Integrated hydraulic system and corn harvester capable of harvesting stalks and ears

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to an integrated hydraulic system and a corn harvester capable of harvesting stalks and ears, which are suitable for the corn harvester capable of harvesting stalks and ears and comprise an engine, and the outlet end of the engine is provided with a gear to take off power and is sequentially connected with a walking pump and a working pump in series; wherein the working pump adopts a constant-pressure variable pump; and the outlet end of the constant-pressure variable pump leads to a working device on the harvester through a valve assembly. A constant-pressure variable pump is used for replacing all gear pumps, the functions of corn harvesting, peeling, stalk chopping, material boxing and the like are achieved, meanwhile, the operation action speed is controlled through a constant-pressure variable system, and the situation that flow returns to an oil tank from an overflow valve due to throttling speed regulation, and heat is generated is avoided; the hydraulic system is a constant-pressure variable system, less heat is generated, the transmission efficiency is high, and energy is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, and in particular to an integrated hydraulic system and a stalk-and-ear corn harvester. Background Art

[0002] The corn harvester for harvesting both stalks and ears is suitable for harvesting corn and fresh corn. It can realize functions such as corn harvesting, peeling, stalk chopping, and material packing. It has the advantages of high operating efficiency and harvesting both stalks and ears.

[0003] The realization of various functions in the operation process of the existing corn harvester for both ears and stalks relies on multiple pumps to control different working devices to achieve the operation. The corn harvester for both ears and stalks has a large number of working pumps due to its complex operation. Therefore, in addition to directly inserting the working pump at the power take-off port after the reserved gear of the engine, it is still necessary to set a pulley at the power take-off port of the engine flywheel, and transmit the driving force to the first-level transmission shaft through the pulley; the first-level transmission shaft then transmits the driving force to the next level through a chain or belt. After multiple transmissions, the driving force is finally transmitted to the hydraulic pump, and the hydraulic pump drives the working device to realize functions such as corn harvesting, peeling, stalk chopping, and material boxing. Too many operating pumps lead to complex hydraulic pipelines and occupy a large space; insufficient power take-off ports require mechanical transmission, which makes the corn harvester for both ears and stalks produce large noise and vibration during operation; the hydraulic system in which the traditional throttle valve controls the operating speed causes a large amount of hydraulic oil to return to the oil tank through the overflow valve, causing great energy loss.

[0004] Technical solutions of existing technology:

[0005] The stalk-and-ear corn harvester controls the operation through multiple gear pumps, and drives the gear pumps through the mechanical transmission method behind the engine gear power take-off port and the flywheel power take-off port to achieve functions such as corn harvesting, peeling, stalk chopping, and material packing; the operation speed is achieved through throttling speed regulation.

[0006] Disadvantages (technical problems) in the prior art:

[0007] 1) There are too many operating pumps. Some pumps need to drive gear pumps through mechanical transmission after the flywheel power take-off port to achieve functions such as corn harvesting, peeling, stalk chopping, and material packaging.

[0008] 2) There are too many operating pumps and the hydraulic pipelines are complicated.

[0009] 3) Throttling speed regulation to achieve the operating speed causes a large amount of hydraulic oil to return to the oil tank through the overflow valve, resulting in huge energy loss. Utility Model Content

[0010] The purpose of the utility model is to provide an integrated hydraulic system, which can solve at least one technical problem existing in the prior art.

[0011] Another object of the utility model is to provide a corn harvester for harvesting both stalks and ears of corn, which can solve at least one technical problem existing in the background technology.

[0012] The technical solution of the utility model is achieved in this way:

[0013] An integrated hydraulic system, suitable for a stalk-ear corn harvester, comprises an engine, wherein the outlet end of the engine is provided with a gear rear power take-off and is connected in series with a travel pump and a working pump in sequence;

[0014] Wherein, the working pump adopts a constant pressure variable displacement pump;

[0015] The outlet end of the constant pressure variable displacement pump leads to the working device on the harvester through a valve assembly.

[0016] Furthermore, the outlet end of the travel pump also leads to the travel system of the harvester.

[0017] Further, the valve assembly includes a first switch valve and a first speed regulating valve group;

[0018] The working device includes a throwing drum rotating motor;

[0019] A first branch pipe is arranged at the outlet end of the constant pressure variable displacement pump, a first branch pipe is arranged at the outlet end of the first branch pipe, and the first branch pipe leads to the spinning drum rotating motor;

[0020] The first switch valve is arranged on the first branch pipe, and the first speed regulating valve group is arranged on the first branch pipe.

[0021] Furthermore, the valve assembly also includes a second speed regulating valve group;

[0022] The working device also includes a throwing barrel lifting cylinder;

[0023] A second branch pipe is also provided at the outlet end of the first branch pipe, and the second branch pipe leads to the ejector lifting cylinder;

[0024] The second speed regulating valve group is arranged on the second branch pipe.

[0025] Furthermore, the valve assembly also includes a third speed regulating valve group;

[0026] The working device also includes a header lifting cylinder;

[0027] A third branch pipe is also provided at the outlet end of the first branch pipe, and the third branch pipe leads to the header lifting cylinder;

[0028] The third branch pipe is provided with the third speed regulating valve group.

[0029] Furthermore, the valve assembly also includes a fourth speed regulating valve group;

[0030] The working device also includes a grain tank lifting cylinder;

[0031] A fourth branch pipe is also provided at the outlet end of the first branch pipe, and the fourth branch pipe leads to the grain tank lifting cylinder;

[0032] The fourth branch pipe is provided with the fourth speed regulating valve group.

[0033] Furthermore, the valve assembly also includes a fifth speed regulating valve group;

[0034] The working device also includes a grass box lifting cylinder;

[0035] A fifth branch pipe is also provided at the outlet end of the first branch pipe, and the fifth branch pipe leads to the grass box lifting cylinder;

[0036] The fifth branch pipe is provided with the fifth speed regulating valve group.

[0037] Furthermore, the working device also includes a throwing roller rotation motor;

[0038] A second branch pipe is also provided at the outlet end of the constant pressure variable displacement pump, and the second branch pipe leads to the throwing roller rotation motor.

[0039] Furthermore, the working device also includes a fan back-blowing cylinder;

[0040] A third branch pipe is also arranged at the outlet end of the constant pressure variable displacement pump, and the third branch pipe leads to the fan back-blowing cylinder.

[0041] A corn harvester for harvesting both stalks and ears, comprising a working device, a traveling system, and the integrated hydraulic system;

[0042] The outlet end of the travel pump leads to the constant pressure variable pump and the travel system respectively;

[0043] The working device includes but is not limited to a throwing drum rotating motor, a throwing drum lifting cylinder, a cutting platform lifting cylinder, a grain box lifting cylinder, a grass box lifting cylinder, a throwing roller rotating motor, a fan back-blowing cylinder, and a steering cylinder.

[0044] Compared with the prior art, the beneficial effects of the utility model are:

[0045] The present application provides an integrated hydraulic system suitable for a corn harvester that harvests both stalks and ears, using a constant-pressure variable pump to replace all gear pumps to achieve functions such as corn harvesting, peeling, stalk chopping, and material packing. Due to the design of the constant-pressure variable pump, the entire hydraulic system becomes a constant-pressure variable system, and the operating speed of the harvester is controlled by the constant-pressure variable system, which can solve the problems of too many operating pumps and complex hydraulic pipelines in the prior art. Moreover, the constant-pressure variable pump can change the displacement according to the system flow requirements, accurately control the system flow, ensure the operating speed, and avoid throttling speed regulation that causes the flow to return to the oil tank from the overflow valve, generating heat. The hydraulic system is a constant-pressure variable system, which generates less heat, has high transfer efficiency, and is energy-saving. In addition, the entire integrated hydraulic system only needs one working pump to achieve the operation of all working devices of the entire vehicle (harvester), which is simpler and more reliable than the original structure of multiple operating pumps, and simplifies the overall hydraulic pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 The utility model is a schematic diagram of the integrated hydraulic system layout of the stalk-ear corn harvester.

[0048] In the figure:

[0049] 1-travel pump; 2-travel motor; 3-constant pressure variable pump; 4-throwing drum rotation motor; 5-cutting table lifting cylinder; 6-grain box lifting cylinder; 7-grass box lifting cylinder; 8-throwing drum lifting cylinder; 9-throwing roller rotation motor; 10-fan back-blowing cylinder; 11-steering cylinder;

[0050] 12-first switch valve; 13-second switch valve; 14-fan blowback valve; 15-steering gear. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0054] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0055] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0056] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0058] Example 1

[0059] Reference Figure 1The present embodiment provides an integrated hydraulic system suitable for a corn harvester for harvesting both stalks and ears, including an engine, wherein the outlet end of the engine is provided with a gear rear power take-off and is connected in series with a travel pump 1 and a working pump in sequence; wherein the gear rear power take-off is a medium for the engine power output and belongs to a gear transmission device.

[0060] The working pump is a constant pressure variable displacement pump 3, and the outlet end of the constant pressure variable displacement pump 3 is connected to the working device on the harvester through a valve assembly.

[0061] The outlet of the travel pump 1 leads to the constant pressure variable displacement pump 3 and the travel system of the harvester. Specifically, the travel system includes a travel motor 2, wherein the travel pump 1 is a closed variable displacement piston pump, the travel pump 1 drives the travel motor 2, the travel motor 2 is a closed fixed displacement piston motor, and the travel motor 2 provides torque for the whole vehicle of the harvester to travel.

[0062] The working devices on the harvester include but are not limited to the throwing drum rotating motor 4, the throwing drum lifting cylinder 8, the cutting table lifting cylinder 5, the grain box lifting cylinder 6, the grass box lifting cylinder 7, the throwing roller rotating motor 9, the fan back-blowing cylinder 10, and the steering cylinder 11. The constant pressure variable pump 3 provides power for all the working devices of the whole machine.

[0063] like Figure 1 , the following is a detailed introduction on how the hydraulic integrated system and the working device are connected:

[0064] The valve assembly includes a first switch valve 12, a first speed regulating valve group, a second speed regulating valve group, a third speed regulating valve group, a fourth speed regulating valve group and a fifth speed regulating valve group.

[0065] The outlet end of the constant pressure variable pump 3 is provided with a first branch pipe, the first switch valve 12 is provided on the first branch pipe, and the outlet end of the first branch pipe is provided with a first branch pipe, a second branch pipe, a third branch pipe, a fourth branch pipe and a fifth branch pipe.

[0066] The first branch pipe leads to the spinning drum rotating motor 4, and the first speed regulating valve group is arranged on the first branch pipe.

[0067] The second branch pipe leads to the throwing barrel lifting cylinder 8, and a second speed regulating valve group is arranged on the second branch pipe.

[0068] The third branch pipe leads to the header lifting cylinder 5, and a third speed regulating valve group is arranged on the third branch pipe.

[0069] The fourth branch pipe leads to the grain tank lifting cylinder 6, and a fourth speed regulating valve group is arranged on the fourth branch pipe.

[0070] The fifth branch pipe leads to the grass box lifting cylinder 7, and the fifth speed regulating valve group is arranged on the fifth branch pipe.

[0071] Preferably, the first speed regulating valve group, the second speed regulating valve group, the third speed regulating valve group, the fourth speed regulating valve group and the fifth speed regulating valve group are the same, and respectively include a cartridge valve and a speed regulating valve.

[0072] The outlet end of the constant pressure variable pump 3 is also provided with a second branch pipe, which leads to the throwing roller rotating motor 9. The second branch pipe is sequentially provided with a second switch valve 13, a speed regulating valve and a safety valve for protecting the throwing roller rotating motor.

[0073] A third branch pipe is also arranged at the outlet end of the constant pressure variable displacement pump 3, and the third branch pipe leads to the fan back-blowing oil cylinder 10. A fan back-blowing valve 14 is arranged on the third branch pipe.

[0074] A fourth branch pipe is also provided at the outlet end of the constant pressure variable displacement pump 3 , the fourth branch pipe leads to the steering cylinder 11 , and a steering gear 15 is provided on the fourth branch pipe.

[0075] like Figure 1 As shown, each working valve block of the integrated hydraulic system described in the present application is a closed core, which is a constant pressure variable system. More working devices can be added through a parallel circuit without the need to add other working pumps. The constant pressure variable system avoids the continuous return of hydraulic oil to the oil tank through the overflow valve, which reduces heat dissipation and saves energy. The switch valve (such as the first switch valve 12 and the second switch valve 13) and the cartridge valve described in the figure are ball valves to prevent oil from flowing through the sliding valve. The throwing barrel can be moved left and right and up and down by the throwing barrel rotating motor 4 and the throwing barrel lifting cylinder 8; the cutting table can be moved up and down by the cutting table lifting cylinder 5; the grain box can be lifted and lowered by the grain box lifting cylinder 6; the grass box can be lifted and lowered by the grass box lifting cylinder 7; and the throwing roller can deliver grain by the throwing roller rotating motor 9. The direction of the radiator fan is reversed by the fan back-blowing cylinder 10; the steering action of the entire vehicle is achieved by the steering cylinder 11. The constant-pressure variable pump 3 can change the displacement according to the system flow requirements, accurately control the system flow, ensure the operation speed, and avoid throttling speed regulation causing the flow to return to the oil tank from the overflow valve and generate heat.

[0076] The entire integrated hydraulic system uses a constant pressure variable pump 3 to replace all gear pumps in the prior art to achieve functions such as corn harvesting, peeling, stalk chopping, and material packing. Due to the design of the constant pressure variable pump 3, the entire hydraulic system becomes a constant pressure variable system, and the operating speed of the harvester is controlled by the constant pressure variable system, which can solve the problems of too many operating pumps and complex hydraulic pipelines in the prior art. Moreover, the constant pressure variable pump 3 can change the displacement according to the system flow requirements, accurately control the system flow, ensure the operating speed, and avoid throttling speed regulation causing the flow to return to the oil tank from the overflow valve, generating heat. The hydraulic system is a constant pressure variable system, which generates less heat, has high transfer efficiency, and is energy-saving. In addition, the entire integrated hydraulic system only needs one working pump to realize the operation of all working devices of the entire vehicle (harvester). Compared with the original multiple operating pumps, the structure is simple and reliable, and the overall hydraulic pipeline is simplified. At the same time, it has the advantages of overload protection, safe and reliable use, compact structure, energy saving and high efficiency.

[0077] Example 2

[0078] A corn harvester for harvesting both stalks and ears, comprising a working device, a traveling system, and the integrated hydraulic system;

[0079] The outlet end of the travel pump 1 leads to the constant pressure variable displacement pump 3 and the travel system respectively; the travel system includes a travel motor 2.

[0080] The working device includes but is not limited to a throwing drum rotating motor 4, a throwing drum lifting cylinder 8, a cutting platform lifting cylinder 5, a grain box lifting cylinder 6, a grass box lifting cylinder 7, a throwing roller rotating motor 9, a fan back-blowing cylinder 10, and a steering cylinder 11.

[0081] Specifically, the outlet of the travel pump 1 leads to the constant pressure variable pump 3 and the travel motor 2 of the harvester respectively. The travel motor 2 provides torque for the whole harvester to travel. The left and right up and down movement of the throwing drum can be realized through the throwing drum rotating motor 4 and the throwing drum lifting cylinder 8; the up and down movement of the cutting table can be realized through the cutting table lifting cylinder 5; the lifting and lowering action of the grain box can be realized through the grain box lifting cylinder 6; the lifting and lowering action of the grass box can be realized through the grass box lifting cylinder 7; the grain delivery action of the throwing roller can be realized through the throwing roller rotating motor 9. The direction reversal action of the radiator fan is realized through the fan back-blowing cylinder 10; the steering action of the whole vehicle is realized through the steering cylinder 11. The constant pressure variable pump 3 can change the displacement according to the system flow requirements, accurately control the system flow, ensure the operation speed, and avoid the throttling speed regulation causing the flow to return to the oil tank from the overflow valve, generating heat.

[0082] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0083] 1. The integrated hydraulic system is a constant pressure variable system, which generates less heat, has high transfer efficiency and saves energy.

[0084] 2. More working devices are added by setting multiple parallel circuits at the outlet end of the constant pressure variable pump 3, without the need to add other working pumps.

[0085] 3. Only one working pump is needed to realize the operation of all working devices of the harvester, which is simpler and more reliable than the multi-working pump structure in the prior art.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

[0087] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the above claims, any one of the claimed embodiments may be used in any combination. The information disclosed in this background technology section is intended only to deepen the understanding of the overall background technology of the present invention and should not be regarded as an admission or in any form of implication that the information constitutes prior art already known to those skilled in the art.

[0088] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0089] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An integrated hydraulic system, suitable for a corn harvester for harvesting both stalks and ears, characterized in that: It comprises an engine, wherein the outlet end of the engine is provided with a gear rear power take-off and is connected in series with a travel pump and a working pump in sequence; Wherein, the working pump adopts a constant pressure variable displacement pump; The outlet end of the constant pressure variable displacement pump leads to the working device on the harvester through a valve assembly.

2. The integrated hydraulic system according to claim 1, characterized in that: The outlet end of the travel pump also leads to the travel system of the harvester.

3. The integrated hydraulic system according to claim 1, characterized in that: The valve assembly includes a first switch valve and a first speed regulating valve group; The working device includes a throwing drum rotating motor; A first branch pipe is arranged at the outlet end of the constant pressure variable displacement pump, a first branch pipe is arranged at the outlet end of the first branch pipe, and the first branch pipe leads to the spinning drum rotating motor; The first switch valve is arranged on the first branch pipe, and the first speed regulating valve group is arranged on the first branch pipe.

4. The integrated hydraulic system according to claim 3, characterized in that: The valve assembly also includes a second speed regulating valve group; The working device also includes a throwing barrel lifting cylinder; A second branch pipe is also provided at the outlet end of the first branch pipe, and the second branch pipe leads to the ejector lifting cylinder; The second speed regulating valve group is arranged on the second branch pipe.

5. The integrated hydraulic system according to claim 4, characterized in that: The valve assembly also includes a third speed regulating valve group; The working device also includes a header lifting cylinder; A third branch pipe is also provided at the outlet end of the first branch pipe, and the third branch pipe leads to the header lifting cylinder; The third branch pipe is provided with the third speed regulating valve group.

6. The integrated hydraulic system according to claim 5, characterized in that: The valve assembly also includes a fourth speed regulating valve group; The working device also includes a grain tank lifting cylinder; A fourth branch pipe is also provided at the outlet end of the first branch pipe, and the fourth branch pipe leads to the grain tank lifting cylinder; The fourth branch pipe is provided with the fourth speed regulating valve group.

7. The integrated hydraulic system according to claim 6, characterized in that: The valve assembly also includes a fifth speed regulating valve group; The working device also includes a grass box lifting cylinder; A fifth branch pipe is also provided at the outlet end of the first branch pipe, and the fifth branch pipe leads to the grass box lifting cylinder; The fifth branch pipe is provided with the fifth speed regulating valve group.

8. The integrated hydraulic system according to claim 7, characterized in that: The working device also includes a throwing roller rotation motor; A second branch pipe is also provided at the outlet end of the constant pressure variable displacement pump, and the second branch pipe leads to the throwing roller rotation motor.

9. The integrated hydraulic system according to claim 8, characterized in that: The working device also includes a fan back-blowing oil cylinder; A third branch pipe is also arranged at the outlet end of the constant pressure variable displacement pump, and the third branch pipe leads to the fan back-blowing cylinder.

10. A corn harvester for harvesting both stalks and ears, comprising a working device and a traveling system, characterized in that: Also includes the integrated hydraulic system described in any one of claims 1-9; The outlet end of the travel pump leads to the constant pressure variable pump and the travel system respectively; The working device comprises a throwing drum rotating motor, a throwing drum lifting cylinder, a cutting platform lifting cylinder, a grain box lifting cylinder, a grass box lifting cylinder, a throwing roller rotating motor, a fan back-blowing cylinder, and a steering cylinder.

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