Harvester hydraulic control system and harvester

Abstract

The harvester hydraulic control system comprises an oil pump provided with a first oil outlet and a second oil outlet in parallel, a first execution unit connected with the first oil outlet and a priority valve connected with the second oil outlet, and the priority valve comprises a first port and a second port. The chassis execution unit is connected with the first port, and the second execution unit and the third execution unit are connected with the second port in parallel; wherein the first execution unit comprises a cluster box lifting system, a grass bin lifting system and a cluster box lifting system which are arranged in parallel; the second execution unit comprises a cluster box overturning system and a grass bin overturning system which are arranged in parallel; and the first execution unit and the second execution unit are synchronously driven to realize synchronous lifting and overturning of the cluster box and the grass bin. The harvester hydraulic control system and the harvester have the advantages of being stable and high in reliability, the service life of the whole harvester hydraulic control system is long, and the operation efficiency of the harvester can be remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic control of agricultural machinery, and in particular to a hydraulic control system for a harvester and a harvester. Background Technology

[0002] The hay bin and ear box of a corn harvester that harvests both stalks and ears are equipped with a discharge drive mechanism to tilt and unload the harvested stalks and ears. This mechanism typically involves hydraulic cylinders mounted on the support frame of the hay bin and ear box to drive their lifting and tilting. However, existing harvesters on the market, due to their hydraulic circuitry, cannot achieve simultaneous tilting and lifting during the unloading process. A predetermined procedure must be followed; for example, during unloading, the hay bin must first be raised to a designated unloading height before the tilting function is executed. This prevents simultaneous lifting and tilting, resulting in low unloading efficiency and significantly reducing the overall harvester's operating efficiency. Therefore, it is necessary to provide a harvester hydraulic control system that enables simultaneous lifting and tilting of the ear box and hay bin, saving unloading time and improving the harvester's hydraulic control efficiency to overcome the aforementioned shortcomings. Utility Model Content

[0003] The purpose of this invention is to provide a hydraulic control system and harvester that can solve the problem that the ear box and hay bin of a corn harvester that harvests both stalks and ears cannot be lifted and flipped simultaneously.

[0004] According to one aspect of this utility model, a hydraulic control system for a harvester is provided, comprising an oil pump, a first execution unit, a chassis execution unit, a second execution unit, a third execution unit, and a priority valve; the oil pump is provided with a first oil outlet and a second oil outlet connected in parallel; the first execution unit is connected to the first oil outlet and includes a grain box lifting system and a hay bin lifting system connected in parallel; the priority valve is connected to the second oil outlet and includes a first port and a second port; the chassis execution unit is connected to the first port and drives the harvester to move and turn; the second execution unit and the third execution unit are connected in parallel to the second port for operation of various functional modules of the harvester; the second execution unit includes a grain box tilting system and a hay bin tilting system connected in parallel; the first execution unit and the second execution unit synchronously drive the grain box lifting system, the hay bin lifting system, the grain box tilting system, and the hay bin tilting system to realize synchronous lifting and tilting of the grain bin and the hay bin.

[0005] The first and second oil outlets supply oil to the first and second execution units, respectively. The hay bin lifting system and the ear-bear box lifting system in the first execution unit, and the hay bin tilting system and the ear-bear box tilting system in the second execution unit are controlled by two independent hydraulic oil circuits, and can be operated independently, performing both lifting and tilting functions at the same time.

[0006] Preferably, the second execution unit further includes a platform tilting system, which is connected in parallel with the ear box overturning system; the second execution unit includes an ear box overturning cylinder and a platform tilting cylinder, which are connected in parallel.

[0007] Preferably, the second execution unit includes a first sequence valve and a second sequence valve, wherein the first sequence valve is disposed on the oil inlet line of the ear box tilting cylinder; and the second sequence valve is disposed on the oil return line of the platform tilting cylinder.

[0008] Preferably, the first oil outlet is equipped with a first filter, and the second oil outlet is equipped with a second filter; the oil discharge rate of the first oil outlet is greater than the oil discharge rate of the second oil outlet.

[0009] Preferably, the first execution unit includes a first overflow valve and a first reversing valve, the first reversing valve being connected in parallel with the ear-shaped box lifting system or the hay bin lifting system; the first overflow valve being connected in parallel with the ear-shaped box lifting system or the hay bin lifting system; and a first pressure testing port being provided on the oil inlet line of the first execution unit.

[0010] Preferably, the hay box lifting system includes a hay bin lifting cylinder and a support cylinder connected in parallel with the hay bin lifting cylinder.

[0011] Preferably, the first execution unit further includes a fan backflushing system, which includes a third reversing valve and a third relief valve. The third reversing valve is connected to the fan backflushing cylinder. The working pressure of the third relief valve is less than the working pressure of the first relief valve.

[0012] Preferably, the chassis actuator includes a steering sensor, the priority valve further includes a load-sensitive feedback port, the high-pressure end of the chassis actuator is connected to the first port, the steering sensor is connected to the load-sensitive feedback port, and the second port is connected to the oil inlet circuit of the second actuator and the third actuator.

[0013] Preferably, the third execution unit includes a header clutch system, and the first execution unit includes a harvester main clutch system.

[0014] Preferably, the third execution unit includes a second overflow valve and a second directional valve, the second overflow valve being connected in parallel with the cutting table clutch system, and the second directional valve being connected in parallel with the cutting table clutch system; a second pressure test port is also provided on the oil inlet line of the third execution unit.

[0015] The embodiments also provide a harvester including any of the harvester hydraulic control systems described above.

[0016] The present invention provides a hydraulic control system for a harvester and a harvester, which has the following advantages:

[0017] It can improve the hydraulic control efficiency of harvesters, and can realize the synchronous operation of the ear box tilting system, hay bin tilting system, ear box lifting system, and hay bin lifting system, ensuring the safety of harvester operation; the whole machine hydraulic control system is stable and highly reliable, and has a long service life, which can improve the harvester's operating efficiency. Attached Figure Description

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0019] Figure 1 A schematic diagram of a hydraulic control system for a harvester is provided for implementation purposes.

[0020] Figure 2 A schematic diagram of a harvester hydraulic control system provided for implementation.

[0021] Explanation of icon numbers:

[0022] 100-Harvester hydraulic control system; 10-Oil pump; 11-First oil outlet; 111-First filter; 12-Second oil outlet; 121-Second filter; 20-First actuator; 21-Harvest box lifting system; 22-Hay bin lifting system; 221-Hay bin lifting cylinder; 222-Support cylinder; 23-Fan backflushing system; 231-Third directional valve; 232-Third relief valve; 233-Fan backflushing cylinder; 24-Harvester main clutch system; 201-First relief valve; 202-First directional valve; 203-First pressure gauge Port; 30-Priority valve; 301-First port; 302-Second port; 303-Load-sensitive feedback port; 40-Chassis actuator; 41-Steering sensor; 50-Second actuator; 51-Harvest box tilting system; 52-Hay bin tilting system; 53-Platform tilting system; 51-Harvest box tilting cylinder; 531-Platform tilting cylinder; 532-First sequence valve; 533-Second sequence valve; 60-Third actuator; 61-Cutting platform clutch system; 601-Second overflow valve; 602-Second directional valve; 603-Second pressure test port. Detailed Implementation

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0025] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0026] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0029] See Figures 1 to 2As shown, the embodiment provides a hydraulic control system for a harvester, including an oil pump 10, which is a dual pump with a first oil outlet 11 and a second oil outlet 12. A first execution unit 20 is connected to the first oil outlet 11. A chassis execution unit 40, a second execution unit 50, and a third execution unit 60 are connected in parallel and connected to the second oil outlet 12 through a priority valve 30. The second priority valve 30 includes a first port 301 and a second port 302. The chassis execution unit 40 is connected to the first port 301, and the second execution unit 50 and the third execution unit 60 are connected to the second port 302. Specifically, the first execution unit 20 includes a corn box lifting system 21 and a hay bin lifting system 22 connected in parallel. The second execution unit 50 includes a corn box tilting system 51 and a hay bin tilting system 52, which are also connected in parallel. Since the first execution unit 20 and the second execution unit 50 are supplied with oil through the first oil outlet 11 and the second oil outlet 12 respectively, the harvester operator can operate the hay bin with one button, improving the harvester's unloading efficiency. Taking the hay bin unloading process as an example, during the driver's one-button unloading of the hay bin, the first oil outlet 11 supplies oil to the hay bin lifting system 22, and the second oil outlet 12 supplies oil to the hay bin tilting system 52. The two execution actions are performed through separate oil circuits, thus allowing the lifting and tilting actions of the hay bin to be executed simultaneously, thereby improving the unloading efficiency of the hay bin. The third execution unit 60 is connected in parallel with the second execution unit 50. The third execution unit 60 is equipped with the harvester's functional modules to complete other functions of the harvesting operation. Because the first execution unit 20, the second execution unit 50, the third execution unit 60, and the chassis drive execution unit are connected in parallel, the functions of each execution unit are independent, thus improving the harvester's operating efficiency. Since the second oil outlet 12 is first connected to the priority valve 30, and the first port 301 of the priority valve 30 is connected to the chassis execution unit 40, while the second port 302 is connected to both the second execution unit 50 and the third execution unit 60, the first port 301 of the priority valve 30 is the priority flow port, and the second port 302 is the excess flow port. Therefore, the oil circuit of the second oil outlet 12 prioritizes supply to the chassis execution unit 40. The steering actuator in the chassis execution unit 40 enables the harvester to turn. During the turning process, the second execution unit 50 and the third execution unit 60 cannot operate, ensuring the harvester's operational safety.

[0030] In an optional embodiment, the second execution unit 50 is further provided with a platform tilting system 53, which is connected in parallel with the ear box overturning system 51 to ensure the safety and reliability of the ear box overturning process and prevent the harvester from tipping over due to the shift in the center of gravity of the ear box during ear unloading. The second execution unit 50 is provided with an ear box overturning cylinder 51 and a platform tilting cylinder 531, which are connected in parallel. In a specific embodiment, the second execution unit 50 is further provided with a first sequence valve 532 and a second sequence valve 533. The first sequence valve 532 is located on the oil inlet line of the ear box overturning cylinder 51, and the second sequence valve 533 is located on the oil return line of the platform tilting cylinder 531. During the unloading of the ear of fruit, a first sequence valve 532 is installed to supply oil to the platform tilting cylinder 531. When the pressure in this oil circuit reaches a certain threshold, the first sequence valve 532 opens to supply oil to the ear box tilting cylinder 51, driving the ear box to tilt. During the return operation of the ear box, a second sequence valve 533 is installed. The ear box tilting cylinder 51 returns to its original position first. After the ear box tilting cylinder 51 returns to its original position, the second sequence valve 533 opens to drive the platform tilting cylinder 531 to return to its original position, thereby ensuring the safety of the ear box tilting process.

[0031] In the specific hydraulic control system, to ensure oil quality and prevent blockage of the hydraulic oil circuit, a first filter 111 is installed at the first oil outlet 11, and a second filter 121 is installed at the second oil outlet 12. The oil discharge capacity of the first oil outlet 11 is greater than that of the second oil outlet 12. The reason why the oil discharge capacity of the first oil outlet 11 is greater than that of the second oil outlet 12 is that the first oil outlet 11 is connected to the first execution unit 20, which is equipped with the harvester's main clutch system 24, which supplies power to the entire harvester. The second execution unit 50 and the third execution unit 60 do not work simultaneously with the chassis execution unit 40. Therefore, the load on the first execution unit 20 is greater than that on the second execution unit 50, the third execution unit 60, and the chassis execution unit 40. The different discharge capacities of the first oil outlet 11 and the second oil outlet 12 ensure the robustness of the harvester's overall hydraulic control system. Furthermore, a header clutch system 61 is provided in the third execution unit 60. Therefore, the main clutch system 24 and the header clutch system 61 of the harvester can be operated independently. The header of the harvester can be started and operated independently without opening the main clutch system 24 of the harvester, thereby reducing the fuel consumption of the harvester and saving energy.

[0032] In a specific implementation, the first execution unit 20 is equipped with a first overflow valve 201 and a first reversing valve 202. The first reversing valve 202 is connected in parallel with the ear box lifting system 21 or the hay bin lifting system 22. One end of the first reversing valve 202 is connected to the oil inlet circuit of the first execution unit 20, and the other end of the first reversing valve 202 is connected to the oil return circuit of the first execution unit 20. The first overflow valve 201 is configured in the same way as the first reversing valve 202 in the first execution unit 20. The first execution unit 20 is also equipped with a first pressure measuring port 203 for detecting the pressure value in the first execution unit 20. The third execution unit 60 is equipped with a second relief valve 601 and a second directional valve 602. One end of the second directional valve 602 is connected to the oil inlet circuit of the third execution unit 60, and the other end is connected to the oil return circuit of the third execution unit 60. Simultaneously, the second relief valve 601 and the second directional valve 602 are connected in parallel within the third execution unit 60 and are also connected in parallel with the header clutch system 61. A second pressure test port 603 is also provided on the oil inlet circuit of the third execution unit 60 to detect the working pressure of the hydraulic control system in the third execution unit 60. Because the second relief valve 601, the second directional valve 602, and the second pressure test port 603 are located within the third execution unit 60, a failure in the second execution unit 50 will not affect the normal operation of the third execution unit 60, thus improving the reliability of the harvester's hydraulic control system.

[0033] In a preferred embodiment, the hay bin lifting system 22 includes a hay bin lifting cylinder 221 and a support cylinder 222 connected in parallel with the hay bin lifting cylinder 221. The support cylinder 222 is mounted on the harvester chassis. The purpose of the support cylinder 222 is to ensure the stability of the harvester and prevent the harvester from tipping over during the unloading process of the hay bin.

[0034] In a preferred embodiment, the first execution unit 20 is further provided with a fan backflushing system 23. The fan backflushing system 23 is connected in parallel with the hay bin lifting system 22 or the fruit box lifting system 21. The fan backflushing system 23 includes a third reversing valve 231 connected in parallel with the first reversing valve 202 and a third overflow valve 232 connected at one end to the oil inlet of the fan backflushing cylinder 233 and at the other end to the oil return of the first execution unit 20. The working pressure of the third overflow valve 232 is less than the working pressure of the first overflow valve 201. The purpose of this arrangement is to prevent damage to the fan backflushing cylinder 233.

[0035] In a specific implementation, the first port 301 of the priority valve 30 is the priority flow port, and the second port 302 is the redundant flow port. Additionally, a load-sensitive feedback port 303 is provided. The chassis execution unit 40 includes a steering sensor 41. Specifically, the high-pressure end of the chassis execution unit 40 is connected to the first port 301, and the steering sensor 41 is connected to the load-sensitive feedback port 303. When the chassis sensor detects chassis steering, it sends a signal to the load-sensitive feedback port 303. The second port 302 is connected to the oil inlet circuits of the second execution unit 50 and the third execution unit 60. If the load-sensitive feedback port 303 does not receive a signal from the chassis sensor, the second oil outlet 12 supplies oil to the priority valve 30, and the first port 301 supplies oil to the chassis execution unit 40. However, since the oil circuit of the chassis execution unit 40 is blocked, the second port 302 supplies oil to both the second execution unit 50 and the third execution unit 60.

[0036] The harvester hydraulic control system provided in this embodiment can realize the synchronous operation of the hay bin lifting system 22, the ear box lifting system 21, the hay bin tilting system 52, and the ear box tilting system 51, thereby improving the harvester's operating efficiency. At the same time, since the harvester's main clutch system 24 and the header clutch system 61 are controlled by independent hydraulic circuits, the harvester using this hydraulic control system is safe, stable, efficient, and can save production costs. This type of harvester has a long service life, excellent operating effect, and can improve harvesting efficiency.

[0037] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. A harvester hydraulic control system, characterized by, include: An oil pump, wherein the oil pump is provided in parallel with a first oil outlet and a second oil outlet; The first execution unit is connected to the first oil outlet. The first execution unit includes a fruit box lifting system and a hay bin lifting system arranged in parallel. A priority valve, which is connected to the second oil outlet, includes a first port and a second port; A chassis execution unit is connected to the first port and drives the harvester to move and turn. The second and third execution units are connected in parallel to the second port for operation of various functional modules of the harvester. The second execution unit includes a fruit box turning system and a hay barn turning system, wherein the fruit box turning system and the hay barn turning system are connected in parallel; The first execution unit and the second execution unit synchronously drive the ear-shaped box lifting system, the hay bin lifting system, the ear-shaped box tilting system, and the hay bin tilting system to realize the synchronous lifting and tilting of the ear-shaped box and the hay bin.

2. A harvester hydraulic control system as claimed in claim 1 wherein, The second execution unit further includes a platform tilting system, which is connected in parallel with the ear-box overturning system; the second execution unit includes an ear-box overturning cylinder and a platform tilting cylinder, which are connected in parallel.

3. A harvester hydraulic control system as claimed in claim 2, wherein, The second execution unit includes a first sequence valve and a second sequence valve. The first sequence valve is located on the oil inlet line of the ear box tilting cylinder; the second sequence valve is located on the oil return line of the platform tilting cylinder.

4. A harvester hydraulic control system as claimed in claim 3 wherein, The first oil outlet is equipped with a first filter, and the second oil outlet is equipped with a second filter; the oil discharge rate of the first oil outlet is greater than the oil discharge rate of the second oil outlet.

5. A harvester hydraulic control system as claimed in claim 3 wherein, The first execution unit includes a first overflow valve and a first reversing valve. The first reversing valve is connected in parallel with the ear box lifting system or the hay bin lifting system. The first overflow valve is connected in parallel with the ear box lifting system or the hay bin lifting system. A first pressure test port is also provided on the oil inlet line of the first execution unit.

6. A harvester hydraulic control system as claimed in claim 5 wherein, The hay bale lifting system includes a hay bale lifting cylinder and a support cylinder connected in parallel with the hay bale lifting cylinder.

7. A harvester hydraulic control system as claimed in claim 6 wherein, The first execution unit further includes a fan backflushing system, which includes a third reversing valve and a third relief valve. The third reversing valve is connected to the fan backflushing cylinder. The working pressure of the third relief valve is less than the working pressure of the first relief valve.

8. A harvester hydraulic control system as claimed in claim 7, wherein, The chassis actuator includes a steering sensor, the priority valve also includes a load-sensitive feedback port, the high-pressure end of the chassis actuator is connected to the first port, the steering sensor is connected to the load-sensitive feedback port, and the second port is connected to the oil inlet circuit of the second actuator and the third actuator.

9. A harvester hydraulic control system as claimed in claim 8 wherein, The third execution unit includes a header clutch system, and the first execution unit includes a harvester main clutch system.

10. A harvester hydraulic control system as claimed in claim 9, wherein, The third execution unit includes a second relief valve and a second directional valve. The second relief valve is connected in parallel with the cutting table clutch system, and the second directional valve is connected in parallel with the cutting table clutch system. A second pressure test port is also provided on the oil inlet line of the third execution unit.

11. A harvester characterized in that, Includes the harvester hydraulic control system as described in any one of claims 1-10.

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