Valve plate limiting structure of pressure regulating valve

Abstract

The utility model discloses a valve plate limiting structure of a pressure regulating valve, which comprises a regulating valve port arranged on a valve body, and a valve plate is arranged in the regulating valve port through a valve plate rotating shaft. A transition gear meshed with a motor gear of the motor is arranged in the valve body through a transition gear shaft, and a sector gear meshed with the transition gear is arranged on the valve plate rotating shaft. An initial position limiting hole and a final position limiting hole corresponding to limiting faces on the two sides of the sector gear are formed in the side ends of the valve body respectively, and an initial position limiting screw and a final position limiting screw are arranged in the initial position limiting hole and the final position limiting hole in a penetrating mode respectively. The sector gear is arranged on the rotating shaft of the valve plate, the sector gear is guaranteed to be located at the expected initial position and the expected final position by adjusting the length of the limiting screw protruding out of the initial position boss and the length of the limiting screw protruding out of the final position boss, namely the valve plate can be accurately located at the initial position and the final position after being installed, and product consistency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of EGR valves, and more specifically to a valve disc limiting structure of a pressure regulating valve. Background Technique

[0002] At present, with the upgrading of hybrid passenger car engine technology, in order to ensure high combustion efficiency of the engine, pressure regulating valves (also known as low-pressure EGR valves) have been increasingly used. They play an important role in reducing harmful substance emissions, improving engine working efficiency, extending engine service life, enhancing fuel economy, and protecting the three-way catalytic converter, and are an indispensable part of modern automotive emission control systems. Among them, as the engine combustion efficiency becomes higher and higher, it is necessary to control the exhaust gas volume through the pressure regulating valve more and more accurately, especially to accurately locate the two points of the initial position and the final position, and then perform programming settings, which plays a decisive role in the accurate position output of the final product.

[0003] However, the initial position and the final position of the conventional pressure regulating valve are directly cast integrally with the valve body. In addition, due to the mechanical tolerances during installation, the initial points and the final points of each valve assembly are inconsistent and there are deviations, which cannot be unified. Therefore, when the finished product is finally installed on the engine, there are still differences in the efficiency of each engine operating condition, and more seriously, there may be abnormal conditions such as knocking that can be directly felt by people, making it difficult to ensure the consistency of the product. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a valve disc limiting structure of a pressure regulating valve, so that the initial position and the final position can be accurately positioned after the valve disc is installed, and accurate output can be achieved after product programming, ensuring the consistency of the product.

[0005] To solve the above technical problems, the following technical solutions are adopted by the utility model.

[0006] A valve disc limiting structure of a pressure regulating valve includes a regulating valve port for gas flow provided on the valve body, and a valve disc is arranged in the regulating valve port through a valve disc rotating shaft; a transition gear meshing with the motor gear of the motor is arranged in the valve body through a transition gear shaft, and a sector gear meshing with the transition gear is arranged on the valve disc rotating shaft; initial position limiting holes and final position limiting holes corresponding to the two limiting surfaces of the sector gear are respectively opened at the side end of the valve body, and an initial position limiting screw and a final position limiting screw for limiting the sector gear are respectively inserted into the initial position limiting hole and the final position limiting hole.

[0007] Further optimizing the technical solution, initial position bosses and final position bosses for increasing the length of the limiting holes are respectively arranged inside the initial position limiting hole and the final position limiting hole.

[0008] Further optimize the technical solution, the initial position limit screw and the final position limit screw respectively protrude from the initial position boss and the final position boss.

[0009] Further optimize the technical solution, the initial position limit screw and the final position limit screw are respectively assembled in the initial position limit hole and the initial position boss, and the final position limit hole and the final position boss through threads.

[0010] Due to the adoption of the above technical solution, the technical progress achieved by the present utility model is as follows.

[0011] A valve plate limit structure of a pressure regulating valve provided by the present utility model sets a sector gear on the valve plate rotating shaft. By adjusting the lengths of the limit screws protruding from the initial position boss and the final position boss, it is ensured that the sector gear is in the desired initial position and final position, that is, the valve plate can be accurately positioned at the initial position and the final position after installation, and finally the accurate output after product programming is realized, while ensuring the consistency of the product. Description of the Drawings

[0012] Figure 1 is a structural schematic diagram of the present utility model;

[0013] Figure 2 is a side view schematic diagram of the valve plate limit structure of the present utility model on the transmission system side of the pressure regulating valve;

[0014] Figure 3 is a limit schematic diagram of the valve plate limit structure of the present utility model in the initial position;

[0015] Figure 4 is a limit schematic diagram of the valve plate limit structure of the present utility model in the final position.

[0016] Wherein: 1. valve body, 2. regulating valve port, 3. valve plate, 4. sector gear, 5. valve plate rotating shaft, 6. initial position boss, 7. final position boss, 8. initial position limit hole, 9. final position limit hole, 10. initial position limit screw, 11. final position limit screw, 12. intermediate gear shaft, 13. intermediate gear, 14. motor, 15. motor gear. Detailed Embodiment

[0017] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0018] A valve plate limit structure of a pressure regulating valve, as shown in combination with Figures 1 to 2 includes a regulating valve port 2 provided on the valve body 1, which is used as a channel for intercepting and flowing gas. A valve plate 3 is arranged in the regulating valve port 2 through a valve plate rotating shaft 5 to control the gas flow of the regulating valve port.

[0019] A motor 14 is provided inside the valve body 1. A motor gear 15 is provided on the motor 14. A transition gear 13 is provided inside the valve body 1 through a transition gear shaft 12. The transition gear 13 meshes with the motor gear 15. A sector gear 4 is provided on the valve disc rotating shaft 5. The sector gear 4 meshes with the transition gear 13. The motor drives the motor gear to rotate, the motor gear drives the transition gear to rotate, the transition gear drives the sector gear to rotate, and the transition gear drives the valve disc to rotate, so as to realize the adjustment of the gas flow rate at the valve port.

[0020] Initial position limit holes 8 and final position limit holes 9 are provided at the side end of the valve body 1. The initial position limit holes 8 and the final position limit holes 9 respectively correspond to the limit surfaces on both sides of the sector gear 4. The initial position limit surface corresponds to the initial position limit hole 8, and the final position limit surface corresponds to the final position limit hole 9. An initial position limit screw 10 and a final position limit screw 11 are respectively inserted into the initial position limit hole 8 and the final position limit hole 9 to limit the sector gear.

[0021] Initial position bosses 6 and final position bosses 7 are respectively provided inside the initial position limit holes 8 and the final position limit holes 9 to increase the length of the limit holes and improve the reliability and stability of positioning.

[0022] The initial position limit screw 10 and the final position limit screw 11 are respectively assembled in the initial position limit hole 8 and the initial position boss 6, and the final position limit hole 9 and the final position boss 7 through threads. And the initial position limit screw 10 and the final position limit screw 11 respectively extend out of the initial position boss 6 and the final position boss 7. The initial position limit screw 10 and the final position limit screw 11 respectively contact the limit surfaces on both sides of the sector gear 4 to ensure that the initial positions and the final positions of all products are exactly the same.

[0023] After all the components of the present utility model are assembled, the initial position limit screw and the final position limit screw are initially self-tapped and screwed into the initial position limit hole and the final position limit hole. By controlling the rotation of the motor to drive the motor gear to rotate, the motor gear rotates to drive the transition gear on the transition gear shaft to rotate, and finally the rotation of the sector gear is realized. The sector gear rotates, that is, the valve disc rotates. When the valve disc reaches the initial desired position (determined by the angle recognition device on the equipment), the equipment automatically continues to tighten the initial position limit screw until it abuts against the initial limit surface of the sector gear and completes the initial position programming operation, as Figure 3 shown in the position; then control the motor to run in the reverse direction, with the same force transmission process, so that the valve disc rotates in the reverse direction to the final desired position (determined by the angle recognition device on the equipment), and the equipment automatically continues to tighten the final position limit screw until it abuts against the final limit surface of the sector gear and completes the final position programming operation, as Figure 4The position shown. Since then, the programming task has been completed, thus ensuring the consistency of the initial and final positions of all product valve plates, further ensuring the working accuracy of the product, and ensuring the final usage state of the product at the customer's place.

Claims

1. A valve disc limiting structure of a pressure regulating valve, comprising a regulating valve port (2) for gas flow arranged on a valve body (1), and a valve disc (3) is arranged in the regulating valve port (2) through a valve disc rotating shaft (5); characterized in that: Inside the valve body (1), a transition gear (13) meshing with the motor gear (15) of the motor (14) is arranged through a transition gear shaft (12), and a sector gear (4) meshing with the transition gear (13) is arranged on the valve disc rotating shaft (5); initial position limiting holes (8) and final position limiting holes (9) corresponding to the two limiting surfaces of the sector gear (4) are respectively formed at the side ends of the valve body (1), and an initial position limiting screw (10) and a final position limiting screw (11) for limiting the sector gear are respectively inserted into the initial position limiting hole (8) and the final position limiting hole (9).

2. The limited position structure of a pressure regulating valve disc according to claim 1, wherein: Initial position bosses (6) and final position bosses (7) for increasing the length of the limiting holes are respectively arranged inside the inner sides of the initial position limiting hole (8) and the final position limiting hole (9).

3. A valve disc limiting structure of a pressure regulating valve according to claim 2, characterized in that: The initial position limiting screw (10) and the final position limiting screw (11) respectively protrude from the initial position boss (6) and the final position boss (7).

4. A valve disc limit structure of a pressure regulating valve according to claim 2, characterized in that: The initial position limiting screw (10) and the final position limiting screw (11) are respectively assembled in the initial position limiting hole (8) and the initial position boss (6) and the final position limiting hole (9) and the final position boss (7) through threads.

Images