CN104129293A - Tractor - Google Patents

Abstract

The invention discloses a tractor, and relates to the technical field of agricultural machine manufacturing. The tractor comprises an engine, and an output shaft of the engine is connected with a power distribution box arranged between a front drive axle and a rear drive axle. A first output shaft of the power distribution box is connected with a first hydraulic pump, the first hydraulic pump is connected with a first hydraulic motor, and the first hydraulic motor is connected with gear transmission cases arranged at the two ends of an input shaft of an agricultural implement. A second output shaft of the power distribution box is connected with a second hydraulic pump, and the second hydraulic pump is communicated with a lifting oil cylinder of an agricultural implement suspension device through a second electromagnetic valve set. A third output shaft of the power distribution box is connected with a third hydraulic pump, the third hydraulic pump is connected with a third hydraulic motor, and the third hydraulic motor is connected with an input shaft of the front drive axle and an input shaft of the rear drive axle through a gearbox. Compared with the prior art, the tractor can solve the problems that an existing tractor is insufficient in traction force and poor in power output performance during tractor-ploughing operation.

Description

Trac.

Technical field

The present invention relates to manufacture of agricultural machinery technical field, especially a kind of for passing through the trac. of hydraulic system transfers power.

Background technology

Existing a kind of wheeled trac. as shown in Figure 1, this trac. comprises the bridge case 105 being connected with driving engine 101 with power-transfer clutch 102 by coupler 103 successively, on bridge case 105, be provided with three road power take-off units, one road power take-off unit is by rear-axle drive trailing wheel 104, one road power take-off unit drives agricultural machinery and implement 107, one road power take-off units to drive by lift tank 109 three-point attachment 108 that connects agricultural machinery and implement by output shaft 106.In use there are the following problems for the power drive of this trac.: 1, this bridge case with three road power take-off units is subject to the restriction of its structure, cause the output torque of the output shaft being connected with agricultural machinery and implement little, during tractor-ploughing operation, power output performance is poor; In addition, because the output torque of output shaft is little, while running into the obstacle obstructions such as boulder when agricultural machinery and implement, trac. need be stopped, hindering after the obstacle cleanings such as boulder of agricultural machinery and implement, just can proceed operation, production operation efficiency is low; 2, owing to driving the power take-off unit of trac. walking, be also logical bridge case output, make tractor drawbar pull not enough, particularly, when turning, due to the reach of deceleration center of gravity, trailing wheel earth-grasping force reduces, and is easy to cause ovdersteering, occurs whipping phenomenon.

Summary of the invention

Problem solved by the invention be to provide a kind of can reasonable distribution the trac. of power output, the poor problem of power output performance when solving the not enough and tractor-ploughing operation of existing tractor drawbar pull.

In order to address the above problem, the technical solution used in the present invention is: this trac. includes driving engine, the output shaft of described driving engine is connected with the power distribution case being located between front driving axle and rear driving axle, the first output shaft of described power distribution case is connected with the first Hydraulic Pump, the delivery port of described the first Hydraulic Pump is communicated with the oil inlet of the first HM Hydraulic Motor by oil pipe and the first electromagnetic valve group, and described the first HM Hydraulic Motor is connected with the gear that is contained in agricultural machinery and implement input shaft two ends; The second output shaft of described power distribution case is connected with the second Hydraulic Pump, and the delivery port of described the second Hydraulic Pump is communicated with the oil inlet of the elevating ram of agricultural implement hanging device by oil pipe and the second electromagnetic valve group; The 3rd output shaft of described power distribution case is connected with the input shaft that is provided with the 3rd Hydraulic Pump of guide's hydraulic control handle, described the 3rd Hydraulic Pump is connected with the 3rd HM Hydraulic Motor, and described the 3rd HM Hydraulic Motor is connected with the input shaft of described front driving axle and described rear driving axle respectively by change speed gear box.

In above-mentioned trac. technical scheme, technical scheme can also be more specifically: the valve control end of described the first electromagnetic valve group and described the second electromagnetic valve group is connected with the second master cock with the first master cock respectively.

Owing to having adopted technique scheme, the present invention compared with prior art has following beneficial effect: 1, because driving engine is divided into hydraulic power unit and hydrostatic drive driver element by power distribution case, one can reasonable distribution power, improve operation power, make agricultural machinery and implement obtain maximum driving torque, improve operating efficiency; It can expand the variation range of the torque and rotational speed of power output by changing transmitting ratio two owing to being provided with power distribution case, makes to start function preferably under operating mode, working; 2, the delivery rate that adopts guide's hydraulic control handle to control Hydraulic Pump carrys out the rotating speed of regulator solution pressure motor, realize the stepless speed variation of each gear in change speed gear box, simplified the control action of chaufeur, the light fatigue of chaufeur, and there is torque reserve ability, guaranteeing to transmit driving engine output maximum torque in non-slip, can prevent again transmission system overload, thereby avoid the damage of part in a series of driving systems, the power output performance of subsoiling machine of working soil and the ability of leaping over obstacles are strengthened greatly, improve production operation efficiency; 3, because master cock is controlled electromagnetic valve group change hydraulic flow, pressure reduction, expanded the variation range of the torque and rotational speed of power output, to adapt to the physical features of frequent variation, made driving engine preferably under operating mode, work simultaneously; Control electromagnetic valve group and can interrupt transmission of power, agricultural machinery and implement are quit work, can make like this car load not be affected in road driving, temporarily parking and field adjustment, production operation efficiency is improved; 4, the master cock being connected with electromagnetic valve group is controlled the hydraulic flow of Hydraulic Pump and is realized the rotation of controlling agricultural machinery and implement, make agricultural machinery and implement stop and shifting gears can complete in good time, simplified the control action of chaufeur, further alleviated the strength at repeated alternation of chaufeur, and there is torque reserve ability, guaranteeing to transmit driving engine output maximum torque in non-slip, can prevent again transmission system overload, thereby avoid the damage of part in a series of driving systems, make the power output performance of trac. obtain enhancing greatly.

Accompanying drawing explanation

Fig. 1 is the structural representation of existing trac..

Fig. 2 is the structural representation of example of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing example, the invention will be further described:

Trac. as shown in Figure 2 includes driving engine 1, the output shaft of driving engine 1 is connected with the input shaft that is contained in the power distribution case 2 between front driving axle 18 and rear driving axle 12, the first output shaft of power distribution case 2 is connected with the first Hydraulic Pump 3, the delivery port of the first Hydraulic Pump 3 is communicated with the oil inlet of two the first HM Hydraulic Motor 7 respectively by the first electromagnetic valve group 5 and oil pipe, and the valve control end of the first electromagnetic valve group 5 is connected with the first master cock 4; The output shaft of two the first HM Hydraulic Motor 7 is connected with the input shaft of two gears 8 respectively, and the output shaft of two gears 8 is connected with the two ends of agricultural machinery and implement 9 input shafts respectively.The second output shaft of power distribution case 2 is connected with the second Hydraulic Pump 10-1, the delivery port of the second Hydraulic Pump 10-1 is communicated with the oil inlet of the elevating ram 10 of driving agricultural implement hanging device by the second electromagnetic valve group 10-2 and oil pipe, and the valve control end of the second electromagnetic valve group 10-2 is connected with the second master cock 10-3.The delivery port that the 3rd output shaft of power distribution case 2 is connected with the 3rd Hydraulic Pump 16, the three Hydraulic Pumps 16 is communicated with the oil inlet of the 3rd HM Hydraulic Motor 14 by oil pipe, and the 3rd Hydraulic Pump 16 is connected with guide's hydraulic control handle 161; The output shaft of the 3rd HM Hydraulic Motor 14 is connected with the input shaft of change speed gear box 15, change speed gear box 15 is connected with the rear driving axle 12 that trailing wheel 6 is housed with the front driving axle 18 that front-wheel 19 is housed with rear propeller shaft 13 by front propeller shaft 17 respectively, front propeller shaft 17 is equipped with universal-joint between front driving axle 18 input shafts and change speed gear box 15 front output shafts, and rear propeller shaft 13 is equipped with universal-joint between change speed gear box 15 rear output shafts and rear driving axle 12 input shafts.

During work, engine power has two-way hydraulic power take-off unit He Yi road hydrostatic drive driver element by power distribution case 2, wherein two-way hydraulic power take-off unit hydraulic power unit is passed to respectively the first Hydraulic Pump 3 and the second Hydraulic Pump 10-1 by the power of driving engine, the power that is passed to the first Hydraulic Pump 3 is controlled the rotating speed of the first HM Hydraulic Motor 7 through the first electromagnetic valve group 5, the first HM Hydraulic Motor 7 drives agricultural machinery and implement 8 to rotate by gear 8; The power that is passed to the second Hydraulic Pump 10-1 is controlled elevating ram 10 driving agricultural implement hanging device liters, decline operation by the second electromagnetic valve group 10-2.One tunnel hydrostatic drive driver element is passed to the 3rd Hydraulic Pump 16 by the power of driving engine through power distribution case 2, the 3rd Hydraulic Pump 16 drives front propeller shaft 17 and rear propeller shaft 13 by change speed gear box 15, make front driving axle 18, rear driving axle 12 drive respectively front-wheel 19, trailing wheel 6 walkings, the present embodiment is controlled the rotating speed of delivery rate adjusting the 3rd HM Hydraulic Motor 14 of the 3rd Hydraulic Pump 16 by guide's hydraulic control handle 161, make each gear in change speed gear box 15 realize stepless speed variation.

Claims (2)

1. a trac., include driving engine (1), it is characterized in that: the output shaft of described driving engine (1) is connected with the power distribution case (2) being located between front driving axle (18) and rear driving axle (12), the first output shaft of described power distribution case (2) is connected with the first Hydraulic Pump (3), the delivery port of described the first Hydraulic Pump (3) is communicated with the oil inlet of the first HM Hydraulic Motor (7) by oil pipe and the first electromagnetic valve group (5), and described the first HM Hydraulic Motor (7) is connected with the gear (8) that is contained in agricultural machinery and implement (9) input shaft two ends; The second output shaft of described power distribution case (2) is connected with the second Hydraulic Pump (10-1), and the delivery port of described the second Hydraulic Pump (10-1) is communicated with the oil inlet of the elevating ram (10) of agricultural implement hanging device by oil pipe and the second electromagnetic valve group (10-2); The 3rd output shaft of described power distribution case (2) is connected with the input shaft that is provided with the 3rd Hydraulic Pump (16) of guide's hydraulic control handle (161), described the 3rd Hydraulic Pump (16) is connected with the 3rd HM Hydraulic Motor (14), and described the 3rd HM Hydraulic Motor (14) is connected with the input shaft of described rear driving axle (12) with described front driving axle (18) respectively by change speed gear box (15).

2. trac. according to claim 1, is characterized in that: the valve control end of described the first electromagnetic valve group (5) and described the second electromagnetic valve group (10-2) is connected with the second master cock (10-3) with the first master cock (4) respectively.