CN201376594Y - Tracked vehicle hydromechanical integrated transmission - Google Patents

Abstract

The utility model provides a hydraulic mechanical integrated transmission device of a tracked vehicle, comprising a main variable speed part, an auxiliary variable speed part, a steering differential part and a wheel-side variable speed part, wherein the main variable speed part comprises an input shaft and a first static hydraulic transmission device; the steering differential part comprises a second hydraulic transmission device, a left side planetary differential and a right side planetary differential; part of power from an engine is transmitted to the wheel-side variable speed part via the input shaft, the first static hydraulic transmission device, the auxiliary variable speed part, the left side planetary differential and the right side planetary differential, and another part of the power is transmitted to the wheel-side variable speed part via the input shaft, the second static hydraulic transmission device, the left side planetary differential and the right side planetary differential; and the second static hydraulic transmission device transmits power only in steering of the tracked vehicle.

Description

Tracked vehicle hydromechanical integrated transmission

Technical field:

The utility model relates to a vehicle hydraulic-mechanical comprehensive transmission device, in particular to a dual-power-flow crawler vehicle hydraulic-mechanical comprehensive transmission device adopting two sets of hydrostatic transmission devices.

Background technique:

With the increase of power and speed of agricultural crawler vehicles, the requirements for steering performance and maneuverability are also getting higher and higher. For this reason, it is of great significance to research and design a new hydraulic-mechanical integrated rotating device for tracked vehicles with dual power flows, which has better dynamic performance and higher transmission efficiency. The performance requirements of this kind of integrated transmission device are mainly reflected in: better steering characteristics, which can realize the in-situ steering of crawler machinery, reduce the turning radius, flexible steering, and simple control; The resistance is reduced, reducing energy loss; the adaptability to soil conditions is enhanced during steering, and soil damage is reduced; it is necessary to meet the requirements of steering flexibility and achieve a certain degree of speed reduction and torque increase.

In the prior art, JP2005-54335A discloses a similar crawler vehicle running device, which is structured to transmit driving force from the engine to the left and right crawlers through HST (Hydro Static Transmission), and between the HST and the left and right crawlers. A clutch and a brake are provided on the driving force transmission path between them. The clutch is used to block the transmission of driving force to one side of the track, and the brake is used to lock the side track for turning. However, this transmission is not easy to perform flexible turns, and it is easy to sink into the ground when turning on soft soil.

Utility model content:

The technical problem to be solved by the utility model is to provide a dual-power-flow crawler vehicle hydraulic-mechanical integrated transmission device using two sets of hydrostatic transmission devices for the above-mentioned deficiencies in the prior art.

In order to control the operation conveniently and effectively when driving, the vehicle hydraulic-mechanical comprehensive transmission device of the utility model adopts two groups of hydrostatic transmission devices, one group drives the vehicle to drive straight when driving, and the other group participates in the work when turning, and the differential speed changes The planetary differential device is used in the box to realize power confluence and drive the vehicle to turn. By controlling the inclination angle of the swash plate of the variable pump in the hydrostatic transmission device, the continuously variable speed and forward and reverse functions can be realized, so the power can be distributed to the crawlers on both sides in proportion, and the crawlers on both sides are always controlled when turning, which can realize Power does not cut off steering.

Because the speed difference between the left and right crawlers can be controlled steplessly, it can realize stable and precise direction control and improve the maneuverability of the vehicle; the power is not interrupted when turning, and the adaptability to soil conditions is enhanced. Little damage to farmland soil, especially when working in soft farmland, the impact on soil slipping is significantly reduced, so the steering resistance is reduced to save energy loss. The whole machine has good passability and high operating efficiency; when turning, the track overcomes the slipping phenomenon, reduces the wear of the track and improves its service life, which is very important for rubber track vehicles; the steering control part can be turned by turning the steering wheel like a wheeled tractor , the whole vehicle is automatically decelerated while turning through the steering device, and the handling habits are the same as those of wheeled vehicles. The control of the whole vehicle is simple, flexible, high-precision, and can realize in-situ steering; there will be no "reverse steering" phenomenon when steering on slopes.

Specifically, the vehicle hydraulic-mechanical integrated transmission device of the present invention includes a main transmission part, an auxiliary transmission part, a steering differential part and a wheel-side transmission part; wherein the main transmission part includes an input shaft and a first hydrostatic transmission device; the The steering differential part includes the second hydrostatic transmission device and the left and right planetary differential devices; part of the power from the engine passes through the input shaft, the first hydrostatic transmission device, the auxiliary transmission part, the The left and right planetary differentials are transmitted to the wheel side transmission part, and the other part is transmitted to the wheel side through the input shaft, the second hydrostatic transmission, and the left and right planetary differentials Transmission section; said second hydrostatic transmission transmits power only when the tracked vehicle is turning.

A power distribution gear is provided on the input shaft, and the power distribution gear is used to transmit power to the second hydrostatic transmission device.

Both the first and second hydrostatic transmission devices include a variable displacement pump and a quantitative motor, and the variable displacement pump and the quantitative motor are combined variable displacement pump and quantitative motors.

The auxiliary transmission part includes a first countershaft and a second countershaft, the first countershaft is provided with a duplex gear, the duplex gear can slide on the first countershaft, and the second countershaft The fast gear or the slow gear on the shaft meshes.

The wheel shifting part includes left and right wheel driving gears, left and right wheel driven gears, and the left and right wheel driven gears are connected with left and right driving wheels.

The left and right planetary differential devices all include a sun gear, a planetary gear, a planet carrier, and a planetary outer ring gear, and the left and right planetary differential devices share a sun gear shaft, and the left and right The planet carrier is respectively connected with the driving gears on the left and right sides of the wheels.

The second hydrostatic transmission device drives the planetary outer large ring gears in the left and right planetary differential devices through gear transmission.

And in the gear transmission between the second hydrostatic transmission and the left and right planetary differentials, the gear ratio driving the right planetary differential drives the left planetary differential The gear transmission of the speed device has one more stage of gear meshing.

The gear transmission is a spur gear transmission.

The input shaft is provided with a pulley.

Description of drawings:

Fig. 1 is the transmission schematic diagram of the vehicle hydraulic mechanical comprehensive transmission device according to the utility model;

Detailed ways

Below in conjunction with accompanying drawing, illustrate the preferred embodiment of the present utility model.

Fig. 1 is a transmission schematic diagram of a vehicle hydraulic-mechanical integrated transmission device according to the present invention. As shown in Figure 1: The hydraulic-mechanical integrated transmission of the vehicle adopts a first-stage auxiliary transmission to adapt to the two speed sections of transportation and harvesting to meet the requirements of high-efficiency low-speed traction and high-speed transportation in the entire operating speed section. The hydrostatic transmission is used as the external drive source, because it can realize different rotation speeds and different rotation directions of the output shaft, so the gearbox matched with it does not need to be equipped with a reverse gear. In addition, there are two hydrostatic transmission devices, one drives the vehicle to go straight when driving, and the other participates in the work when turning, and the planetary differential device is used in the reduction box to realize the forward and reverse functions required for turning. In FIG. 1 , symbols I, II, III, IV, V, VI, VIII, IX, X, and XI represent respective transmission shafts.

Specifically, the transmission device is composed of a main transmission part, an auxiliary transmission part, a steering differential part and a wheel transmission part. Wherein, the main transmission part includes the input shaft 1, the travel variable pump 11 and the travel quantitative motor 12, and the travel variable pump 11 and the travel quantitative motor 12 are combined variable variable pump quantitative motors, and the forward movement is realized by adjusting the swash plate inclination angle of the travel variable pump 1. and backwards. A pulley 100 is provided on the input shaft 1 to receive the power input from the engine (not shown). The input shaft 1 is also provided with a power distribution gear 1 for distributing the engine power, that is, the engine power is transmitted to the input shaft 1 through the pulley 100, and a part of the power is distributed to the walking variable pump 11, and at the same time through the power distribution gear 1 and the steering variable The meshing of the input gear 10 of the pump 2 distributes another part of the power to the variable steering pump 21 .

The auxiliary transmission section includes a first countershaft II and a second countershaft III. The double gear 4 slides on the first intermediate shaft II and meshes with the fast gear 6 or the slow gear 5 on the second intermediate shaft III to realize the fast gear for transportation and the slow gear for working conditions. Switch between gears.

The traveling intermediate gear 7 is provided on the third intermediate shaft IV, which meshes with the fast gear 6 on the second intermediate shaft III. In addition, there are left and right planetary differential devices on the third intermediate shaft IV, and the left and right planetary differential devices are identical, including sun gear a, planetary gear b, planetary carrier, and planetary outer large teeth Circle c, the left and right planetary differential devices share the sun gear shaft, the left and right planet carrier shafts are respectively connected to the left and right wheel side driving reduction gear 8, and the power is transferred to the left and right side wheel side driven reduction gear 9 through the left and right side wheel side driven reduction gear Delivered to the left and right drive wheels 200L, 200R.

In addition, the composition of the steering differential and the power transmission route during steering are as follows:

Part of the power of the engine is transmitted to the variable steering pump 22 through the meshing of the power distribution gear 1 and the input gear 10 of the variable steering pump 2 . The variable steering pump 21 drives the quantitative steering motor 22, and the output gear 11 of the quantitative steering motor meshes with the input gear 12 of the sixth countershaft to drive the sixth countershaft VII to rotate. Then, the sixth countershaft output gear 13 meshes with the fifth countershaft input gear 14 to transmit the power to the left and right side output gears 16 and 15 of the fifth countershaft. Then through the fifth countershaft left output gear 16, the fourth countershaft gear 17, the left side planetary gear outer large ring gear c, the left planetary gear b, the left planetary carrier, the left wheel side driving reduction gear 8, the left side wheel The side driven reduction gear 9 transmits the power to the left driving wheel 200L; through the fifth countershaft right output gear 15, the eighth countershaft gear 18, the ninth countershaft gear 19, and the outer large ring gear of the right planetary wheel c, the right planetary wheel b, the right planetary carrier, the driving reduction gear 8 on the right side of the wheel, and the driven reduction gear 9 on the right side of the wheel, transmit power to the right driving wheel 200R. Here, an intermediate shaft gear is added to the power transmission line on the right side compared with the power transmission line on the left side, so as to realize the opposite direction of rotation of the outer large ring gears of the left and right planetary wheels, thereby realizing the opposite rotation of the left and right driving wheels.

Claims (10)

1, the mechanical integrated driving device of a kind of vehicle hydraulic, it comprises main transformer speed part, secondary variable part, turns to differential partial sum wheel variable part, limit; Wherein said main transformer speed part comprises input shaft, first hydrostatic transmission; The described differential that turns to partly comprises second hydrostatic transmission and left and right side planet differential device; From the described input shaft of power part process of driving engine, described first hydrostatic transmission, described secondary variable part, described left and right side planet differential device is passed to the described variable part, limit of taking turns, and another part is passed to the described variable part, limit of taking turns through described input shaft, described second hydrostatic transmission, described left and right side planet differential device.

2, the mechanical integrated driving device of vehicle hydraulic as claimed in claim 1, wherein, described input shaft is provided with the power division gear, and described power division gear is used for to the described second hydrostatic transmission transferring power.

3, the mechanical integrated driving device of vehicle hydraulic as claimed in claim 1, wherein, described first and second hydrostatic transmissions include controllable capacity pump and fixed displacement motor, and described controllable capacity pump and described fixed displacement motor are combined variable pump fixed displacement motor.

4, the mechanical integrated driving device of vehicle hydraulic as claimed in claim 1, wherein, described secondary variable part comprises first tween drive shaft and second tween drive shaft, described first tween drive shaft is provided with dual gear, described dual gear can slide at described first tween drive shaft, with quick shelves gear on described second tween drive shaft or shelves gear mesh at a slow speed.

5, the mechanical integrated driving device of vehicle hydraulic as claimed in claim 1, wherein, the described variable part, limit of taking turns comprises left and right side wheel limit driving gear, left and right side wheel limit ring gear, described left and right side wheel limit ring gear links to each other with the left and right side drive wheel.

6, the mechanical integrated driving device of vehicle hydraulic as claimed in claim 1, wherein, described left and right side planet differential device includes sun wheel, satellite gear, pinion carrier, with the outer bull gear of satellite gear, and the shared sun wheel shaft of described left and right side planet differential device, described left and right side pinion carrier connect described left and right side wheel limit driving gear respectively.

7, the mechanical integrated driving device of vehicle hydraulic as claimed in claim 1, wherein, described second hydrostatic transmission drives the outer bull gear of described satellite gear in the described left and right side planet differential device by gear transmission.

8, the mechanical integrated driving device of vehicle hydraulic as claimed in claim 7, wherein, in the described gear transmission between described second hydrostatic transmission and described left and right side planet differential device, the gear multiplication that drives described right side planet differential device drives many one-levels of gear transmission gear mesh of described left side planet differential gear.

9, the mechanical integrated driving device of vehicle hydraulic as claimed in claim 8, wherein, described gear transmission is the straight gear transmission.

10, the mechanical integrated driving device of vehicle hydraulic as claimed in claim 1, wherein, described input shaft is provided with belt pulley.

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