Split type diesel engine cylinder head

Abstract

The utility model relates to a cylinder cover, in particular to a split type diesel engine cylinder head. Comprising a cylinder head body and an air guide channel located on the cylinder head body, and the air guide channel comprises cooling fins and an air inducing plate. The cylinder head body, the cooling fins and the air inducing plate define a closed-loop cavity, and the closed-loop cavity is an air guiding channel. The cooling fins and the cylinder head body are of an integrated structure, and the air inducing plate is detachably and fixedly connected with the cooling fins. The radiating fins and the cylinder head are open cavities, so that a loam core is not needed during casting, and the cylinder head can be directly formed through mold casting. A closed loop formed by the cooling fins, the front end of the air inducing plate and the cylinder head body is an air inducing opening. According to the scheme, the split type diesel engine cylinder head has the advantages that the machining difficulty is reduced, the production process is simplified, and the production efficiency is greatly improved; and the fan cover can be matched with various fan covers.

Description

Technical Field

[0001] The utility model relates to a cylinder cover, in particular to a split type diesel engine cylinder head. Background Art

[0002] The cylinder head of a diesel engine, also known as the cylinder cover, is an important part of a diesel engine. Its function is to seal the upper part of the cylinder and together with the piston and the cylinder wall form a combustion chamber, forming a closed cylinder working space. The cylinder head of a diesel engine is usually formed by one-piece casting.

[0003] The air guide channel on the existing diesel engine cylinder head is a closed-loop cavity, such as Figure 1 As shown, a prepared mud core needs to be placed during casting to process the closed-loop cavity; after casting is completed, the mud core needs to be removed to obtain the required blank. It can be seen that casting the air guide channel requires making a mud core, installing the mud core, and then removing the mud core, resulting in more manufacturing processes for the diesel engine cylinder head and low production efficiency. Since the mud core is a disposable mold, a mud core is required for each closed-loop cavity cast, resulting in a high production cost for the diesel engine cylinder head. Since the air inlet of the air guide channel is connected to the fan cover outlet, the shape of the air inlet needs to match the shape of the fan cover outlet, so it cannot be adapted to more types of fan covers. Utility Model Content

[0004] The utility model aims to provide a split diesel engine cylinder head, which simplifies the casting process of the cylinder head and greatly reduces the manufacturing cost of the cylinder head.

[0005] The split diesel engine cylinder head in this scheme includes a cylinder head body and an air guide channel located on the cylinder head body, and the air guide channel includes a heat sink and an air duct plate. That is, the cylinder head body, the heat sink and the air duct plate together form a closed-loop cavity, and the closed-loop cavity is the air guide channel. The heat sink and the cylinder head body are an integrated structure, and the air duct plate and the heat sink are detachably fixedly connected. Since the heat sink and the cylinder head are open cavities at this time, no mud core is required during casting, and it can be formed directly through mold casting. The closed loop formed by the front end of the heat sink and the air duct plate and the cylinder head body is the air inlet. The air duct plate is preferably made of nylon, plastic and other materials with high strength, high heat resistance and certain flame retardancy.

[0006] The advantages of the utility model are: 1) Although the heat sink and the cylinder head body are an integrated structure, the heat sink and the cylinder head form an open cavity, and no mud core is required during casting, which not only simplifies the production process and greatly improves the production efficiency; it also reduces the production cost. 2) The air induction plate can be produced separately, reducing the difficulty of processing. 3) By matching different air induction plates, air inlets of different shapes are formed, which can be adapted to a variety of fan covers. 4) Since the air induction plate is made of lightweight materials such as nylon and plastic, the weight of the cylinder head itself can be reduced.

[0007] Furthermore, transverse limiting parts and vertical limiting parts are provided on both sides of the air guide plate; the transverse limiting parts abut against the outer side of the heat sink to prevent the air guide plate from moving horizontally. The vertical limiting parts abut against the side of the heat sink to limit the vertical movement of the air guide plate, so as to facilitate the coordinated installation of the air guide plate and the heat sink.

[0008] Furthermore, a limiting protrusion is provided at the front end of the air induction plate for limiting the installation of the fan cover.

[0009] Furthermore, one side of the air induction plate close to the front end is bent downward so as to make the air induction port adapt to the shape of the air outlet of the fan cover.

[0010] Furthermore, a guide portion is provided at the front end of the air inlet plate for guiding and limiting the position of the fan cover and the air inlet when the fan cover and the air inlet are installed.

[0011] Furthermore, a connecting portion is provided at the rear end of the air induced draft plate, and the connecting portion and the cylinder head body are detachably fixedly connected. Preferably, the two can be fixedly connected by connecting members such as bolts and limit pins; a reinforcing rib is provided between the connecting portion and the air induced draft plate.

[0012] Furthermore, the heat sink is a straight plate structure, and there are two heat sinks that are arranged opposite to each other, which is convenient for casting processing.

[0013] Furthermore, the heat sink is a U-shaped structure, and a closed loop formed by the port of the U-shaped structure, the front end of the air induction plate and the cylinder head body is an air inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an integrated diesel engine cylinder head in the prior art;

[0015] Figure 2 It is an exploded view of the split diesel engine cylinder head of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the split diesel engine cylinder head of the utility model;

[0017] Figure 4 This is a schematic diagram of the air inlet direction in the cylinder head of the split diesel engine of the utility model;

[0018] Figure 5 It is a schematic diagram of the installation of the cylinder head body and the air induction plate of the split diesel engine cylinder head of the utility model;

[0019] Figure 6 It is a top view of the air induction plate in the cylinder head of the split diesel engine of the utility model;

[0020] Figure 7 The utility model is a bottom view of the air induction plate in the cylinder head of the split diesel engine.

[0021] In the figure, 1 is a cylinder head body, 2 is a heat sink, 3 is an air induced draft plate, 4 is an air guide channel, 5 is an air induced port, 3-1 is a transverse limiting portion, 3-1a is a first transverse limiting portion, 3-1b is a second transverse limiting portion, 3-1c is a third transverse limiting portion, 3-2 is a vertical limiting portion, 3-3 is a limiting protrusion, 3-4 is a guide portion, 3-5 is a connecting portion, 3-6 is a reinforcing rib, 3-7 is a front end of the air induced draft plate, 3-8 is a rear end of the air induced draft plate, and 6 is a bolt. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0023] according to Figure 2 , Figure 3 , Figure 4 As shown, the split diesel engine cylinder head includes a cylinder head body 1 and an air guide channel 4 located on the cylinder head body 1, and the air guide channel 4 includes a heat sink 2 and an air guide plate 3. That is, the cylinder head body 1, the heat sink 2 and the air guide plate 3 enclose a closed-loop cavity, which is the air guide channel 4. The heat sink 2 and the cylinder head body 1 are an integral structure, and the air guide plate 3 is detachably fixedly connected to the heat sink 2. Since the heat sink 2 and the cylinder head are open cavities at this time, and since the opening area is much larger than the cross-section inside the cavity, no mud core is required during casting, and it can be directly formed by mold casting. It not only simplifies the production process, but also greatly improves the production efficiency. In order to ensure that the air guide plate 3 adapts to its use environment, the air guide plate 3 is preferably made of nylon, plastic and other materials with high strength, high heat resistance and certain flame retardancy. And the air guide plate 3 made of nylon and plastic is easy to process and shape, can be adapted to a variety of fan covers, and at the same time, can reduce the weight of the cylinder head itself. The air guide plate 3 can be fixedly connected to the cylinder head body 1 by bolts 6. The closed loop formed by the heat sink 2 and the front end 3-7 of the air induction plate and the cylinder head body 1 is the air induction port 5. When in use, air is Figure 4 In the direction of the middle dotted arrow, the air passes through the air inlet 5 and the air guide channel 4 in sequence and enters the cylinder head body 1.

[0024] As a further improvement of the utility model, both sides of the air guide plate 3 are provided with a lateral limit portion 3-1 and a vertical limit portion 3-2. When the air guide plate 3 is installed on the heat sink 2, the lateral limit portion 3-1 abuts against the outer side of the heat sink 2, and the vertical limit portion 3-2 abuts against the side of the heat sink 2. Preferably, as Figure 7 As shown, the air guide plate 3 is provided with a first transverse limit portion 3-1a on one side and a second transverse limit portion 3-1b and a third transverse limit portion 3-1c on the other side. When the air guide plate 3 is buckled onto the heat sink 2, the first transverse limit portion 3-1a, the second transverse limit portion 3-1b and the third transverse limit portion 3-1c form a triangular limit for the air guide plate 3. In this embodiment, as Figure 5As shown, the third transverse limiting portion 3 - 1 c is an arc-shaped portion adapted to the side shape of the heat sink 2 .

[0025] As a further improvement of the present invention, a limiting protrusion 3-3 is provided at the front end 3-7 of the air induction plate, and the front end of the air outlet of the fan cover abuts against the limiting protrusion 3-3. Figure 6 As shown, it plays a limiting role when the fan cover is installed. Preferably, the limiting protrusion 3-3 and the air induction plate 3 are integrally formed.

[0026] As a further improvement of the utility model, Figure 3 As shown, the side of the air induction plate 3 near the front end is bent downward so that the air induction port 5 can be adapted to the shape of the fan cover air outlet. Preferably, the shape and size of the front end of the air induction plate 3 can be processed and produced according to the shape and size of the connected fan cover air outlet. Only by changing the shape of the front end of the air induction plate 3, it can be adapted to various fan cover air outlets, thereby improving the applicability of the utility model.

[0027] As a further improvement of the present invention, the front end 3-7 of the air induction plate is provided with a guide portion 3-4, and the limiting protrusion 3-3 is located between the air induction plate 3 and the guide portion 3-4. When installing the fan cover, the guide portion 3-4 extends into the air outlet of the fan cover so that the inner wall of the air outlet of the fan cover abuts against the guide portion 3-4, and the fan cover slides along the guide portion 3-4 until it abuts against the limiting protrusion 3-3 on the air induction plate 3, which facilitates the installation and limiting of the fan cover.

[0028] As a further improvement of the utility model, the rear end 3-8 of the air induction plate is provided with a connecting portion 3-5, and the connecting portion 3-5 is detachably fixedly connected to the cylinder head body 1, preferably, connected by bolts 6, such as Figure 4 As shown, the bolt 6 passes through the connecting portion 3-5 and is threadedly connected to the cylinder head body 1. For ease of production and processing, the connecting portion 3-5 and the air induction plate 3 are an integrally formed structure. A reinforcing rib 3-6 is also provided between the connecting portion 3-5 and the air induction plate 3 to increase the strength between the connecting portion 3-5 and the air induction plate 3.

[0029] As a further improvement of the present invention, the heat sink 2 is a straight plate structure, there are two heat sinks 2 and they are arranged opposite to each other, the closed loop formed by the front end of the heat sink 2, the front end 3-7 of the air induction plate and the cylinder head body 1 is the air inlet 5; the rear end 3-8 of the air induction plate is against the cylinder head body 1.

[0030] As a further improvement of the present invention, the heat sink 2 is a U-shaped structure, and the heat sink 2 is located between the cylinder head body 1 and the air induction plate 3. The closed loop formed by the port of the U-shaped structure, the front end 3-7 of the air induction plate and the cylinder head body 1 is the air induction port 5. The rear end 3-8 of the air induction plate abuts against the bottom of the U-shaped structure.

[0031] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. Split diesel engine cylinder head, characterized by: The invention comprises a cylinder head body (1) and an air guide channel (4) located on the cylinder head body (1); the air guide channel (4) comprises a heat sink (2) and an air guide plate (3); the heat sink (2) and the cylinder head body (1) are an integral structure, and the air guide plate (3) and the heat sink (2) are detachably fixedly connected; a closed loop formed by the front ends of the heat sink (2) and the air guide plate (3) and the cylinder head body (1) is an air guide port (5).

2. The split diesel engine cylinder head according to claim 1, characterized in that: A transverse limiting portion (3-1) and a vertical limiting portion (3-2) are provided on both sides of the air induction plate (3); the transverse limiting portion (3-1) abuts against the outer side surface of the heat sink (2), and the vertical limiting portion (3-2) abuts against the side edge of the heat sink (2).

3. The split diesel engine cylinder head according to claim 1, characterized in that: A limiting protrusion (3-3) is provided at the front end of the air inducing plate (3).

4. The split diesel engine cylinder head according to claim 3, characterized in that: The side of the air induction plate (3) close to the front end is bent downward.

5. The split diesel engine cylinder head according to claim 4, characterized in that: A guide portion (3-4) is provided at the front end of the air induction plate (3).

6. The split diesel engine cylinder head according to claim 1, characterized in that: A connecting portion (3-5) is provided at the rear end of the air induction plate (3), and the air induction plate (3) is connected to the cylinder head body (1) via the connecting portion (3-5).

7. The split diesel engine cylinder head according to claim 1, characterized in that: The heat sink (2) is a straight plate structure, and there are two heat sinks (2) which are arranged opposite to each other.

8. The split diesel engine cylinder head according to claim 1, characterized in that: The heat sink (2) is a U-shaped structure, and a closed loop formed by the end of the U-shaped structure, the front end of the air induction plate (3) and the cylinder head body (1) is an air induction port (5).

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