Throwing cylinder rotation driving hydraulic system and corn machine

Abstract

The utility model provides a throwing cylinder rotation driving hydraulic system and a corn machine, the throwing cylinder rotation driving hydraulic system comprises a cycloid motor, a brake and a shuttle valve which are integrally arranged, and a power output shaft of the cycloid motor is connected with a rotating shaft of a throwing cylinder; the brake is arranged on a power output shaft of the cycloid motor; the cycloid motor and the shuttle valve are both communicated with the oil inlet pipeline, and the cycloid motor and the shuttle valve are both communicated with the oil return pipeline; the third end of the shuttle valve is communicated with a control oil inlet of the brake through a control hydraulic pipeline; a control oil outlet of the brake is communicated with a control oil return opening of the cycloid motor through a control hydraulic pipeline. The braking of the throwing cylinder mainly depends on the friction force of a friction plate in the brake, belongs to mechanical braking, and is good in braking effect and high in reliability; when the throwing cylinder is fixed at a position for a long time, the situation that the braking effect is reduced due to internal leakage generated by a hydraulic system, and the throwing cylinder swings slightly is avoided, and the pointing accuracy of the throwing cylinder is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic systems, in particular to a throwing drum rotation driving hydraulic system and a corn machine. Background Art

[0002] At present, for wheeled corn harvesters, silage harvesters and ear and stalk harvesters, after the stalks are chopped, they are thrown into the hay box of the whole machine or the compartment of the freight vehicle that moves with the whole machine through a throwing barrel. In order to evenly distribute the hay in the hay box or to facilitate the adjustment of the position of the freight vehicle and the whole machine, the throwing barrel is required to be able to rotate at any time, and it is required that the throwing barrel can be fixed in one position when the driver does not actively adjust its angle, and will not produce angular displacement with the shaking of the whole machine.

[0003] The existing hydraulic drive system for rotating the throwing tube is as shown in the attached Figure 2 As shown, the scheme consists of seven main components, namely, a gear pump 1, a three-position four-way electromagnetic reversing valve 2, a one-way throttle valve 3, a hydraulic lock 4, a cycloidal motor 5, a relief valve 6, and a hydraulic oil tank 7. However, all hydraulic components have volumetric efficiency problems, and the closed chamber inside the cycloidal motor 5 will have a small flow of hydraulic oil leaking directly from the high-pressure side to the low-pressure side under the action of high pressure. The direct manifestation is that under the action of inertia, the throwing cylinder transmits the torque to the output shaft of the cycloidal motor 5 through gears and chains. Due to the volumetric efficiency problem of the cycloidal motor 5, the output shaft rotates at a very small angle, so that the throwing cylinder will also swing at a slight angle. The slight swing of the throwing cylinder will affect the uniform distribution of materials in the forage box, the compaction of materials, and the accuracy of throwing the forage to the following freight vehicle. Summary of the invention

[0004] The utility model provides a throwing barrel rotation driving hydraulic system and a corn cutter, which are used for improving the pointing accuracy of the throwing barrel.

[0005] In a first aspect, a hydraulic system for driving a spinning cylinder is provided, comprising: an integrated cycloidal motor, a brake and a shuttle valve,

[0006] The power output shaft of the cycloid motor is connected to the rotating shaft of the throwing cylinder;

[0007] The brake is arranged on the power output shaft of the cycloid motor;

[0008] The oil inlet of the cycloid motor is connected to the oil inlet pipeline, and the oil outlet of the cycloid motor is connected to the oil return pipeline;

[0009] The first end of the shuttle valve is in communication with the oil inlet pipeline, and the second end of the shuttle valve is in communication with the oil return pipeline;

[0010] The third end of the shuttle valve is connected to the control oil inlet of the brake through a control hydraulic pipeline;

[0011] The control oil outlet of the brake is communicated with the control oil return port of the cycloid motor through the control hydraulic pipeline.

[0012] In the above technical solution, the braking of the throwing cylinder mainly relies on the friction force of the friction plate inside the brake, which is a mechanical brake with good braking effect and high reliability. When the throwing cylinder is fixed in one position for a long time, the braking effect will not be reduced due to internal leakage generated by the hydraulic system, causing the throwing cylinder to swing slightly, thereby improving the accuracy of the pointing of the throwing cylinder. At the same time, the cycloid motor, brake and shuttle valve are integrated into an integrated structure, which is compact to assemble.

[0013] In a specific implementation scheme, a control valve is further included, wherein the control oil outlet of the control valve is connected to the oil inlet pipeline, and the return oil inlet of the control valve is connected to the return oil pipeline. By setting the control valve, the cycloid motor and the brake are controlled, thereby improving the accuracy of the directional control of the throwing cylinder.

[0014] In a specific implementation scheme, the control valve is a three-position four-way electromagnetic reversing valve. The three-position four-way electromagnetic reversing valve has a simple structure and relatively precise hydraulic control.

[0015] In a specific embodiment, it further includes a one-way throttle valve, the control oil outlet of the control valve is connected to the oil inlet pipeline through the one-way throttle valve, and the return oil inlet of the control valve is connected to the return oil pipeline through the one-way throttle valve. The one-way throttle valve is used to reduce the rotation speed of the throwing cylinder.

[0016] In a specific implementation scheme, a hydraulic pump and a hydraulic oil tank are further included, the control oil inlet of the control valve is connected to the oil outlet of the hydraulic pump through the oil inlet pipeline, and the return oil outlet of the control valve is connected to the hydraulic oil tank through the oil return pipeline. By setting up the hydraulic pump and the hydraulic oil tank, oil is supplied to the hydraulic system.

[0017] In a specific embodiment, the hydraulic pump is a gear pump, which has relatively precise hydraulic control and high accuracy.

[0018] In a specific embodiment, a relief valve is also included.

[0019] One end of the overflow valve is communicated with the oil outlet of the hydraulic pump, and the other end of the overflow valve is communicated with the oil return pipeline. The reliability of the system is improved by arranging the overflow valve.

[0020] In a specific embodiment, it also includes an oil absorption filter,

[0021] The oil inlet of the hydraulic pump is communicated with the hydraulic oil tank through the oil suction filter. By arranging the oil suction filter, the incoming oil is filtered, thereby ensuring the service life of the hydraulic system.

[0022] In a specific implementation scheme, the relief valve is a ball valve relief valve. The ball valve relief valve has a long service life and low cost.

[0023] In a second aspect, a corn harvester is also provided, comprising the hydraulic system for driving the rotation of the throwing drum as described in any one of the items.

[0024] In the above technical solution, the braking of the throwing cylinder mainly relies on the friction force of the friction plate inside the brake, which is a mechanical brake with good braking effect and high reliability. When the throwing cylinder is fixed in one position for a long time, the braking effect will not be reduced due to internal leakage generated by the hydraulic system, causing the throwing cylinder to swing slightly, thereby improving the accuracy of the pointing of the throwing cylinder. At the same time, the cycloid motor, brake and shuttle valve are integrated into an integrated structure, which is compact to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a hydraulic system for driving a throwing drum to rotate provided by an embodiment of the utility model;

[0026] Figure 2 A schematic structural diagram of an existing hydraulic drive system for rotating a throwing drum provided in an embodiment of the utility model.

[0027] In the figure, 1-gear pump, 2-three-position four-way solenoid reversing valve, 3-one-way throttle valve, 4-hydraulic lock, 5-cycloid motor, 6-overflow valve, 7-hydraulic oil tank, 8-oil suction filter, 9-brake, 10 shuttle valve. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present invention will become clearer and more specific.

[0029] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0030] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] In order to facilitate the understanding of the throwing cylinder rotation drive hydraulic system and corn machine provided by the embodiment of the utility model, its application scenario is first explained. The throwing cylinder rotation drive hydraulic system and corn machine provided by the embodiment of the utility model are used to improve the pointing accuracy of the throwing cylinder, and are applied to corn machines. Since all hydraulic components have volumetric efficiency problems, and the closed chamber inside the cycloidal motor is subjected to high pressure, a small flow of hydraulic oil will leak directly from the high-pressure side to the low-pressure side. The direct manifestation is that the throwing cylinder is under the action of inertial force, and the throwing cylinder transmits the torque to the output shaft of the cycloidal motor through gears and chains. Due to the volumetric efficiency problem of the cycloidal motor, the output shaft rotates at a very small angle, so that the throwing cylinder will also swing at a slight angle. The slight swing of the throwing cylinder will affect the uniform distribution of the material in the forage box, the compaction of the material, and the accuracy of throwing the forage to the following freight vehicle. For this reason, the embodiment of the utility model provides a throwing cylinder rotation drive hydraulic system and a corn machine to improve the pointing accuracy of the throwing cylinder. The following is a detailed description of the embodiment in conjunction with specific drawings.

[0032] refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of the hydraulic system for driving the throwing cylinder to rotate provided by the embodiment of the utility model. Figure 1 In the embodiment of the utility model, a hydraulic system for driving the rotation of a throwing cylinder is provided, comprising: a cycloidal motor 5, a brake 9 and a shuttle valve 10 which are arranged in an integrated manner.

[0033] The power output shaft of the cycloid motor 5 is connected to the rotating shaft of the throwing cylinder;

[0034] The brake 9 is arranged on the power output shaft of the cycloid motor 5;

[0035] The oil inlet of the cycloid motor 5 is connected to the oil inlet pipeline, and the oil outlet of the cycloid motor 5 is connected to the oil return pipeline;

[0036] The first end of the shuttle valve 10 is connected to the oil inlet pipeline, and the second end of the shuttle valve 10 is connected to the oil return pipeline;

[0037] The third end of the shuttle valve 10 is connected to the control oil inlet of the brake 9 through the control hydraulic pipeline;

[0038] The control oil outlet of the brake 9 is communicated with the control oil return port of the cycloid motor 5 through a control hydraulic pipeline.

[0039] In the above technical scheme, the braking of the throwing cylinder controlled by the hydraulic pipeline mainly relies on the friction force of the friction plate inside the brake 9, which is a mechanical brake with good braking effect and high reliability. When the throwing cylinder is fixed in one position for a long time, the braking effect will not be reduced due to the internal leakage of the hydraulic system, causing the throwing cylinder to swing slightly, thereby improving the accuracy of the pointing of the throwing cylinder. At the same time, the cycloid motor 5, the brake 9 and the shuttle valve 10 are integrated into an integrated structure, which is compactly assembled.

[0040] In a specific embodiment, a control valve is also included.

[0041] The control oil outlet of the control valve is connected to the oil inlet pipeline, and the return oil inlet of the control valve is connected to the return oil pipeline. By setting the control valve, the control of the cycloid motor and the brake is realized, thereby improving the accuracy of the directional control of the throwing tube.

[0042] In a specific implementation scheme, the control valve is a three-position four-way electromagnetic reversing valve 2. The three-position four-way electromagnetic reversing valve 2 has a simple structure and relatively precise hydraulic control.

[0043] In a specific embodiment, a one-way throttle valve 3 is further included, and the control oil outlet of the control valve is connected to the oil inlet pipeline through a one-way throttle valve 3, and the return oil inlet of the control valve is connected to the return oil pipeline through a one-way throttle valve 3. The one-way throttle valve 3 is used to reduce the rotation speed of the throwing cylinder.

[0044] In a specific embodiment, a hydraulic pump and a hydraulic oil tank 7 are further included, the control oil inlet of the control valve is connected to the oil outlet of the hydraulic pump through an oil inlet pipeline, and the return oil outlet of the control valve is connected to the hydraulic oil tank 7 through an oil return pipeline. By setting up the hydraulic pump and the hydraulic oil tank 7, oil is supplied to the hydraulic system.

[0045] In a specific embodiment, the hydraulic pump is a gear pump 1. The hydraulic control of the gear pump 1 is relatively precise and has high accuracy.

[0046] In a specific implementation scheme, it also includes a relief valve 6,

[0047] One end of the overflow valve 6 is communicated with the oil outlet of the hydraulic pump, and the other end of the overflow valve 6 is communicated with the oil return pipeline. By providing the overflow valve 6, the reliability of the system is improved.

[0048] In a specific embodiment, an oil suction filter 8 is also included.

[0049] The oil inlet of the hydraulic pump is communicated with the hydraulic oil tank 7 through the oil suction filter 8. By arranging the oil suction filter 8, the incoming oil is filtered to ensure the service life of the hydraulic system.

[0050] In a specific embodiment, the relief valve 6 is a ball valve relief valve. The ball valve relief valve has a long service life and low cost.

[0051] In a specific embodiment, the embodiment includes a gear pump 1, a three-position four-way electromagnetic reversing valve 2, a one-way throttle valve 3, a cycloidal motor 5, a relief valve 6, a hydraulic oil tank 7, an oil suction filter 8, a brake 9 and a shuttle valve 10; wherein the cycloidal motor 5, the brake 9 and the shuttle valve 10 form an integrated structure. Figure 1 , its working principle is:

[0052] 1. When the driver does not need to actively adjust the angle of the throwing cylinder, there is no control signal for the electromagnetic coils on the left and right sides of the three-position four-way electromagnetic reversing valve 2, and the valve core function works in the middle position. At this time, the oil ports on both sides of the cycloidal motor 5 are connected to the hydraulic oil tank 7 through the one-way valve path of the left and right three one-way throttle valves, through the middle oil circuit of the three-position four-way electromagnetic reversing valve 2, and through the pipeline. At this time, the pressure on both sides of the shuttle valve 10 is the return oil pressure, and the return oil pressure is low, and it is impossible to enter the brake 9 through the control oil circuit to open the brake 9. At this time, the spring plate inside the brake 9 presses the friction plate, and the rotational inertia torque of the throwing cylinder due to the bumping of the whole machine is transmitted to the output shaft of the brake 9 through the gear and chain. The brake 9 relies on the internally pressed friction plate to offset the torque, ensuring that the throwing cylinder is fixed in a certain position without slight angle shaking.

[0053] 2. When the driver needs to actively adjust the angle of the throwing cylinder, the electromagnetic coil on the left side of the three-position four-way electromagnetic reversing valve 2 receives an electrical signal, the three-position four-way electromagnetic reversing valve 2 works in the left position, and the gear pump 1 outputs oil. After entering through the P port of the three-position four-way electromagnetic reversing valve 2, it flows out from the left oil port and enters the left one-way throttle valve 3. After flowing out through the throttling oil port of the left one-way throttle valve 3, it enters the upper oil port of the cycloid motor 5 through the pipeline. At this time, the friction plate of the brake 9 is still kept in a compressed state under the action of the internal spring, playing a braking role. As the pressure oil enters the upper oil port of the cycloid motor 5, the pressure in the pipeline gradually increases. At this time, the high-pressure oil enters through the oil port on the left side of the shuttle valve 10 and enters the control oil port of the brake 9. At this time, the pressure oil generates thrust to offset the spring force inside the brake 9, so that the friction plate remains in a separated state. At this time, the cycloid motor 5 drives the output shaft through the gear and chain to drive the throwing cylinder to rotate.

[0054] 3. When the driver wants the throwing cylinder to stop rotating after it has rotated to a predetermined position, he only needs to cut off the control signals on both sides of the three-position four-way electromagnetic reversing valve 2. At this time, there is no pressure oil drive at the oil ports on both sides of the cycloid motor 5, and no high-pressure oil enters the control oil circuit of the brake 9 through the shuttle valve 10. The pressure in the control chamber of the brake 9 is reduced, and the internal spring of the brake 9 presses the friction plate, so that the throwing cylinder stops at a determined position.

[0055] The embodiment of the utility model also provides a corn machine, comprising any one of the throwing drum rotation driving hydraulic systems.

[0056] In the above technical scheme, the braking of the throwing cylinder controlled by the hydraulic pipeline mainly relies on the friction force of the friction plate inside the brake 9, which is a mechanical brake with good braking effect and high reliability. When the throwing cylinder is fixed in one position for a long time, the braking effect will not be reduced due to the internal leakage of the hydraulic system, causing the throwing cylinder to swing slightly, thereby improving the accuracy of the pointing of the throwing cylinder. At the same time, the cycloid motor 5, the brake 9 and the shuttle valve 10 are integrated into an integrated structure, which is compactly assembled.

[0057] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships in the working state of the present invention, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] The present invention has been described above in conjunction with preferred embodiments, but these embodiments are only exemplary and serve only as an illustration. On this basis, the present invention may be subjected to a variety of substitutions and improvements, all of which fall within the scope of protection of the present invention.

Claims

1. A hydraulic system for driving a throwing drum to rotate, characterized in that: include: The cycloid motor (5), the brake (9) and the shuttle valve (10) are arranged in an integrated manner. The power output shaft of the cycloid motor (5) is connected to the rotating shaft of the throwing cylinder; The brake (9) is arranged on the power output shaft of the cycloid motor (5); The oil inlet of the cycloid motor (5) is connected to the oil inlet pipeline, and the oil outlet of the cycloid motor (5) is connected to the oil return pipeline; The first end of the shuttle valve (10) is in communication with the oil inlet pipeline, and the second end of the shuttle valve (10) is in communication with the oil return pipeline; The third end of the shuttle valve (10) is connected to the control oil inlet of the brake (9) through a control hydraulic pipeline; The control oil outlet of the brake (9) is connected to the control oil return port of the cycloid motor (5) through the control hydraulic pipeline.

2. The hydraulic system for driving the throwing drum to rotate according to claim 1, characterized in that: Also includes control valves, The control oil outlet of the control valve is communicated with the oil inlet pipeline, and the return oil inlet of the control valve is communicated with the oil return pipeline.

3. The hydraulic system for driving the throwing drum to rotate according to claim 2, characterized in that: The control valve is a three-position four-way electromagnetic reversing valve (2).

4. The hydraulic system for driving the throwing drum to rotate according to claim 3 is characterized in that: It also includes a one-way throttle valve (3), The control oil outlet of the control valve is communicated with the oil inlet pipeline via a one-way throttle valve (3), and the return oil inlet of the control valve is communicated with the return oil pipeline via a one-way throttle valve (3).

5. The hydraulic system for driving the throwing drum to rotate according to claim 4, characterized in that: It also includes a hydraulic pump and a hydraulic oil tank (7), The control oil inlet of the control valve is communicated with the oil outlet of the hydraulic pump via the oil inlet pipeline, and the return oil outlet of the control valve is communicated with the hydraulic oil tank (7) via the oil return pipeline.

6. The hydraulic system for driving the throwing drum to rotate according to claim 5, characterized in that: The hydraulic pump is a gear pump (1).

7. The hydraulic system for driving the throwing drum to rotate according to claim 6, characterized in that: It also includes a relief valve (6), One end of the overflow valve (6) is in communication with the oil outlet of the hydraulic pump, and the other end of the overflow valve (6) is in communication with the oil return pipeline.

8. The hydraulic system for driving the throwing drum to rotate according to claim 7, characterized in that: It also includes an oil suction filter (8), The oil inlet of the hydraulic pump is connected to the hydraulic oil tank (7) through the oil suction filter (8).

9. The hydraulic system for driving the throwing drum to rotate according to claim 8, characterized in that: The overflow valve (6) is a ball valve type overflow valve.

10. A corn machine, characterized in that: It comprises a hydraulic system for driving the throwing drum to rotate as described in any one of claims 1 to 9.

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