Mechanism for regulating and controlling pressure of high-speed stubble cleaning harrow group by energy

Abstract

A mechanism for regulating and controlling pressure of a high-speed stubble cleaning harrow group by an energy accumulator belongs to agricultural machinery. The hydraulic oil cylinder and the harrow frame are hinged to the upper end and the lower end of the front side of the single frame in an up-down swinging mode respectively, the harrow piece set is rotatably supported and installed on the lower portion of the rear side of the harrow frame, the hinge seat is fixedly installed on the harrow frame, an oil cylinder rod of the hydraulic oil cylinder is hinged to the hinge seat, and the energy accumulator is fixedly installed on the upper end of the rear side of the single frame. The two ends of an oil pipe provided with an oil pressure monitoring valve and a nitrogen pressure gauge are connected to the hydraulic oil cylinder and the energy accumulator respectively to communicate the hydraulic oil cylinder and the energy accumulator. According to the mechanism, multiple functions of the energy accumulator are fully exerted and utilized, the working quality of the high-speed stubble cleaning harrow group and the safety effect of overload protection machines and tools are guaranteed and improved, the working adaptability of the high-speed stubble cleaning harrow group is improved, the working operation is stable, smooth and flexible, the noise is low, and the pressure regulation and control range is large.

Description

Technical Field

[0001] This utility model belongs to agricultural machinery and mainly relates to a mechanism that uses an accumulator to regulate the pressure of a high-speed stubble-removing harrow assembly during operation. Background Technology

[0002] During operation, the high-speed stubble harrow assembly, specifically its contour-following capability and overload protection, plays a crucial role in the harrow assembly's operational effectiveness, quality, adaptability, and safety. Currently, high-speed stubble harrow assemblies mostly use pressure springs or elastic rubber rods as control components for contour-following motion and overload protection. However, years of practical experience in production operations have revealed that pressure springs and elastic rubber rods have a small pressure adjustment range, a narrow applicable scope, high labor intensity and low efficiency in adjustment operations, low pressure adjustment accuracy, weak ability to absorb and reduce impact vibration, and short service life, thus reducing the effectiveness of contour-following motion and overload protection. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the prior art and, in light of the actual needs of high-speed stubble harrows in current agricultural production, to develop a high-speed stubble harrow assembly pressure mechanism controlled by an accumulator. This mechanism aims to achieve high-speed stubble harrow assembly with strong motion conformity and overload protection, good working effect, high working quality and safety, stable machine operation, low noise and long service life.

[0004] The basic design of this utility model is as follows: a hydraulic cylinder and a harrow frame are hinged and mounted on the upper and lower ends of the front side of the single frame, respectively, and the harrow blade assembly is rotatably supported and mounted on the lower rear side of the harrow frame. The hinge seat is fixedly mounted on the upper rear side of the harrow frame. The cylinder rod of the hydraulic cylinder is hinged to the hinge seat. An accumulator is fixedly mounted on the upper rear side of the single frame. The front and rear ends of the oil pipe are respectively connected to the hydraulic cylinder and the accumulator, connecting the accumulator and the hydraulic cylinder. An oil pressure monitoring valve and a nitrogen pressure gauge are respectively installed on the oil pipe. This constitutes the accumulator-controlled high-speed stubble-killing harrow assembly pressure mechanism.

[0005] This utility model utilizes an accumulator, an energy storage device in a hydraulic-pneumatic system, as a control component for contour control and overload protection of the high-speed stubble harrow assembly. It fully leverages the accumulator's functions of storing energy, absorbing impact, eliminating pulsations, recovering energy, providing simple and precise pressure adjustment, and having strong applicability. This ensures and improves the operational quality of the high-speed stubble harrow assembly and the effectiveness of overload protection for the equipment. Furthermore, the output pressure of the accumulator can be accurately and conveniently adjusted according to operational requirements, land conditions, and other factors, expanding the operational adaptability of the high-speed stubble harrow assembly. The mechanism operates smoothly, quietly, and with a wide range of pressure control for the high-speed stubble harrow assembly. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the overall structure of the accumulator-controlled high-speed stubble harrow group pressure mechanism.

[0007] Part number description in the image:

[0008] 1. Single frame, 2. Hydraulic cylinder, 3. Oil pressure monitoring valve, 4. Oil pipe, 5. Nitrogen pressure gauge, 6. Accumulator, 7. Hinge seat, 8. Rake blade assembly, 9. Rake frame. Detailed Implementation

[0009] The following is a detailed description of the embodiments of this utility model with reference to the accompanying drawings. An accumulator-controlled high-speed stubble harrow assembly pressure mechanism includes an accumulator 6. A hydraulic cylinder 2 and a harrow frame 9 are hinged to the upper and lower ends of the front side of a single frame 1, respectively, and can swing up and down. A harrow blade assembly 8 is rotatably supported on the lower rear side of the harrow frame 9. A hinge seat 7 is fixedly mounted on the upper rear side of the harrow frame 9. The cylinder rod of the hydraulic cylinder 2 is hinged to the hinge seat 7. The accumulator 6 is fixedly mounted on the upper rear side of the single frame 1. The front and rear ends of an oil pipe 4 are connected to the hydraulic cylinder 2 and the accumulator 6, respectively, connecting the accumulator 6 and the hydraulic cylinder 2. An oil pressure monitoring valve 3 and a nitrogen pressure gauge 5 are respectively installed on the oil pipe 4.

[0010] During operation, the high-speed stubble harrow assembly moves forward rapidly under the traction of the power machinery. The harrow blades 8, which are in close contact with the field ground, roll forward under the action of soil resistance, completing the high-speed chopping and harrowing of straw, stubble, and soil on the field. At the same time, under the upward reaction force of straw, stubble, and soil, the hydraulic oil of the accumulator 6 maintains downward pressure on the harrow blades 8 through the oil pipe 4, hydraulic cylinder 2, hinge seat 7, and harrow frame 9, causing the harrow blades 8 to perform a contour-following motion of up and down floating. While ensuring the quality and effect of the operation, it also plays an overload protection role, avoiding and eliminating damage to the machine. When adjusting the downward pressure of the harrow blade assembly 8 based on soil hardness, specific resistance, straw length and quantity, and stubble preparation depth, the hydraulic oil pressure within the accumulator 6 can be increased or decreased by introducing or releasing pressurized nitrogen. This changes the pressure within the hydraulic cylinder 2, thereby adjusting the downward pressure of the harrow blade assembly 8 and achieving the desired adjustment of the contour pressure. This pressure adjustment has a wide range and strong applicability, achieving the technical objectives and effects of this solution. When introducing or releasing pressurized nitrogen into the accumulator 6, the nitrogen pressure gauge 5 reflects the pressure in the accumulator 6 in real time, ensuring high adjustment accuracy. During stubble removal, the oil pressure monitoring valve 3 monitors the hydraulic oil pressure in the hydraulic cylinder 2 in real time, ensuring operational stability and quality.

Claims

1. A pressure control mechanism for a high-speed stubble harrow assembly using an accumulator, comprising an accumulator (6), characterized in that: A hydraulic cylinder (2) and a rake frame (9) are hinged to the upper and lower ends of the front side of the single frame (1), respectively, and can swing up and down. A rake blade assembly (8) is rotatably supported on the lower rear side of the rake frame (9). A hinge seat (7) is fixedly mounted on the upper rear side of the rake frame (9). The cylinder rod of the hydraulic cylinder (2) is hinged to the hinge seat (7). An accumulator (6) is fixedly mounted on the upper rear side of the single frame (1). The front and rear ends of the oil pipe (4) are connected to the hydraulic cylinder (2) and the accumulator (6), respectively, so that the accumulator (6) and the hydraulic cylinder (2) are interconnected. An oil pressure monitoring valve (3) and a nitrogen pressure gauge (5) are installed on the oil pipe (4).

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