A medicinal material harvesting machine using a hydraulic drive system

Abstract

A medicinal material harvester with a hydraulic drive system comprises a first hydraulic system, a second hydraulic system and a third hydraulic system. The plunger pump of the first hydraulic system drives a walking control module. The second hydraulic system drives an operation expansion module. The third hydraulic system drives a hydraulic expansion unit. Through the division of labor and cooperation of the three independent hydraulic systems, the first hydraulic system drives the walking control unit to perform the forward / reverse walking, small-radius turning and differential turning actions of the harvester. The second hydraulic system drives the operation expansion unit to perform the primary chain, secondary chain, front shovel driving and rotating actions, and supports variable speed adjustment. The third hydraulic system adopts electro-hydraulic integrated control to perform fixed operation actions such as the lifting of the cutting table and the tipping of the medicine bin. The harvester realizes precise independent control of walking, operation expansion and fixed actions, and the adjustable speed adapts to different operation conditions, effectively improving the flexibility, adaptability and operation efficiency of medicinal material harvesting operations.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic drive technology for medicinal herb harvesting equipment, and specifically relates to a medicinal herb harvester using a hydraulic drive system. Background Technology

[0002] In existing medicinal herb harvesters, a single hydraulic system typically drives the harvester's walking assembly. For example, CN221718633U discloses a hydraulic dual-pump, dual-motor synchronous walking and steering control device, including a hydraulic pump assembly and a drive assembly. The hydraulic pump assembly comprises a first hydraulic pump body and a second hydraulic pump body. The drive assembly includes a left walking assembly and a right walking assembly. The left walking assembly houses a left walking piston motor, and the right walking assembly houses a right walking piston motor. The first hydraulic pump body is connected to the left walking piston motor via a first hydraulic oil pipe assembly, and the second hydraulic pump body is connected to the right walking piston motor via a second hydraulic oil pipe assembly. A hydraulic control valve is installed between the hydraulic pump assembly and the steering wheel assembly, and a throttle valve is installed between the hydraulic control valve and the hydraulic pump assembly to control the hydraulic fluid complementarity between the first and second hydraulic pump bodies. During straight-line movement, the hydraulic fluid complementarity between the first and second hydraulic pump bodies is achieved through the hydraulic control valve and the throttle valve, preventing hydraulic inconsistencies that could cause deviation during walking and ensuring stability during straight-line movement.

[0003] However, with the continuous development of agricultural mechanization, the extended functions of harvesters are becoming more and more numerous and complete. These extended functions also require a drive system to drive them. The original hydraulic drive system is gradually unable to meet the various problems that need to be solved in actual agricultural production. Therefore, it is necessary to develop a new hydraulic drive system for harvesters to achieve the integration and optimization of various functional mechanisms of harvesters. Summary of the Invention

[0004] This invention utilizes the division of labor and cooperation of three independent hydraulic systems. The first hydraulic system drives the travel control unit, executing the harvester's forward / reverse travel, small-radius turning, and differential turning actions. The second hydraulic system drives the work extension unit, executing the primary chain, secondary chain, front shovel drive, and rotation actions, and supports variable speed adjustment. The third hydraulic system adopts electro-hydraulic integrated control, executing fixed operation actions such as header lifting and herb bin tipping. This achieves precise and independent control of the herb harvester's travel, work extension, and fixed actions, with adjustable speed to adapt to different working conditions, effectively improving the flexibility, adaptability, and efficiency of herb harvesting operations.

[0005] The technical problem solved by this invention can be achieved by the following technical solution: a medicinal herb harvester using a hydraulic drive system, comprising a first hydraulic system, a second hydraulic system, a third hydraulic system, an engine, and a transmission mechanism. The engine drives the third hydraulic system and a plunger pump, and the plunger pump drives the first hydraulic system and the second hydraulic system. The second hydraulic system includes a main pipeline and several branch pipelines, which are connected by a synchronous flow divider motor. At least one extension drive unit is provided on each branch pipeline, and the extension drive unit is used to drive the transmission mechanism. The third hydraulic system includes a second pump body and a hydraulic extension unit, which is used to dock with the working drive unit.

[0006] The transmission mechanism includes a conveyor chain assembly and a blade assembly.

[0007] The conveyor chain assembly includes a first conveyor chain and a second conveyor chain, and the extension drive unit corresponding to the first conveyor chain and the extension drive unit corresponding to the second conveyor chain are located on the same branch pipeline.

[0008] An unloading valve is installed on the main pipeline.

[0009] The first hydraulic system includes a right travel assembly and a left travel assembly. The right travel assembly includes a right hydraulic pump, a right piston motor, and a right hydraulic hose assembly for connecting the right hydraulic pump and the right piston motor. The left travel assembly includes a left hydraulic pump, a left piston motor, and a left hydraulic hose assembly for connecting the left hydraulic pump and the left piston motor.

[0010] The right hydraulic hose assembly includes right hydraulic hose A and right hydraulic hose B. Right hydraulic hose A is used to connect to the pump port A of the right hydraulic pump and the oil port A of the right piston motor. Right hydraulic hose B is used to connect to the pump port B of the right hydraulic pump and the oil port B of the right piston motor. The left hydraulic hose assembly includes left hydraulic hose A and left hydraulic hose B. Left hydraulic hose A is used to connect to the pump port A of the left hydraulic pump and the oil port A of the left piston motor. Left hydraulic hose B is used to connect to the pump port B of the left hydraulic pump and the oil port B of the left piston motor.

[0011] The right-hand drive assembly also includes a right-hand shift mechanism, and the left-hand drive assembly also includes a left-hand shift mechanism. The oil port P of the right-hand shift mechanism and the oil port P of the left-hand shift mechanism are connected by an oil pipe P.

[0012] The second pump body adopts a gear pump, and the hydraulic expansion unit includes a multi-solenoid valve, which is used to connect to the operation drive unit.

[0013] The operation drive unit can be any one or more of the following: cutting table lifting operation unit, pressure roller lifting operation unit, cutting table folding operation unit, medicine bin lifting operation unit, and reserved output operation unit.

[0014] The multi-port solenoid valve uses a five-port solenoid valve.

[0015] Compared with the prior art, the present invention has the following beneficial effects: Through the division of labor and cooperation of three independent hydraulic systems, the first hydraulic system drives the walking control unit to perform forward / reverse walking, small-radius turning and differential turning actions of the harvester; the second hydraulic system drives the work extension unit to perform the first-level chain, second-level chain, front shovel drive and rotation actions, and supports variable speed adjustment; the third hydraulic system adopts electro-hydraulic integrated control to perform fixed operation actions such as header lifting and medicine bin tipping, realizing precise independent control of the walking, work extension and fixed actions of the medicinal herb harvester, and the speed can be adjusted to adapt to different working conditions, effectively improving the flexibility, adaptability and work efficiency of medicinal herb harvesting operations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the first hydraulic system;

[0018] Figure 3 This is a schematic diagram of the second hydraulic system;

[0019] Figure 4 This is a schematic diagram of the third hydraulic system;

[0020] Figure 5 This is a schematic diagram of the hydraulic expansion unit;

[0021] Figure 6 This is a schematic diagram of the harvester's structure;

[0022] Figure 7 It is a cross-sectional view of a harvester;

[0023] Figure 8 This is a flowchart of the third hydraulic system.

[0024] In the diagram: 1-First hydraulic system, 11-Right travel assembly, 111-Right hydraulic pump, 112-Right piston motor, 113-Right hydraulic hose assembly, 114-Right gear shifting mechanism, 12-Left travel assembly, 121-Left hydraulic pump, 122-Left piston motor, 123-Left hydraulic hose assembly, 124-Left gear shifting mechanism, 2-Second hydraulic system, 20-Extension drive unit, 21-Main pipeline, 211-Unloading valve, 22-Branch pipeline, 23-Synchronous flow divider motor, 3-Third hydraulic system, 31-Second pump body, 32-Hydraulic extension unit, 321-First valve body, 322-Second valve body, 323-Third valve body, 33-Working drive unit, 4-Conveyor chain assembly, 41-First conveyor chain, 42-Second conveyor chain, 5-Shovel assembly, 6-Engine, 61-Piston pump. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0026] In the description of this invention, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0027] Combined with appendix Figures 1 to 8 As shown, this embodiment discloses a medicinal herb harvester using a hydraulic drive system, including a first hydraulic system 1, a second hydraulic system 2, a third hydraulic system 3, an engine 6, and a transmission mechanism. The engine 6 drives the third hydraulic system 3 and a plunger pump 61, and the plunger pump 61 drives the first hydraulic system 1 and the second hydraulic system 2. The second hydraulic system 2 includes a main pipeline 21 and several branch pipelines 22. The main pipeline 21 and the branch pipelines 22 are connected by a synchronous flow divider motor 23. At least one extension drive unit 20 is provided on each branch pipeline 22, and the extension drive unit 20 is used to drive the transmission mechanism. The third hydraulic system 3 includes a second pump body 31 and a hydraulic extension unit 32, and the hydraulic extension unit 32 is used to connect to the operation drive unit 33. Preferably, in this embodiment, the second hydraulic system 2 has two branch pipelines 22, and the synchronous flow divider motor 23 is provided with two cycloidal motors, with each cycloidal motor driving a single branch pipeline 22.

[0028] In combination with the above, the structure of the plunger pump 61 and the cycloidal motor allows for variable speed operation according to different crops and operating conditions, thereby improving the separation effect.

[0029] In combination with the above, the transmission mechanism includes a conveyor chain assembly 4 and a blade assembly 5. In this embodiment, the conveyor chain assembly 4 includes a first conveyor chain 41 and a second conveyor chain 42. Preferably, the extension drive unit 20 corresponding to the first conveyor chain 41 and the extension drive unit 20 corresponding to the second conveyor chain 42 are located on the same branch pipe 22.

[0030] Combining the above installation structure with the attached Figure 5 and attached Figure 6As shown, the first conveyor chain 41 and the second conveyor chain 42 are arranged at an upward and backward angle, and are staggered. Preferably, in this embodiment, the rear part of the first conveyor chain 41 is located above the front part of the second conveyor chain 42, so that the soil and medicinal materials passing through the first conveyor chain 41 will fall freely onto the second conveyor chain 42, making it easier for the soil to separate from the medicinal materials. The upward and backward angle arrangement of the first conveyor chain 41 and the second conveyor chain 42 prolongs the time required for the soil and medicinal materials to pass through, thus improving the separation effect.

[0031] In light of the above, an unloading valve 211 is installed on the main pipeline 21.

[0032] In conjunction with the above, the first hydraulic system 1 is used to control the walking control module of the harvester. The first hydraulic system 1 includes a right walking assembly 11 and a left walking assembly 12. The right walking assembly 11 includes a right hydraulic pump 111, a right piston motor 112, and a right hydraulic oil pipe assembly 113 for connecting the right hydraulic pump 111 and the right piston motor 112. The left walking assembly 12 includes a left hydraulic pump 121, a left piston motor 122, and a left hydraulic oil pipe assembly 123 for connecting the left hydraulic pump 121 and the left piston motor 122.

[0033] In summary, the right hydraulic pipe assembly 113 includes a right hydraulic pipe A and a right hydraulic pipe B. The right hydraulic pipe A is used to connect to the pump port A of the right hydraulic pump 111 and the oil port A of the right piston motor 112, and the right hydraulic pipe B is used to connect to the pump port B of the right hydraulic pump 111 and the oil port B of the right piston motor 112. The left hydraulic pipe assembly 123 includes a left hydraulic pipe A and a left hydraulic pipe B. The left hydraulic pipe A is used to connect to the pump port A of the left hydraulic pump 121 and the oil port A of the left piston motor 122, and the left hydraulic pipe B is used to connect to the pump port B of the left hydraulic pump 121 and the oil port B of the left piston motor 122.

[0034] Combined with the above installation structure, the harvester can perform forward and reverse travel, small-radius turning and differential turning through the right hydraulic oil pipe assembly 113 and the left hydraulic oil pipe assembly 123, thereby improving driving force and flexibility.

[0035] In conjunction with the above, the right travel assembly 11 also includes a right shift mechanism 114, and the left travel assembly 12 also includes a left shift mechanism 124. The oil port P of the right shift mechanism 114 and the oil port P of the left shift mechanism 124 are connected by an oil pipe P to achieve switching control between high speed and low speed of the harvester.

[0036] In conjunction with the above, the hydraulic expansion unit 32 includes a multi-solenoid valve, which is used to connect to the operation drive unit 33. The multi-solenoid valve is preferably a five-solenoid valve. The five-solenoid valve typically includes a single-solenoid valve unit, a double-solenoid valve unit, a triple-solenoid valve unit, a quadruple-solenoid valve unit, and a five-solenoid valve unit. The internal structures of the single-solenoid valve unit, the double-solenoid valve unit, the triple-solenoid valve unit, the quadruple-solenoid valve unit, and the five-solenoid valve unit are the same. Taking the single-solenoid valve unit as an example, the specific structure is as follows: the single-solenoid valve unit includes a first valve body 321, a second valve body 322, and a third valve body 323. The first valve body 321 is connected to the interface A of the operation drive unit 33 through interface d1. The second valve body 322 is connected to the interface B of the operation drive unit 33 through interface d2. One end of the third valve body 323 is connected to the first valve body 321 through interface b, and the other end is connected to the second valve body 322 through interface a.

[0037] In combination with the above, the operation drive unit 33 can be any one or more of the following: cutting table lifting operation unit, pressure roller lifting operation unit, cutting table folding operation unit, medicine bin lifting operation unit, and reserved output operation unit.

[0038] In this embodiment, based on the above, a single solenoid valve unit is connected to the cutting platform lifting unit to control the lifting and lowering of the cutting platform; a double solenoid valve unit is connected to the pressure roller lifting unit to control the lifting and lowering of the pressure roller; a triple solenoid valve unit is connected to the cutting platform folding unit to control the folding and unfolding of the cutting platform; a quadruple solenoid valve unit is connected to the medicine bin lifting unit to control the lifting and lowering of the medicine bin; and a quintuple solenoid valve unit is connected to the reserved output unit to control the vehicle body's attitude balance.

[0039] In conjunction with the above installation structure, specifically in this embodiment, the reserved output work unit also has a lifting platform function. This reserved hydraulic output interface of the reserved output work unit is mainly used for vehicle body posture balance control. During operation, if the vehicle front lifts significantly, an external hydraulic auxiliary support device can be used to correct the vehicle body to a level state in real time, ensuring accurate and stable cutting platform working depth; combined with the attached... Figure 5 As shown, interface A is a rod-cavity oil cylinder, and interface B is a rodless cavity oil cylinder. When interfaces a, b, d1, and d2 are all de-energized, interfaces A and B both have a pressure-holding effect. When interfaces b and d1 are energized, and interfaces a and d2 are de-energized, the cutting table rises. When interfaces a and d2 are energized, and interfaces b and d1 are de-energized, the cutting table descends, and at this time it has a strong pressure function. When interfaces d1 and d2 are energized, and interfaces a and b are de-energized, the cutting table descends, at this time there is no strong pressure function, and the cutting table descends to the ground in a floating state.

[0040] Based on the above installation structure, the pressure roller lifting unit, the cutting table folding unit, the medicine bin lifting unit, and the reserved output unit all operate on the same principle as the cutting table lifting unit.

[0041] Based on the above, the second pump body 31 is preferably a gear pump.

[0042] This invention utilizes the division of labor and cooperation of three independent hydraulic systems. The first hydraulic system drives the travel control unit, executing the harvester's forward / reverse travel, small-radius turning, and differential turning actions. The second hydraulic system drives the work extension unit, executing the primary chain, secondary chain, front shovel drive, and rotation actions, and supports variable speed adjustment. The third hydraulic system adopts electro-hydraulic integrated control, executing fixed operation actions such as header lifting and herb bin tipping. This achieves precise and independent control of the herb harvester's travel, work extension, and fixed actions, with adjustable speed to adapt to different working conditions, effectively improving the flexibility, adaptability, and efficiency of herb harvesting operations.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A medicinal herb harvester employing a hydraulic drive system, comprising a first hydraulic system (1), a second hydraulic system (2), a third hydraulic system (3), an engine (6), and a transmission mechanism, characterized in that: The engine (6) drives the third hydraulic system (3) and the plunger pump (61) respectively. The plunger pump (61) drives the first hydraulic system (1) and the second hydraulic system (2) respectively. The second hydraulic system (2) includes a main pipeline (21) and several branch pipelines (22). The main pipeline (21) and the branch pipelines (22) are connected by a synchronous flow divider motor (23). At least one extension drive unit (20) is provided on the branch pipeline (22). The extension drive unit (20) is used to drive the transmission mechanism. The third hydraulic system (3) includes a second pump body (31) and a hydraulic extension unit (32). The hydraulic extension unit (32) is used to connect to the working drive unit (33). The hydraulic extension unit (32) includes a multi-solenoid valve. The multi-solenoid valve is used to connect to the working drive unit (33). The multi-solenoid valve includes multiple solenoid valve units. The solenoid valve unit includes a first valve body (321), a second valve body (322), and a third valve body (323). The first valve body (321) is connected to interface A of the work drive unit (33) via interface d1. The second valve body (322) is connected to interface B of the work drive unit (33) via interface d2. One end of the third valve body (323) is connected to the first valve body (321) via interface b, and the other end is connected to the second valve body (322) via interface a. The work drive unit (33) includes a reserved output work unit, which has a cutting table floating function. Interface A of the reserved output work unit is... The hydraulic cylinder has a rod-shaped cavity, while port B is a rodless cavity hydraulic cylinder. When ports a, b, d1, and d2 are not energized, ports A and B maintain pressure. When ports b and d1 are energized, and ports a and d2 are not energized, the cutting table rises. When ports a and d2 are energized, and ports b and d1 are not energized, the cutting table descends, providing a strong pressure function. When ports d1 and d2 are energized, and ports a and b are not energized, there is no strong pressure function, and the cutting table descends to the ground in a floating state.

2. A medicinal herb harvester using a hydraulic drive system according to claim 1, characterized in that: The transmission mechanism includes a conveyor chain assembly (4) and a blade assembly (5).

3. A medicinal herb harvester employing a hydraulic drive system according to claim 2, characterized in that: The conveyor chain assembly (4) includes a first conveyor chain (41) and a second conveyor chain (42), and the extension drive unit (20) corresponding to the first conveyor chain (41) and the extension drive unit (20) corresponding to the second conveyor chain (42) are located on the same branch pipeline (22).

4. A medicinal herb harvester employing a hydraulic drive system according to any one of claims 1 to 3, characterized in that: An unloading valve (211) is installed on the main pipeline (21).

5. A medicinal herb harvester using a hydraulic drive system according to claim 1, characterized in that: The first hydraulic system (1) includes a right travel assembly (11) and a left travel assembly (12). The right travel assembly (11) includes a right hydraulic pump (111), a right piston motor (112), and a right hydraulic hose assembly (113) for connecting the right hydraulic pump (111) and the right piston motor (112). The left travel assembly (12) includes a left hydraulic pump (121), a left piston motor (122), and a left hydraulic hose assembly (123) for connecting the left hydraulic pump (121) and the left piston motor (122).

6. A medicinal herb harvester employing a hydraulic drive system according to claim 5, characterized in that: The right hydraulic pipe assembly (113) includes a right hydraulic pipe A and a right hydraulic pipe B. The right hydraulic pipe A is used to connect to the pump port A of the right hydraulic pump (111) and the oil port A of the right piston motor (112). The right hydraulic pipe B is used to connect to the pump port B of the right hydraulic pump (111) and the oil port B of the right piston motor (112). The left hydraulic pipe assembly (123) includes a left hydraulic pipe A and a left hydraulic pipe B. The left hydraulic pipe A is used to connect to the pump port A of the left hydraulic pump (121) and the oil port A of the left piston motor (122). The left hydraulic pipe B is used to connect to the pump port B of the left hydraulic pump (121) and the oil port B of the left piston motor (122).

7. A medicinal herb harvester employing a hydraulic drive system according to claim 5, characterized in that: The right-hand drive assembly (11) further includes a right-hand shift mechanism (114), and the left-hand drive assembly (12) further includes a left-hand shift mechanism (124). The oil port P of the right-hand shift mechanism (114) and the oil port P of the left-hand shift mechanism (124) are connected by an oil pipe P.

8. A medicinal herb harvester employing a hydraulic drive system according to claim 1, characterized in that: The second pump body (31) is a gear pump.

9. A medicinal herb harvester employing a hydraulic drive system according to claim 8, characterized in that: The operation drive unit (33) can be any one or more of the following: cutting table lifting operation unit, pressure roller lifting operation unit, cutting table folding operation unit, and medicine bin lifting operation unit.

10. A medicinal herb harvester employing a hydraulic drive system according to claim 9, characterized in that: The multi-port solenoid valve uses a five-port solenoid valve.

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