CN218093736U - Paddy field working vehicle - Google Patents

Abstract

The utility model relates to an agricultural machine field discloses a paddy field operation car, and this paddy field operation car includes hydraulic system (1), power device (4) and is used for the cooling system of this power device (4), and this cooling system has and connects through water intake pipe (41) and outlet pipe way (42) radiator (5) of power device (4), the fluid circulation circuit of hydraulic system (1) passes through radiator (5) to the permission by the at least part fluid that fluid circulation circuit carried flows this radiator (5) and gives off through this radiator (5) the heat of fluid. The paddy field working vehicle can realize high-efficiency heat dissipation of oil in a hydraulic system, so that adverse effects on the service life of components, the performance of the whole machine and the like caused by the rise of the oil temperature are avoided or reduced; because a radiator independent of a water cooling system is not required to be arranged for the hydraulic system, the arrangement is convenient, and obvious adverse effect on the cooling efficiency of the power device can be avoided.

Description

Paddy field working vehicle

Technical Field

The utility model relates to an agricultural machine specifically relates to a paddy field operation car.

Background

In paddy field work vehicles such as rice transplanters and rice seedling throwers, a HydroStatic continuously variable Transmission (HST) is generally used to transmit power from an engine to perform functions such as traveling. The hydraulic system adopts a natural cooling mode, the heat dissipation efficiency of hydraulic oil is low, and the oil temperature is easily increased during long-time operation, so that the performance of the whole machine is influenced.

To this end, a separate oil-cooled radiator may be provided to facilitate the dissipation of the heat carried by the hydraulic oil. However, because the paddy field working vehicle has small volume and compact structure, the arrangement of an independent oil-cooled radiator for a hydraulic system increases the difficulty of component arrangement. Moreover, if the arrangement form is not reasonable, the oil-cooled radiator and the water-cooled radiator for the engine may have adverse effects on each other, for example, the oil-cooled radiator may affect the heat dissipation efficiency of the water-cooled radiator, thereby being unfavorable for cooling the engine.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the inconvenient quick radiating problem of hydraulic oil in the paddy field work car that prior art exists, providing a paddy field work car, this paddy field work car can make the high-efficient heat dissipation of fluid among its hydraulic system to avoid or reduce because of the adverse effect that the oil temperature risees and lead to, still can not increase the part in the paddy field work car simultaneously and arrange the degree of difficulty, and be convenient for effectively avoid the adverse effect to the cooling efficiency such as being the power device of engine.

In order to achieve the above object, an aspect of the present invention provides a paddy field working vehicle, including hydraulic system, power device and a cooling system for the power device, the cooling system has a radiator connected with a water outlet pipeline through a water inlet pipeline, the hydraulic system has a fluid circulation loop passing through the radiator, so as to allow the heat of the fluid to be dissipated by at least part of the fluid carried by the fluid circulation loop flowing through the radiator.

Preferably, the power plant is provided as an engine formed with a cooling water passage, and the water inlet line and the water outlet line are respectively connected to the cooling water passage to form a cooling liquid circulation circuit.

Preferably, the radiator has a water-cooled radiator disposed in the coolant circulation circuit and an oil-cooled radiator disposed in the oil circulation circuit, the water-cooled radiator and the oil-cooled radiator being integrally provided side by side with each other.

Preferably, the radiator is arranged on a longitudinally forward or laterally outer side of the engine, and the cooling system has a cooling fan arranged between the engine and the radiator, the cooling fan being drivingly connected to a power take-off shaft of the engine so as to be drivable to cause an air flow into a suction air flow from a side of the radiator facing away from the engine and to remove heat from the oil and coolant flowing through the radiator by causing the air flow to flow through the radiator.

Preferably, the paddy field working vehicle further comprises a transmission case and a hydrostatic continuously variable transmission connected to the transmission case, an oil drain port of the hydrostatic continuously variable transmission is communicated to an oil inlet of the radiator through a pipeline, and the hydraulic system comprises a hydraulic pump, an oil outlet of which is communicated to the hydrostatic continuously variable transmission through an oil passage formed in the transmission case.

Preferably, the hydrostatic continuously variable transmission and the hydraulic pump are mounted to both lateral sides of the transmission, respectively.

Preferably, an oil outlet of the hydraulic pump is connected to a torque generator through an oil line, and an oil passage formed in the transmission case can receive the oil from the hydraulic pump through the torque generator.

Preferably, the paddy field working vehicle has a front axle on which the front wheels are mounted, and the transmission is mounted on the front axle.

Preferably, an oil suction port of the hydraulic pump is communicated with an inner cavity of the gearbox, the gearbox is installed to enable the inner cavity to be communicated with an axle housing cavity of the front axle, the front axle is provided with an oil return port, the oil return port is communicated to an oil outlet of the radiator through an oil liquid pipeline, and the oil liquid radiated by the radiator can enter the axle housing cavity through the oil return port.

Preferably, the paddy field operation vehicle is a rice transplanter or a rice seedling thrower.

Through the technical scheme, the utility model discloses a paddy field operation car makes the heat that fluid carried outwards give off through making hydraulic system's fluid circulation circuit through the radiator that is used for power device to can realize the high-efficient heat dissipation of fluid among the hydraulic system, thereby avoid or reduce because of the oil temperature risees the adverse effect to aspects such as part life and complete machine performance that lead to. Meanwhile, a radiator independent of a water cooling system is not required to be arranged for the hydraulic system, so that arrangement in the paddy field working vehicle is facilitated, and obvious adverse effects on the cooling efficiency of the power device cannot be generated.

Drawings

Fig. 1 is a plan view of a mounting structure of a hydraulic system, an engine and a cooling system thereof in a paddy field working vehicle according to a preferred embodiment of the present invention;

FIG. 2 is a schematic illustration of the engine and wheels of FIG. 1 with the engine and wheels removed;

FIG. 3 is a right side view of the structure shown in FIG. 2;

FIG. 4 is a cross-sectional view showing the direction of oil flow within the transmission and front axle of FIG. 2;

FIG. 5 isbase:Sub>A schematic cross-sectional view taken along A-A in FIG. 2;

fig. 6 is a left side view of the structure shown in fig. 1 with the engine removed.

Description of the reference numerals

1-a hydraulic system; 2-a gearbox; 3-a front axle; 3 a-left bridge leg; 3 b-right bridge leg; 31-oil return port; 4-a power plant; 41-a water inlet pipeline; 42-water outlet pipeline; 5-a radiator; 6-a hydraulic pump; 7-a first oil line; 8-a first joint; 9-a second joint; 10-a torque generator; 11-a second oil line; 12-a first hose; 13-a hydraulic valve; 14-a third oil line; 15-a third linker; 16-hydrostatic continuously variable transmission; 17-a fourth joint; 18-a fourth oil line; 19-a second hose; 20-a third hose; 21-a fifth joint; 22-sixth junction.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It should be understood that the description herein is provided for illustration and explanation of the invention and is not intended to limit the invention.

In the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, left, and right" generally means upper, lower, left, and right as illustrated with reference to the accompanying drawings; "inner and outer" refer to the inner and outer relative to the profile of the components themselves. Further, the term "longitudinal" used herein refers to a front-rear direction in which the paddy field vehicle normally travels (i.e., a left-right direction as viewed in fig. 1), and "lateral" refers to a horizontal direction perpendicular to the longitudinal direction (i.e., an up-down direction as viewed in fig. 1), in which case the "front side in the longitudinal direction" refers to a side in a forward direction in which the paddy field vehicle normally travels; the "laterally outer side" refers to a side away from the vehicle body in a horizontal direction perpendicular to the longitudinal direction.

Fig. 1 schematically shows parts of a system and components of a paddy field working vehicle according to a preferred embodiment of the present invention, including a hydraulic system 1, a power unit 4, and a cooling system for the power unit 4, the cooling system having a radiator 5. The power unit 4 may be an internal combustion engine such as a diesel engine or an electric motor powered by a power battery, and may be formed with a cooling water channel, which is communicated to the radiator 5 through a water inlet pipe 41 and a water outlet pipe 42 (see fig. 6). The cooling water in the cooling water channel can take away heat generated in the working process of the power device 4, enters the radiator 5 through the water inlet pipeline 41, exchanges heat with air flowing through the radiator 5 after entering the radiator 5, and flows back to the cooling water channel of the power device 4 through the water outlet pipeline 42 after being cooled, so that the cooling water is continuously circulated, and the power device 4 works at a proper temperature.

To the inconvenient problem of dispelling the heat fast or relevant parts are inconvenient to be arranged of hydraulic oil among the current paddy field operation car, the utility model provides an among the paddy field operation car, hydraulic system 1's fluid circulation circuit is through above-mentioned radiator 5, and this fluid circulation circuit carries at least partial fluid can flow through this radiator 5 and outwards give off the heat through this radiator 5. Therefore, the radiator 5 has a water cooling function and an oil cooling function at the same time, and can enable a part of air flow to exchange heat with oil liquid flowing through the radiator 5 in an oil liquid circulation loop while enabling the air flow to exchange heat with cooling water flowing through the air flow, so that heat carried in the oil liquid is emitted outwards, efficient heat dissipation of the oil liquid in the hydraulic system 1 can be achieved, and adverse effects on the service life of components, the performance of the whole machine and the like caused by oil temperature rising are avoided or reduced. Meanwhile, through the arrangement of the paddy field working vehicle, since the hydraulic system 1 is not required to be provided with a radiator independent of a water cooling system (namely, a cooling system), each functional component is convenient to arrange in the paddy field working vehicle, and obvious adverse effect on the cooling efficiency of the power device 4 is not generated.

In the case where the power unit 4 is provided as an engine, a cooling water passage of the engine is connected to the water inlet pipe 41 and the water outlet pipe 42, and is capable of communicating with the radiator 5 through the water inlet pipe 41 and the water outlet pipe 42, thereby forming a coolant circulation circuit, a part of which is formed in the radiator 5. Similarly, a part of the oil circulation circuit of the hydraulic system 1 is also formed in the radiator 5, but the oil circulation circuit and the coolant circulation circuit are independent of each other in the radiator 5, and the oil and the coolant have respective flow paths and should be arranged such that no or little heat exchange occurs therebetween.

To this end, the radiator 5 may have a water-cooled radiator element disposed in the coolant circulation circuit and an oil-cooled radiator element disposed in the oil circulation circuit, each of which may be formed in the form of a radiating fin or tube, so as to exchange heat between the cooling water and the oil therein, respectively, and the air flow passing through the radiator 5. The water-cooled heat dissipation member and the oil-cooled heat dissipation member may be integrated side by side, for example, mounted on the same frame and coplanar with the mounting reference, so that the air flow passing through the heat sink 5 may exchange heat with the water-cooled heat dissipation member and the oil-cooled heat dissipation member when being sucked, thereby ensuring the heat dissipation effect of the oil in the engine and the hydraulic system 1.

For example, as shown in fig. 1 to 3 and 6 in conjunction, the radiator 5 may be disposed laterally outside (shown as the right side) the engine, and have a water-cooled radiator and an oil-cooled radiator located longitudinally rearward of the water-cooled radiator, and in other embodiments, the oil-cooled radiator may be disposed longitudinally forward of the water-cooled radiator. When air flow is sucked into the radiator 5 from the right side of the vehicle body, one part of the air flow exchanges heat with cooling water in the water-cooled radiator, and the other part of the air flow exchanges heat with oil liquid in the oil-cooled radiator, so that the respective heat dissipation efficiency can be ensured, and the arrangement in the paddy field working vehicle with a relatively compact structure is facilitated. In an alternative embodiment, the radiator 5 may also be arranged longitudinally forward of the engine, i.e. in front of the engine, whereby the windward side of its direction of advance provides an air flow to the radiator 5, but this may result in the oil line needing to extend a longer distance, increasing the risk of oil leakage. Further, the radiator 5 may have a wind scooper for guiding the flow of air to be sucked into the radiator 5 at the positions where the water-cooled radiator and the oil-cooled radiator are located.

In order to ensure sufficient air flow, the cooling system may be provided with a cooling fan located between the engine and the radiator 5, which cooling fan may receive the power of the engine to produce a rotation that causes the air flow to enter the radiator 5. Wherein the cooling fan can be driven such that an air flow enters from a side (i.e., an outer side) of the radiator fan 5 facing away from the engine and flows through the radiator 5 to take away its heat by exchanging heat with the oil and the cooling water flowing through the radiator 5, achieving efficient cooling.

In a paddy field work vehicle such as a rice transplanter or a rice transplanter, the hydraulic system 1 can be used for power steering, variable speed assist, driving a working device, etc., to realize more intelligent and controllable traveling and working functions. Referring to fig. 2 to 5, a paddy field working vehicle according to a preferred embodiment of the present invention is provided with a transmission 2 and a hydrostatic continuously variable transmission 16 connected to the transmission 2, whereby power from an engine can be set to be transmitted from the hydrostatic continuously variable transmission 16 to the transmission 2, so that the paddy field working vehicle can have better controllability and environmental suitability, a desired vehicle speed can be selected by a simple operation of a shift lever, and intelligent control can be facilitated by using electric components such as an electromagnetic proportional valve.

The hydraulic pump 6 can be used to supply the hydrostatic continuously variable transmission 16 with oil required for its operation. For this purpose, an oil passage, through which the hydraulic pump 6 in the hydraulic system 1 can supply oil to the hydrostatic continuously variable transmission 16, may be formed in the transmission 2 so as to communicate with the oil inlet 16a of the hydrostatic continuously variable transmission 16. In order to fully utilize the lateral space on the paddy field working vehicle, the hydrostatic continuously variable transmission 16 and the hydraulic pump 6 may be mounted to both lateral sides of the transmission 2, respectively.

In addition to the hydrostatic continuously variable transmission 16 described above, the hydraulic pump 6 may be configured to provide oil to the torque generator 10 for power steering. To this end, the oil outlet of the hydraulic pump 6 may be connected to a torque generator 10 via a first oil line 7. Since the hydrostatic continuously variable transmission 16 has a relatively small oil demand, it can be supplied with oil from the hydraulic pump 6 by communicating with the torque generator 10.

In the preferred embodiment shown, the oil outlet of the hydraulic pump 6 is connected to a first oil line 7, the first oil line 7 being connected to a first connection 8, the first connection 8 being connected to an oil inlet of a torque generator 10, whereby the hydraulic pump 6 is able to supply oil to the torque generator 10.

An oil outlet of the torque generator 10 is connected with a second joint 9, the second joint 9 is connected with a second oil pipeline 11, the second oil pipeline 11 is connected with a first hose 12, and one end, far away from the second oil pipeline 11, of the first hose 12 is connected to an oil inlet of a hydraulic valve 13. An oil outlet of the hydraulic valve 13 is connected with a third oil pipeline 14, the third oil pipeline 14 is connected with a third joint 15, and the third joint 15 is installed on the gearbox 2 and is communicated with an oil duct inside the gearbox 2. An oil passage inside the transmission case 2 communicates with an oil inlet 16a of the hydrostatic continuously variable transmission 16, whereby oil supplied from the hydraulic pump 6 can be obtained through the torque generator 10.

The oil drain port of the hydrostatic continuously variable transmission 16 is connected with a fourth joint 17, the fourth joint 17 is connected with a fourth oil pipeline 18, the fourth oil pipeline 18 is connected with a second hose 19, and the second hose 19 is connected with a fifth joint 21 mounted on an oil inlet of the radiator 5, so that the oil drained from the hydrostatic continuously variable transmission 16 can enter the radiator 5 to realize quick cooling.

An oil outlet of the radiator 5 is connected with a sixth joint 22, the sixth joint 22 is connected with a third hose 20, the third hose 20 is connected with an oil return port 31 formed on a right bridge leg 3b of the front axle 3, a cavity inside the right bridge leg 3b is communicated with an internal cavity of the transmission case 2, and an oil suction port of the hydraulic pump 6 is communicated with the internal cavity of the transmission case 2, so that oil can be sucked from the transmission case 2 to form an oil circulation loop.

As shown in fig. 4, the left side of the transmission case 2 is connected to the left leg 3a of the front axle 3, the right side of the transmission case is connected to the right leg 3b of the front axle 3, an internal cavity of the transmission case 2 is communicated with axle housing cavities on the left and right sides of the front axle 3, and the third hose 20 is connected to the oil return port 31 on the right leg 3 b. In other embodiments, the oil return port 31 may also be formed on the left bridge leg 3a, and the third hose 20 is communicated with the internal cavity of the transmission case 2 through the internal cavity of the left bridge leg 3 a.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. The technical idea of the utility model within the scope, can be right the utility model discloses a technical scheme carries out multiple simple variant, makes up with any suitable mode including each concrete technical feature. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations. However, these simple modifications and combinations should also be considered as disclosed in the present invention, and all fall within the scope of protection of the present invention.

Claims (10)

1. A paddy field work vehicle, characterized by comprising a hydraulic system (1), a power plant (4) and a cooling system for the power plant (4), the cooling system having a radiator (5) connected to the power plant (4) by a water inlet line (41) and a water outlet line (42), an oil circulation circuit of the hydraulic system (1) passing through the radiator (5) to allow at least part of the oil delivered by the oil circulation circuit to flow through the radiator (5) and dissipate heat of the oil through the radiator (5).

2. Paddy field work vehicle according to claim 1, characterized in that the power plant (4) is arranged as an engine formed with a cooling water channel to which the water inlet line (41) and the water outlet line (42) are connected, respectively, to form a cooling liquid circulation circuit.

3. The paddy field work vehicle according to claim 2, characterized in that the radiator (5) has a water-cooled radiator disposed in the coolant circulation circuit and an oil-cooled radiator disposed in the oil circulation circuit, which are integrally provided side by side with each other as one body.

4. Paddy field work vehicle according to claim 2, characterized in that the radiator (5) is arranged on the longitudinal front side or laterally outside of the engine, and the cooling system has a cooling fan arranged between the engine and the radiator (5) which is drive-connected to the power take-off shaft of the engine to be drivable to draw in an air flow from the side of the radiator (5) facing away from the engine and to take away heat from the oil and coolant flowing through the radiator (5) by causing the air flow to flow through the radiator (5).

5. The paddy field work vehicle according to claim 1, characterized in that the paddy field work vehicle further comprises a transmission case (2) and a hydrostatic continuously variable transmission (16) connected to the transmission case (2), a drain port of the hydrostatic continuously variable transmission (16) is communicated to an oil inlet of the radiator (5) through a pipe, and the hydraulic system (1) comprises a hydraulic pump (6), an oil outlet of the hydraulic pump (6) is communicated to the hydrostatic continuously variable transmission (16) through an oil passage formed in the transmission case (2).

6. Paddy field work vehicle according to claim 5, characterized in that the hydrostatic continuously variable transmission (16) and the hydraulic pump (6) are mounted to the transmission (2) on both lateral sides, respectively.

7. Paddy field work vehicle according to claim 5, characterized in that an oil outlet of the hydraulic pump (6) is connected with a torque generator (10) through an oil line, and an oil passage formed in the transmission case (2) is capable of receiving the oil from the hydraulic pump (6) through the torque generator (10).

8. A vehicle according to claim 5, characterized in that it has a front axle (3) with front wheels mounted thereon, said gearbox (2) being mounted on the front axle (3).

9. Paddy field work vehicle according to claim 8, characterized in that an oil suction opening of the hydraulic pump (6) communicates with an inner cavity of the gearbox (2), the gearbox (2) is mounted such that the inner cavity communicates with an axle housing cavity of the front axle (3), and the front axle (3) is provided with an oil return opening (31), the oil return opening (31) communicates with an oil outlet of the radiator (5) through an oil line, and the oil radiated through the radiator (5) can enter the axle housing cavity through the oil return opening (31).

10. The paddy field work vehicle as claimed in claim 1, wherein the paddy field work vehicle is a rice transplanter or a seedling thrower.

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