High-strength slender cylinder cover bolt

Abstract

The utility model belongs to the technical field of cylinder body machining, and particularly relates to a high-strength slender cylinder cover bolt, which is characterized in that a galvanized nut of a first screw and a galvanized nut of a second screw can penetrate along the upper side and the lower side of a cylinder cover, and a bolt gasket is sleeved on the opposite sides of the cylinder cover and a galvanized steel cover, so that fastening is enhanced; the connecting inner screw rod of the second screw rod can be fully screwed into the thread groove after being in contact with the first screw rod, so that the extrusion force of the cylinder barrel on the vertical section is reduced, and the service life of the cylinder body is prolonged; during the process, the accurate grinding guide flat keys can push the wedge-shaped clamping blocks on the two sides, the smoke inclined surfaces of the wedge-shaped clamping blocks inwards extrude the damping rod, the piston end of the damping rod is pressed and contracts inwards, at the moment, the limiting spring is pressed and deformed, and the damping rod is pressed and deformed; and through the elastic characteristic of the spring, the damping rod is quickly recovered, so that the shaking amplitude of the splicing type long bolt is reduced, and the service life of the product is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of cylinder body processing, and in particular relates to a high-strength slender cylinder head bolt. Background Art

[0002] The cylinder head is installed on the cylinder block. It is often in contact with high-temperature and high-pressure fuel gas, so it bears a large thermal and mechanical load. The cooling water hole on the lower end of the cylinder head is connected to the cooling water hole of the cylinder block. In order to fix the cylinder head, cylinder head bolts are usually used. Traditional cylinder head bolts cannot be well limited and are prone to safety hazards. The engine often vibrates violently during use, and the vibration can cause the connection of the cylinder head bolts to easily fall off due to vibration. After installation, the traditional shallow bolts will cause a very irregular deformation of the cylinder barrel on the vertical section, thereby reducing the service life of the cylinder block.

[0003] Therefore, high-strength slender cylinder head bolts are designed to solve the above problems. Utility Model Content

[0004] To solve the problems raised in the above background technology. The utility model provides a high-strength slender cylinder head bolt. This product is set as a slender bolt, which is spliced ​​by a first screw and a second screw, so as to replace the installation and use of shallow bolts. During use, the galvanized nut of the first screw and the galvanized nut of the second screw can be inserted along the upper and lower sides of the cylinder head, and the bolt gasket can be put on the opposite sides of the cylinder head and the galvanized steel cover to strengthen the fastening. During the tightening process, the connecting inner screw of the second screw can be fully screwed into the inside of the thread groove after contacting the first screw, thereby completing the splicing and installation of the slender bolt, reducing the extrusion force of the cylinder barrel on the vertical section, and enhancing the service life of the cylinder body.

[0005] During the use of this product, the shaking of the cylinder head will cause frequent friction between the screw and the inner thread of the cylinder. In order to reduce the internal shaking amplitude, after the first screw and the second screw of this product are installed, the finely ground guide keys on the inner side will be fully embedded in the keyway, thereby ensuring the overall strength after splicing. In this process, the finely ground guide keys can push the wedge-shaped blocks on both sides, and the flue gas inclined surface of the wedge-shaped block squeezes the damping rod inward, and the piston end of the damping rod is compressed and contracts inward. At this time, the limit spring is compressed and deformed, and the elastic characteristics of the spring make the damping rod recover quickly, thereby reducing the shaking amplitude of the spliced ​​long bolt and improving the service life of this product.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-strength slender cylinder head bolt, comprising a spliced ​​long bolt, the spliced ​​long bolt comprising a galvanized nut, a first screw, a second screw, a bolt washer and a connecting inner screw, the galvanized nut is respectively fixedly connected to the outside of the first screw and the second screw, the bolt washer is sleeved on one side of the first screw and the second screw, and the connecting inner screw is fixedly connected to the inside of the second screw.

[0007] As a preferred embodiment of the high-strength slender cylinder head bolt of the utility model, a precision-ground guide flat key is welded and fixed to the outer side of the connecting inner screw rod.

[0008] As a preferred embodiment of the high-strength slender cylinder head bolt of the utility model, a thread groove matching the size of the connecting inner screw rod is also provided inside the first screw rod.

[0009] As a preferred embodiment of the high-strength slender cylinder head bolt of the utility model, a key groove matching the size of the precision-ground guide flat key is further provided at the inner middle portion of the first screw rod close to the thread groove.

[0010] As a preferred embodiment of the high-strength slender cylinder head bolt of the utility model, a wedge-shaped block, a damping rod and a limit spring are also provided on the outer side of the keyway, the outer side of the damping rod is fixedly connected to the opposite side of the wedge-shaped block, and the two sides of the limit spring are respectively fixedly connected to the wedge-shaped block and the opposite side surfaces of the first screw rod.

[0011] As a preferred embodiment of the high-strength slender cylinder head bolt of the utility model, the wedge-shaped clamping blocks are provided in four groups, and the four groups of the wedge-shaped clamping blocks are arranged in an annular array on the outside of the keyway.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. In the utility model, the product is configured as a slender bolt, which is spliced ​​by a first screw and a second screw, thereby replacing the installation and use of shallow bolts. During use, the galvanized nut of the first screw and the galvanized nut of the second screw can be inserted along the upper and lower sides of the cylinder cover, and the bolt gasket can be sleeved on the opposite sides of the cylinder cover and the galvanized steel cover to strengthen the fastening. During the tightening process, the connecting inner screw of the second screw can be fully screwed into the inside of the thread groove after contacting the first screw, thereby completing the splicing and installation of the slender bolt, reducing the extrusion force of the cylinder barrel on the vertical section, and enhancing the service life of the cylinder body.

[0014] 2. In the utility model, during splicing, the finely ground guide flat key on the inside will be fully embedded in the keyway, thereby ensuring the overall strength after splicing. During this process, the finely ground guide flat key can push the wedge-shaped blocks on both sides, and the smoke inclined surface of the wedge-shaped block squeezes the damping rod inward, and the piston end of the damping rod is compressed and contracts inward. At this time, the limit spring is compressed and deformed, and the elastic properties of the spring make the damping rod quickly recover, thereby reducing the shaking amplitude of the spliced ​​long bolt and improving the service life of this product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the outer side of the first screw in the utility model;

[0018] Figure 3 It is a front view of the keyway in the utility model;

[0019] Figure 4 This is a splicing effect diagram of the spliced ​​long bolts in the utility model;

[0020] Figure 5 It is the distribution diagram of the damping rod in the utility model;

[0021] In the figure:

[0022] 1. Spliced ​​long bolts; 11. Galvanized nut; 12. First screw; 13. Second screw; 14. Bolt gasket; 15. Connecting inner screw; 2. Finely ground guide flat key; 3. Thread groove; 4. Keyway; 5. Wedge block; 6. Damping rod; 7. Limit spring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1 As shown:

[0025] High-strength slender cylinder head bolts. Traditional cylinder head bolts cannot be well limited, which may cause safety hazards. The engine often vibrates violently during use, which may cause the connection of the cylinder head bolts to fall off easily due to vibration. After installation, traditional shallow bolts will cause a very irregular deformation of the cylinder barrel on the vertical section, thereby reducing the service life of the cylinder body. On this basis, spliced ​​long bolts 1 are added.

[0026] like Figure 1 , Figure 2 and Figure 4 As shown:

[0027] In an optional embodiment: the spliced ​​long bolt 1 includes a galvanized nut 11, a first screw rod 12, a second screw rod 13, a bolt washer 14 and a connecting inner screw rod 15, the galvanized nut 11 is fixedly connected to the outer sides of the first screw rod 12 and the second screw rod 13 respectively, the bolt washer 14 is sleeved on one side of the first screw rod 12 and the second screw rod 13, the connecting inner screw rod 15 is fixedly connected to the inner side of the second screw rod 13, the interior of the first screw rod 12 is also provided with a thread groove 3 matched with the size of the connecting inner screw rod 15, and the outer side of the connecting inner screw rod 15 is welded and fixed with a finely ground guide flat key 2.

[0028] In this embodiment: this product is configured as a slender bolt, which is spliced ​​by a first screw rod 12 and a second screw rod 13, thereby replacing the installation and use of shallow bolts. During use, the galvanized nut 11 of the first screw rod 12 and the galvanized nut 11 of the second screw rod 13 can be inserted along the upper and lower sides of the cylinder cover, and the bolt gasket 14 can be sleeved on the opposite sides of the cylinder cover and the galvanized steel cover to strengthen the fastening. During the tightening process, the connecting inner screw rod 15 of the second screw rod 13 can be fully screwed into the inside of the thread groove 3 after contacting the first screw rod 12, thereby completing the splicing and installation of the slender bolt, reducing the extrusion force of the cylinder barrel on the vertical section, and enhancing the service life of the cylinder body.

[0029] More specifically:

[0030] like Figure 2 , Figure 3 and Figure 5 As shown:

[0031] In an optional embodiment: a keyway 4 matching the size of the fine-ground guide flat key 2 is also provided in the middle of the inner side of the first screw rod 12 near the thread groove 3, and a wedge-shaped block 5, a damping rod 6 and a limit spring 7 are also provided on the outer side of the keyway 4. The outer side of the damping rod 6 is fixedly connected to the opposite side of the wedge-shaped block 5, and the two sides of the limit spring 7 are respectively fixedly connected to the opposite side surfaces of the wedge-shaped block 5 and the first screw rod 12. Four groups of wedge-shaped blocks 5 are provided, and the four groups of wedge-shaped blocks 5 are arranged in a circular array on the outer side of the keyway 4.

[0032] In this embodiment: since the shaking of the cylinder cover will cause frequent friction between the screw and the inner thread of the cylinder, in order to reduce the internal shaking amplitude, after the first screw 12 and the second screw 13 of this product are installed, the finely ground guide flat key 2 on the inner side will be fully embedded in the keyway 4, thereby ensuring the overall strength after splicing. In this process, the finely ground guide flat key 2 can push the wedge-shaped blocks 5 on both sides, and the flue gas inclined surface of the wedge-shaped block 5 squeezes the damping rod 6 inward, and the piston end of the damping rod 6 is compressed and contracts inward. At this time, the limit spring 7 is compressed and deformed, and the elastic properties of the spring make the damping rod 6 recover quickly, thereby reducing the shaking amplitude of the spliced ​​long bolt 1 and improving the service life of this product.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high-strength, slender cylinder head bolt, comprising a spliced ​​long bolt (1), characterized in that: The spliced ​​long bolt (1) comprises a galvanized nut (11), a first screw rod (12), a second screw rod (13), a bolt washer (14) and a connecting inner screw rod (15); the galvanized nut (11) is fixedly connected to the outer sides of the first screw rod (12) and the second screw rod (13), respectively; the bolt washer (14) is sleeved on one side of the first screw rod (12) and the second screw rod (13); and the connecting inner screw rod (15) is fixedly connected to the inner side of the second screw rod (13).

2. The high-strength slender cylinder head bolt according to claim 1, characterized in that: A precision-ground guide flat key (2) is welded and fixed to the outer side of the connecting inner screw rod (15).

3. The high-strength slender cylinder head bolt according to claim 2, characterized in that: The first screw rod (12) is also provided with a thread groove (3) matching the size of the connecting inner screw rod (15).

4. The high-strength slender cylinder head bolt according to claim 3, characterized in that: A keyway (4) matching the size of the precision-ground guide flat key (2) is also provided at the inner middle portion of the first screw rod (12) close to the thread groove (3).

5. The high-strength slender cylinder head bolt according to claim 4, characterized in that: A wedge-shaped block (5), a damping rod (6) and a limit spring (7) are also provided on the outer side of the key slot (4); the outer side of the damping rod (6) is fixedly connected to the opposite side of the wedge-shaped block (5), and the two sides of the limit spring (7) are respectively fixedly connected to the opposite side surfaces of the wedge-shaped block (5) and the first screw rod (12).

6. The high-strength slender cylinder head bolt according to claim 5, characterized in that: Four groups of the wedge-shaped clamping blocks (5) are provided, and the four groups of the wedge-shaped clamping blocks (5) are arranged in an annular array on the outside of the keyway (4).

Images