Power reversing valve group for tractor

Abstract

The utility model discloses a power reversing valve group for a tractor, which comprises a main valve block, an electric proportional pressure reducing valve is arranged on the left side of the upper part of the main valve block, a pressure switch is arranged in front of the main valve block, a first copper pad is connected behind the pressure switch in a sliding manner, and pressure measuring joints are arranged on the upper side and the lower side of the front part of the main valve block; a pressure measuring connector is arranged below the main valve block, an energy accumulator is arranged on the left side of the front portion of the main valve block, a second copper pad is arranged behind the energy accumulator, a temperature sensor is arranged below the main valve block, a double-end electromagnetic reversing valve is arranged on the right side of the upper portion of the main valve block, and a plug is arranged on the right side of the main valve block. And a third copper pad is arranged on the left side of the plug. Through the structure, the valve group is high in integration level, simple and easy to control, each functional oil duct is provided with a pressure measuring connector so as to facilitate debugging and fault detection, and the electric unit is used for controlling, so that the power reversing function of the tractor is effectively achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of reversing valve groups, in particular to a power reversing valve group for tractors. Background Art

[0002] Directional valves are key components used to control fluid flow in hydraulic and pneumatic systems. Their primary function is to switch fluid between different operating states to achieve various mechanical actions. The design and configuration of directional valves are crucial to ensuring accurate system operation and performance. Below is some basic information and key types of directional valves: Basic Functions and Applications: Directional Control: Directional valves are used to change the direction of fluid flow in hydraulic or pneumatic systems, thereby changing the direction of motion of actuators such as hydraulic or pneumatic cylinders. Controlling Multiple Motions: By controlling fluid direction, directional valves can enable machines or equipment to perform a variety of actions, such as lifting, thrusting, and rotating. Key Types: Hydraulic Directional Valve: Solenoid-operated directional valves use electromagnets to control the valve's opening and closing states and are suitable for highly automated systems. Manual directional valves: Manually operated directional valves control the valve's opening and closing states and are commonly used in manually controlled hydraulic systems. Pneumatic directional valves: Used in pneumatic systems, they typically include solenoid-operated and manual pneumatic valves. Pneumatic Directional Valve: Two-way valves: Dual-channel, one-way control valves for basic on / off control. 3 / 2-way valves: Commonly used to control single-acting cylinders, they can switch between two states. 5 / 2-way valves: Used to control double-acting cylinders, they offer a wider range of functional options. Structure and Components: Valve body: The main part of a directional valve, containing the valve orifice and fluid channels, used to control the direction of fluid flow. Valve core: The moving component, whose position allows for different fluid channel configurations. Actuator: The component that actuates the valve core, which can be a solenoid coil, manual lever, or pneumatic device. Selection and Configuration: Flow and Pressure: Select appropriate flow and pressure levels based on the system's operating requirements to ensure the valve manifold meets the system's requirements. Control Method: Select the appropriate control method—electromagnetic, manual, or pneumatic—to match the system's level of automation and operating methods. Installation and Maintenance: Ensure the valve manifold is installed in accordance with system design requirements, and perform regular inspection and maintenance to maintain proper operation. Common Applications: Industrial Machinery: Used to control the movement of industrial machinery, such as hydraulic shears and presses. Automotive Manufacturing: Used to control automotive hydraulic systems, such as brakes and suspension systems. Construction Engineering: Used to operate construction equipment, such as excavators and cranes. Directional valve groups play an important role in various hydraulic and pneumatic systems. Correct selection and configuration of these valve groups are crucial to ensure efficient and stable operation of the system.

[0003] In the existing technology, firstly, with the continuous improvement of the hydraulic control technology level of tractors at home and abroad, on domestically produced high-power wheeled tractors, the tractors need to cut off the power source when changing direction, and then realize it through the meshing of gears. This makes the switching process complicated, the driver's workload is large, and it is easy for gears to cause tooth-snapping, resulting in switching failure. Therefore, through an electronically controlled tractor power reversing control valve block assembly, the tractor's power reversing is achieved by the engagement and separation of the solenoid valve, which can conveniently and quickly realize the tractor's power reversing without cutting off the power source, and also reduce the driver's workload. Secondly, there are various types of domestic tractor power reversing valve groups, but the general structure is slightly complicated. Therefore, the market needs a reversing valve group with a simple structure, high reliability, precise control and high maintainability. Utility Model Content

[0004] The purpose of the utility model is to provide a power reversing valve group for tractors, which can make the valve group highly integrated and simple and easy to control. Each functional oil channel is equipped with a pressure measuring joint for easy debugging and fault detection, and the electrical unit control therein effectively meets the realization of the power reversing function of the tractor.

[0005] To achieve the above-mentioned purpose, a power reversing valve group for a tractor is provided, comprising a main valve block, an electric proportional pressure reducing valve is arranged on the upper left side of the main valve block, a pressure switch is arranged in front of the main valve block, a first copper pad is slidably connected to the rear of the pressure switch, pressure measuring joints are arranged on the upper and lower sides of the front of the main valve block, a pressure measuring joint is arranged below the main valve block, an accumulator is arranged on the front left side of the main valve block, a second copper pad is arranged behind the accumulator, a temperature sensor is arranged below the main valve block, a double-headed electromagnetic reversing valve is arranged on the upper right side of the main valve block, a screw plug is arranged on the right side of the main valve block, and a third copper pad is arranged on the left side of the screw plug.

[0006] According to the power reversing valve group for a tractor, a first sealing ring is provided on the right side of the rear of the main valve block, and a second sealing ring is provided on the left side of the rear of the main valve block.

[0007] According to the power reversing valve group for a tractor, bolts are connected through the upper and lower sides of the front of the main valve block, and flat washers are provided behind the bolts.

[0008] According to the power reversing valve assembly for a tractor, the flat washer is located in front of the main valve block, and the flat washer fits tightly with the main valve block.

[0009] According to the power reversing valve group for a tractor, the first copper gasket is located in front of the main valve block, and the first copper gasket is tightly fitted to the main valve block.

[0010] According to the power reversing valve group for a tractor, the second copper gasket is located on the front right side of the main valve block, and the second copper gasket is tightly fitted to the main valve block.

[0011] According to the power reversing valve group for a tractor, the third copper gasket is located on the right side of the main valve block, and the third copper gasket is tightly fitted to the main valve block.

[0012] The utility model has the following beneficial effects:

[0013] 1. Compared with the existing technology, this tractor power reversing valve group realizes flexible control of the tractor clutch by cooperating with electronic control, which can realize the flexible reversing switching function of the tractor forward and reverse. The valve group also contains a lubricating oil channel, which can provide lubrication and flushing function for the clutch pack. This valve group has high integration and is simple and easy to control. Each functional oil channel is equipped with a pressure measuring connector for easy debugging and fault detection.

[0014] 2. Compared with the prior art, this tractor power reversing valve group, the utility model discloses a tractor power reversing valve group, mainly including a main valve block, an electric proportional pressure reducing valve, a double-headed electromagnetic reversing valve, an accumulator, a temperature sensor, a pressure switch, three pressure measuring joints, a plug, an O-ring for sealing and mounting bolts, gaskets, etc. The above are effectively controlled by an electrical unit to meet the realization of the tractor's power reversing function.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a three-dimensional diagram of a power reversing valve group for a tractor according to the utility model;

[0018] Figure 2 This is an exploded view of the internal structure of a power reversing valve group for tractors according to the present invention;

[0019] Figure 3 The utility model is a valve group hydraulic principle diagram of a power reversing valve group for tractors.

[0020] Legend:

[0021] 1. Main valve block; 2. Electric proportional pressure reducing valve; 3. First sealing ring; 4. Second sealing ring; 5. Flat washer; 6. Bolt; 7. First copper gasket; 8. Pressure switch; 9. Pressure measuring joint; 10. Accumulator; 11. Second copper gasket; 12. Temperature sensor; 13. Double-headed solenoid reversing valve; 14. Third copper gasket; 15. Screw plug. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0023] Reference Figure 1-3 , the utility model embodiment of a power reversing valve group for a tractor, which includes a main valve block 1, an electric proportional pressure reducing valve 2 is provided on the upper left side of the main valve block 1, a first sealing ring 3 is provided on the rear right side of the main valve block 1, and a second sealing ring 4 is provided on the rear left side of the main valve block 1. Bolts 6 are connected through the upper and lower sides of the front of the main valve block 1, and a flat washer 5 is provided behind the bolt 6. The flat washer 5 is located in front of the main valve block 1 and fits tightly with the main valve block 1. A pressure switch 8 is provided in front of the main valve block 1, and a first copper gasket 7 is slidably connected to the rear of the pressure switch 8. The first copper gasket 7 is located in front of the main valve block 1 and fits tightly with the main valve block 1. Fitting, pressure measuring joints 9 are provided on the upper and lower sides of the front of the main valve block 1, a pressure measuring joint 9 is provided at the bottom of the main valve block 1, an accumulator 10 is provided on the left side of the front of the main valve block 1, a second copper pad 11 is provided behind the accumulator 10, the second copper pad 11 is located on the right side of the front of the main valve block 1, the second copper pad 11 is tightly fitted with the main valve block 1, a temperature sensor 12 is provided at the bottom of the main valve block 1, a double-headed electromagnetic reversing valve 13 is provided on the right side of the upper part of the main valve block 1, a screw plug 15 is provided on the right side of the main valve block 1, a third copper pad 14 is provided on the left side of the screw plug 15, the third copper pad 14 is located on the right side of the main valve block 1, and the third copper pad 14 is tightly fitted with the main valve block 1.

[0024] The above structure is provided with a main valve block 1, and a variety of mounting holes are opened on the top of the main valve block 1, so that the main valve block 1 can be installed with various plug-in components. The oil channel is opened inside the main valve block 1 to achieve the disconnection and connection between various components.

[0025] By providing an electric proportional pressure reducing valve 2, the valve core opening is controlled by electrically controlling the current input of the electric proportional valve, thereby controlling the circuit pressure.

[0026] The first sealing ring 3 and the second sealing ring 4 are provided to seal the valve group when it is installed on the transmission housing.

[0027] The position of the valve group can be fixed by providing a flat washer 5 and a bolt 6.

[0028] The first copper gasket 7 is provided to seal the pressure switch 8 .

[0029] The provision of a pressure measuring joint 9 makes it convenient to debug and test the pressure.

[0030] The accumulator 10 is provided so that the pressure pulse of the system can be absorbed and the control accuracy of the power reversing system can be improved. The second copper pad 11 is provided so that the installation of the accumulator 10 can be sealed.

[0031] Working Principle: The steering hydraulic system's oil return, in conjunction with the electronic control unit, controls the power reversing valve group, enabling smooth and comfortable forward and reverse movement of the tractor. The steering hydraulic system's oil return, in conjunction with the electronic control unit, controls the reversing valve integrated valve group, enabling control of the tractor's rear PTO clutch and differential lock functions. The steering hydraulic system's oil return, in conjunction with the pressure control valve group, lubricates some of the tractor's drive shafts and dissipates heat from the system.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A power reversing valve group for tractors, characterized in that: The invention comprises a main valve block (1), an electric proportional pressure reducing valve (2) is provided on the upper left side of the main valve block (1), a pressure switch (8) is provided in front of the main valve block (1), a first copper pad (7) is slidably connected to the rear of the pressure switch (8), pressure measuring joints (9) are provided on the upper and lower sides of the front of the main valve block (1), a pressure measuring joint (9) is provided below the main valve block (1), an accumulator (10) is provided on the left side of the front of the main valve block (1), a second copper pad (11) is provided behind the accumulator (10), a temperature sensor (12) is provided below the main valve block (1), a double-headed electromagnetic reversing valve (13) is provided on the upper right side of the main valve block (1), a screw plug (15) is provided on the right side of the main valve block (1), and a third copper pad (14) is provided on the left side of the screw plug (15).

2. A power reversing valve assembly for a tractor according to claim 1, characterized in that: A first sealing ring (3) is provided on the right side of the rear of the main valve block (1), and a second sealing ring (4) is provided on the left side of the rear of the main valve block (1).

3. The power reversing valve assembly for tractors according to claim 1, characterized in that: Bolts (6) are connected through the upper and lower sides of the front of the main valve block (1), and a flat washer (5) is provided behind the bolts (6).

4. A power reversing valve assembly for a tractor according to claim 3, characterized in that: The flat washer (5) is located in front of the main valve block (1), and the flat washer (5) is tightly fitted to the main valve block (1).

5. The power reversing valve assembly for tractors according to claim 1, characterized in that: The first copper pad (7) is located in front of the main valve block (1), and the first copper pad (7) is tightly fitted to the main valve block (1).

6. The power reversing valve assembly for tractors according to claim 1, characterized in that: The second copper pad (11) is located on the front right side of the main valve block (1), and the second copper pad (11) is tightly fitted to the main valve block (1).

7. The power reversing valve assembly for a tractor according to claim 1, characterized in that: The third copper pad (14) is located on the right side of the main valve block (1), and the third copper pad (14) is tightly fitted to the main valve block (1).

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