Piston cooling nozzle assembly

Abstract

The utility model discloses a piston cooling nozzle assembly which comprises a nozzle body and an inner sleeve, a guide nail is arranged in the inner sleeve, a spring is nested on the periphery of the lower end of the guide nail, a steel ball is arranged at the lower end of the spring and seals an oil inlet at the lower end of the inner sleeve, and a connector is arranged at the oil inlet. An inner screw hole is formed above the limiting step; an inner hole is formed in the nozzle body, a spray pipe is connected to the outer side of the nozzle body, one end of the inner hole is communicated with the opening of the inner sleeve, and the other end of the inner hole is communicated with the spray pipe; an outer sleeve is nested on the periphery of the lower end of the inner sleeve, and the upper end of the outer sleeve is clamped and embedded between the nozzle body and the inner sleeve. The inner sleeve is arranged in the nozzle body, the spring and the steel ball are installed in the inner sleeve through the guide nail, a channel can be opened to form jet cooling when cooling oil is pumped out, the steel ball can be driven by the spring to close the oil inlet when oil pumping is stopped, and therefore the one-way pumping effect is achieved, and backflow can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts assemblies, and particularly relates to a piston cooling nozzle assembly. Background Art

[0002] The piston cooling nozzle of an automobile engine is a common device for spraying engine oil to cool the piston body. The piston cooling nozzle has a relatively high working pressure and high requirements for service life. For example, in the prior art, Chinese Patent CN2023207318363 discloses a piston cooling nozzle. The piston cooling nozzle is connected to the body of an external engine, and the piston cooling nozzle faces the piston oil inlet of the piston in the engine. On one side of the piston cooling nozzle facing the piston oil inlet, there are a first through hole and a second through hole arranged in parallel. The liquid spraying pressure of the first through hole is greater than that of the second through hole, and the liquid spraying pressure of the second through hole is less than the liquid supply pressure of the piston cooling nozzle.

[0003] The piston cooling nozzle disclosed in the above patent relies on an oil pump to pump out the cooling oil and then spray it through the nozzle. This piston cooling nozzle does not involve a structure to prevent backflow, and it may cause the coolant to flow back to the oil pump or the fuel tank during non - continuous operation. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a piston cooling nozzle assembly that can prevent the backflow of coolant.

[0005] To achieve the above purpose, in an embodiment of the utility model, a piston cooling nozzle assembly is provided, which includes a nozzle body and an inner sleeve fixed in the nozzle body. A guide pin is arranged in the inner sleeve. The guide pin has a T - shaped structure. A spring is nested on the outer periphery of the lower end of the guide pin, and a steel ball is arranged at the lower end of the spring. The steel ball closes the oil inlet at the lower end of the inner sleeve, and a joint is arranged at the oil inlet.

[0006] Inside the upper end of the inner sleeve, there is a limit step. The upper end of the guide pin is fixed on the limit step of the inner sleeve, and there is an internal thread hole above the limit step.

[0007] The inside of the nozzle body has an inner hole. A spray pipe is connected to the outside of the nozzle body. One end of the inner hole communicates with the opening of the inner sleeve, and the other end of the inner hole communicates with the spray pipe. The outer periphery of the lower end of the inner sleeve is nested with an outer sleeve, and the upper end of the outer sleeve is clamped between the nozzle body and the inner sleeve.

[0008] Preferably, the part of the steel ball in contact with the oil inlet is an arc surface, and the radian of the arc surface corresponds to the steel ball.

[0009] In summary, the utility model has the following advantages:

[0010] 1. The utility model is provided with an inner sleeve inside the nozzle body. A spring and a steel ball are installed in the inner sleeve through a guide pin. When the cooling oil pump pumps out, the channel can be opened to form jet cooling. When the oil pumping stops, the steel ball can be driven by the spring to seal the oil inlet, so as to achieve the effect of one-way oil pumping and prevent backflow.

[0011] 2. In order to install the guide pin in the nozzle body and achieve sealing, the guide pin of the utility model has a T-shaped structure. At the same time, in cooperation with the outer sleeve, the inner sleeve is fixed in the nozzle body by the way of embedding and extrusion fitting for sealing, so as to realize the installation, fixation and sealing between the inner sleeve and the nozzle body. Description of the Drawings

[0012] Figure 1 is a perspective view of a piston cooling nozzle assembly in an embodiment of the utility model;

[0013] Figure 2 is a perspective view of a piston cooling nozzle assembly in an embodiment of the utility model;

[0014] Figure 3 is a cross-sectional view of a piston cooling nozzle assembly in an embodiment of the utility model.

[0015] Wherein, 1. Nozzle body; 2. Inner sleeve; 3. Guide pin; 4. Spring; 5. Steel ball; 6. Connector; 7. Limit step; 8. Internal thread hole; 9. Inner hole; 10. Spray pipe; 11. Outer sleeve; 12. Arc surface. Detailed Embodiment

[0016] The utility model provides a piston cooling nozzle assembly, which includes a nozzle body 1 and an inner sleeve 2 fixed in the nozzle body 1. A channel is opened inside the nozzle body 1, and the lower end of the inner sleeve 2 passes through this channel. A guide pin 3 is arranged inside the inner sleeve 2, and the guide pin 3 has a T-shaped structure. A spring 4 is nested on the outer periphery of the lower end of the guide pin 3, a steel ball 5 is arranged at the lower end of the spring 4, the steel ball 5 seals the oil inlet at the lower end of the inner sleeve 2, and a connector 6 is arranged at the oil inlet. There is a limit step 7 inside the upper end of the inner sleeve 2, and the upper end of the guide pin 3 is fixed on the limit step 7 of the inner sleeve 2. During assembly, first place the steel ball 5, then put the spring 4 on the guide pin 3, and then insert the guide pin 3 into the inner sleeve 2. The upper end of the guide pin 3 forms an interference fit with the inner wall of the limit step 7, so that the two are closely connected and can also prevent leakage. At the same time, the limit step 7 can also limit the depth of the guide pin 3 inserted downward, and the length of the guide pin 3 is lower than the length of the spring 4.

[0017] Above the limit step 7 of the inner sleeve 2, there is an internal thread hole 8, which is beneficial to using a tool with an internal thread hole 8 to turn the inner sleeve 2, enabling it to apply downward force more easily to embed the inner sleeve 2 onto the nozzle body 1. The nozzle body 1 has an inner hole inside, and a nozzle tube 10 is connected to the outside of the nozzle body 1. One end of the inner hole 9 communicates with the opening of the inner sleeve 2, and the other end of the inner hole communicates with the nozzle tube. The outer periphery of the lower end of the inner sleeve 2 is nested with an outer sleeve 11, and the upper end of the outer sleeve is clamped between the nozzle body 1 and the inner sleeve 2. After the inner sleeve 2 is assembled, the opening of the inner sleeve 2 is just aligned with the inner hole, which is convenient for the coolant to flow through; the tip of the nozzle tube has a small injection port, and the small injection port can form a nozzle. After the inner sleeve 2 is embedded into the nozzle body 1, then the outer sleeve is sleeved from bottom to top, and the upper end of the outer sleeve is embedded into the gap between the inner sleeve 2 and the nozzle body 1. After the gap between the inner sleeve 2 and the nozzle body 1 is filled, the inner sleeve 2 and the nozzle body 1 are connected into one body under the extrusion force. After the gap between the two is filled, not only a tight connection is achieved, but also leakage can be avoided.

[0018] A joint 6 is provided at the oil inlet, and the joint 6 can be connected to the pipeline of the oil pump. When cooling oil enters for cooling, the cooling oil pushes open the steel ball 5 under the pressure of the oil pump. At this time, the spring 4 is further compressed and stores energy. The cooling oil enters the generation inner hole from the gap and then sprays out from the nozzle tube.

[0019] Preferably, in the present utility model, the part of the steel ball 5 in contact with the oil inlet is an arc surface 12, and the radian of the arc surface corresponds to the steel ball 5, which can make the contact surface between the steel ball 5 and the oil inlet larger, resulting in a better sealing effect.

[0020] Although the specific implementation manner of the present utility model has been described in detail in conjunction with the accompanying drawings, it should not be construed as a limitation on the protection scope of this patent. Within the scope described in the claims, various modifications and deformations that can be made by those skilled in the art without creative labor still fall within the protection scope of this patent.

Claims

1. A piston cooling nozzle assembly, characterized in that: It includes a nozzle body and an inner sleeve fixed in the nozzle body, a guide pin is arranged in the inner sleeve, the guide pin is in a T-shaped structure, a spring is nested on the outer periphery of the lower end of the guide pin, a steel ball is arranged at the lower end of the spring, the steel ball seals the oil inlet at the lower end of the inner sleeve, and a joint is arranged at the oil inlet; The upper end of the inner sleeve is provided with a limiting step inside, the upper end of the guide nail is fixed on the limiting step of the inner sleeve, and the upper part of the limiting step is provided with an inner screw hole; The nozzle body has an inner hole inside, and a nozzle is connected to the outside of the nozzle body. One end of the inner hole is connected to the opening of the inner sleeve, and the other end of the inner hole is connected to the nozzle. An outer sleeve is nested on the outer periphery of the lower end of the inner sleeve, and the upper end of the outer sleeve is embedded between the nozzle body and the inner sleeve.

2. The piston cooling nozzle assembly according to claim 1, characterized in that: The portion of the steel ball that contacts the oil inlet is an arc-shaped surface, and the curvature of the arc-shaped surface corresponds to that of the steel ball.

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