Piston cooling nozzle and engine

Abstract

The utility model discloses a piston cooling nozzle and an engine, and relates to the technical field of engine cooling, the piston cooling nozzle is arranged on an engine body, a main oil duct is arranged in the engine body and comprises a nozzle body, a nozzle pipe and a bolt, a through hole is formed in the nozzle body, and the bolt penetrates through the through hole and fixes the nozzle body on the engine body; the bolt comprises a bottom positioning section, a bolt middle part and a top threaded section, a branch oil duct is formed between the bolt middle part and the through hole and a gap between the bolt middle part and the engine body, and the branch oil duct is communicated with the main oil duct; a cooling oil cavity is formed in the nozzle body, and the nozzle pipe is communicated with the cooling oil cavity; one side of the bottom of the through hole communicates with the cooling oil cavity, and engine oil is sprayed to the bottom of the piston or an inner cooling oil channel of the piston through the main oil channel, the branch oil channels, the cooling oil cavity and the nozzle pipe in sequence.

Description

TECHNICAL FIELD

[0001] The utility model relates to engine cooling technical field, concretely relates to a piston cooling nozzle and engine. BACKGROUND

[0002] With the continuous strengthening of engine performance, the engine heat load is continuously increased, and the working temperature of the piston is continuously increased, and higher requirements are put forward to the cooling capacity of the piston. The overheating of the piston can cause serious faults such as throat cracking, internal cooling oil cavity carbon deposition, one ring groove carbon deposition and even cylinder pulling, therefore, sometimes the piston needs to be forcibly cooled.

[0003] The piston cooling nozzle is a device for spraying oil to the bottom of the piston or into the internal cooling oil channel of the piston at a certain pressure when the piston needs to be forcibly cooled. The commonly used piston cooling nozzle at present mostly uses a hollow bolt as an oil supply channel, and the structure is relatively complex, and the hollow bolt is higher in cost than the ordinary bolt, and the economy is poor. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies existing in the prior art, the utility model provides a piston cooling nozzle and engine, which uses an ordinary bolt, designs an oil channel between the bolt and the engine body, is simple in structure, does not need to use a hollow bolt, and is low in manufacturing cost.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A piston cooling nozzle is arranged on an engine body, the engine body is provided with a main oil channel, and the piston cooling nozzle comprises a nozzle body, a nozzle pipe and a bolt, a through hole is formed in the nozzle body, the bolt passes through the through hole and fixes the nozzle body on the engine body, the bolt comprises a bottom positioning section, a middle bolt and a top threaded section, a branch oil channel is formed between the middle bolt and the through hole and between the middle bolt and the engine body with a gap, and the branch oil channel is communicated with the main oil channel.

[0007] The nozzle body is internally provided with a cooling oil cavity, the nozzle pipe is communicated with the cooling oil cavity, one side of the bottom of the through hole is communicated with the cooling oil cavity, and oil is sprayed to the bottom of the piston or the internal cooling oil channel of the piston in sequence through the main oil channel, the branch oil channel, the cooling oil cavity and the nozzle pipe.

[0008] As a further implementation, the nozzle pipe axis of the one end of the nozzle pipe connected with the nozzle body is centered with the cooling oil cavity axis.

[0009] As a further implementation, the top threaded section is fixedly connected with the engine body, and the nozzle body is fixedly installed on the engine body.

[0010] As a further implementation, the nozzle body is fixed with a positioning pin on the side close to the engine body, the positioning pin is installed on the nozzle body for connecting with the engine body to determine the position of the nozzle body.

[0011] As a further implementation, the bottom positioning section is transitionally fitted with the through hole of the nozzle body.

[0012] As a further implementation, the bottom surface of the nozzle body is attached with a bolt positioning surface, and the positioning pin cooperates with the positioning surface to form a one-side two-pin positioning.

[0013] An engine comprising an engine body with a main oil passage, and a piston cooling nozzle as described in any of the above, the engine body is provided with a body bolt hole intersecting with the main oil passage.

[0014] The top threaded section of the bolt is fixedly connected with the body bolt hole, and the middle part of the bolt has a gap with the body bolt hole to form an upper branch oil passage.

[0015] As a further implementation, the body bolt hole comprises a threaded hole section at the upper end and a light hole section at the lower part, the threaded hole section is threadedly connected with the bolt, and the light hole section forms a branch oil passage with the middle part of the bolt.

[0016] As a further implementation, the main oil passage is circular in cross section.

[0017] As a further implementation, the piston cooling nozzle is connected with a piston through a nozzle pipe.

[0018] With the above technical solution, the piston cooling nozzle has the following beneficial effects:

[0019] The present application leaves a gap between the bolt and the engine body and between the bolt and the nozzle body to form a branch oil passage, the oil passage is designed between the bolt and the engine body, ordinary bolts can be used to replace hollow bolts to fasten the nozzle body and the engine body and to transport oil, which effectively reduces the procurement cost of parts and is beneficial to improving the economy of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application.

[0021] Figure 1 It is a whole schematic view of the embodiment of the present application;

[0022] Figure 2 It is a front view of the sectional view of the embodiment of the present application;

[0023] Figure 3 It is the installation profile schematic view of the embodiment of the utility model;

[0024] Figure 4 It is the installation schematic view of the embodiment of the utility model.

[0025] In the drawing: 01, engine body; 02, piston cooling nozzle; 03, piston;

[0026] 1, nozzle body; 11, through hole; 12, cooling oil cavity; 2, nozzle pipe; 3, bolt; 31, bottom positioning section; 32, top threaded section; 33, middle part of bolt; 4, positioning pin; 5, main oil passage; 6, engine body bolt hole; 61, threaded hole section; 62, light hole section; 7, branch oil passage. DETAILED DESCRIPTION

[0027] The utility model will be further described below in combination with the drawings and embodiments.

[0028] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the utility model. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as understood by ordinary skilled persons in the technical field to which the utility model belongs.

[0029] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, it means that the features, steps, operations, devices, components and / or their combinations are present.

[0030] Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled persons in the art without creative labor belong to the scope of protection of the utility model.

[0031] Embodiment one

[0032] In a typical embodiment of the present application, a piston cooling nozzle is provided, such as Figures 1-4As shown, a piston cooling nozzle 02 is mounted on an engine block 01. The engine block 01 contains a main oil passage 5. The piston cooling nozzle 02 includes a nozzle body 1, a nozzle tube 2, and a bolt 3. The nozzle body 1 has a through hole 11. The bolt 3 passes through the through hole 11 and fixes the nozzle body 1 to the engine block 01. The bolt 3 includes a bottom positioning section 31, a bolt middle section 33, and a top threaded section 32. Gap gaps are formed between the bolt middle section 33 and the through hole 11, and between the bolt middle section 33 and the engine block 01, respectively, forming branch oil passages 7. The branch oil passages 7 communicate with the main oil passage 5.

[0033] The nozzle body 1 has a cooling oil chamber 12 inside, and the nozzle tube 2 is connected to the cooling oil chamber 12; the bottom side of the through hole 11 is connected to the cooling oil chamber 12, and the engine oil is sprayed sequentially through the main oil passage 5, the branch oil passage 7, the cooling oil chamber 12 and the nozzle tube 2 to the bottom of the piston or the internal cooling oil passage of the piston.

[0034] Specifically, such as Figure 1 As shown, the piston cooling nozzle 02 in this embodiment consists of a nozzle body 1, a nozzle tube 2, a bolt 3, and a locating pin 4. The nozzle body 1 has a longitudinally penetrating through-hole 11. The bolt 3 passes vertically through the through-hole 11 from bottom to top and connects to the engine block 01, thereby securing the nozzle body to the engine block. The upper diameter of the through-hole 11 is larger than the lower diameter, creating a gap between the through-hole 11 and the bolt 3, allowing oil to flow through.

[0035] Combination Figure 2 As shown, a cooling oil chamber 12 is provided inside the nozzle body 1. The cooling oil chamber 12 is cylindrical and can communicate with and seal the nozzle tube 2. The other end of the cooling oil chamber 12 is connected to one side of the through hole 11. The engine oil flowing in from between the through hole and the bolt can be delivered to the piston through the cooling oil chamber and the nozzle tube to perform a cooling effect. Among them, the axis of the nozzle tube 2 connected to the nozzle body 1 is aligned with the axis of the cooling oil chamber to ensure the positioning accuracy of the nozzle tube and improve the oil injection efficiency.

[0036] Combination Figure 2 As shown, bolt 3 includes a bottom positioning section 31, a middle section 33, and a top threaded section 32. The bottom positioning section 31 is connected to the nozzle body 1, and there is a transition fit between the bottom positioning section 31 and the through hole 11 for positioning. The positioning surface of the bottom positioning section 31 is in contact with the bottom surface of the nozzle body 1 for surface positioning during nozzle body installation and fixing. At the same time, a positioning pin 4 is fixedly provided on the side of the nozzle body 1 near the engine block, which cooperates with the positioning surface of the nozzle body and bolt 3 to form a two-pin positioning on one side, effectively ensuring the installation accuracy of the nozzle body. In this embodiment, the positioning pin 4 is installed on the nozzle body 1 and connected to the engine block 01 to facilitate positioning of the nozzle body.

[0037] The top threaded section 32 of the bolt 3 is fixed to the engine body 01 by screwing.

[0038] Specifically, as shown in Figure 2 and Figure 3 The engine body 01 is provided with a main oil gallery 5, and a longitudinal engine bolt hole 6 is formed near the main oil gallery 5, and the engine bolt hole 6 intersects with the main oil gallery 5. In this embodiment, the outer diameter of the middle section 33 of the bolt is smaller than the inner diameter of the through hole 11, and there is a gap between the middle section 33 of the bolt and the through hole 11. The engine bolt hole 6 is divided into an upper threaded hole section 61 and a lower smooth hole section 62, the threaded hole section 61 is screwed with the top threaded section 32 of the bolt, and the inner diameter of the smooth hole section 62 is larger than that of the threaded hole section 61, so that a gap is formed between the smooth hole section 62 and the outer surface of the middle section 33 of the bolt for the oil to flow through. In this embodiment, the gaps between the middle section 33 of the bolt and the engine body 01 and between the middle section 33 of the bolt and the nozzle body 1 are communicated to form branch oil galleries 7. Since the top of the engine bolt hole intersects with the main oil gallery, the branch oil galleries are communicated with the main oil gallery. When the piston is forcibly cooled, the oil flows through the main oil gallery, the branch oil gallery, the cooling oil chamber, and the nozzle pipe to the bottom of the piston or the inner cooling oil gallery of the piston.

[0039] In this embodiment, a common bolt can be used, such as a hexagonal head bolt, an internal hexagonal bolt, etc.

[0040] In this embodiment, an engine is also provided, which comprises an engine body 01, a piston 03, and the above-mentioned piston cooling nozzle 02. The engine body 01 is provided with a main oil gallery 5, which is a circular channel in cross section. The piston 03 is arranged in the engine body, and the piston cooling nozzle 02 is fixedly installed on the engine body 01 by the bolt 3. The piston cooling nozzle 02 is connected with the piston 03 by the nozzle pipe 2, and is used to spray oil into the bottom of the piston or the inner cooling oil gallery to prevent the piston from overheating.

[0041] Specifically, as shown in Figure 3 and Figure 4 The engine body 01 is provided with a longitudinal engine bolt hole 6, and the top end of the engine bolt hole 6 intersects with the main oil gallery 5. The engine bolt hole 6 comprises an upper threaded hole section 61 and a lower smooth hole section 62. The inner diameter of the threaded hole section 61 is smaller than that of the smooth hole section 62, and the threaded hole section 61 can be connected and fixed with the top threaded section 32 of the bolt, while the smooth hole section 62 has a gap with the middle section 33 of the bolt to form an upper branch oil gallery for the oil to flow from the main oil gallery to the nozzle body. At the same time, there is a gap between the middle section 33 of the bolt and the through hole 11 in the nozzle body to form a lower branch oil gallery, which is communicated with the upper branch oil gallery and the cooling oil chamber respectively, so that the oil flowing out of the main oil gallery can enter the cooling oil chamber through the branch oil gallery, and be sprayed into the bottom of the piston or the inner cooling oil gallery of the piston through the nozzle pipe.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them, and those skilled in the art should understand that the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A piston cooling nozzle, disposed on an engine block, wherein the engine block is provided with a main oil passage, characterized in that, The system includes a nozzle body, a nozzle tube, and a bolt. The nozzle body has a through hole, and the bolt passes through the through hole to fix the nozzle body to the engine block. The bolt includes a bottom positioning section, a middle section, and a top threaded section. A branch oil passage is formed between the middle section of the bolt and the through hole, and between the middle section of the bolt and the engine block. The branch oil passage is connected to the main oil passage. The nozzle body has a cooling oil chamber inside, and the nozzle tube is connected to the cooling oil chamber; the bottom side of the through hole is connected to the cooling oil chamber.

2. A piston cooling nozzle as described in claim 1, characterized in that, The nozzle tube is connected to the nozzle body at one end. The axis of the nozzle tube is aligned with the axis of the cooling oil chamber.

3. A piston cooling nozzle as described in claim 1, characterized in that, The top threaded section is fixedly connected to the engine body, and the nozzle body is fixedly installed on the engine body.

4. A piston cooling nozzle as described in claim 1, characterized in that, A positioning pin is fixedly provided on the side of the nozzle body near the engine body. The positioning pin is installed on the nozzle body for connection with the engine body.

5. A piston cooling nozzle as described in claim 1, characterized in that, The bottom positioning section transitions into the through hole of the nozzle body.

6. A piston cooling nozzle as described in claim 4, characterized in that, The bottom surface of the nozzle body is in contact with the bolt positioning surface, and cooperates with the positioning pin to form a one-sided two-pin positioning.

7. An engine, comprising an engine block, wherein a main oil passage is provided within the engine block, characterized in that, It also includes a piston cooling nozzle as described in any one of claims 1-6, wherein a body bolt hole is provided in the engine body, and the body bolt hole intersects with the main oil passage; The top threaded section of the bolt is fixedly connected to the bolt hole of the machine body, and there is a gap between the middle part of the bolt and the bolt hole of the machine body to form the upper branch oil passage.

8. An engine as described in claim 7, characterized in that, The bolt hole of the machine body includes an upper threaded hole section and a lower smooth hole section. The threaded hole section is threadedly connected to the bolt, and a branch oil passage is formed between the smooth hole section and the middle of the bolt.

9. An engine as described in claim 7, characterized in that, The main oil passage has a circular cross-section.

10. An engine as described in claim 7, characterized in that, It also includes a piston, and the piston cooling nozzle is connected to the piston through a nozzle tube.

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