Cylinder cover bolt with cooling water channel

Abstract

The utility model discloses a cylinder cover bolt with a cooling water channel, belongs to the technical field of cylinder cover bolts, and solves the problem that the bolt is difficult to detach due to the fact that a wrench can only be used for being contacted with the outer wall of a bolt head of an existing device and then screwing out the bolt, and if edges and corners of the outer surface of the bolt head are corroded, the bolt head cannot be rotated by the wrench. Comprising a bolt head and a bolt rod, a water channel through hole is formed in the middle of the bolt rod in a penetrating mode, a hexagonal groove is formed in the middle of the top face of the bolt head, a connecting hole communicated with a first thread is formed in the middle of the bottom face of the hexagonal groove, and an annular thread groove is formed in the top face of the bolt head; a connecting part is arranged at the top end of the bolt head; the bolt head can be prevented from being exposed in the air through the connecting pipe, and then the situation that the inner wall of the bolt head is corroded is avoided, so that an outer hexagonal wrench is conveniently inserted into the hexagonal groove to drive the bolt head to rotate, and the bolt is conveniently disassembled.

Description

Technical Field

[0001] This utility model relates to the field of cylinder head bolt technology, specifically to cylinder head bolts with cooling water channels. Background Technology

[0002] Cylinder head bolts with integrated cooling water channels are an innovative hollow-structure bolt design primarily used for optimizing the cooling systems of internal combustion engines such as diesel engines. After installation, the bolt's water channel holes connect with the engine block's cooling water channel holes, forming a complete cooling water circulation path. This directly reduces the bolt's own temperature, preventing thread deformation or preload loss caused by high temperatures. Secondary cooling of the cylinder head with cooling water significantly reduces the overall operating temperature of the diesel engine. This design upgrades traditional fasteners into functional cooling components, achieving refined improvements in engine thermal management.

[0003] A search revealed that patent application number 201520869339.5 discloses a cylinder head bolt with cooling water channels. From top to bottom, it is provided with a bolt head, a limiting shoulder, a connecting section, and a fastening thread section. A connecting screw hole is provided at the center of the bolt head, and a water channel through hole is provided at the lower end of the connecting screw hole. The water channel through hole is located at the center of the limiting shoulder, the connecting section, and the fastening thread section. The connecting screw hole and the water channel through hole are connected. The connecting screw hole and the water channel through hole constitute the cooling water channel of the cylinder head bolt. The outer diameter of the fastening thread section corresponds to the inner diameter of the cylinder head fixing screw hole on the engine block.

[0004] Although the cylinder head bolts with cooling water channels allow the coolant in the water tank to cool the cylinder head a second time through the four hollow cylinder bolts, which can further reduce the overall operating temperature of the diesel engine and improve its reliability, the cylinder head bolts with cooling water channels can only be unscrewed by contacting the outer wall of the bolt head with a wrench. If the edges of the outer surface of the bolt head are corroded, the wrench will not be able to rotate the bolt head, making it difficult to remove the bolt.

[0005] Therefore, we propose cylinder head bolts with cooling water channels. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a cylinder head bolt with cooling water channels, which solves the problem that existing devices can only use a wrench to contact the outer wall of the bolt head and then unscrew the bolt. If the edges of the outer surface of the bolt head are corroded, the wrench cannot rotate the bolt head, making the bolt difficult to remove.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a cylinder head bolt with cooling water channels, including a bolt head and a bolt shank, wherein the bolt head is fixedly installed in the middle of the bottom surface of the bolt head, the outer surface of the bottom end of the bolt shank is provided with a first thread matching the specification of the cylinder head fixing screw hole, and a water channel through hole is provided in the middle of the bolt shank.

[0008] The bolt head has a hexagonal groove in the middle of the top surface, a connecting hole communicating with the first thread in the middle of the bottom surface of the hexagonal groove, an annular thread groove in the top surface of the bolt head, the hexagonal groove being located in the inner circle of the annular thread groove, and a connecting component being provided at the top of the bolt head.

[0009] The connecting component includes a connecting pipe, the outer surface of the bottom end of the connecting pipe is provided with a second thread, the connecting pipe is threaded into the inside of the annular threaded groove through the second thread, and the inner wall of the top end of the connecting pipe is provided with a third thread for threaded connection with the cooling water pipe.

[0010] Preferably, an annular washer plate flush with the top of the second thread is fixedly fitted on the outer surface of the connecting pipe, and an annular sealing gasket is bonded to the bottom surface of the annular washer plate. After the bottom thread of the connecting pipe is fitted into the annular thread groove, the annular washer plate will squeeze the annular sealing gasket to contact the top surface of the bolt head, thereby increasing the sealing between the connecting pipe and the annular thread groove.

[0011] Preferably, a hexagonal plate is fixedly fitted on the outer surface of the top end of the connecting pipe. A wrench is used to contact the hexagonal plate and rotate it to facilitate the rotation of the connecting pipe, so as to facilitate the assembly or disassembly of the connecting pipe and the bolt head.

[0012] Preferably, a ring-shaped array of heat dissipation fins is fixedly installed on the middle of the outer surface of the connecting pipe. The heat dissipation fins are made of copper. The heat dissipation fins can dissipate heat from the connecting pipe, which helps to increase the service life of the connecting components.

[0013] This utility model provides cylinder head bolts with cooling water channels. It has the following beneficial effects:

[0014] 1. The cylinder head bolt with cooling water channel allows external cooling water to enter the connecting pipe, hexagonal groove, connecting hole, and water channel through hole in sequence, and finally enter the engine block's cooling water channel. During this process, the cooling water cools the bolt shank, bolt head, and connecting parts, which helps prevent deformation of the bolt shank, bolt head, and connecting parts due to overheating, and helps maintain a stable connection between the cylinder head and the engine block. The connecting pipe prevents the bolt head from being exposed to air, thus preventing corrosion of the inner wall of the bolt head. This allows for the use of an external hex wrench inserted into the hexagonal groove to rotate the bolt head, facilitating bolt removal. This solves the problem of existing devices that only allow the wrench to contact the outer wall of the bolt head to unscrew the bolt. If the edges of the bolt head's outer surface are corroded, the wrench cannot rotate the bolt head, making bolt removal difficult.

[0015] 2. The cylinder head bolt with cooling water channel is designed with a hexagonal plate to facilitate the use of a wrench to rotate the hexagonal plate and the connecting pipe. The bottom end of the connecting pipe is then threaded into the annular thread groove via a second thread. The annular sealing gasket increases the sealing between the connecting pipe and the annular thread groove, preventing coolant leakage. The heat dissipation fins increase the heat dissipation efficiency of the connecting pipe, which helps protect the connecting pipe and further prevents it from deforming due to overheating. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a side view of the structure of this utility model;

[0018] Figure 3 This is a cross-sectional view of the bolt head and bolt shank of this utility model;

[0019] Figure 4 This is a schematic diagram of the connecting component structure of this utility model.

[0020] In the diagram: 1. Bolt head; 11. Hexagonal groove; 12. Connecting hole; 13. Annular threaded groove; 2. Bolt shank; 21. First thread; 22. Water channel through hole; 3. Connecting component; 31. Connecting pipe; 32. Second thread; 33. Third thread; 34. Annular gasket; 35. Annular sealing gasket; 36. Hexagonal plate; 37. Heat dissipation fins. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1: As Figure 1-4 As shown: The device includes a bolt head 1 and a bolt shank 2. The bolt head 1 is fixedly installed in the middle of its bottom surface. The outer surface of the bottom end of the bolt shank 2 has a first thread 21 that matches the specifications of the cylinder head fixing screw hole. A water passage hole 22 is formed through the middle of the bolt shank 2. A hexagonal groove 11 is formed in the middle of the top surface of the bolt head 1. A connecting hole 12, which communicates with the first thread 21, is formed in the middle of the bottom surface of the hexagonal groove 11. An annular threaded groove 13 is formed on the top surface of the bolt head 1, with the hexagonal groove 11 located within the inner circle of the annular threaded groove 13. A connecting component 3 is provided at the top of the bolt head 1. The connecting component 3 includes a connecting pipe 31. The outer surface of the bottom end of the connecting pipe 31 has a second thread 32, and the connecting pipe 31 is threaded into the annular threaded groove 13 through the second thread 32. Inside, the inner wall of the top end of the connecting pipe 31 is provided with a third thread 33 for threaded connection with the cooling water pipe. External cooling water enters the interior of the connecting pipe 31, the hexagonal groove 11, the connecting hole 12 and the water passage 22 in sequence, and finally enters the cooling water channel of the engine body. During this process, the cooling water cools down the bolt rod 2, the bolt head 1 and the connecting component 3, which helps to prevent the bolt rod 2, the bolt head 1 and the connecting component 3 from deforming due to overheating, and helps to maintain a stable connection between the cylinder head and the engine body. The connecting pipe 31 can prevent the bolt head 1 from being exposed to the air, thereby preventing the inner wall of the bolt head 1 from being corroded. It is also convenient to use an external hex wrench to insert into the interior of the hexagonal groove 11 to rotate the bolt head 1, so as to disassemble the bolt.

[0023] Example 2: As Figure 1 , 2As shown in Figure 4: An annular gasket 34, flush with the top of the second thread 32, is fixedly fitted on the outer surface of the connecting pipe 31. An annular sealing gasket 35 is bonded to the bottom surface of the annular gasket 34. A hexagonal plate 36 is fixedly fitted on the outer surface of the top of the connecting pipe 31. A heat dissipation fin 37, arranged in an annular array, is fixedly installed in the middle of the outer surface of the connecting pipe 31. The heat dissipation fin 37 is made of copper. The hexagonal plate 36 is designed to facilitate the rotation of the hexagonal plate 36 and the connecting pipe 31 using a wrench. The bottom end of the connecting pipe 31 is then threaded into the annular threaded groove 13 through the second thread 32. The annular sealing gasket 35 increases the sealing between the connecting pipe 31 and the annular threaded groove 13, preventing coolant leakage. The heat dissipation fin 37 increases the heat dissipation efficiency of the connecting pipe 31, which is beneficial for protecting the connecting pipe 31 and further preventing the connecting pipe 31 from deforming due to overheating.

[0024] The working principle and usage process of this utility model: When using this cylinder head bolt with cooling water channel, the cylinder head is connected to the engine body through the bolt rod 2, and the end of the bolt rod 2 away from the bolt head 1 extends into the cooling water channel inside the engine body, so that the water channel through hole 22 is connected to the cooling water channel. Then, the connecting pipe 31 is threaded into the inside of the annular thread groove 13 through the second thread 32. Then, the connecting pipe 31 is threaded to the external cooling water pipe through the third thread 33. Then, the external cooling water enters the interior of the connecting pipe 31, the hexagonal groove 11, the connecting hole 12 and the water channel through hole 22 in sequence, and finally enters the cooling water channel of the engine body. During this process, the cooling water cools down the bolt rod 2, the bolt head 1 and the connecting parts 3.

[0025] When it is necessary to remove the bolt, if the outer edge of the bolt head 1 is corroded, the connecting pipe 31 can be separated from the cooling water pipe. Then, use an external hex wrench to pass through the connecting pipe 31 and extend it into the interior of the hexagonal groove 11, thereby rotating the bolt head 1 to remove the bolt.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cylinder head bolt with cooling water channel, comprising a bolt head (1) and a bolt shank (2), wherein the bolt head (1) is fixedly installed in the middle of the bottom surface of the bolt head (1), and the outer surface of the bottom end of the bolt shank (2) is provided with a first thread (21) matching the specification of the cylinder head fixing bolt hole, and a water channel through hole (22) is provided in the middle of the bolt shank (2). Its features are: The bolt head (1) has a hexagonal groove (11) in the middle of the top surface, a connecting hole (12) communicating with the first thread (21) in the middle of the bottom surface of the hexagonal groove (11), an annular thread groove (13) in the top surface of the bolt head (1), the hexagonal groove (11) being located in the inner circle of the annular thread groove (13), and a connecting component (3) being provided at the top of the bolt head (1). The connecting component (3) includes a connecting pipe (31), the outer surface of the bottom end of the connecting pipe (31) is provided with a second thread (32), the connecting pipe (31) is threaded into the inside of the annular threaded groove (13) through the second thread (32), and the inner wall of the top end of the connecting pipe (31) is provided with a third thread (33) for threaded connection with the cooling water pipe.

2. The cylinder head bolt with cooling water channels according to claim 1, characterized in that: The outer surface of the connecting pipe (31) is fixedly fitted with an annular gasket (34) that is flush with the top of the second thread (32), and an annular sealing gasket (35) is bonded to the bottom surface of the annular gasket (34).

3. The cylinder head bolt with cooling water channels according to claim 1, characterized in that: A hexagonal plate (36) is fixedly fitted on the outer surface of the top end of the connecting pipe (31).

4. The cylinder head bolt with cooling water channels according to claim 1, characterized in that: The connecting pipe (31) has heat dissipation fins (37) arranged in a ring array fixedly installed in the middle of its outer surface. The heat dissipation fins (37) are made of copper.

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