Harvester hydraulic execution system and harvester

Abstract

The utility model provides a harvester hydraulic execution system which comprises an oil tank, an execution subsystem and a header steering subsystem, wherein the execution subsystem and the header steering subsystem are arranged in parallel through an oil pump. The oil pump is connected with the oil tank and comprises a first oil outlet end and a second oil outlet end; the execution subsystem is connected with a first oil outlet end of the oil pump; the header steering subsystem is connected with a second oil outlet end of the oil pump; the execution subsystem comprises a header lifting unit and an operation unit which are arranged in parallel; the operation unit comprises a main clutch subunit, a grain unloading tube unit, a gap bridge clutch subunit, a reel wheel unit, a header profiling subunit, a grain unloading clutch subunit, a granary opening and closing subunit and a roller speed regulation subunit which are arranged in parallel; the execution subsystem comprises an arranged speed regulating valve, and the header lifting unit and the operation unit are connected in parallel through the speed regulating valve. According to the hydraulic execution system of the harvester, stable hydraulic flow can be provided, the service life of each hydraulic element is prolonged, and stable operation of the harvester is achieved.

Description

Technical Field

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

[0002] In existing technologies, the hydraulic actuators of harvesters mostly use a single solenoid valve to control the operation of each actuator. However, during harvester operation, untimely and inaccurate control responses often occur, affecting harvesting efficiency and quality. Existing hydraulic actuators often suffer from the following problems: First, changes in engine speed cause variations in the hydraulic flow rate, leading to system instability and affecting control accuracy. Second, when using throttling to control the hydraulic flow, system overheating can occur. Third, due to differences in the execution of each actuator, different working parts of the harvester have varying pressure requirements for the hydraulic system, making it difficult for a single control method to meet the needs of each actuator, thus affecting the harvester's efficiency. The pressure of multi-way solenoid valves is often provided by a fixed-displacement gear pump. At different engine speeds, the flow rate in the hydraulic actuator system is unstable, resulting in overall hydraulic instability and affecting the service life of each hydraulic component. Therefore, it is necessary to provide a harvester hydraulic actuator system and harvester to overcome the aforementioned defects. Utility Model Content

[0003] The purpose of this invention is to provide a hydraulic actuator system and harvester for a harvester, which solves the problems of unstable hydraulic flow and overheating of hydraulic components in the hydraulic control system during harvester operation.

[0004] According to one aspect of this utility model, a hydraulic actuation system for a harvester is provided, including an oil tank, an oil pump, an actuation subsystem, and a header steering subsystem; the oil pump is connected to the oil tank, and the oil pump includes a first oil outlet and a second oil outlet; the actuation subsystem is connected to the first oil outlet of the oil pump; the header steering subsystem is connected to the second oil outlet of the oil pump; the actuation subsystem and the header steering subsystem are arranged in parallel via the oil pump; the actuation subsystem includes a header lifting unit and a working unit arranged in parallel, the working unit including a main clutch subunit, a grain unloading cylinder unit, a bridge clutch unit, a reel unit, a header contouring subunit, a grain unloading clutch unit, a grain bin opening and closing unit, and a drum speed regulating subunit arranged in parallel; the actuation subsystem includes a speed regulating valve, and the header lifting unit and the working unit are connected in parallel via the speed regulating valve.

[0005] By setting up the execution subsystem and the header steering subsystem in parallel, synchronous oil supply to the execution subsystem and the header steering subsystem is achieved. The execution subsystem is equipped with a speed regulating valve, which stabilizes the pressure of the header lifting unit and the working unit passing through the speed regulating valve, and provides a stable flow to the main clutch subunit, unloading cylinder unit, bridge clutch unit, reel unit, header contouring subunit, unloading clutch unit, grain bin opening and closing unit, drum speed regulating subunit and header lifting unit as needed, so as to avoid problems such as poor execution effect and excessive heat in the header lifting unit and the working unit during the harvesting operation.

[0006] Preferably, the execution subsystem includes a first overflow valve connected in parallel with the cutting platform lifting unit and the working unit, and a first solenoid valve connected in parallel with the first overflow valve.

[0007] Preferably, the operating unit includes a second relief valve connected in parallel with the main clutch subunit, and a second solenoid valve connected in parallel with the second relief valve.

[0008] Preferably, a pressure measuring port for monitoring pressure is provided on the high-pressure oil line of the working unit.

[0009] Preferably, the cutter steering subsystem includes a cutter steering mechanism.

[0010] Preferably, the cutting platform lifting unit includes a cutting platform lifting reversing valve, and a cutting platform lifting first branch check valve is provided on the cutting platform lifting first branch connected to the cutting platform lifting cylinder; a cutting platform lifting second branch is provided with a cutting platform lifting second branch check valve, and the cutting platform lifting second branch check valve is connected to the cutting platform lifting throttle valve.

[0011] Preferably, the main clutch subunit includes a main clutch reversing valve, a main clutch first check valve is provided on the main clutch first branch connected to the main clutch cylinder, a main clutch second check valve is provided on the main clutch second branch, and a main clutch throttle valve connected to the main clutch second check valve is also provided on the main clutch second branch.

[0012] Preferably, the reel subunit includes a reel reversing valve, a reel check valve is provided on the second branch of the reel connected to the reel cylinder, and a reel throttling interface is provided on the second branch of the reel.

[0013] Preferably, the unloading cylinder subunit includes an unloading cylinder reversing valve, and a first unloading cylinder check valve and a first unloading cylinder throttling interface are provided on the first branch of the unloading cylinder connected to the unloading cylinder cylinder; a second unloading cylinder check valve and a second unloading cylinder throttling interface are provided on the second branch of the unloading cylinder connected to the unloading cylinder cylinder.

[0014] Throttling valves and throttling interfaces are set for different working units. Based on the use of speed control valves, the flow rate of each working unit is stabilized, thereby achieving stable function execution and further improving the stability and robustness of the harvester's hydraulic execution system.

[0015] This utility model also provides a harvester, including any of the harvester hydraulic actuation systems described above.

[0016] The harvester provided by this utility model achieves stable operation and further improves the reliability of harvesting operations by setting a speed regulating valve in the hydraulic execution system and setting a first overflow valve and a first solenoid valve in parallel between the header lifting unit and the working unit. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0018] Figure 1 A schematic diagram of a harvester hydraulic actuator system provided for implementation. Figure 1 .

[0019] Figure 2 A schematic diagram of a harvester hydraulic actuator system provided for implementation. Figure 2 .

[0020] Figure 3 A schematic diagram of a harvester header steering subsystem provided for implementation.

[0021] Figure 4 A schematic diagram of a harvester header lifting unit structure is provided for implementation.

[0022] Figure 5 A schematic diagram of a harvester operating unit structure is provided for implementation.

[0023] Explanation of icon numbers:

[0024] 1-Oil tank; 2-Oil pump; 21-First oil outlet; 22-Second oil outlet; 3-Actuation subsystem; 31-Heading unit lifting; 311-Heading unit lifting directional valve; 31A-Heading unit lifting first branch; 312-Heading unit lifting first branch check valve; 31B-Heading unit lifting second branch; 313-Heading unit lifting second branch check valve; 314-Heading unit lifting throttle valve; 315-Heading unit lifting cylinder; 32-Working unit; 321-Main clutch subunit; 3211-Main clutch directional valve; 3212-Main clutch cylinder; 321A-Main clutch first branch; 3213-Main clutch first check valve; 321B-Main clutch second branch; 3214-Main clutch first branch; Two one-way valves; 3215-Main clutch throttle valve; 322-Unloading cylinder subunit; 3221-Unloading cylinder reversing valve; 3222-Unloading cylinder cylinder; 322A-Unloading cylinder first branch; 3223-Unloading cylinder first one-way valve; 322B-Unloading cylinder second branch; 3224-Unloading cylinder second one-way valve; 323-Bridge clutch subunit; 3231-Bridge clutch reversing valve; 3232-Bridge clutch cylinder; 323A-Bridge clutch first branch; 3233-Bridge clutch first one-way valve; 323B-Bridge clutch second branch; 3234-Bridge clutch second one-way valve; 3235-Bridge clutch throttle valve; 324-Reel unit; 3241-Reel Reeling valve; 3242-Reel cylinder; 324B-Reel second branch; 3243-Reel first check valve; 325-Header contouring subunit; 3251-Header contouring reversing valve; 3252-Header contouring cylinder; 325A-Header contouring first branch; 325B-Header contouring second branch; 3253-Header contouring check valve; 326-Unloading clutch subunit; 3261-Unloading reversing valve; 3262-Unloading clutch cylinder; 326A-Unloading clutch first branch; 3263-Unloading clutch first check valve; 326B-Unloading clutch second branch; 3264-Unloading clutch second check valve; 3265-Unloading clutch throttle valve; 327 - Grain bin opening / closing subunit; 3271- Grain bin opening / closing reversing valve; 3272- Grain bin opening / closing cylinder; 327A- Grain bin opening / closing first branch; 327B- Grain bin opening / closing second branch; 3273- Grain bin opening / closing check valve; 328- Drum speed regulating subunit; 3281- Drum speed regulating reversing valve; 328B- Drum speed regulating second branch; 3282- Drum speed regulating check valve; 3283- Continuously variable transmission disc; 329a- Second overflow valve; 329b- Second solenoid valve; 329c- Pressure testing port; 3200- Throttling interface; 33- Speed ​​regulating valve; 34- First overflow valve; 35- First solenoid valve; 4- Cutting table steering subsystem; 41- Cutting table steering mechanism; 42- Steering cylinder. Detailed Implementation

[0025] 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.

[0026] 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."

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] See Figures 1 to 5As shown, a hydraulic actuation system for a harvester includes an oil tank 1 and an oil pump 2. The oil pump 2 is connected to the oil tank 1 and supplies oil to the actuation system. In this embodiment, the oil pump 2 is a dual pump with two outlets: a first outlet 21 connected to the actuation subsystem 3 and a second outlet 22 connected to the header steering subsystem 4. The actuation subsystem 3 and the header steering subsystem 4 are connected in parallel, and their return ports are both connected to the return port of the oil tank 1. The actuation subsystem 3 performs the harvesting function during harvester operation, driving the harvester's harvesting components. The actuation subsystem 3 includes a header lifting unit 31 and a working unit 32, which are connected in parallel. The return ports of both the header lifting unit 31 and the working unit 32 are connected to the return port of the oil tank 1. Specifically, the operating unit 32 includes a main clutch subunit 321, a grain unloading cylinder subunit 322, a bridge clutch subunit 323, a reel subunit 324, a header contouring subunit 325, a grain unloading clutch subunit 326, a grain bin opening and closing subunit 327, and a drum speed regulating subunit 328. The main clutch subunit 321, the grain unloading cylinder subunit 322, the bridge clutch subunit 323, the reel subunit 324, the header contouring subunit 325, the grain unloading clutch subunit 326, the grain bin opening and closing subunit 327, and the drum speed regulating subunit 328 are connected in parallel. The reason for using parallel connection is that oil can be supplied synchronously, and the oil supply is relatively stable, which can avoid the problems of insufficient control precision and inaccurate control caused by insufficient oil supply or unstable hydraulic system pressure. In the execution subsystem 3, a speed control valve 33 is installed. After the oil from the first outlet 21 of the oil pump 2 is discharged, it passes through the speed control valve 33 and is then used to supply oil to the lower-level system. The purpose of installing the speed control valve 33 here is to provide a stable hydraulic oil volume, preventing the operating unit 32 and the header lifting unit 31 from being affected by unstable oil supply when the oil volume is too low, thus affecting the control accuracy during the harvesting operation, and to avoid the problem of the hydraulic system overheating when the oil supply is too high.

[0032] See Figure 4 In this embodiment, the execution subsystem 3 is further provided with a first overflow valve 34, which is connected in parallel with the header lifting unit 31 and the working unit 32. By providing the first overflow valve 34, overflow in the execution subsystem 3 is prevented during harvester operation. A first solenoid valve 35 is provided in the execution subsystem 3, which is connected in parallel with the first overflow valve 34 to control the operation of the hydraulic circuit of the execution subsystem 3.

[0033] See Figure 4 , Figure 5The working unit 32 is equipped with a second relief valve 329a connected in parallel with the main clutch subunit 321. The second relief valve 329a is used to prevent overflow in the working unit 32. The second relief valve 329a includes a first relief port and a second relief port. The first relief port is connected to the high-pressure P circuit of the working unit 32, and the second relief port is connected to the low-pressure T circuit of the working unit 32. The working unit 32 also includes a second solenoid valve 329b, which is connected in parallel with the second relief valve 329a and is used to control the on / off of the hydraulic circuit of the working unit 32. Specifically, the second solenoid valve 329b is a two-position two-way valve. The first valve port of the second solenoid valve 329b is connected to the high-pressure P circuit of the working unit 32, and the second valve port is connected to the low-pressure T circuit of the working unit 32, thereby controlling the start and stop of the hydraulic circuit of the working unit 32. Preferably, the working unit 32 is also equipped with a pressure measuring port 329c for monitoring pressure. The pressure measuring port 329c is located on the high-pressure P circuit of the working unit 32.

[0034] Specifically, in the header steering subsystem 4, a header steering device 41 is set up. The high-pressure port of the steering device is connected to the second oil outlet 22 of the oil pump 2, the low-pressure port of the steering device is connected to the oil return port of the oil tank 1, the left oil outlet of the steering device is connected to the left end of the oil cylinder, and the right oil outlet of the steering device is connected to the right end of the oil cylinder. According to the selection of the oil outlet direction, the steering cylinder 42 drives the header direction to change.

[0035] In the header lifting unit 31, a header lifting directional valve 311 is provided. The oil inlet end of the header lifting directional valve 311 is connected to a speed regulating valve 33. A header lifting first branch check valve 312 is provided on the header lifting first branch 31A connected to the header lifting cylinder 315. A header lifting second branch check valve 313 is provided on the header lifting second branch 31B. At the same time, a header lifting throttle valve 314 is also connected to the header lifting second branch 31B. The oil return end of the header lifting directional valve 311 is connected to the oil return port of the cylinder to realize oil return.

[0036] In the operating unit 32, the main clutch subunit 321, the unloading cylinder subunit 322, the bridge clutch subunit 323, the reeling wheel subunit 324, the header contouring subunit 325, the unloading clutch subunit 326, the grain bin opening and closing subunit 327, and the drum speed regulating subunit 328 are connected in parallel and are each equipped with a one-way valve. In the main clutch subunit 321, the oil inlet of the main clutch reversing valve 3211 is connected to the speed control valve 33. The main clutch first branch 321A, which connects the main clutch reversing valve 3211 and the main clutch cylinder 3212, is equipped with a main clutch first check valve 3213. The main clutch second branch 321B, which connects the main clutch reversing valve 3211 and the main clutch cylinder 3212, is equipped with a main clutch second check valve 3214. The main clutch second branch 321B is also equipped with a main clutch throttle valve 3215, which is connected to the main clutch second check valve 3214. The main clutch throttle valve 3215 is connected to the main clutch second check valve 3214. In the unloading drum subunit 322, an unloading drum reversing valve 3221 is provided. The oil inlet of the unloading drum reversing valve 3221 is connected to the speed regulating valve 33, and the oil outlet of the unloading drum reversing valve 3221 is connected to the oil return port of the oil tank 1. On the first branch 322A of the unloading drum where the unloading drum reversing valve 3221 and the unloading drum cylinder 3222 are connected, an unloading drum first check valve 3223 is provided, and a throttling interface 3200 is connected at the same time. On the second branch 322B of the unloading drum where the unloading drum reversing valve 3221 and the unloading drum cylinder 3222 are connected, an unloading drum second check valve 3224 is provided, and a throttling interface 3200 is connected at the same time. In the overpass clutch subunit 323, an overpass clutch reversing valve 3231 is provided. The oil inlet end of the overpass clutch reversing valve 3231 is connected to the speed regulating valve 33. An overpass clutch first check valve 3233 is provided on the overpass clutch first branch 323A connecting the overpass clutch and the overpass clutch cylinder 3232. An overpass clutch second check valve 3234 is provided on the overpass clutch second branch 323B connecting the overpass clutch reversing valve 3231 and the overpass clutch cylinder 3232. At the same time, an overpass clutch throttle valve 3235 is connected between the overpass clutch cylinder 3232 and the overpass clutch second check valve 3234. In the reel subunit 324, a reel reversing valve 3241 is provided. The oil inlet of the reel reversing valve 3241 is connected to the speed regulating valve 33, and the oil outlet of the reel reversing valve 3241 is connected to the oil return port of the oil tank 1. A reel first check valve 3243 is provided on the second branch 324B of the reel where the reel reversing valve 3241 is connected to the reel cylinder 3242. At the same time, a throttling interface 3200 is connected between the reel first check valve 3243 and the reel cylinder 3242. Since reel cylinders 3242 are provided on both sides of the reel, the cylinders on both sides of the reel are connected in series.In the header contouring subunit 325, a header contouring directional valve 3251 is provided. The oil inlet of the header contouring directional valve 3251 is connected to the speed control valve 33, and the oil outlet of the header contouring directional valve 3251 is connected to the oil return port of the oil tank 1. On the header contouring first branch 325A and header contouring second branch 325B, which are connected to the header contouring directional valve 3251 and the header contouring cylinder 3252, a header contouring check valve 3253 and a throttling interface 3200 are provided. The header contouring check valve 3253 and the throttling interface 3200 are both connected to the header contouring cylinder 3252 to drive the header contouring operation. In the unloading clutch subunit 326, an unloading directional valve 3261 is provided. The oil inlet of the unloading directional valve 3261 is connected to the speed regulating valve 33, and the oil outlet of the unloading directional valve 3261 is connected to the oil return port of the oil tank 1. On the first unloading clutch branch 326A connecting the unloading directional valve 3261 and the unloading clutch cylinder 3262, an unloading clutch first check valve 3263 is provided. On the second unloading clutch branch 326B connecting the unloading directional valve 3261 and the unloading clutch cylinder 3262, an unloading clutch second check valve 3264 is provided. At the same time, an unloading clutch throttle valve 3265 is also connected between the unloading clutch second check valve 3264 and the unloading clutch cylinder 3262. In the grain silo opening and closing subunit 327, a grain silo opening and closing reversing valve 3271 is provided. The oil inlet of the grain silo opening and closing reversing valve 3271 is connected to the speed regulating valve 33, and the oil outlet of the grain silo opening and closing reversing valve 3271 is connected to the return oil port. On the first branch 327A of the grain silo opening and closing connecting the grain silo opening and closing reversing valve 3271 and the grain silo opening and closing cylinder 3272, and on the second branch 327B of the grain silo opening and closing, a grain silo opening and closing check valve 3273 and a throttling interface 3200 are connected to hydraulically drive the opening and closing of the grain silo. In the drum speed regulation subunit 328, a drum speed regulation reversing valve 3281 is provided. The oil inlet of the drum speed regulation reversing valve 3281 is connected to the speed regulation valve 33, and the oil outlet of the drum speed regulation reversing valve 3281 is connected to the oil return port of the oil tank 1. On the second branch 328B of drum speed regulation, which connects the drum speed regulation reversing valve 3281 and the continuously variable transmission disc 3283, a drum speed regulation check valve 3282 and a throttling interface 3200 are connected to realize the speed regulation of the transmission disc. In this embodiment, the working unit 32 integrates the hydraulic actuators of each working unit 32 by setting an eight-way solenoid valve, thereby driving the harvester to perform operations and realizing stable hydraulic drive.

[0037] The harvester is equipped with the hydraulic actuator system described above, which enables stable hydraulic transmission between the various actuators and avoids hydraulic instability. Stable hydraulic distribution is achieved by installing a speed regulating valve 33 in the hydraulic actuator system, and stable operation is achieved by installing throttle valves in the oil circuits of each actuator to control the flow to the cylinders.

[0038] 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 hydraulic actuator system for a harvester, characterized in that, include: tank; An oil pump connected to the oil tank, the oil pump including a first oil outlet and a second oil outlet; An execution subsystem is connected to the first oil outlet end of the oil pump; A header steering subsystem, wherein the header steering subsystem is connected to the second oil outlet of the oil pump; The execution subsystem and the cutting table steering subsystem are connected in parallel via the oil pump; The execution subsystem includes a header lifting unit and an operation unit arranged in parallel. The operation unit includes a main clutch subunit, a grain unloading cylinder unit, a bridge clutch unit, a reel unit, a header contouring subunit, a grain unloading clutch unit, a grain bin opening and closing unit, and a drum speed regulating subunit arranged in parallel. The execution subsystem includes a speed control valve, and the cutting platform lifting unit and the working unit are connected in parallel through the speed control valve.

2. The harvester hydraulic actuation system as described in claim 1, characterized in that, The execution subsystem includes a first overflow valve connected in parallel with the cutting platform lifting unit and the working unit, and a first solenoid valve connected in parallel with the first overflow valve.

3. The harvester hydraulic actuation system as described in claim 2, characterized in that, The operating unit includes a second overflow valve connected in parallel with the main clutch subunit, and a second solenoid valve connected in parallel with the second overflow valve.

4. The harvester hydraulic actuation system as described in claim 3, characterized in that, The high-pressure oil circuit of the working unit is equipped with a pressure measuring port for monitoring pressure.

5. A harvester hydraulic actuation system as described in claim 4, characterized in that, The cutter steering subsystem includes a cutter steering mechanism.

6. A harvester hydraulic actuation system as described in claim 5, characterized in that, The cutting platform lifting unit includes a cutting platform lifting reversing valve, and a cutting platform lifting first branch check valve is provided on the cutting platform lifting first branch connected to the cutting platform lifting cylinder; a cutting platform lifting second branch check valve is provided on the cutting platform lifting second branch, and the cutting platform lifting second branch check valve is connected to the cutting platform lifting throttle valve.

7. A harvester hydraulic actuation system as described in claim 6, characterized in that, The main clutch subunit includes a main clutch reversing valve. A main clutch first check valve is provided on the main clutch first branch connected to the main clutch cylinder. A main clutch second check valve is provided on the main clutch second branch. A main clutch throttle valve connected to the main clutch second check valve is also provided on the main clutch second branch.

8. A harvester hydraulic actuation system as described in claim 7, characterized in that, The reel unit includes a reel reversing valve, and a reel check valve is provided on the second branch of the reel connected to the reel cylinder. A reel throttling interface is provided on the second branch of the reel.

9. A harvester hydraulic actuation system as described in claim 8, characterized in that, The unloading cylinder subunit includes an unloading cylinder reversing valve. The first branch of the unloading cylinder, which is connected to the unloading cylinder cylinder, is equipped with a first unloading cylinder check valve and a first unloading cylinder throttling interface. The second branch of the unloading cylinder, which is connected to the unloading cylinder cylinder, is equipped with a second unloading cylinder check valve and a second unloading cylinder throttling interface.

10. A harvester, characterized in that, Includes any of the harvester hydraulic actuators as described in claims 1-9.

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