Hydraulic pressurizing clutch power assisting device of tractor

Abstract

The utility model discloses a hydraulic pressurizing clutch power assisting device of a tractor, which comprises a steering oil return pipe, and the lower end of the steering oil return pipe is fixedly connected with a three-stage overflow valve group. According to the structure, steering return oil serves as a clutch boosting oil source, the hydraulic boosting booster pump, the clutch boosting oil cylinder, the corresponding control valve and other components are used in cooperation, the steering return oil is used for providing an oil source for a whole hydraulic system, and meanwhile the hydraulic boosting booster pump is used for boosting hydraulic oil of the steering return oil; meanwhile, the clutch boosting oil cylinder is connected with a control mechanism of the clutch, and high-pressure oil output by the hydraulic pressurizing booster pump enters the clutch boosting oil cylinder to push an oil cylinder piston and a piston rod to move, so that a clutch control rod piece is driven to move, and connection and separation of the clutch are achieved; according to the method, an additional oil return structure is omitted, and the method has the characteristics of simple structure, low cost, convenience in operation, high reliability and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pressure boosting clutch, in particular to a hydraulic pressure boosting clutch assist device for a tractor. Background Art

[0002] In modern farming, as a common agricultural product, a tractor plays an important role in the planting and harvesting of agricultural products due to its characteristics of low price, convenient operation, simple structure, etc.

[0003] At present, most medium and large power tractors produced in China adopt independent double-acting dry friction clutches, and the engagement and separation of the main and auxiliary clutches mostly adopt manipulation methods such as mechanical linkages and flexible shafts, resulting in a relatively large manipulation force and a relatively high working intensity during long-term driving. Although some tractors have adopted hydraulic assist systems, there are still problems such as complex structure, high cost, or inconvenient pedal operation force. Therefore, a new hydraulic pressure boosting clutch assist device for a tractor is needed to solve such problems. Summary of the Utility Model

[0004] An object of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a hydraulic pressure boosting clutch assist device for a tractor. The device uses the steering return oil as the clutch assist oil source, a hydraulic pressure boosting assist pump, a clutch assist oil cylinder, and corresponding control valve components in cooperation. The steering return oil is used to provide the oil source for the entire hydraulic system, and at the same time, the hydraulic pressure boosting assist pump is used to boost the hydraulic oil of the steering return oil to increase the oil pressure. At the same time, the clutch assist oil cylinder is connected to the clutch operating mechanism, and the high-pressure oil output by the hydraulic pressure boosting assist pump enters the clutch assist oil cylinder to push the piston and piston rod of the oil cylinder to move, thereby driving the clutch operating rod to move, realizing the engagement and separation of the clutch. This method reduces the need for an additional oil return structure, and has the characteristics of simple structure, low cost, convenient operation, and high reliability.

[0005] To achieve the above object, the utility model also provides a steering return oil pipe with the above structure. The lower end of the steering return oil pipe is fixedly connected with a three-stage overflow valve group. One end of the steering return oil pipe far from the three-stage overflow valve group is fixedly connected with a boosting assist pump inlet pipe. One end of the boosting assist pump inlet pipe far from the steering return oil pipe is fixedly connected with a hydraulic pressure boosting assist pump. A assist oil pipe is fixedly connected to the hydraulic pressure boosting assist pump. One end of the assist oil pipe far from the hydraulic pressure boosting assist pump is fixedly connected with a clutch assist oil cylinder. A assist system return oil pipe is fixedly connected to the hydraulic pressure boosting assist pump.

[0006] According to the described tractor hydraulic pressure boosting clutch assist device, the materials of the steering return oil pipe, the boosting assist pump inlet oil pipe, the assist oil pipe and the assist system return oil pipe are rubber hoses, which can increase the overall airtightness. At the same time, the hoses have the characteristic of being not easily damaged, which can effectively increase the service life and the useful life.

[0007] According to the described tractor hydraulic pressure boosting clutch assist device, the hydraulic pressure boosting assist pump is electrically connected to an external power supply.

[0008] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The following further describes the present utility model in conjunction with the drawings and embodiments;

[0010] Figure 1 It is the overall structure diagram of a tractor hydraulic pressure boosting clutch assist device of the present utility model;

[0011] Figure 2 It is the schematic diagram of the upper oil flow direction structure of a tractor hydraulic pressure boosting clutch assist device of the present utility model.

[0012] LEGEND DESCRIPTION:

[0013] 1. Steering return oil pipe; 2. Boosting assist pump inlet oil pipe; 3. Hydraulic pressure boosting assist pump; 4. Assist oil pipe; 5. Clutch assist oil cylinder; 6. Assist system return oil pipe; 7. Three-stage overflow valve group. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.

[0015] Refer to Figure 1-2, in an embodiment of the utility model, a hydraulic pressure boosting and clutch assisting device for a tractor includes a steering return oil pipe 1. A three-stage overflow valve group 7 is fixedly connected to the lower end of the steering return oil pipe 1. One end of the steering return oil pipe 1 far from the three-stage overflow valve group 7 is fixedly connected to a boosting and assisting pump inlet pipe 2. One end of the boosting and assisting pump inlet pipe 2 far from the steering return oil pipe 1 is fixedly connected to a hydraulic pressure boosting and assisting pump 3. A assisting oil pipe 4 is fixedly connected to the hydraulic pressure boosting and assisting pump 3. One end of the assisting oil pipe 4 far from the hydraulic pressure boosting and assisting pump 3 is fixedly connected to a clutch assisting oil cylinder 5. A assisting system return oil pipe 6 is fixedly connected to the hydraulic pressure boosting and assisting pump 3. The materials of the steering return oil pipe 1, the boosting and assisting pump inlet pipe 2, the assisting oil pipe 4 and the assisting system return oil pipe 6 are rubber hoses, which can increase the overall airtightness. At the same time, the hoses have the characteristics of not being easily damaged, which can effectively increase the service life and the service years. The hydraulic pressure boosting and assisting pump 3 is electrically connected to an external power supply.

[0016] Working principle: First, the three-stage overflow valve group 7 sends the oil from the steering return oil pipe 1 through the boosting and assisting pump inlet pipe 2 to the hydraulic pressure boosting and assisting pump 3. Then, the oil is pressurized in the hydraulic pressure boosting and assisting pump 3 and sent from the assisting oil pipe 4 to the clutch assisting oil cylinder 5 for use. At the same time, a small part of the oil is pressurized in the hydraulic pressure boosting and assisting pump 3 and transmitted back to the three-stage overflow valve group 7 through the assisting system return oil pipe 6 to achieve the effect of assisting the return oil of the three-stage overflow valve group 7. At this time, the oil in the assisting system return oil pipe 6 can drive the oil to be output from the three-stage overflow valve group 7 to the steering return oil pipe 1 under pressure and sent to the hydraulic pressure boosting and assisting pump 3 through the boosting and assisting pump inlet pipe 2 for pressurization. By circulating in this way, the purpose of reducing the need for a return oil assisting setting is achieved. This method reduces the need for an additional return oil structure, adopts a modular design, the connections between components are compact, which is convenient for installation and maintenance, and there is no need for a complex accumulator and an additional power supply oil source, reducing the system cost. At the same time, the hydraulic pressure boosting technology significantly reduces the clutch operating force, improves the comfort and convenience of driving. Moreover, all components of the system are made of high-quality materials and have passed strict quality inspections to ensure the reliability and durability of the system.

[0017] The above has described the embodiments of the utility model in detail with reference to the accompanying drawings. However, the utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can be made without departing from the purpose of the utility model.

Claims

1. A hydraulic supercharging and clutch assist device for a tractor, characterized in that, Including: A steering return oil pipe (1), the lower end of the steering return oil pipe (1) is fixedly connected to a three-stage overflow valve group (7), one end of the steering return oil pipe (1) away from the three-stage overflow valve group (7) is fixedly connected to a booster pump inlet oil pipe (2), one end of the booster pump inlet oil pipe (2) away from the steering return oil pipe (1) is fixedly connected to a hydraulic booster pump (3), a booster oil pipe (4) is fixedly connected to the hydraulic booster pump (3), one end of the booster oil pipe (4) away from the hydraulic booster pump (3) is fixedly connected to a clutch booster oil cylinder (5), and a booster system return oil pipe (6) is fixedly connected to the hydraulic booster pump (3).

2. The hydraulic supercharging clutch assist device for a tractor according to claim 1, characterized in that, The materials of the steering return oil pipe (1), the booster pump inlet oil pipe (2), the booster oil pipe (4) and the booster system return oil pipe (6) are rubber hoses.

3. A hydraulic supercharging clutch assist device for a tractor according to claim 1, wherein, The hydraulic booster pump (3) is electrically connected to an external power supply.

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