A miniature proportional hydraulic reversing valve for a hydraulic model

Abstract

The application provides a micro proportional hydraulic reversing valve for a hydraulic model, and relates to the technical field of hydraulic control, which comprises a valve body, a rudder output main tooth connected with the valve body through a shaft coupling, and a motor arranged on one side of the rudder output main tooth; a valve core is arranged in the valve body, and threaded holes are formed in the top four corners of the valve core, and multiple positioning holes are formed in the working surfaces on the two sides of the valve core; the rudder output main tooth is meshed with the output end of the motor, a D-shaped shaft is arranged through the rudder output main tooth, and the D-shaped shaft is connected with the shaft coupling; the top end of the D-shaped shaft is connected with a potentiometer, and the potentiometer is electrically connected with an external control device; the motor drives the rudder output main tooth, and then drives the D-shaped shaft connected with the valve core to rotate, meanwhile, the potentiometer at the top end of the D-shaped shaft is electrically connected with the external control device, and the position information of the valve core can be fed back in real time, so that the pressure and flow of the hydraulic oil can be continuously and steplessly controlled.

Description

Technical Field

[0001] This invention relates to the field of hydraulic control technology, and in particular to a miniature proportional hydraulic directional valve for hydraulic models. Background Technology

[0002] Hydraulic directional valves are core components in hydraulic transmission and control systems. They change the on / off state and flow area of ​​the oil circuit inside the valve body through the relative movement of the valve core, thereby controlling the flow direction, pressure and flow rate of fluid in the hydraulic system. They are widely used in many fields such as engineering machinery, automated equipment, hydraulic teaching and training, and hydraulic simulation models.

[0003] Traditional hydraulic directional control valves only have two states: open and closed. This simple binary control method allows hydraulic systems to only achieve coarse switching when adjusting pressure and flow, failing to meet the needs of hydraulic models for fine-tuning pressure / flow under different operating conditions. Specifically, when simulating industrial production processes or complex mechanical movements with high requirements for pressure and flow changes, traditional directional control valves cannot continuously, accurately, and steplessly control pressure / flow, making it difficult for hydraulic models to accurately reproduce actual operating conditions and severely affecting the simulation accuracy and reliability of hydraulic models. Secondly, in the actual construction of hydraulic models, different application scenarios require different numbers of directional control systems to meet complex control requirements. However, due to the lack of reasonable connection structure design, it is difficult to achieve convenient and stable splicing between multiple directional control valves. This prevents users from flexibly building different numbers of directional control systems when facing different hydraulic model requirements, greatly limiting the adaptability and scalability of hydraulic models. Summary of the Invention

[0004] The purpose of this invention is to provide a miniature proportional hydraulic directional valve for hydraulic models, thereby solving the technical problems existing in the prior art.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0006] A miniature proportional hydraulic directional valve for hydraulic models includes: a valve body, a servo motor output main gear connected to the valve body via a coupling, and a motor located on one side of the servo motor output main gear; the valve body contains a valve core with threaded holes at the four corners of its top end and multiple positioning holes on its two working surfaces; the servo motor output main gear meshes with the output end of the motor, and a D-shaped shaft passes through it, the D-shaped shaft being connected to the coupling; the top end of the D-shaped shaft is connected to a potentiometer, and the potentiometer is electrically connected to an external control device.

[0007] Furthermore, the servo output main gear is provided with a servo front cover and a servo rear cover that engage with each other. The servo rear cover is provided with a connecting chamber for installing the potentiometer, and a wiring port is opened on one side for connecting power and control lines.

[0008] Furthermore, the servo front cover has multiple servo front cover mounting ears on both sides, and servo front cover mounting ears are provided with servo spacers. The working surface at the bottom end of the servo spacer is provided with external threads, and the external threads are threadedly connected to the threaded holes.

[0009] Furthermore, the bottom working surface of the valve core is connected to the valve body via a sealing plate; an oil seal is fitted onto the valve core, and the top working surface is connected to the coupling.

[0010] Furthermore, a preset working distance is maintained between the servo motor front cover and the valve body.

[0011] Furthermore, the coupling is located between the servo motor front cover and the valve body, and does not contact the servo motor front cover and the valve body.

[0012] Furthermore, the D-shaped shaft is fitted with a main shaft tail bearing, and the main shaft tail bearing coincides with the axis of the D-shaped shaft.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (i) This invention uses a motor to drive a servo motor to output the main gear, which in turn drives the D-shaped shaft connected to the valve core to rotate. At the same time, the potentiometer at the top of the D-shaped shaft is electrically connected to an external control device, which can provide real-time feedback on the valve core position information. Operators can precisely adjust the valve core position according to actual needs, thereby continuously and steplessly controlling the pressure and flow of hydraulic oil, meeting the requirements of the hydraulic model for fine adjustment of pressure / flow under different working conditions, and improving the control accuracy and stability of the hydraulic model.

[0015] (ii) The present invention enables multiple directional valves to be easily and securely connected together through the coordinated operation of positioning holes and positioning pins. In practical applications, users can flexibly splice multiple directional valves according to the specific needs of the hydraulic model to form directional systems with different numbers of paths, thereby enhancing the adaptability and scalability of directional valves in different hydraulic models and meeting the design requirements of various complex hydraulic systems. Attached Figure Description

[0016] Figure 1 This is a perspective view of a miniature proportional hydraulic directional valve for hydraulic models disclosed in this invention.

[0017] Figure 2 This is a schematic diagram of the internal structure of the servo motor rear cover of a miniature proportional hydraulic directional valve for hydraulic models disclosed in this invention.

[0018] Figure 3 This is a partial schematic diagram of a miniature proportional hydraulic directional valve for a hydraulic model disclosed in this invention.

[0019] Figure 4 This is a schematic diagram of the internal structure of a miniature proportional hydraulic directional valve for hydraulic models disclosed in this invention.

[0020] Figure 5 This is a three-dimensional view of the combined state of a miniature proportional hydraulic directional valve for a hydraulic model disclosed in this invention.

[0021] Figure 6 This is a rear view of a combined state of a miniature proportional hydraulic directional valve for a hydraulic model disclosed in this invention.

[0022] In the diagram: 1. Valve body; 2. Servo front cover; 201. Servo front cover mounting lug; 3. Servo rear cover; 301. Wiring port; 302. Connecting chamber; 4. Servo spacer; 5. Coupling; 6. Valve core; 7. Sealing plate; 8. Oil seal; 9. Motor; 10. Servo output main gear; 11. Main shaft tail bearing; 12. D-shaft; 13. Positioning pin. Detailed Implementation

[0023] To make the content of this invention easier to understand, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0024] like Figure 1-4As shown, this embodiment provides a miniature proportional hydraulic directional valve for a hydraulic model, including: a valve body 1, a servo motor output main gear 10 connected to the valve body 1 via a coupling 5, and a motor 9 located on one side of the servo motor output main gear 10; the valve body 1 contains a valve core 6, which provides installation space for the valve core 6, ensuring that the valve core 6 can operate flexibly within it, and its internal preset channel bridges the smooth flow of hydraulic oil, realizing the conduction and control of the oil circuit in the hydraulic system; the valve core 6 controls the oil circuit switch through its own movement, realizing the reversal operation of the hydraulic oil flow direction, precisely adjusting the hydraulic oil flow rate, and maintaining the stability of the system pressure under specific conditions, thereby meeting the diverse needs of the hydraulic model for hydraulic oil control under different working conditions; the valve body 1 has threaded holes at the four corners of its top end, and multiple positioning holes on its two working surfaces, which can be inserted with positioning pins 13 to connect multiple sets of equipment; the servo motor output... The main gear 10 meshes with the output end of the motor 9, receiving the powerful output of the motor 9. The motor 9 generates strong torque, driving the servo output main gear 10 to rotate. During the rotation of the servo output main gear 10, the power transmitted by the motor 9 is efficiently received, and the torque is precisely output through the D-shaped shaft 12 that passes through the servo output main gear 10, thereby driving the connected actuator to move and providing the necessary power support for the operation of the entire reversing valve. The D-shaped shaft 12 is connected to the coupling 5. The top end of the D-shaped shaft 12 is connected to a potentiometer, which is electrically connected to an external control device. Through its own rotation, the angle change is synchronously transmitted to the potentiometer. The potentiometer converts the angle information into an electrical signal and connects it to the external control device, so that the external control device can obtain the position information of the valve core 6 in real time and realize precise monitoring and control of the position of the valve core 6.

[0025] The D-shaped shaft 12 is sleeved with a main shaft tail bearing 11, and the main shaft tail bearing 11 coincides with the axis of the D-shaped shaft 12. The main shaft tail bearing 11 is made of high-performance bearing material, which has excellent wear resistance and low coefficient of friction. When the D-shaped shaft 12 rotates, it can effectively reduce the frictional resistance between the two, reduce energy loss, and thus improve the efficiency of the entire power transmission system. At the same time, the main shaft tail bearing 11 can withstand the axial and radial loads generated by the D-shaped shaft 12 during torque transmission, ensuring that the D-shaped shaft 12 always rotates smoothly along the predetermined axis, avoiding swaying or deviation due to uneven force.

[0026] like Figure 1As shown, the servo motor output main gear 10 is provided with a servo motor front cover 2 and a servo motor rear cover 3 that engage with each other, providing protection. A preset working distance is maintained between the servo motor front cover 2 and the valve body 1 to facilitate the installation of the servo motor. A connecting chamber 302 is provided inside the servo motor rear cover 3, which is used to install the potentiometer. The shape of the connecting chamber 302 is adapted to the potentiometer, enabling a stable installation. A wiring connection is provided on one side of the servo motor rear cover 3. Port 301 is used to connect power and control lines. The power supply provides power to the entire servo system, enabling it to operate normally. The control lines accurately transmit commands from the external control device to the servo system, achieving precise control over the servo output main gear 10 and the entire directional valve's operating status. The configuration of port 301 not only facilitates the connection and management of the lines but also ensures the stability and reliability of the electrical connection, providing a strong guarantee for the stable operation of the directional valve in complex and changing working environments.

[0027] like Figure 2 As shown, the servo front cover 2 has multiple servo front cover mounting ears 201 on both sides. The servo front cover mounting ears 201 are provided with servo spacers 4. The servo spacers 4 are used to fix the servo, and the bottom working surface is provided with external threads. The external threads are threaded to the threaded holes. Through the threaded connection between the servo spacers 4 and the threaded holes, the servo can be firmly fixed between the servo front cover 2 and the valve body 1, effectively avoiding the loosening or displacement of components caused by external forces such as vibration and impact.

[0028] like Figure 3 As shown, the coupling 5 is located between the servo motor front cover 2 and the valve body 1, and does not contact the servo motor front cover 2 and the valve body 1. This effectively avoids wear and damage to components that may be caused by long-term friction or vibration, ensuring that each component can operate independently and smoothly. It also provides conditions for the coupling 5 to efficiently transmit torque.

[0029] like Figure 4 As shown, the bottom working surface of the valve core 6 is connected to the valve body 1 through the sealing plate 7, which not only provides a reliable connection base for the valve core 6 and ensures that it can maintain a precise position in the valve body 1, but also achieves a good sealing effect, effectively preventing hydraulic oil leakage and maintaining stable system pressure. The valve core 6 is fitted with an oil seal 8, and the top working surface is connected to the coupling 5. The coupling 5 transmits the torque of the servo motor output main gear 10 to the valve core 6. The valve core 6 performs precise displacement and rotation in the valve body 1, thereby achieving precise control of the flow rate, flow direction and pressure of the hydraulic oil, meeting the diverse needs of the hydraulic model under different working conditions.

[0030] like Figure 5-6 As shown, during use, the operator can place multiple sets of directional valves axially according to actual needs, and then use the positioning pins 13 to pass through the positioning holes in sequence to firmly connect the multiple sets of directional valves, thereby forming a directional system with different number of paths. This enhances the adaptability and expandability of the directional valve in different hydraulic models, thus meeting the design requirements of various complex hydraulic systems.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A miniature proportional hydraulic directional valve for hydraulic models, characterized in that: include: Valve body (1), servo motor output main gear (10) connected to the valve body (1) via coupling (5), and motor (9) located on one side of the servo motor output main gear (10); The valve body (1) is provided with a valve core (6), and threaded holes are opened at the four corners of the top, and multiple positioning holes are provided on the working surfaces on both sides. The servo motor output main gear (10) meshes with the output end of the motor (9), and the D-shaped shaft (12) passes through it. The D-shaped shaft (12) is connected to the coupling (5). The top of the D-shaped shaft (12) is connected to a potentiometer, which is electrically connected to an external control device.

2. The miniature proportional hydraulic directional valve for hydraulic models according to claim 1, characterized in that: The servo output main gear (10) is provided with a servo front cover (2) and a servo rear cover (3) that engage with each other. The servo rear cover (3) is provided with a connecting chamber (302) for installing the potentiometer, and a wiring port (301) is opened on one side for connecting the power supply and control line.

3. The miniature proportional hydraulic directional valve for hydraulic models according to claim 2, characterized in that: The servo front cover (2) has multiple servo front cover mounting ears (201) on both sides. The servo front cover mounting ears (201) are provided with servo spacers (4). The working surface at the bottom of the servo spacer (4) is provided with external threads, and the external threads are threadedly connected to the threaded holes.

4. The miniature proportional hydraulic directional valve for hydraulic models according to claim 1, characterized in that: The bottom working surface of the valve core (6) is connected to the valve body (1) through the sealing plate (7); the valve core (6) is fitted with an oil seal (8), and the top working surface is connected to the coupling (5).

5. The miniature proportional hydraulic directional valve for hydraulic models according to claim 2, characterized in that: A preset working distance is left between the servo motor front cover (2) and the valve body (1).

6. The miniature proportional hydraulic directional valve for hydraulic models according to claim 5, characterized in that: The coupling (5) is located between the servo front cover (2) and the valve body (1) and does not contact the servo front cover (2) and the valve body (1).

7. The miniature proportional hydraulic directional valve for hydraulic models according to claim 1, characterized in that: The D-shaped shaft (12) is fitted with a main shaft tail bearing (11), and the main shaft tail bearing (11) coincides with the axis of the D-shaped shaft (12).

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