Hydraulic drive device for corn ear lifting fan

Abstract

The utility model relates to a kind of corn ear hoisting fan hydraulic drive device, including hoisting fan gear pump, cooler, hoisting fan hydraulic unloading valve, hoisting fan relief valve, speed regulating valve, BM series front cycloidal motor, safety valve, BM series rear cycloidal motor, control control multiway valve, main clutch oil cylinder, engine plug pump and hydraulic oil tank;The utility model has the advantages that: the front and rear two (or more) suction fan drive cycloidal motor of hoisting device uses series structure, so that fan speed is more stable, structure is simpler, and cost is more advantageous;Hoisting suction fan transmission is stable, and overload impact is small, and failure rate is low.

Description

Technical Field

[0001] This utility model relates to the field of agricultural harvesting machinery technology, specifically to a hydraulic drive device for a corn ear lifting fan. Background Technology

[0002] Corn harvesting machinery uses a header to separate the ears of corn from the plant and transport them to an ear conveyor. A chain rake elevator then pushes the ears to a husk-removing mechanism, where the husks are removed and the ears are thrown into the grain bin, completing the harvesting process. Conventional chain rake elevators use mechanical drives for their suction fans, transmitting power from the elevator's main shaft to the suction fan's drive shaft via a belt or chain. The suction fan is mounted on the output shaft of the suction fan's drive shaft. Due to the complexity of the mechanical transmission structure, the long transmission route, and the difficulty of adjustment, the mechanical structure has a high failure rate, and adjustments and maintenance are time-consuming and labor-intensive. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the above-mentioned traditional technology and provide a...

[0004] The purpose of this utility model is achieved through the following technical measures: a hydraulic drive device for a corn ear lifting fan, characterized in that it includes: a lifting fan gear pump, a cooler, a lifting fan hydraulic unloading valve, a lifting fan overflow valve, a speed regulating valve, a BM series front cycloidal motor, a safety valve, a BM series rear cycloidal motor, a control multi-way valve, a main clutch cylinder, an engine pump, and a hydraulic oil tank.

[0005] The lifting fan gear pump is connected to the engine power output pulley via belt drive;

[0006] The BM series front cycloidal motor is equipped with a front oil inlet and a front oil outlet, and the BM series rear cycloidal motor is equipped with a rear oil inlet and a rear oil outlet.

[0007] The front oil outlet of the BM series front cycloidal motor is connected to the rear oil inlet of the BM series rear cycloidal motor to form a hydraulic series circuit.

[0008] The hydraulic unloading valve of the lifting fan is a normally open solenoid valve, with its inlet connected to the outlet of the gear pump of the lifting fan and its return port connected to the hydraulic oil tank.

[0009] The main clutch oil circuit output terminal of the operating control multi-way valve is connected to the main clutch oil cylinder, and the coil of the operating control multi-way valve is electrically linked to the coil of the lifting fan hydraulic unloading valve.

[0010] As a preferred embodiment: in the hydraulic series circuit, the inlet of the BM series front cycloidal motor is connected to the outlet of the lifting fan overflow valve, and the outlet of the BM series front cycloidal motor is connected to the hydraulic oil tank through a safety valve.

[0011] As a preferred embodiment: when the lifting fan hydraulic unloading valve is not energized, the hydraulic oil of the lifting fan gear pump returns directly to the hydraulic oil tank; when energized, the hydraulic oil establishes system pressure P1 through the lifting fan overflow valve and drives the BM series front cycloidal motor.

[0012] As a preferred embodiment, the cooler is connected in series in the return oil line of the lifting fan gear pump to reduce the temperature of the hydraulic oil.

[0013] As a preferred embodiment, the speed control valve is located on the oil outlet pipe of the BM series cycloidal motor and is used to adjust the flow rate of the series circuit to control the fan speed.

[0014] As a preferred solution: when the coil b of the multi-way control valve is energized, the main clutch cylinder is engaged with oil, and at the same time the hydraulic unloading valve of the lifting fan is energized, so that the BM series front cycloidal motor and the BM series rear cycloidal motor start synchronously.

[0015] As a preferred embodiment: the oil inlet of the safety valve is connected to the front oil outlet of the BM series front cycloidal motor, and the local pressure between the front oil outlet and the rear oil inlet is P2. When the local pressure P2 exceeds the set value, the overflow protection is activated.

[0016] Due to the adoption of the above technical solution, the advantages of this utility model compared with the prior art are:

[0017] 1. The front and rear (or more) suction fans of the elevator are driven by cycloidal motors in series, which makes the fan speed more stable, the structure simpler, and the cost more advantageous;

[0018] 2. The lifting and suction fan has a smooth transmission, low overload impact, and low failure rate.

[0019] This device utilizes the engine's power output pulley to drive an independent lifting fan gear pump. The gear pump drives a cycloidal motor, which is connected to the input main drive shaft of the lifting device's suction fan transmission box, achieving smooth transmission of hydraulic power. For the two suction fans positioned before and after the lifting device's secondary pulling mechanism, both are driven by cycloidal motors. Considering the rationality of the hydraulic system structure, the oil outlet of the front fan's cycloidal motor and the oil inlet of the rear fan's cycloidal motor are connected, forming a series hydraulic motor structure.

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Appendix Figure 1 This is a schematic diagram of the hydraulic principle of a hydraulic drive device for lifting corn ears according to this utility model. Detailed Implementation

[0022] Example: As attached Figure 1 As shown, a hydraulic drive device for a corn ear lifting fan includes: a lifting fan gear pump 1, a cooler 2, a lifting fan hydraulic unloading valve 3, a lifting fan overflow valve 4, a speed regulating valve 5, a BM series front cycloidal motor 6, a safety valve 7, a BM series rear cycloidal motor 8, a control multi-way valve 9, a main clutch cylinder 10, an engine pump 11, and a hydraulic oil tank 12.

[0023] The lifting fan gear pump 1 is connected to the engine power output pulley via belt drive;

[0024] The BM series front cycloidal motor 6 is provided with a front oil port 6A and a front oil port 6B, and the BM series rear cycloidal motor 8 is provided with a rear oil port 8A and a rear oil port 8B.

[0025] The front oil outlet 6B of the BM series front cycloidal motor 6 is connected to the rear oil inlet 8A of the BM series rear cycloidal motor 8 to form a hydraulic series circuit.

[0026] The hydraulic unloading valve 3 of the lifting fan is a normally open solenoid valve. Its oil inlet is connected to the oil outlet of the gear pump 1 of the lifting fan, and its oil return port is connected to the hydraulic oil tank 12.

[0027] The main clutch oil circuit output end of the operating control multi-way valve 9 is connected to the main clutch oil cylinder 10, and the coil b1 of the operating control multi-way valve 9 is electrically linked with the coil of the lifting fan hydraulic unloading valve 3.

[0028] In the hydraulic series circuit, the forward oil port (6A) of the BM series front cycloidal motor 6 is connected to the oil outlet of the lifting fan overflow valve 4, and the forward oil outlet 6B of the BM series front cycloidal motor 6 is connected to the hydraulic oil tank 12 through the safety valve 7.

[0029] When the hydraulic unloading valve 3 of the lifting fan is not energized, the hydraulic oil of the gear pump 1 of the lifting fan returns directly to the hydraulic oil tank 12; when energized, the hydraulic oil establishes the system pressure P1 through the relief valve 4 of the lifting fan and drives the BM series front cycloidal motor 6.

[0030] The cooler 2 is connected in series in the return oil line of the lifting fan gear pump 1 to reduce the temperature of the hydraulic oil.

[0031] The speed control valve 5 is located on the oil outlet pipe of the BM series cycloidal motor 8 and is used to adjust the flow rate of the series circuit to control the fan speed.

[0032] When the coil b1 of the control multi-way valve 9 is energized, the main clutch cylinder 10 is engaged with the main clutch, and at the same time the hydraulic unloading valve 3 of the lifting fan is energized, causing the BM series front cycloidal motor 6 and the BM series rear cycloidal motor 8 to start synchronously.

[0033] The inlet of the safety valve 7 is connected to the front outlet 6B of the BM series cycloidal motor 6. The local pressure between the front outlet 6B and the rear inlet 8A is P2. When the local pressure P2 exceeds the set value, the overflow protection is activated.

[0034] The hydraulic power source is the gear pump 1 of the lifting fan, which is a gear pump inserted into the traveling pump. The operation of the lifting fan is achieved by the BM series front cycloidal motor 6 and the BM series rear cycloidal motor 8.

[0035] The hydraulic unloading valve 3 of the lifting fan is a normally open solenoid valve. Before the coil is energized, the circulating hydraulic oil of the lifting fan gear pump 1 returns to the oil tank through the hydraulic unloading valve 3, and the system pressure of the lifting fan relief valve 4 is the return oil pressure. When the hydraulic unloading valve 3 is energized, it closes, and the circulating hydraulic oil of the lifting fan gear pump 1 establishes system pressure P1 through the lifting fan relief valve 4, providing power to the lifting fan hydraulic system. The maximum pressure of the inlet port 6A of the BM series front cycloidal motor 6 is the pressure set by the lifting fan relief valve 4, and the maximum pressure of the outlet port 6B is the pressure set by the safety valve 7.

[0036] The front outlet 6B of the BM series front cycloidal motor 6 and the rear inlet 8A of the BM series rear cycloidal motor 8 are connected to form a hydraulic series circuit between the two motors. The speed of the blower in the series circuit is controlled by adjusting the flow rate of the speed control valve 5. Because the hydraulic system generates a lot of heat and the hydraulic oil temperature is high during operation, a cooler 2 needs to be connected in series on the pipeline to remove most of the heat. Synchronization of the lifting blower's operation with other working components is achieved through electrical control. The combination of the cutting platform, returning to the field, and peeling operations is achieved through the main clutch control of the multi-way valve 9.

[0037] The operating principle is as follows: the engine pump 11, installed on the engine, provides power to the hydraulic control circuit and pressurized oil to the multi-way control valve 9. When the main clutch engagement button is pressed, the coil b1 of the main clutch disc valve of the multi-way control valve 9 is energized, the oil circuit at port A1 is connected, oil enters the main clutch cylinder 10, the main clutch tensioning mechanism is activated, and the main clutch engages and begins to work. Through electrical control, when the main clutch engagement button is pressed and the coil b1 of the main clutch disc valve of the multi-way control valve 9 is energized, the coil of the lifting fan hydraulic unloading valve 3 is also energized, the lifting fan overflow valve 4 establishes system pressure P1, and the BM series front cycloidal motor 6 and BM series rear cycloidal motor 8 begin to rotate. When the system pressure P1 exceeds the set pressure of the lifting fan overflow valve 4 or the local pressure P2 exceeds the set pressure of the safety valve 7 due to blockage, the fan overflow valve 4 or the safety valve 7 opens for overflow protection, ensuring that the lifting fan gear pump 1 or the BM series front cycloidal motor 6 will not be damaged due to overpressure.

Claims

1. A hydraulic drive device for a corn ear lifting fan, characterized in that, include: The components include: a lifting fan gear pump (1), a cooler (2), a lifting fan hydraulic unloading valve (3), a lifting fan overflow valve (4), a speed control valve (5), a BM series front cycloidal motor (6), a safety valve (7), a BM series rear cycloidal motor (8), a control multi-way valve (9), a main clutch cylinder (10), an engine pump (11), and a hydraulic oil tank (12). The lifting fan gear pump (1) is connected to the engine power output pulley via belt drive; The BM series front cycloidal motor (6) is provided with a front oil port (6A) and a front oil port (6B), and the BM series rear cycloidal motor (8) is provided with a rear oil port (8A) and a rear oil port (8B). The front oil outlet (6B) of the BM series front cycloidal motor (6) is connected to the rear oil inlet (8A) of the BM series rear cycloidal motor (8) to form a hydraulic series circuit. The hydraulic unloading valve (3) of the lifting fan is a normally open solenoid valve. Its oil inlet is connected to the oil outlet of the gear pump (1) of the lifting fan, and its oil return port is connected to the hydraulic oil tank (12). The main clutch oil circuit output end of the control multi-way valve (9) is connected to the main clutch oil cylinder (10), and the coil b1 of the control multi-way valve (9) is electrically linked with the coil of the lifting fan hydraulic unloading valve (3).

2. The hydraulic drive device for a corn ear lifting fan according to claim 1, characterized in that: In the hydraulic series circuit, the forward oil port (6A) of the BM series front cycloidal motor (6) is connected to the oil outlet of the lifting fan overflow valve (4), and the forward oil outlet (6B) of the BM series front cycloidal motor (6) is connected to the hydraulic oil tank (12) through the safety valve (7).

3. The hydraulic drive device for a corn ear lifting fan according to claim 1, characterized in that: When the hydraulic unloading valve (3) of the lifting fan is not energized, the hydraulic oil of the lifting fan gear pump (1) returns directly to the hydraulic oil tank (12); when energized, the hydraulic oil establishes system pressure (P1) through the lifting fan overflow valve (4) and drives the BM series front cycloidal motor (6).

4. The hydraulic drive device for a corn ear lifting fan according to claim 1, characterized in that: The cooler (2) is connected in series in the return oil line of the lifting fan gear pump (1) to reduce the temperature of the hydraulic oil.

5. The hydraulic drive device for a corn ear lifting fan according to claim 1, characterized in that: The speed control valve (5) is located on the oil outlet pipe of the BM series cycloidal motor (8) and is used to adjust the flow rate of the series circuit to control the fan speed.

6. The hydraulic drive device for a corn ear lifting fan according to claim 1, characterized in that: When the coil b1 of the control multi-way valve (9) is energized, the main clutch cylinder (10) enters the oil and engages the main clutch. At the same time, the hydraulic unloading valve (3) of the lifting fan is energized, so that the BM series front cycloidal motor (6) and the BM series rear cycloidal motor (8) start synchronously.

7. A hydraulic drive device for a corn ear lifting fan according to any one of claims 1 to 6, characterized in that: The inlet of the safety valve (7) is connected to the front outlet (6B) of the BM series cycloidal motor (6). The local pressure between the front outlet (6B) and the rear inlet (8A) is P2. When the local pressure (P2) exceeds the set value, the overflow protection is activated.

Images