Oil inlet and outlet pipe switching structure of oil injection pump

Abstract

The utility model discloses a fuel injection pump oil inlet and outlet pipe switching structure, which belongs to the technical field of fuel supply systems, and comprises a structure main body, one side of the structure main body is provided with a thrust plate mounting surface, and the outer side of the thrust plate mounting surface is respectively provided with an oil outlet and an oil inlet. An oil return channel corresponding to the oil outlet is formed in the structure body, an oil inlet channel corresponding to the oil inlet is formed in the structure body, an oil sprayer oil inlet hole is formed in the position, close to the oil inlet, of the outer wall of the structure body, and an oil sprayer oil return hole is formed in the position, close to the other side, of the outer wall of the structure body. The thrust plate and the sealing block are installed at the joint of the structure body, the thrust plate can reduce friction and abrasion, the thrust plate is usually made of abrasion-resistant materials, can bear long-term friction and is not prone to being damaged, and the sealing block can prevent fuel oil from leaking and keep pressure of a system stable.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel supply systems, and particularly relates to a connecting structure for the inlet and outlet pipes of a fuel injection pump. Background Art

[0002] With the continuous development of the automotive industry, the performance and reliability requirements of engines are getting higher and higher. As the core component of the engine fuel supply system, the working performance of the fuel injection pump directly affects the power output, fuel economy and emission level of the engine. The connecting structure for the inlet and outlet pipes of the fuel injection pump plays a crucial role in connection and transmission in the whole fuel system. The connecting structure for the inlet and outlet pipes of the fuel injection pump has been continuously innovated and improved with the development of engine technology, and it plays an important role in improving the performance and reliability of the fuel system, making a positive contribution to the development of the automotive industry.

[0003] The traditional connecting structure for the inlet and outlet pipes of the fuel injection pump is connected through a three-way joint. The interface of the three-way joint is very easy to leak oil, and due to its overly small structure, it is time-consuming and laborious to install or disassemble. Moreover, due to the continuous vibration generated by the long-term operation of the engine, the connecting structure of this type of fuel injection pump inlet and outlet pipe is not firmly fixed, resulting in the loosening of the connecting structure and affecting subsequent fuel transportation.

[0004] Therefore, it is urgently necessary to provide a connecting structure for the inlet and outlet pipes of a fuel injection pump to solve the above problems. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the above-mentioned disadvantages of the prior art and provide a connecting structure for the inlet and outlet pipes of a fuel injection pump.

[0006] To solve the above technical problem, a technical solution adopted by the utility model is: to provide a connecting structure for the inlet and outlet pipes of a fuel injection pump, including a structural main body. A thrust washer mounting surface is provided on one side of the structural main body, and an oil outlet and an oil inlet are respectively opened outside the thrust washer mounting surface;

[0007] A return oil passage corresponding to the oil outlet is installed inside the structural main body, and an oil inlet passage corresponding to the oil inlet is installed inside the structural main body;

[0008] An injector oil inlet hole is opened on the outer wall of the structural main body near the oil inlet position, an injector return oil hole is opened on the outer wall of the structural main body near the other side position, first and second bolt holes are respectively installed on the outer wall of the structural main body, and a second mounting surface is provided at the bottom of the structural main body.

[0009] The utility model is further arranged as: a thrust washer is installed outside the thrust washer mounting surface.

[0010] Through the above technical solution, the thrust piece can effectively limit the movement of the fuel injection pump in the axial direction, preventing it from undergoing excessive displacement due to various forces generated during engine operation. This helps ensure that the fuel injection pump always remains in the correct working position, improving the stability of the entire system. The thrust piece can provide a buffer layer between the fuel injection pump and other components, reducing direct contact and wear between them. This helps extend the service life of the fuel injection pump and other components and reduce maintenance costs.

[0011] The present utility model is further configured such that: a sealing block is installed on the outer side of the thrust piece.

[0012] Through the above technical solution, the sealing block can effectively prevent fuel, lubricating oil, or other working media from leaking at the connection between the fuel injection pump and related components. This is crucial for ensuring the normal operation of the fuel injection pump because leakage not only leads to performance degradation but may also pose safety hazards. The sealing block can also prevent impurities such as dust, dirt, and moisture from entering the area between the fuel injection pump and the thrust piece. These impurities may wear the thrust piece and other components, reducing their service life. The presence of the sealing block can reduce such wear and extend the life of the components.

[0013] The present utility model is further configured such that: fuel pipes are installed inside both the fuel inlet hole and the fuel return hole of the injector.

[0014] Through the above technical solution, the fuel pipes can ensure a stable and consistent flow path for fuel from the fuel supply system to the fuel inlet hole of the injector. The fuel pipes can also play a buffering role, reducing pressure fluctuations during fuel transmission.

[0015] The present utility model is further configured such that: bolts are hingedly connected to the front ends of both the fuel inlet hole and the fuel return hole of the injector.

[0016] Through the above technical solution, the hingedly connected bolts make the connection between the injector and the fuel inlet and return pipelines more convenient. During installation, simply rotating the bolts to the appropriate positions can achieve quick connection, greatly saving installation time.

[0017] The present utility model is further configured such that: the fuel inlet hole of the injector is connected to the corresponding fuel inlet passage, and the fuel return hole of the injector is connected to the corresponding fuel return passage.

[0018] Through the above technical solution, the fuel inlet passage continuously supplies the required fuel to the injector. After connection, it enables the fuel to reach the injector smoothly and in a timely manner, avoiding situations of fuel supply interruption or insufficiency. The fuel return passage provides a return path for the excess fuel in the injector. After connection, it can keep the fuel pressure in the injector within an appropriate range. When the injector injects fuel, the remaining fuel flows through the fuel inlet hole of the injector into the fuel return passage and returns to the fuel system.

[0019] The present utility model is further configured such that: threaded bolts are rotatably connected inside both the first bolt hole and the second bolt hole.

[0020] Through the above technical solution, the rotation operation of the threaded bolt is relatively simple and fast. Workers can easily screw the threaded bolt into the bolt hole using tools such as a wrench, achieving rapid assembly of components.

[0021] The beneficial effects of the present utility model are as follows:

[0022] 1. In the present utility model, a thrust washer and a sealing block are installed at the connection of the structural body. When relative movement occurs between the structural bodies, the thrust washer can reduce friction and wear. The thrust washer is usually made of wear-resistant material and can withstand long-term friction without being easily damaged. The sealing block can prevent fuel leakage and maintain the pressure stability of the system.

[0023] 2. In the present utility model, multiple bolts are used to fix the structural body. When the engine operates for a long time, vibrations will be generated. Through the multiple bolts, the structural body will not easily fall off under the vibrations of the engine, affecting subsequent fuel injection and return. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view of the present utility model;

[0025] Figure 2 is a schematic diagram of the second mounting surface structure of the present utility model;

[0026] Figure 3 is a side view of the present utility model;

[0027] Figure 4 is a schematic diagram of the oil return passage structure of the present utility model.

[0028] In the figure: 1, structural body; 2, thrust washer mounting surface; 3, oil outlet; 4, oil return passage; 5, oil inlet; 6, oil inlet passage; 7, fuel injector inlet hole; 8, fuel injector return hole; 9, first bolt hole; 10, second bolt hole; 11, second mounting surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following elaborates on the preferred embodiments of the present utility model in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making the scope of protection of the present utility model more clearly defined.

[0030] Please refer to Figure 1 and Figure 2, A transfer structure for the inlet and outlet pipes of a fuel injection pump, comprising a structural main body 1. On one side of the structural main body 1, there is a thrust washer mounting surface 2. A thrust washer is installed outside the thrust washer mounting surface 2. The thrust washer can effectively limit the axial movement of the fuel injection pump, preventing it from undergoing excessive displacement due to various forces generated during engine operation. This helps ensure that the fuel injection pump always remains in the correct working position, improving the stability of the entire system. The thrust washer can provide a buffer layer between the fuel injection pump and other components, reducing the direct contact and wear between them. This helps extend the service life of the fuel injection pump and other components and reduces maintenance costs. A sealing block is installed outside the thrust washer. The sealing block can effectively prevent the leakage of fuel, lubricating oil, or other working media from the connection between the fuel injection pump and related components. This is crucial for ensuring the normal operation of the fuel injection pump because leakage not only leads to performance degradation but may also pose safety hazards. The sealing block can also prevent impurities such as dust, dirt, and moisture from entering the area between the fuel injection pump and the thrust washer. These impurities may wear the thrust washer and other components, reducing their service life. The presence of the sealing block can reduce this wear and extend the life of the components. An oil outlet 3 and an oil inlet 5 are respectively provided outside the thrust washer mounting surface 2.

[0031] Such as Figure 2 - Figure 4As shown, an oil return passage 4 corresponding to the oil outlet 3 is installed inside the structural body 1, an oil inlet passage 6 corresponding to the oil inlet 5 is installed inside the structural body 1, an injector oil inlet hole 7 is provided at a position on the outer wall of the structural body 1 near the oil inlet 5, an injector oil return hole 8 is provided at a position on the outer wall of the structural body 1 near the other side. Oil pipes are installed inside both the injector oil inlet hole 7 and the injector oil return hole 8. The oil pipes can ensure a stable and consistent flow path of fuel from the fuel supply system to the injector oil inlet hole 7. The oil pipes can also play a buffering role to reduce the pressure fluctuation of the fuel during transmission. Bolts are hingedly connected to the front ends of both the injector oil inlet hole 7 and the injector oil return hole 8. The hingedly connected bolts make the connection between the injector and the oil inlet and return pipelines more convenient. During installation, only by rotating the bolts to the appropriate positions can quick connection be achieved, greatly saving the installation time. The injector oil inlet hole 7 is connected to the corresponding oil inlet passage 6, and the injector oil return hole 8 is connected to the corresponding oil return passage 4. The oil inlet passage 6 continuously supplies the required fuel to the injector. After connection, the fuel can smoothly and timely reach the injector, avoiding the situation of fuel supply interruption or insufficiency. The oil return passage 4 provides a return path for the excess fuel in the injector. After connection, the fuel pressure in the injector can be maintained within an appropriate range. When the injector injects fuel, the remaining fuel flows into the oil return passage 4 through the injector oil inlet hole 7 and returns to the fuel system. First bolt holes 9 and second bolt holes 10 are respectively installed on the outer wall of the structural body 1. Threaded bolts are rotatably connected inside both the first bolt hole 9 and the second bolt hole 10. The rotation operation of the threaded bolts is relatively simple and fast. The staff can easily screw the threaded bolts into the bolt holes by using tools such as wrenches to achieve the rapid assembly of components. A second mounting surface 11 is provided at the bottom of the structural body 1.

[0032] When the present utility model is in use, the staff installs the structural body 1 at a designated position, fixes the structural body 1 through the threaded bolts, and then connects various oil pipes into the corresponding holes. After the installation work is completed, the fuel will enter the oil inlet passage 6 through the oil inlet 5, and then enter the fuel injection pump through the pipeline. The fuel injection pump injects the fuel into the combustion chamber of the engine. And part of the fuel will flow back into the return oil pipe of the fuel injection pump after injection. The return oil pipe will send the excess fuel back to the fuel tank to keep the pressure of the fuel system stable.

[0033] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A fuel injection pump inlet and outlet oil pipe adapter structure, comprising a structural body (1), characterized in that: A thrust plate mounting surface (2) is provided on one side of the structural body (1), and an oil outlet (3) and an oil inlet (5) are respectively provided on the outer side of the thrust plate mounting surface (2); An oil return passage (4) corresponding to the oil outlet (3) is installed inside the structural body (1), and an oil inlet passage (6) corresponding to the oil inlet (5) is installed inside the structural body (1); The outer wall of the structural body (1) is provided with an injector oil inlet hole (7) near the oil inlet port (5), the outer wall of the structural body (1) is provided with an injector oil return hole (8) near the other side, the outer wall of the structural body (1) is respectively provided with a first bolt hole (9) and a second bolt hole (10), and the bottom of the structural body (1) is provided with a second mounting surface (11).

2. The fuel injection pump inlet and outlet oil pipe adapter structure according to claim 1, characterized in that: A thrust plate is installed on the outer side of the thrust plate installation surface (2).

3. The fuel injection pump inlet and outlet oil pipe adapter structure according to claim 2, characterized in that: A sealing block is installed on the outer side of the thrust plate.

4. The fuel injection pump inlet and outlet oil pipe adapter structure according to claim 1, characterized in that: Oil pipes are installed inside the oil inlet hole (7) and the oil return hole (8) of the oil injector.

5. The fuel injection pump inlet and outlet oil pipe adapter structure according to claim 4, characterized in that: The front ends of the fuel injector oil inlet hole (7) and the fuel injector oil return hole (8) are both hingedly connected with bolts.

6. The fuel injection pump inlet and outlet oil pipe adapter structure according to claim 4, characterized in that: The fuel injector oil inlet hole (7) is connected to the corresponding oil inlet passage (6), and the fuel injector oil return hole (8) is connected to the corresponding oil return passage (4).

7. The fuel injection pump inlet and outlet oil pipe adapter structure according to claim 1, characterized in that: Threaded bolts are rotatably connected inside the first bolt hole (9) and the second bolt hole (10).

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