 62, safety valve; 63, fluid power retarder solenoid valve; 64, total electro-hydraulic proportional valve; 65, forward gears electro-hydraulic proportional valve; 66, one grade of clutch electro-hydraulic proportional valve; 67, second gear clutch electro-hydraulic proportional valve; 68, third gear clutch electro-hydraulic proportional valve; 69, fourth gear clutch electro-hydraulic proportional valve; 70, five grades of clutch electro-hydraulic proportional valves; 71, lockup clutch shelves solenoid valve; 72, forward gear clutch; 73, one grade of clutch; 74, second gear clutch; 75, third gear clutch; 76, fourth gear clutch; 77, five grades of clutches; 78, lockup clutch.
Embodiment
For making the technical problems to be solved in the utility model, technological scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The utility model descends, has the problem of brake failure risk for existing hydraulic transmission box stopping power, a kind of hydraulic transmission box is provided.
As depicted in figs. 1 and 2, a kind of hydraulic transmission box, comprise fluid torque converter and planetary transmission, it is characterized in that, be provided with the fluid power retarder between described fluid torque converter and planetary transmission, it comprises: be fixedly arranged on retarder housing 8 between described fluid torque converter and planetary transmission, be located at the retarder impeller 7 in this retarder housing 8, output shaft 5 spline joints of this retarder impeller 7 and described fluid torque converter.When vehicle need to slow down, the retarder hydraulic control valve imports transmission oil in retarder housing 8, the output shaft 5 of the fluid torque converter of High Rotation Speed drives 7 rotations of retarder impeller, stir the interior fluid of fluid power retarder housing 8 to consume the Vehicle Driving Cycle energy, thereby the heat energy that is fluid by the kinetic transformation of Vehicle Driving Cycle, realize the deceleration of vehicle.
Described planetary transmission comprises: be located at the planet row input shaft 30 between the output shaft 46 of the output shaft 5 of described fluid torque converter and hydraulic transmission box, planetary transmission casing 47, what with described planetary transmission casing 47, be connected is connected housing 23, be provided with epicyclic train, forward gear clutch assembly, five grades of clutch assemblies, fourth gear clutch assembly, third gear clutch assembly, second gear clutch assembly, one grade of clutch assembly, central supporting 29 in described planetary transmission casing 47, the side of described connection housing 23 is fixed with output terminal housing 26.
Wherein, described forward gear clutch assembly comprises: with the forward gear clutch housing 9 of output shaft 5 spline joints of described fluid torque converter, be slidedly arranged on the forward gear clutch piston 10 in this forward gear clutch housing 9, inside be engaged in the interior hub 12 of forward gear clutch in described planet row input shaft 30 outsides, be incorporated into the forward gear clutch sheet 11 in hub 12 outsides in this forward gear clutch.
Described epicyclic train comprises: be sheathed on the sun wheel case 31 in described planet row input shaft 30 outsides, front planet row, middle planetary row and rear planet row; Wherein, described front planet package is drawn together: the front planet row sun gear 32 that inside is engaged in described sun wheel case 31 outsides, 6 front planet rows of planetary wheels 33 with described front planet row sun gear 32 outer gearings, with the exclusive gear ring 34 of front planet that 6 described front planet rows of planetary are taken turns 33 interior engagements, support the front planetary line 35 of 6 described front planet rows of planetary wheels 33.
Described middle planetary package is drawn together: middle planetary rows of planetary frame 36, be connected hub 37 with the exclusive gear ring 34 of described front planet with the planet row of middle planetary rows of planetary frame 36 interior engagements simultaneously, with 4 middle planetary seniority among brothers and sisters star-wheels 38 of described sun wheel case 31 outer gearings, with the exclusive gear ring 39 of middle planetary of 4 described middle planetary seniority among brothers and sisters star-wheels, 38 interior engagements.
Described rear planet row comprises: in, outer ring respectively with the rear planet row second gear sun gear 42 of described planet row input shaft 30 and the exclusive gear ring 39 interior engagements of middle planetary, with planet row second gear planet wheel 40 after 4 of planet row second gear sun gear 42 outer gearings after this, rear planet row second gear planet external toothing 41 with the 40 interior engagements of 4 described rear planet row second gear planet wheels, in, outer ring is connected respectively the rear planet row planet carrier 44 of hub 37 interior engagements with planet row with described output shaft 46, be located on described rear planet row planet carrier 44 4 one grade of planet wheel 45 of rear planet row with described planet row input shaft 30 outer gearings, one grade of planet external toothing 43 of rear planet row with one grade of planet wheel 45 interior engagement of 4 described rear planet rows.
Described five grades of clutch assemblies comprise: with five grades of clutch housings 15 that mesh in the outer ring of described sun wheel case 31, be slidedly arranged on five grades of clutch plungers 18 in these five grades of clutch housings 15, five grades of clutch drive hub 13, be incorporated into five grades of clutch plate 16 in these five grades of clutch drive hub 13 outsides.
Described fourth gear clutch assembly comprises: be incorporated into the fourth gear clutch plate 14 in described five grades of clutch housing 15 outsides, be slidedly arranged on the fourth gear clutch plunger 17 in described central supporting 29.
Described third gear clutch assembly comprises: be incorporated into the third gear clutch plate 20 in described front planetary line 35 outsides, be slidedly arranged on the third gear clutch plunger 19 in described central supporting 29.
Described second gear clutch assembly comprises: be incorporated into the second gear clutch plate 21 in described rear planet row second gear planet external toothing 41 outsides, be slidedly arranged on the second gear clutch plunger 22 in described connection housing 23.
Described one grade of clutch assembly comprises: be incorporated into one grade of clutch plate 24 in one grade of planet external toothing 43 outside of described rear planet row, be slidedly arranged on one grade of clutch plunger 25 in described output terminal housing 26.
As shown in Figure 3, described fluid torque converter comprises: the torque converter pump mid-wheel drive wheel 1 be fixedly connected with and pump impeller 49, be located at turbine 48 and guide wheel 6 in described pump impeller 49, be sheathed on the torque-converters hub 51 in output shaft 5 outsides of described fluid torque converter, output shaft 5 spline joints of described turbine 48 and fluid torque converter, described guide wheel 6 is connected with torque-converters hub 51 by free wheel device 50, between pump impeller 49 and turbine 48, certain gap is arranged, its energy transmission realizes by fluid.During work, 1 motion of engine-driving torque converter pump mid-wheel drive wheel, drive pump impeller 49 and rotate, the fluid that enters fluid torque converter is accelerated, the Oil shocking turbine 48 accelerated through pump impeller 49, pass to turbine 48 by the kinetic energy of fluid it rotated, output shaft 5 outputs of rear logical described fluid torque converter.Because guide wheel 6 has changed oily flow path direction, make the moment of torsion of torque converter turbine output be greater than the motor input and turn round device, so use during the moment of torsion that fluid torque converter only need to be large when starting and gear shift.
Be provided with lockup clutch in described fluid torque converter, this lockup clutch comprises that the lockup clutch that is slidedly arranged on the interior lockup clutch piston 2 of described torque converter pump mid-wheel drive wheel 1, is located at successively these lockup clutch piston 2 sides is by moving plate 3 and lockup clutch platen 4, and described lockup clutch is often meshed by moving plate 3 and the gear on described turbine 48.When vehicle start, need large driving moment, fluid torque converter work, the output torque of motor is increased through fluid torque converter, thereby the vehicle rotating speed is improved rapidly, when the rotating speed of turbine is brought up to 1800r/min, at this moment vehicle needs transmission system to have high efficiency, the lockup clutch combination, the power of motor is delivered on its synchronous operated lockup clutch piston 2 and lockup clutch platen 4 through torque converter pump mid-wheel drive wheel 1, by lockup clutch, by moving plate 3, be delivered on turbine 48, at this moment power transmission is without fluid torque converter, the efficient purpose of transmitting of reality.
As shown in figure 10, it mainly is comprised of oil sources part, liquid current control part and actuator's part three parts: (a) oil sources partly comprises oil sump 52, fuel filter 53, hydraulic pressure duplex pump 54, main oil pressure filter 55 to the hydraulic control executive system of described hydraulic transmission box.(b) liquid current control part mainly provides oily pressure, fluid flow direction to be controlled to oil sources, and it comprises: torque-converters pressure regulator valve 60, main oil pressure pressure regulator valve 61, safety valve 62, fluid power retarder control valve 59, fluid power retarder solenoid valve 63, always electro-hydraulic proportional valve 64, forward gears electro-hydraulic proportional valve 65, one grade of clutch electro-hydraulic proportional valve 66, second gear clutch electro-hydraulic proportional valve 67, third gear clutch electro-hydraulic proportional valve 68, fourth gear clutch electro-hydraulic proportional valve 69, five grades of clutch electro-hydraulic proportional valves 70, lockup clutch shelves solenoid valve 71.(c) actuator part mainly comprises fluid torque converter 56, fluid power retarder 57, radiator 58, forward gear clutch 72, one grade of clutch 73, second gear clutch 74, third gear clutch 75, fourth gear clutch 76, five grades of clutches 77, lockup clutch 78.
During hydraulic transmission box work, the driving gear of hydraulic pressure duplex pump 54 and converter pump spline joint, making duplex pump work will leave oil sump 52 transmission oils in filters and sucks in hydraulic pressure duplex pump 54 through fuel filter 53, fluid is through 54 superchargings of hydraulic pressure duplex pump, respectively to fluid torque converter oil circuit and speed changer oil circuit fuel feeding, oil duct on being arranged on gear box casing is sent on gear control valve assembly (part in Figure 10 in dotted line), rear respectively by torque-converters pressure regulator valve 60, main oil pressure pressure regulator valve 61, safety valve 62, the fluid torque converter oil pressure is controlled to 0.28MPa, the main oil pressure oil circuit is controlled at 1.2MPa.
Flow through when the fluid power retarder is not worked fluid torque converter 56, fluid power retarder control valve 59, radiator 58 of fluid torque converter oil circuit flow back into the oil end and completes a circulation; The transmission of fluid torque converter 56 of flowing through when the fluid power retarder the is worked fluid power retarder control valve 59 of flowing through changes to flow to and flows into after fluid power retarders 57 to radiator 58, flows into fluid power retarders 57 from radiator 58 again.
When carrying out gear shift or converter lockout, after the total electro-hydraulic proportional valve 64 that passes through electricly through the oil stream of main oil pressure pressure regulator valve 61 flows to the gear solenoid valve, flow in the final controlling element of electric electromagnetic valve.
The method of power transmission of above-mentioned hydraulic transmission box comprises becoming and turns round the method for power transmission in stage and the method for power transmission of gear shift stage that the method for power transmission that the stage is turned round in described change comprises the steps:
(1) at first, the rotating speed of turbine 48 is during lower than 1800r/min, not oil-filled in the lockup clutch piston cavity, now the power of motor is delivered to pump impeller 49 through torque converter pump mid-wheel drive wheel 1 and is sent on the output shaft 5 of fluid torque converter through turbine 48 and guide wheel 6, the transmission of power when completing lockup clutch and not working;
(2) when the rotating speed of turbine 48 during higher than 1800r/min, oil-filled in the lockup clutch piston cavity, the lockup clutch combination, now the power of motor through torque converter pump mid-wheel drive wheel 1 be delivered to lockup clutch by moving plate 3 on, then through turbine 48, be sent on the output shaft 5 of fluid torque converter.
The method of power transmission of described gear shift stage comprises the steps:
Wherein, the method for power transmission of described gear shift stage comprises the steps:
(1) neutral starting: the power of motor is delivered on pump impeller 49 through torque converter pump mid-wheel drive wheel 1, impulse turbine 48 after pump impeller 49 accelerates the transmission oil in fluid torque converter, by transmission of power to the output shaft 5 of fluid torque converter, the output shaft 5 of fluid torque converter drives forward gear clutch housing 9 motions with its spline joint, forward gear clutch housing 9 by transmission of power on five grades of clutch drive hub 13 with its spline joint;
(2) power of motor is delivered on pump impeller 49 through torque converter pump mid-wheel drive wheel 1, impulse turbine 48 after pump impeller 49 accelerates the transmission oil in fluid torque converter, by transmission of power to the output shaft 5 of fluid torque converter, the output shaft 5 of fluid torque converter drives forward gear clutch housing 9 motions with its spline joint, when forward gears electro-hydraulic proportional valve 65 when electric, pressure oil imports in forward gear clutch housing 9 by forward gears electro-hydraulic proportional valve 65, promote 10 motions of forward gear clutch piston, hub 12 combinations in forward gear clutch sheet 11 and forward gear clutch like this, by transmission of power to hub 12 in forward gear clutch, by hub in forward gear clutch 12, be delivered on the planet row input shaft 30 with its spline joint, when control one grade of clutch electro-hydraulic proportional valve 66 when electric, pressure oil imports in one grade of clutch active chamber by one grade of clutch electro-hydraulic proportional valve 66, promote 25 motions of one grade of clutch plunger, one grade of planet external toothing 43 of planet row after such one grade of clutch plate 24 locking, planet row input shaft 30 as one grade of sun gear is given transmission of power on one grade of planet wheel 45 of rear planet row, making described rear planet row planet carrier 44 follow planet row input shaft 30 moves together, thereby transmission of power, to output shaft 46, is realized to one grade of power transmission,
(3) second gear power transmission: the power of motor is delivered on pump impeller 49 through torque converter pump mid-wheel drive wheel 1, impulse turbine 48 after pump impeller 49 accelerates the transmission oil in fluid torque converter, by transmission of power to the output shaft 5 of fluid torque converter, the output shaft 5 of fluid torque converter drives forward gear clutch housing 9 motions with its spline joint, when forward gears electro-hydraulic proportional valve 65 when electric, pressure oil imports in forward gear clutch housing 9 by forward gears electro-hydraulic proportional valve 65, promote 10 motions of forward gear clutch piston, hub 12 combinations in forward gear clutch sheet 11 and forward gear clutch like this, by transmission of power to hub 12 in forward gear clutch, by hub in forward gear clutch 12, be delivered on the planet row input shaft 30 with its spline joint, control second gear clutch electro-hydraulic proportional valve 67 when electric, pressure oil imports in second gear clutch active chamber by second gear clutch electro-hydraulic proportional valve 67, promote 22 motions of second gear clutch plunger, planet row second gear planet external toothing 41 after 21 lockings of second gear clutch plate like this, rear planet row second gear sun gear 42 is connected with planet row input shaft 30 by spline, after utilizing, planet row second gear sun gear 42 drives rear planet row second gear planet wheel 40 rotations, drive described rear planet row planet carrier 44 directional rotatings, thereby transmission of power, to output shaft 46, is realized to the second gear power transmission,
(4) third gear power transmission: the power of motor is delivered on pump impeller 49 through torque converter pump mid-wheel drive wheel 1, impulse turbine 48 after pump impeller 49 accelerates the transmission oil in fluid torque converter, by transmission of power to the output shaft 5 of fluid torque converter, the output shaft 5 of fluid torque converter drives forward gear clutch housing 9 motions with its spline joint, when forward gears electro-hydraulic proportional valve 65 when electric, pressure oil imports in forward gear clutch housing 9 by forward gears electro-hydraulic proportional valve 65, promote 10 motions of forward gear clutch piston, hub 12 combinations in forward gear clutch sheet 11 and forward gear clutch like this, by transmission of power to hub 12 in forward gear clutch, by hub in forward gear clutch 12, be delivered on the planet row input shaft 30 with its spline joint, control third gear clutch electro-hydraulic proportional valve 68 when electric, pressure oil imports in third gear clutch active chamber by third gear clutch electro-hydraulic proportional valve 68, promote 19 motions of third gear clutch plunger, third gear clutch plate 20 locking front planetary lines 35 like this, after described planet row input shaft 30 utilizes, planet row second gear sun gear 42 drives exclusive gear ring 39 rotations of middle planetary, the exclusive gear ring 39 of described middle planetary utilizes middle planetary seniority among brothers and sisters star-wheel 38 that power is passed to middle planetary rows of planetary frame 36 and sun wheel case 31 simultaneously, then power is by two circuit transmission: a, described sun wheel case 31 is given the exclusive gear ring 34 of front planet by front planet row sun gear 32 and front planet rows of planetary wheel 33 by transmission of power successively, by planet row connect hub 37 by transmission of power to the described rear planet row planet carrier 44 with its spline joint, again through output shaft 46 outputs, b, described middle planetary rows of planetary frame 36 through planet row connect hub 37 by transmission of power to its spline joint described after on planet row planet carrier 44, then, through output shaft 46 outputs, realize the third gear power transmission,
(5) fourth gear power transmission: the power of motor is delivered on pump impeller 49 through torque converter pump mid-wheel drive wheel 1, impulse turbine 48 after pump impeller 49 accelerates the transmission oil in fluid torque converter, by transmission of power to the output shaft 5 of fluid torque converter, the output shaft 5 of fluid torque converter drives forward gear clutch housing 9 motions with its spline joint, when forward gears electro-hydraulic proportional valve 65 when electric, pressure oil imports in forward gear clutch housing 9 by forward gears electro-hydraulic proportional valve 65, promote 10 motions of forward gear clutch piston, hub 12 combinations in forward gear clutch sheet 11 and forward gear clutch like this, by transmission of power to hub 12 in forward gear clutch, by hub in forward gear clutch 12, be delivered on the planet row input shaft 30 with its spline joint, control fourth gear clutch electro-hydraulic proportional valve 69 when electric, pressure oil imports in fourth gear clutch active chamber by fourth gear clutch electro-hydraulic proportional valve 69, promote 17 motions of fourth gear clutch plunger, five grades of clutch housings 15 of fourth gear clutch plate 14 locking like this, make with the sun wheel case 31 of described five grades of clutch housing 15 spline joints static, after described planet row input shaft 30 utilizes, planet row second gear sun gear 42 drives exclusive gear ring 39 rotations of middle planetary, power is passed to planet row through described middle planetary rows of planetary frame 36 to be connected on hub 37, drive described rear planet row planet carrier 44 directional rotatings, thereby by transmission of power to output shaft 46, realize the fourth gear power transmission,
(6) five grades of power transmission: the power of motor is delivered on pump impeller 49 through torque converter pump mid-wheel drive wheel 1, impulse turbine 48 after pump impeller 49 accelerates the transmission oil in fluid torque converter, by transmission of power to the output shaft 5 of fluid torque converter, the output shaft 5 of fluid torque converter drives forward gear clutch housing 9 motions with its spline joint, when forward gears electro-hydraulic proportional valve 65 when electric, pressure oil imports in forward gear clutch housing 9 by forward gears electro-hydraulic proportional valve 65, promote 10 motions of forward gear clutch piston, hub 12 combinations in forward gear clutch sheet 11 and forward gear clutch like this, by transmission of power to hub 12 in forward gear clutch, by hub in forward gear clutch 12, be delivered on the planet row input shaft 30 with its spline joint, control five grades of clutch electro-hydraulic proportional valves 70 when electric, pressure oil imports in five grades of clutch active chambers by five grades of clutch electro-hydraulic proportional valves 70, promote 18 motions of five grades of clutch plungers, five grades of clutch drive hub 13 of such five grades of clutch plate, 16 locking, five grades of clutch assemblies and five grades of clutch drive hub 13 are together moved, thereby make to rotate with the sun wheel case 31 of described five grades of clutch housing 15 spline joints, after described planet row input shaft 30 utilizes, planet row second gear sun gear 42 drives exclusive gear ring 39 rotations of middle planetary, power is passed to planet row through described middle planetary rows of planetary frame 36 to be connected on hub 37, drive described rear planet row planet carrier 44 directional rotatings, thereby by transmission of power to output shaft 46, realize five grades of power transmission,
(7) reverse gear power transmission: the power of motor is delivered on pump impeller 49 through torque converter pump mid-wheel drive wheel 1, impulse turbine 48 after pump impeller 49 accelerates the transmission oil in fluid torque converter, by transmission of power to the output shaft 5 of fluid torque converter, the output shaft 5 of fluid torque converter drives forward gear clutch housing 9 motions with its spline joint, and forward gear clutch housing 9 drives with five grades of clutch drive hub 13 of its spline joint and together moves.During the work of five grades of clutches, control five grades of clutch electro-hydraulic proportional valves 70 when electric, pressure oil imports in five grades of clutch active chambers by five grades of clutch electro-hydraulic proportional valves 70, promote 18 motions of five grades of clutch plungers, five grades of clutch drive hub 13 of such five grades of clutch plate, 16 locking, five grades of clutch assemblies and five grades of clutch drive hub 13 are together moved, thereby make to rotate with the sun wheel case 31 of described five grades of clutch housing 15 spline joints, then described sun wheel case 31 is ranked star-wheel 38 by middle planetary and is given described middle planetary rows of planetary frame 36 and the exclusive gear ring 39 of middle planetary by transmission of power, during the work of second gear clutch, control second gear clutch electro-hydraulic proportional valve 67 when electric, pressure oil imports in second gear clutch active chamber by second gear clutch electro-hydraulic proportional valve 67, promote 22 motions of second gear clutch plunger, planet row second gear planet external toothing 41 after 21 lockings of second gear clutch plate like this, the exclusive gear ring 39 of described middle planetary drives rear planet row second gear sun gear 42 motions with its spline joint, thereby rear planet row planet carrier 44 is rotated backward with respect to the output shaft 5 of fluid torque converter, again by transmission of power to output shaft 46, realize the reverse gear power transmission.
The utility model is provided with the fluid power retarder between fluid torque converter and planetary transmission, realizes the flexible braking of mine truck, reduces the impact of mechanical braking to motor, transmission system and mechanical braking sytem, and braking ability is good.
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (5)

1. a hydraulic transmission box, comprise fluid torque converter and planetary transmission, it is characterized in that, be provided with the fluid power retarder between described fluid torque converter and planetary transmission, it comprises: be fixedly arranged on retarder housing (8) between described fluid torque converter and planetary transmission, be located at the retarder impeller (7) in this retarder housing (8), output shaft (5) spline joint of this retarder impeller (7) and described fluid torque converter.
2. hydraulic transmission box according to claim 1, it is characterized in that, described planetary transmission comprises: be located at the planet row input shaft (30) between the output shaft (46) of the output shaft (5) of described fluid torque converter and hydraulic transmission box, planetary transmission casing (47), what with described planetary transmission casing (47), be connected is connected housing (23), be provided with epicyclic train in described planetary transmission casing (47), the forward gear clutch assembly, five grades of clutch assemblies, the fourth gear clutch assembly, the third gear clutch assembly, the second gear clutch assembly, one grade of clutch assembly, central supporting (29), the side of described connection housing (23) is fixed with output terminal housing (26),
Wherein, described forward gear clutch assembly comprises: with the forward gear clutch housing (9) of output shaft (5) spline joint of described fluid torque converter, be slidedly arranged on the forward gear clutch piston (10) in this forward gear clutch housing (9), inside be engaged in the interior hub (12) of forward gear clutch in described planet row input shaft (30) outside, be incorporated into the forward gear clutch sheet (11) in hub (12) outside in this forward gear clutch;
Described epicyclic train comprises: be sheathed on the sun wheel case (31) in described planet row input shaft (30) outside, front planet row, middle planetary row and rear planet row; Wherein, described front planet package is drawn together: inside be engaged in the front planet row sun gear (32) in described sun wheel case (31) outside, with the n of described front planet row sun gear (32) outer gearing 1individual front planet rows of planetary wheel (33), with n 1the exclusive gear ring of front planet (34) of engagement in individual described front planet rows of planetary wheel (33), support n 1the front planetary line (35) of individual described front planet rows of planetary wheel (33);
Described middle planetary package is drawn together: middle planetary rows of planetary frame (36), be connected hub (37) with the exclusive gear ring of described front planet (34) with the planet row of engagement in middle planetary rows of planetary frame (36), with the n of described sun wheel case (31) outer gearing simultaneously 2individual middle planetary seniority among brothers and sisters star-wheel (38), with n 2the exclusive gear ring of middle planetary (39) of engagement in individual described middle planetary seniority among brothers and sisters star-wheel (38);
Described rear planet row comprises: inside and outside circle respectively with described planet row input shaft (30) and the exclusive gear ring of middle planetary (39) in the rear planet row second gear sun gear (42) of engagement, with the n of planet row second gear sun gear (42) outer gearing after this 3individual rear planet row second gear planet wheel (40), with n 3the rear planet row second gear planet external toothing (41) of engagement in individual described rear planet row second gear planet wheel (40), inside and outside circle is connected respectively the rear planet row planet carrier (44) of the interior engagement of hub (37) with planet row with described output shaft (46), be located at the n on described rear planet row planet carrier (44) 4one grade of planet wheel of rear planet row (45) of individual and described planet row input shaft (30) outer gearing, with n 4one grade of planet external toothing of rear planet row (43) of engagement in individual described one grade of planet wheel of rear planet row (45);
Described five grades of clutch assemblies comprise: with five grades of clutch housings (15) of engagement in the outer ring of described sun wheel case (31), be slidedly arranged on the five grades of clutch plungers (18) in these five grades of clutch housings (15), five grades of clutch drive hub (13), be incorporated into five grades of clutch plate (16) in this five grades of clutch drive hub (13) outside;
Described fourth gear clutch assembly comprises: be incorporated into the fourth gear clutch plate (14) in described five grades of clutch housings (15) outside, be slidedly arranged on the fourth gear clutch plunger (17) in described central supporting (29);
Described third gear clutch assembly comprises: be incorporated into the third gear clutch plate (20) in described front planetary line (35) outside, be slidedly arranged on the third gear clutch plunger (19) in described central supporting (29);
Described second gear clutch assembly comprises: be incorporated into the second gear clutch plate (21) in described rear planet row second gear planet external toothing (41) outside, be slidedly arranged on the second gear clutch plunger (22) in described connection housing (23);
Described one grade of clutch assembly comprises: be incorporated into one grade of clutch plate (24) in one grade of planet external toothing of described rear planet row (43) outside, be slidedly arranged on the one grade of clutch plunger (25) in described output terminal housing (26).
3. hydraulic transmission box according to claim 1, it is characterized in that, described fluid torque converter comprises: the torque converter pump mid-wheel drive wheel (1) be fixedly connected with and pump impeller (49), be located at turbine (48) and guide wheel (6) in described pump impeller (49), be sheathed on the torque-converters hub (51) outside the output shaft (5) of described fluid torque converter, output shaft (5) spline joint of described turbine (48) and fluid torque converter, described guide wheel (6) is connected with torque-converters hub (51) by free wheel device (50).
4. according to the described hydraulic transmission box of claim 1 or 3, it is characterized in that, be provided with lockup clutch in described fluid torque converter, this lockup clutch comprises that the lockup clutch that is slidedly arranged on the interior lockup clutch piston (2) of described torque converter pump mid-wheel drive wheel (1), is located at successively this lockup clutch piston (2) side is by moving plate (3) and lockup clutch platen (4), and described lockup clutch is often meshed by moving plate (3) and the gear on described turbine (48).
5. hydraulic transmission box according to claim 2, is characterized in that, described n 1be 6, described n 2, n 3and n 4be 4.
CN201320185843.4U 2013-04-15 2013-04-15 Hydraulic transmission box Expired - Fee Related CN203374749U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103206509A (en) * 2013-04-15 2013-07-17 孔照林 Hydraulic transmission box and power transmission method thereof
CN113357337A (en) * 2021-06-03 2021-09-07 谭建文 Impeller type stepless speed changer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103206509A (en) * 2013-04-15 2013-07-17 孔照林 Hydraulic transmission box and power transmission method thereof
CN103206509B (en) * 2013-04-15 2016-02-17 孔照林 Hydraulic transmission box and method of power transmission thereof
CN113357337A (en) * 2021-06-03 2021-09-07 谭建文 Impeller type stepless speed changer

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