Oil injection device of diesel engine

Abstract

The utility model relates to an oil injection device of a diesel engine, which comprises a diesel guide rail and an oil injection nozzle, the diesel guide rail is connected with an oil inlet pipe, the end part of the oil inlet pipe is provided with a connecting sleeve, the upper end of the oil injection nozzle is provided with a connecting pipe, the outer diameter of the connecting pipe is matched with the inner diameter of the connecting sleeve, and the outer surface of the connecting pipe is provided with an internal thread bushing. An external thread is arranged on the outer surface of the connecting sleeve, the internal thread sleeve is matched with the external thread, and a self-locking mechanism is arranged on the outer side of the internal thread sleeve. The connecting pipe and the connecting sleeve can be tightly connected together in the mode that the inner threaded sleeve is in threaded connection with the outer surface of the connecting sleeve, and the situation that threaded connection is loosened due to vibration generated by the diesel engine can be prevented in cooperation with the arrangement of the self-locking mechanism, so that the connecting stability of the connecting pipe and the connecting sleeve can be improved, and the service life of the diesel engine is prolonged. The situation that the connecting position is loosened and oil leaks due to vibration generated when the diesel engine is used is avoided, and normal operation of the diesel engine is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel injectors, and particularly to an injection device for a diesel engine. Background Art

[0002] A diesel engine is an internal combustion engine that uses diesel as fuel. By compressing air, its temperature is raised to the self-ignition point, thereby igniting the diesel and generating power. Diesel engines are widely used in fields such as automobiles, trucks, ships, and generators due to their high efficiency and durability. Due to their strong structure and fuel economy, diesel engines are particularly popular in situations that require high power and high load.

[0003] Currently, the fuel injectors of diesel engines are usually installed on the diesel rail by means of buckles, and the firmness is poor. Because the diesel engine will vibrate during use, after long-term use, the fuel injector is likely to become loose, and then oil leakage will occur, affecting the normal operation of the diesel engine. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an injection device for a diesel engine that is convenient for disassembly and assembly and has strong stability.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows.

[0006] An injection device for a diesel engine includes a diesel rail and a fuel injector. An oil inlet pipe is connected to the diesel rail, a connecting sleeve is installed at the end of the oil inlet pipe, a connecting pipe is installed at the upper end of the fuel injector, and the outer diameter of the connecting pipe is adapted to the inner diameter of the connecting sleeve. An internal thread sleeve is installed on the outer surface of the connecting pipe, an external thread is provided on the outer surface of the connecting sleeve, the internal thread sleeve is adapted to the external thread, and a self-locking mechanism is arranged outside the internal thread sleeve.

[0007] Thus, through the threaded connection between the internal thread sleeve and the outer surface of the connecting sleeve, the connecting pipe and the connecting sleeve can be tightly connected together. And with the setting of the self-locking mechanism, it can prevent the loosening of the threaded connection caused by the vibration of the diesel engine, so the stability of the connection between the connecting pipe and the connecting sleeve can be improved, avoiding oil leakage and ensuring the normal operation of the diesel engine.

[0008] Further, the self-locking mechanism includes a ratchet installed on the outer surface of the internal thread sleeve, a mounting plate is installed on the outer surface of the diesel rail, a telescopic rod is installed on the outer surface of the mounting plate, a pawl is installed at the end of the telescopic rod, and a spring is sleeved on the outer surface of the telescopic rod. The two ends of the spring are respectively abutted against the mounting plate and the pawl.

[0009] The telescopic rod connects the pawl and the mounting plate. Through the arrangement of the spring, the pawl has elasticity. Therefore, when the internal thread sleeve rotates, through the cooperation of the pawl and the ratchet wheel, the pawl can be driven to contract outward, so that the internal thread sleeve can be smoothly tightened on the outer surface of the connecting sleeve, and the pawl can provide anti-reverse rotation ability for the ratchet wheel, thus achieving the purpose of self-locking.

[0010] Furthermore, two telescopic rods are installed on the outer surface of the mounting plate, and the two telescopic rods are distributed in the vertical direction, and the ends of the two telescopic rods are both connected to the pawl.

[0011] Through the arrangement of the two telescopic rods, the connection strength between the mounting plate and the pawl can be improved, providing sufficient supporting force for the pawl to block the reverse rotation of the ratchet wheel.

[0012] Furthermore, a pull rod is connected to the outer surface of the pawl, and the pull rod is arranged between the two telescopic rods. The end of the pull rod penetrates to the outside of the mounting plate and is equipped with a finger ring.

[0013] Through the arrangement of the pull rod and the finger ring, when the finger ring is pulled outward, the pawl can be driven to separate from the ratchet wheel, so that the connecting pipe can be removed from the connecting sleeve, facilitating the maintenance and cleaning of the fuel injector.

[0014] Furthermore, a sealing gasket is arranged inside the connecting sleeve.

[0015] Through the arrangement of the sealing gasket, the sealing performance of the connection between the connecting pipe and the connecting sleeve can be further improved, avoiding oil leakage.

[0016] Furthermore, two semi-circular heat preservation sleeves are arranged on the outer surface of the fuel inlet pipe, and heating wires are arranged inside the semi-circular heat preservation sleeves.

[0017] When the temperature is low, the fuel inlet pipe can be heated through the heating wires, thereby increasing the temperature of the diesel entering the fuel injector. Since the viscosity of diesel increases at low temperatures and the atomization effect during spraying is poor, after heating it, the effective atomization of diesel can be ensured at low temperatures, guaranteeing the normal operation of the diesel engine.

[0018] Furthermore, both sides of the two semi-circular heat preservation sleeves are connected by bolts.

[0019] Through the connection method of bolts, it is convenient to remove the semi-circular heat preservation sleeve from the fuel inlet pipe for maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0021] Figure 2 is Figure 1 the enlarged schematic diagram of A in

[0022] Figure 3 This is a schematic diagram of the partial structure of the present utility model.

[0023] Figure 4 This is a schematic diagram of the structure of the semi-circular heat preservation sleeve in the present utility model.

[0024] In the figure: 100, diesel fuel rail; 101, fuel inlet pipe; 102, connecting sleeve; 103, fuel injector nozzle; 104, connecting pipe; 105, internal thread sleeve; 200, self-locking mechanism; 201, ratchet wheel; 202, mounting plate; 203, telescopic rod; 204, pawl; 205, spring; 300, pull rod; 301, finger ring; 400, gasket; 500, semi-circular heat preservation sleeve; 501, heating wire; 600, bolt. Specific embodiments

[0025] The present utility model will be described in detail below with reference to the accompanying drawings.

[0026] As Figures 1-4 shown, an injection device for a diesel engine includes a diesel fuel rail 100 and a fuel injector nozzle 103. A fuel inlet pipe 101 is connected to the diesel fuel rail 100. A connecting sleeve 102 is installed at the end of the fuel inlet pipe 101. A connecting pipe 104 is installed at the upper end of the fuel injector nozzle 103. The outer diameter of the connecting pipe 104 is adapted to the inner diameter of the connecting sleeve 102. An internal thread sleeve 105 is installed on the outer surface of the connecting pipe 104. An external thread is provided on the outer surface of the connecting sleeve 102. The internal thread sleeve 105 is adapted to the external thread. A self-locking mechanism 200 is provided outside the internal thread sleeve 105.

[0027] When installing the fuel injector nozzle 103 on the diesel fuel rail 100, insert the connecting pipe 104 into the connecting sleeve 102, and then rotate the fuel injector nozzle 103. By means of the threaded connection between the internal thread sleeve 105 and the outer surface of the connecting sleeve 102, the connecting pipe 104 and the connecting sleeve 102 can be tightly connected together. With the setting of the self-locking mechanism 200, it can prevent the loosening of the threaded connection caused by the vibration of the diesel engine. Therefore, the stability of the connection between the connecting pipe 104 and the connecting sleeve 102 can be improved, and the occurrence of oil leakage can be avoided, ensuring the normal operation of the diesel engine.

[0028] Specifically, the self-locking mechanism 200 includes a ratchet wheel 201 mounted on the outer surface of the internal-thread sleeve 105. An installation plate 202 is mounted on the outer surface of the diesel fuel rail 100. A telescopic rod 203 is mounted on the outer surface of the installation plate 202. A ratchet pawl 204 is mounted at the end of the telescopic rod 203. A spring 205 is sleeved on the outer surface of the telescopic rod 203. The two ends of the spring 205 are respectively in contact with the installation plate 202 and the ratchet pawl 204. The telescopic rod 203 connects the ratchet pawl 204 and the installation plate 202. Through the arrangement of the spring 205, the ratchet pawl 204 has elasticity. Therefore, when the internal-thread sleeve 105 rotates, through the cooperation of the ratchet pawl 204 and the ratchet wheel 201, the ratchet pawl 204 can be driven to contract outward, so that the internal-thread sleeve 105 can be successfully tightened on the outer surface of the connection sleeve 102, and the ratchet pawl 204 can provide the ratchet wheel 201 with the ability to prevent reverse rotation, thus achieving the purpose of self-locking.

[0029] Specifically, two telescopic rods 203 are mounted on the outer surface of the installation plate 202, and the two telescopic rods 203 are distributed in the vertical direction. The ends of the two telescopic rods 203 are both connected to the ratchet pawl 204. Through the arrangement of the two telescopic rods 203, the connection strength between the installation plate 202 and the ratchet pawl 204 can be improved, providing sufficient supporting force for the ratchet pawl 204 to block the reverse rotation of the ratchet wheel 201.

[0030] Specifically, a pull rod 300 is connected to the outer surface of the ratchet pawl 204, and the pull rod 300 is arranged between the two telescopic rods 203. The end of the pull rod 300 penetrates to the outside of the installation plate 202 and is mounted with a finger ring 301. Through the arrangement of the pull rod 300 and the finger ring 301, when the finger ring 301 is pulled outward, the ratchet pawl 204 can be driven to separate from the ratchet wheel 201, so that the connecting pipe 104 can be removed from the connection sleeve 102, facilitating the maintenance and cleaning of the fuel injector 103.

[0031] Specifically, a sealing gasket 400 is arranged inside the connection sleeve 102. Through the arrangement of the sealing gasket 400, the sealing performance of the connection between the connecting pipe 104 and the connection sleeve 102 can be further improved, avoiding oil leakage.

[0032] Specifically, two semi-circular heat insulation sleeves 500 are arranged on the outer surface of the fuel inlet pipe 101. A heating wire 501 is arranged inside the semi-circular heat insulation sleeve 500. When the temperature is low, the fuel inlet pipe 101 can be heated by the heating wire 501, thereby increasing the temperature of the diesel fuel entering the fuel injector 103. Since the viscosity of diesel fuel increases at low temperatures and the atomization effect during spraying is poor, after heating it, the effective atomization of diesel fuel can be ensured at low temperatures, ensuring the normal operation of the diesel engine.

[0033] Specifically, both sides of the two semi-circular heat insulation sleeves 500 are connected by bolts 600. The connection method of the bolts 600 facilitates the removal of the semi-circular heat insulation sleeves 500 from the oil inlet pipe 101 for maintenance and replacement.

[0034] The above is a detailed description of the present utility model in combination with specific embodiments. It cannot be determined that the specific implementation manners of the present invention are only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present invention, several equivalent substitutions or obvious modifications are made, and the performance or use is the same, and all should be regarded as belonging to the patent protection scope determined by the claims submitted by the present utility model.

Claims

1. An injection device for a diesel engine, comprising a diesel fuel rail (100) and an injector (103), characterized in that: An inlet pipe (101) is connected to the diesel fuel rail (100), a connecting sleeve (102) is installed at the end of the inlet pipe (101), a connecting pipe (104) is installed at the upper end of the injector (103), and the outer diameter of the connecting pipe (104) is adapted to the inner diameter of the connecting sleeve (102). An internal thread sleeve (105) is installed on the outer surface of the connecting pipe (104), an external thread is provided on the outer surface of the connecting sleeve (102), the internal thread sleeve (105) is adapted to the external thread, and a self-locking mechanism (200) is arranged outside the internal thread sleeve (105).

2. The injection device for a diesel engine according to claim 1, characterized in that: The self-locking mechanism (200) includes a ratchet wheel (201) installed on the outer surface of the internal thread sleeve (105), a mounting plate (202) is installed on the outer surface of the diesel fuel rail (100), a telescopic rod (203) is installed on the outer surface of the mounting plate (202), a pawl (204) is installed at the end of the telescopic rod (203), a spring (205) is sleeved on the outer surface of the telescopic rod (203), and both ends of the spring (205) are respectively abutted against the mounting plate (202) and the pawl (204).

3. The injection device for a diesel engine according to claim 2, characterized in that: Two telescopic rods (203) are installed on the outer surface of the mounting plate (202), and the two telescopic rods (203) are distributed in the vertical direction, and the ends of the two telescopic rods (203) are both connected to the pawl (204).

4. The injection device for a diesel engine according to claim 3, characterized in that: A pull rod (300) is connected to the outer surface of the pawl (204), and the pull rod (300) is arranged between the two telescopic rods (203). The end of the pull rod (300) penetrates to the outside of the mounting plate (202) and a finger ring (301) is installed.

5. The injection device for a diesel engine according to claim 4, characterized in that: A sealing gasket (400) is arranged inside the connecting sleeve (102).

6. The injection device for a diesel engine according to claim 1, characterized in that: Two semi-circular heat preservation sleeves (500) are arranged on the outer surface of the inlet pipe (101), and a heating wire (501) is arranged inside the semi-circular heat preservation sleeve (500).

7. The injection device for a diesel engine according to claim 6, characterized in that: Both sides of the two semi-circular heat preservation sleeves (500) are connected by bolts (600).

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