A hydraulic and mechanical integrated motion control system for the collection device of a sugarcane harvester

Abstract

The present invention discloses a machine - liquid integrated motion control system for a collection device of a sugarcane harvester, which is installed on the main body of the sugarcane harvester. The system includes a collection device, a control device, and a self - locking structure. The collection device includes a bracket, a rocker arm, a connecting rod, a hopper, and a swing bracket. The rocker arm and the connecting rod are respectively hinged between the bracket and the swing bracket, and the hopper is hinged to the swing bracket. The control device includes a tipping cylinder, a pushing cylinder, a hydraulic oil circuit, a reversing valve, and an oil pump. The pushing cylinder is hinged between the bracket and the rocker arm, the tipping cylinder is hinged between the hopper and the swing support. The tipping cylinder and the pushing cylinder are arranged in parallel and are respectively connected to the hydraulic oil circuit through the reversing valve. The self - locking structure includes a pull rod and a lock catch. A cross pin is provided on the hopper. The pull rod is hinged between the rocker arm and the lock catch, and the lock catch is hinged to the swing bracket and is buckled upward on the cross pin. The present invention combines hydraulic control with machinery, simplifies the hydraulic system of the collection hopper during multiple mechanical actions, and reduces the layout difficulty and construction cost of the hydraulic system.

Description

Technical Field

[0001] The present invention relates to the technical field of sugarcane harvesters, and in particular to a hydraulic-mechanical integrated motion control system for the collection device of a sugarcane harvester. Background Art

[0002] The segmental sugarcane harvester is a type of sugarcane harvester that is currently widely used. Its current sugarcane collection methods mainly include conveyors, mesh bags, and collection hoppers. Among them, compared with the conveyor, the collection hopper can improve the adaptability of the harvester in small plots, without the need for a transport vehicle to follow, and the harvesting method is more flexible. Compared with the mesh bag collection device, the collection hopper has a large loading capacity, flexible and fast unloading, saving the cost of the mesh bag and the labor cost of hanging the mesh bag.

[0003] The collection and conveying device of the segmental sugarcane harvester mainly includes conveyors, mesh bags, and collection hoppers. Among them, the collection hopper can improve the operation ability of small and medium-sized harvesters in small plots and has many advantages. However, its collection and unloading generally involve multiple mechanical actions, and the harvester itself has a compact structure. Therefore, the mechanical action sequence of most collection hoppers has strict requirements, which makes the hydraulic actuators of multiple actions need to be controlled separately, making the hydraulic control system redundant, increasing the cost of the hydraulic system, and also increasing the complexity and operation difficulty of the machine. Once an operation error occurs, it may cause great damage to the harvester, and even trigger a safety accident in severe cases. Some manufacturers have made electrical control anti-misoperation devices, but due to the complex and changeable working environment of the harvester, the reliability of the electrical anti-misoperation operating system is greatly challenged. Summary of the Invention

[0004] To solve the problems of the redundant operating system, high cost, easy misoperation caused by the strict sequence requirements of multiple mechanical actions of the existing collection hopper, and the low reliability of the electrical anti-misoperation operating system under complex working conditions, the present invention proposes a hydraulic-mechanical integrated motion control system for the collection device of a sugarcane harvester, which combines hydraulic control with machinery, simplifies the hydraulic system of the collection hopper during multiple mechanical actions, and reduces the layout difficulty and construction cost of the hydraulic system.

[0005] The present invention adopts the following technical solutions to achieve the above object:

[0006] A hydraulic-mechanical integrated motion control system for the collection device of a sugarcane harvester is installed on the main body of the sugarcane harvester, and includes a collection device, a control device, and a self-locking structure. The collection device includes a bracket, a rocker arm, a connecting rod, a hopper, and a swing bracket. The bracket is fixedly installed behind the main body of the sugarcane harvester, the swing bracket is installed parallel to the upper part of the bracket, the rocker arm and the connecting rod are sequentially hinged on the bracket and the swing bracket from left to right, and the hopper is hinged at one end of the swing bracket away from the rocker arm;

[0007] The control device includes a tipping cylinder, a pushing cylinder, a hydraulic oil circuit, a reversing valve and an oil pump. The hydraulic oil circuit is provided on the main body of the sugarcane harvester. The reversing valve and the oil pump are respectively installed on the hydraulic oil circuit. Opposite ends of the pushing cylinder are respectively hinged to a bracket and a rocker arm. Opposite ends of the tipping cylinder are respectively hinged to a hopper and a swing bracket. The tipping cylinder and the pushing cylinder are arranged in parallel and are respectively connected to the hydraulic oil circuit through the reversing valve;

[0008] The self-locking structure includes a pull rod and a lock catch. A cross pin is provided on the hopper. Two ends of the pull rod are respectively hinged to the rocker arm and the lock catch. One end of the lock catch away from the pull rod is hinged to the swing bracket and is buckled upward on the cross pin.

[0009] Preferably, a cleaning fan is further provided behind the main body of the sugarcane harvester, and the cleaning fan is located above the bracket.

[0010] Preferably, the rocker arm, the connecting rod, the bracket and the swing bracket form a quadrilateral structure.

[0011] Preferably, the hopper and the swing bracket are hinged through a connecting shaft.

[0012] Preferably, the hopper includes a bottom plate, side enclosures and a surrounding rod. Opposite ends of the side enclosures are respectively connected to the bottom plate and the surrounding rod. The surrounding rod is hinged to one end of the swing bracket away from the rocker arm and is rotatable relative to the swing bracket. When the hopper is in a contracted state, the bracket, the rocker arm, the connecting rod and the swing bracket are located on the same side of the hopper.

[0013] Preferably, opposite ends of the rocker arm are respectively hinged to the left ends of the bracket and the swing bracket. Opposite ends of the connecting rod are respectively hinged to the middle parts of the bracket and the swing bracket. The hopper is hinged to the right end of the swing bracket; One end of the tipping cylinder is hinged to the middle part of the swing bracket, and the other end is hinged to the hopper, and the hinge point of the tipping cylinder and the hopper does not coincide with the hinge point of the hopper and the swing bracket.

[0014] Preferably, an oil inlet and an oil outlet are provided on the hydraulic oil circuit. The tipping cylinder and the pushing cylinder are respectively connected to the oil inlet and the oil outlet of the hydraulic oil circuit through the reversing valve.

[0015] The beneficial effects of the present invention are:

[0016] The integrated mechanical and hydraulic motion control system of the collection device of the sugarcane harvester of the present invention simplifies the hydraulic system of the collection hopper during multiple mechanical operations, reduces the layout difficulty and construction cost of the hydraulic system, and ensures the correctness of the working sequence of multiple mechanisms of the device by combining the hydraulic system with the mechanical structure. Compared with the traditional method of controlling each action separately or ensuring the mechanical action sequence through sensor detection, it is safer, easier to operate, and can adapt to more harsh environments. Moreover, the simple hydraulic control system and mechanical self-locking structure are less affected by the external environment, improving the adaptability of the harvester to complex and changeable environments. This system uses a mechanical self-locking structure for the collection hopper to ensure that when two mechanical actions are controlled by the same reversing valve, no errors occur, guaranteeing the safety of the equipment and operators and eliminating potential safety hazards caused by misoperation from the device itself.

[0017] The integrated mechanical and hydraulic motion control system of the collection device of the sugarcane harvester of the present invention reduces the operation difficulty of the collection hopper, making it easier for operators to get started and improving the operability. The simplification of the operation method makes the discharging action of the device continuous, improves the discharging efficiency, reduces the time used, reduces the impact of discharging on the harvesting time of the harvester, and ensures the effective harvesting time of the harvester. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic structural diagram of the integrated mechanical and hydraulic motion control system of the collection device of the sugarcane harvester provided by the present invention;

[0019] Figure 2 FIG. is an unfolded schematic diagram of the integrated mechanical and hydraulic motion control system of the collection device of the sugarcane harvester provided by the present invention;

[0020] Figure 3 FIG. is a schematic diagram of the spatial positions of the locking buckle and the cross pin in the integrated mechanical and hydraulic motion control system of the collection device of the sugarcane harvester provided by the present invention;

[0021] Figure 4 FIG. is a schematic diagram showing the relative position change of the locking buckle and the cross pin when the pushing oil cylinder moves from the starting point to the end point in the integrated mechanical and hydraulic motion control system of the collection device of the sugarcane harvester provided by the present invention;

[0022] Figure 5 FIG. is a hydraulic control schematic diagram of the integrated mechanical and hydraulic motion control system of the collection device of the sugarcane harvester provided by the present invention.

[0023] In the figure, 1 - sugarcane harvester main body, 2 - bracket, 3 - rocker arm, 4 - connecting rod, 5 - hopper, 6 - swing bracket, 7 - tipping oil cylinder, 8 - pushing oil cylinder, 9 - hydraulic oil circuit, 10 - reversing valve, 11 - pull rod, 12 - locking buckle, 13 - cross pin, 14 - impurity removal fan. DETAILED DESCRIPTION OF THE INVENTION

[0024] The following is combined with the attachedFigures 1-5 and the specific implementation manners will be used to describe the present invention in detail.

[0025] Please also refer to Figures 1-5 , an integrated mechanical and hydraulic motion control system for the collection device of a sugarcane harvester provided by an embodiment of the present invention is installed on the main body 1 of the sugarcane harvester, and includes a collection device, a control device and a self-locking structure. The collection device includes a bracket 2, a rocker arm 3, a connecting rod 4, a hopper 5 and a swing bracket 6. The bracket 2 is fixedly installed at the rear of the main body 1 of the sugarcane harvester, the swing bracket 6 is installed parallel to the upper part of the bracket 2, the rocker arm 3 and the connecting rod 4 are successively hinged on the bracket 2 and the swing bracket 6 from left to right, and the hopper 5 is hinged at one end of the swing bracket 6 away from the rocker arm 3;

[0026] The control device includes a tipping cylinder 7, a pushing cylinder 8, a hydraulic oil circuit 9, a reversing valve 10 and an oil pump. The hydraulic oil circuit 9 is arranged on the main body 1 of the sugarcane harvester, and the reversing valve 10 and the oil pump are respectively installed on the hydraulic oil circuit 9. The opposite ends of the pushing cylinder 8 are respectively hinged on the bracket 2 and the rocker arm 3, the opposite ends of the tipping cylinder 7 are respectively hinged on the hopper 5 and the swing bracket 6, the tipping cylinder 7 and the pushing cylinder 8 are arranged in parallel and are respectively connected to the hydraulic oil circuit 9 through the reversing valve 10;

[0027] The self-locking structure includes a pull rod 11 and a lock catch 12. A cross pin 13 is provided on the hopper 5. The two ends of the pull rod 11 are respectively hinged on the rocker arm 3 and the lock catch 12, and one end of the lock catch 12 away from the pull rod 11 is hinged on the swing bracket 6 and is buckled upward on the cross pin 13.

[0028] The operation of the hydraulic-mechanical integrated motion control system of the collection device of the sugarcane harvester of the present invention includes two actions, namely, the pushing action and the tipping and discharging action, which are executed by the same set of hydraulic cylinders. These two mechanical actions have strict sequence requirements and are irreversible. During the discharging operation, the tipping can only be performed when the pushing reaches the limit position. When resetting, the hopper must first retract to the starting position before the pushing mechanism can be reset. Based on this, the pushing cylinder 8 and the tipping cylinder 7 are arranged in parallel, controlled by the same hydraulic oil circuit 9 and the same reversing valve 10. Combined with a reasonable mechanical layout, when the hopper 5 performs the pushing action in the fully loaded state, the feedback pressure of the pushing cylinder 8 is less than that of the tipping cylinder 7, and it will act first. When the pushing cylinder 8 reaches the limit position, the pressure of the hydraulic oil circuit 9 rises to reach the working pressure of the tipping cylinder 7, and the tipping cylinder 7 will work until it extends to the limit position. When the reversing valve 10 changes direction and the system performs the reset action, the feedback pressure of the tipping cylinder 7 is less than that of the pushing cylinder 8. The tipping cylinder 7 first retracts to the starting position, and the pressure of the hydraulic oil circuit 9 continues to rise to reach the working pressure of the pushing cylinder 8, then the pushing cylinder 8 retracts, and the entire device retracts to the initial position. To avoid the problem that when only controlled by the hydraulic system, due to temperature or system failures, the instantaneous pressure difference between the two groups of cylinders is not obvious, which may lead to incorrect actions, a self-locking structure is added to the hopper 5. During the extension process of the pushing cylinder 8, the hopper 5 is always in a state locked by the self-locking structure until the pushing cylinder 8 extends to the limit position, and the hopper 5 is automatically unlocked under the action of gravity, and then the tipping cylinder 7 can act.

[0029] Specifically, during the discharging operation, first, control the reversing valve 10 to change direction to connect the channel between the pushing cylinder 8 and the hydraulic oil circuit 9, and then start the oil pump to supply hydraulic oil from the hydraulic oil circuit 9 to the pushing cylinder 8. At this time, the feedback pressure of the pushing cylinder 8 is less than that of the tipping cylinder 7, so that the pushing cylinder 8 extends, pushing the rocker arm 3 to rotate, and pushing the swing bracket 6, the hopper 5 and the tipping cylinder 7 as a whole. During this process, the rocker arm 3 and the swing bracket 6 rotate relative to each other, driving the pull rod 11 and the lock 12 to rotate, so that the lock 12 rotates relative to the swing bracket 6, but the hopper 5 has no tipping action under the action of the pull rod 11 and the lock 12. When the pushing cylinder 8 extends to the limit position, turn off the oil pump and stop pumping oil. The lock 12 also rotates to the limit position and disengages from the cross pin 13 under the action of gravity, that is, the hopper 5 is released, as Figure 3At this time, the push cylinder 8 remains extended, the pressure of the hydraulic oil circuit 9 rises, reaches the working pressure of the tipping cylinder 7, controls the reversing valve 10 to reverse, so as to connect the channel between the tipping cylinder 7 and the hydraulic oil circuit 9. After that, start the oil pump, so that the hydraulic oil circuit 9 supplies hydraulic oil to the tipping cylinder 7, thereby making the tipping cylinder 7 start to act, pushing the hopper 5 to rotate clockwise around the swing bracket 6. When the tipping cylinder 7 extends to the limit position, the hopper 5 also rotates to the unloading limit position to realize unloading. At this time, turn off the oil pump and control the reversing valve 10 to close the channel between the tipping cylinder 7 and the hydraulic oil circuit 9, so that the tipping cylinder 7 maintains the extended action, thereby making the hopper 5 maintain the unloading action. The unloaded sugarcane can be dumped into the bucket of a transfer loader or a small transfer vehicle for transfer until the unloading is completed.

[0030] After the unloading is completed, the system needs to be reset. When the system is reset, first, control the reversing valve 10 to connect the channel between the tipping cylinder 7 and the hydraulic oil circuit 9, and start the oil pump. At this time, the feedback pressure of the tipping cylinder 7 is less than that of the push cylinder 8, so that the hydraulic oil in the tipping cylinder 7 is drawn back into the hydraulic oil circuit 9. After the pumping is completed, control the reversing valve 10 and the oil pump to close. Then, through the reasonable distribution of the center of gravity of the device, that is, the bottom end of the hopper 5 is heavier than the open end, so that the center of gravity of the hopper 5 is located at the bottom, so that the tipping cylinder 7 retracts first under the action of the gravity of the hopper 5. During this process, the push cylinder 8 will not act. When the tipping cylinder 7 retracts counterclockwise to the limit position, it drives the hopper 5 to rotate counterclockwise and retract to the initial position. Then, control the reversing valve 10 to reverse to connect the channel between the push cylinder 8 and the hydraulic oil circuit 9, and start the oil pump. At this time, the pressure of the hydraulic oil circuit 9 continues to rise, reaches the working pressure of the push cylinder 8, so that the hydraulic oil in the push cylinder 8 is drawn back into the hydraulic oil circuit 9, and the push cylinder 8 will execute the retracting action, driving the swing bracket 6, the hopper 5, the tipping cylinder 7 and the latch 12 to retract to the initial state as a whole. After the pumping is completed, control the reversing valve 10 and the oil pump to close. At this time, the pull rod 11 and the latch 12 lock the cross pin 13 of the hopper 5 again, and the device and the system are reset. When resetting, the hopper 5 must retract to the starting position first before the pushing mechanism can be reset.

[0031] It is worth mentioning that when the hopper 5 is pushed out, through the pull rod 11 and the latch 12, it is ensured that there is no tipping action during the pushing. When the hopper 5 rotates clockwise around the swing bracket 6 to the limit position, at this time the opening of the hopper 5 faces downward, so that the sugarcane can be poured out of the hopper 5. When the hopper is retracted after unloading, combined with the design of the center of gravity position of the hopper of the whole working device, the tipping cylinder 7 is always under pressure and the push cylinder 8 is always under tension during the hopper retraction process, so as to ensure that the tipping cylinder 7 falls freely during resetting and the push cylinder 8 has no retracting action. There are strict sequence requirements for the two mechanical actions of the pushing action and the tipping unloading, which are irreversible. When unloading, it is necessary to push to the limit position before tipping.

[0032] As a preference of the above-described embodiment, the hydraulic oil circuit 9 is provided with an oil inlet and an oil outlet, and the tipping cylinder 7 and the pushing cylinder 8 are respectively connected to the oil inlet and the oil outlet of the hydraulic oil circuit 9 through a reversing valve 10.

[0033] As a preference of the above-described embodiment, a cleaning fan 14 is further provided behind the main body 1 of the sugarcane harvester, and the cleaning fan 14 is located above the bracket 2.

[0034] As a preference of the above-described embodiment, the rocker arm 3, the connecting rod 4, the bracket 2 and the swing bracket 6 form a quadrilateral structure to form a stable structure, ensure the smoothness of unloading, and at the same time facilitate the pushing cylinder 8 to extend to the limit position, so that the swing bracket 6 and the hopper 5 extend outwards the longest distance to avoid the cleaning fan 14. The hopper 5 is hinged to the swing bracket 6 through a connecting shaft. When the tipping cylinder 7 operates, it pushes the hopper 5 to rotate clockwise or counterclockwise around the connecting shaft between the swing bracket 6 and the hopper 5.

[0035] As a preference of the above-described embodiment, the hopper 5 includes a bottom plate, side enclosures and a surrounding rod. The opposite ends of the side enclosures are respectively connected to the bottom plate and the surrounding rod. The surrounding rod is hinged to one end of the swing bracket 6 far from the rocker arm 3 and is rotatable relative to the swing bracket 6. When the hopper 5 is in the contracted state, the bracket 2, the rocker arm 3, the connecting rod 4 and the swing bracket 6 are located on the same side of the hopper 5, and the hopper 5 rotates along the space on the side of the swing bracket 6 to prevent the hopper 5 from affecting the operation of the tipping cylinder 7 and the pushing cylinder 8 during the rotation process. When the tipping cylinder 7 retracts counterclockwise to the limit position, the surrounding rod and the swing bracket 6 are arranged side by side, and the bottom plate and the bracket 2 are arranged side by side.

[0036] As a preference of the above-described embodiment, the opposite ends of the rocker arm 3 are respectively hinged to the left end of the bracket 2 and the swing bracket 6, the opposite ends of the connecting rod 4 are respectively hinged to the middle parts of the bracket 2 and the swing bracket 6, and the hopper 5 is hinged to the right end of the swing bracket 6. One end of the tipping cylinder 7 is hinged to the middle part of the swing bracket 6, and the other end is hinged to the surrounding rod of the hopper 5, and the hinge point of the tipping cylinder 7 and the hopper 5 does not coincide with the hinge point of the hopper 5 and the swing bracket 6 to prevent the force arm of the tipping cylinder 7 from being too small, resulting in an increase in the power of the tipping cylinder 7 and causing energy waste.

[0037] It can be understood that the control mode of the tipping cylinder 7 can be opening and closing through manual control or through an electric control mode. The control mode of the pushing cylinder 8 can be opening and closing through manual control or through an electric control mode. During the process that the tipping cylinder 7 and the pushing cylinder 8 are respectively connected to the hydraulic oil circuit 9 through the reversing valve 10, the control mode of the oil circuit conversion of the reversing valve 10 can be manual control or control through an electric control mode.

[0038] Although the present invention has been described in detail in the foregoing with specific embodiments, modifications or improvements can be made thereto based on the present invention, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention fall within the scope of the present invention claimed.

Claims

1. A hydraulic-mechanical integrated motion control system for the collection device of a sugarcane harvester, installed on the main body (1) of the sugarcane harvester, characterized in that, It includes a collection device, a control device and a self-locking structure. The collection device includes a bracket (2), a rocker arm (3), a connecting rod (4), a hopper (5) and a swing bracket (6). The bracket (2) is fixedly installed at the rear of the sugarcane harvester main body (1). The swing bracket (6) is installed in parallel above the bracket (2). The rocker arm (3) and the connecting rod (4) are successively hinged on the bracket (2) and the swing bracket (6) from left to right. The hopper (5) is hinged at one end of the swing bracket (6) away from the rocker arm (3). The control device includes a tipping cylinder (7), a pushing cylinder (8), a hydraulic oil circuit (9), a reversing valve (10) and an oil pump. The hydraulic oil circuit (9) is arranged on the sugarcane harvester main body (1). The reversing valve (10) and the oil pump are respectively installed on the hydraulic oil circuit (9). The opposite ends of the pushing cylinder (8) are respectively hinged on the bracket (2) and the rocker arm (3). The opposite ends of the tipping cylinder (7) are respectively hinged on the hopper (5) and the swing bracket (6). The tipping cylinder (7) and the pushing cylinder (8) are arranged in parallel and are respectively connected to the hydraulic oil circuit (9) through the reversing valve (10); when the hopper (5) performs a pushing action in the full-load state, the feedback pressure of the pushing cylinder (8) is less than that of the tipping cylinder (7). When the system performs a reset action, the feedback pressure of the tipping cylinder (7) is less than that of the pushing cylinder (8). When the hopper is closed after unloading, considering the design of the center of gravity position of the hopper of the entire working device, the tipping cylinder (7) is always under pressure and the pushing cylinder (8) is always under tension during the process of closing the hopper; The self-locking structure includes a pull rod (11) and a lock catch (12). A cross pin (13) is provided on the hopper (5). The two ends of the pull rod (11) are respectively hinged on the rocker arm (3) and the lock catch (12). One end of the lock catch (12) away from the pull rod (11) is hinged on the swing bracket (6) and is buckled upward on the cross pin (13).

2. The hydraulic-mechanical integrated motion control system of the cane harvester collection device according to claim 1, wherein A cleaning fan (14) is also provided at the rear of the sugarcane harvester main body (1). The cleaning fan (14) is located above the bracket (2).

3. The hydraulic-mechanical integrated motion control system of the sugarcane harvester collection device according to claim 1, characterized in that The rocker arm (3), the connecting rod (4), the bracket (2) and the swing bracket (6) form a quadrilateral structure.

4. The hydraulic and mechanical integrated motion control system of the collection device of the sugarcane harvester according to claim 1, wherein The hopper (5) and the swing bracket (6) are hinged through a connecting shaft.

5. The hydraulic-mechanical integrated motion control system of the cane harvester collection device according to claim 1, characterized in that, The hopper (5) includes a bottom plate, side enclosures and a surrounding rod. The opposite ends of the side enclosures are respectively connected to the bottom plate and the surrounding rod. The surrounding rod is hinged at one end of the swing bracket (6) away from the rocker arm (3) and is rotatable relative to the swing bracket (6). When the hopper (5) is in a contracted state, the bracket (2), the rocker arm (3), the connecting rod (4) and the swing bracket (6) are located on the same side of the hopper (5).

6. The hydraulic-mechanical integrated motion control system of the collection device of the sugarcane harvester according to claim 1, wherein The opposite ends of the rocker arm (3) are respectively hinged on the left end of the bracket (2) and the swing bracket (6). The opposite ends of the connecting rod (4) are respectively hinged in the middle of the bracket (2) and the swing bracket (6). The hopper (5) is hinged at the right end of the swing bracket (6); one end of the tipping cylinder (7) is hinged in the middle of the swing bracket (6), and the other end is hinged on the hopper (5), and the hinge point of the tipping cylinder (7) and the hopper (5) does not coincide with the hinge point of the hopper (5) and the swing bracket (6).

7. The hydraulic-mechanical integrated motion control system of the sugarcane harvester collection device according to claim 1, wherein, An oil inlet and an oil outlet are provided on the hydraulic oil circuit (9), and the tipping cylinder (7) and the pushing cylinder (8) are respectively connected to the oil inlet and the oil outlet of the hydraulic oil circuit (9) through a reversing valve (10).

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