CN2823642Y - Jointing assembly for jointing engine cylinder head and cylinder head cover - Google Patents

Abstract

The utility model is used for connecting the cylinder head of the engine and the cylinder head cover. The connection assembly includes a rod, a limiter, an elastic gasket and a thrust member. The rod is provided with threads, and the limiter is fixedly sleeved on the outer wall of the rod. On the outer wall of the rod part, the elastic gasket is looped, and the thrust piece is integrally arranged with the rod part. radially protrudes, the elastic washer is located between the thrust piece and the limiting piece, the thread is located below the thrust piece and extends from the end of the rod to the thrust piece. Through the setting of the thrust piece and the elastic gasket, the screw thread stops when the thrust piece touches the cylinder head, so that the elastic gasket has a better elastic deformation, thereby effectively reducing the vibration of the cylinder head cover and the engine vibration radiation.

Description

Connecting kit for connecting engine cylinder head and cylinder head cover

【Technical field】

The utility model relates to a connecting assembly used for connecting a cylinder head cover and a cylinder head.

【Background technique】

Please refer to Figure 1, the existing engine cylinder head cover and the cylinder head are generally connected by a bolt assembly, the bolt assembly includes a bolt 1, a gasket assembly 2 and a sleeve 3, and the bolt 1 passes through the sleeve 3 to secure the cylinder head The cover 4 is connected to the cylinder head 5, and the flange surface of the bolt 1 is pressed against the gasket assembly 2. When the lower end surface of the sleeve 3 touches the cylinder head 5, the bolt 1 cannot be further tightened, so that the gasket assembly 2 has A certain amount of compression reduces the vibration radiation of the engine. But this kind of design has the following disadvantages: 1) the bolt 1, the gasket assembly 2, and the sleeve 3 are scattered parts respectively, resulting in an increase in the entire engine parts, which is difficult to manage and increases the cost; 2) the cylinder head cover 4 and the cylinder head 5 is not easy to adjust the degree of tightness of the installation, resulting in poorer effect of reducing radiation noise.

【Content of utility model】

The purpose of the utility model is to provide a connecting assembly for connecting the engine cylinder head and the cylinder head cover, which can effectively reduce the vibration radiation of the cylinder head cover and facilitate installation.

The purpose of this utility model is achieved in this way: the connection assembly used to connect the engine cylinder head and the cylinder head cover includes a rod, a spacer, an elastic gasket and a thrust piece. The piece is fixedly sleeved on the outer wall of the rod, the elastic gasket is looped on the outer wall of the rod, the thrust piece is integrally arranged with the rod, the thrust piece is located below the limit piece, and the thrust piece Protrudes from the outer wall of the rod along the radial direction of the rod, the elastic washer is located between the thrust piece and the limit piece, the thread is located below the thrust piece and extends from the end of the rod to the thrust pieces.

The axial section of the thrust member is trapezoidal, square or triangular.

A first gasket looped on the outer wall of the rod part is also provided between the elastic gasket and the limiting member, and the first gasket covers the elastic gasket.

The rod part is the rod part of the six-faced flange bolt, the limiting member is the flange of the bolt, and the elastic gasket is located between the flange surface and the thrust member.

The rod part is the rod part of a double-ended stud, and the stopper is a nut and a washer that are matched with the thread at one end of the double-ended stud, and the elastic washer is located between the washer and the thrust member.

Compared with the prior art, the utility model has the following advantages: 1) Through the setting of the thrust piece and the elastic gasket, the screw thread stops when the thrust piece touches the cylinder head, so that the elastic gasket has better elastic deformation Therefore, it can effectively reduce the vibration of the cylinder head cover and reduce the vibration radiation of the engine; 2) Since the elastic gasket is integrated between the limit piece and the thrust piece, it is only necessary to tighten the bolts to the position of the thrust piece during installation. To achieve its best working condition, the connection assembly is easy to install and prevents human errors during installation. At the same time, since the entire connection assembly cannot be disassembled, the number of engine parts is reduced, the cost is reduced, and management is also convenient.

【Description of drawings】

Fig. 1 is a structural view of a prior art bolt assembly connecting a cylinder head cover and a cylinder head.

Fig. 2 is a structural diagram of the connection assembly of the present invention.

Fig. 3 is a structural diagram when connecting the cylinder head cover and the cylinder head with the connecting assembly of the present invention.

【Detailed ways】

Please refer to FIG. 2 and FIG. 3 , the connection assembly 10 used for connecting the engine cylinder head 12 and the cylinder head cover 11 of the present invention includes a rod portion 14 , a stopper 6 , gasket assemblies 7 , 8 and a thrust member 9 . The rod part 14 is provided with thread 16, and the thread 16 is used to be screwed into the threaded hole provided on the cylinder head 12. The stopper 6 is fixedly sleeved on the outer wall of the rod part 14, and the gasket assembly 7, 8 is looped on the On the outer wall of the rod portion 14, the thrust member 9 is integrally arranged with the rod portion 14, which is located below the stopper 6, and protrudes from the outer wall of the rod portion 14 along the radial direction of the rod portion 14, and the gasket The components 7 and 8 are located between the thrust piece 9 and the limit piece 6, and the side of the thrust piece 9 facing the thread 16 is provided with a thrust surface, and the thread 16 is located below the thrust surface and extends from the stem 14 The end extends to the thrust face. In this embodiment, the connecting assembly includes six-sided flange bolts, gasket assemblies 7 , 8 and thrust bosses 9 . The thrust boss 9 integrally extends outwards from the outer wall of the bolt shank 14, the shank is the shank 14 of the six-sided flange bolt, the limiting member 6 is the flange 6 of the bolt, and the thrust member Be this thrust boss 9. The washer assembly includes a first washer 7 and a second washer 8 , the first washer is made of metal, which is roughly bowl-shaped, and includes a base 71 and an extension 72 bent downward from the periphery of the base 71 . The second gasket 8 is made of elastic rubber material, and the extension portion 72 of the first gasket 7 covers the second gasket 8 . Since the first and second gaskets 7 and 8 are integrated between the flange surface of the bolt and the thrust boss, they are not easy to take out, so that the bolt, the thrust boss and the gasket assembly form an integral assembly.

During assembly, a cylinder head cover gasket 13 is provided between the mounting surface of the cylinder head cover 11 and the cylinder head 12, and the rod portion 14 of the bolt passes through the cylinder head cover 11 and is screwed into the cylinder head 12. When the bolt is tightened to the thrust convex When the platform 9, the bolt can not continue to be tightened down, at this moment, the second rubber gasket 8 is compressed and deformed and presses the upper surface of the cylinder head cover 11. During the assembly process, the degree of compression of the second gasket 8 must be moderate, so that the cylinder head cover gasket 13 is neither too loose nor too tight. If it is too loose, it will cause oil leakage, and if it is too tight, the noise reduction effect will be deteriorated. . Due to the effect of the thrust boss 9, the tightness of the cylinder head cover gasket 13 is moderate, effectively blocking the vibration transmitted from the body, preventing noise from leaking from the periphery, and reducing the engine noise caused by the accessories to a minimum. In this embodiment, the degree of tightness of the cylinder head cover gasket 13 is directly determined by the compression amount of the second rubber gasket, while the compression amount of the second rubber gasket 8 is determined by the flange surface of the bolt and the stopper during design. The distance between the push bosses 9 and the size of the metal first gasket 7 and the rubber second gasket 8 are determined. In addition, since the compression amount of the second rubber gasket 8 has been taken into consideration during design, it is only necessary to tighten the cylinder head cover bolt 14 to the position where the thrust boss 9 bears against the cylinder head 12 when installing the cylinder head cover bolt 14. At this moment, the second rubber gasket 8 reaches the design compression, and is in the best working condition. Since the bowl-shaped first gasket 7 buckles the rubber second gasket 8, it can prevent the second gasket 8 from being deformed laterally when it is compressed, and ensure that the second gasket 8 has sufficient elasticity in the direction of the bolt 14 shank. achieve the best working results. In this embodiment, the compression amount of the rubber gasket and the degree of tightness of the cylinder head cover gasket 13 can be adjusted by adjusting the relevant dimensions of the cylinder head cover vibration isolation connection assembly.

In this embodiment, the axial section of the thrust boss 9 can be not only trapezoidal, but also any other shape, including rectangular, triangular and so on. Simultaneously, the position of the thrust boss 9 can also be adjusted according to the distance between the cylinder head cover 11 and the mounting surface of the cylinder head 12 and the compression amount of the second rubber gasket 8 required during design, so that the bolt can be tightened When reaching the thrust boss 9, the second rubber gasket 8 reaches the optimal compression amount, produces a suitable elastic force, and controls the installation tightness of the parts, so as to achieve the best vibration isolation and oil sealing effect.

Claims (5)

1. connection part that is used to connect engine cylinder cap and valve mechanism cover, comprise bar portion, bounding means and resilient pad, bar portion is provided with screw thread, bounding means is solidly set on the outer wall of this bar portion, the resilient pad kink is on the outer wall of this bar portion, it is characterized in that: also comprise the thrust piece that is wholely set with bar portion, this thrust piece is positioned at the below of this bounding means, and this thrust piece is the radially protrusion along bar portion from the outer wall of this bar portion, resilient pad is between this thrust piece and bounding means, and screw thread is positioned at the below of this thrust piece and extends to this thrust piece from the end of this bar portion.

2. the connection part that is used to connect engine cylinder cap and valve mechanism cover as claimed in claim 1 is characterized in that: the axial cross section of described thrust piece is trapezoidal, square or triangle.

3. the connection part that is used to connect engine cylinder cap and valve mechanism cover as claimed in claim 1 is characterized in that: also be provided with first pad of kink on bar portion outer wall between described resilient pad and the bounding means, this first pad covers this resilient pad.

4. as any described connection part that is used to connect engine cylinder cap and valve mechanism cover among the claim 1-3, it is characterized in that: described bar portion is the bar portion of six flange bolts, bounding means is the flange of this bolt, and resilient pad is between flanged surface and thrust piece.

5. as any described connection part that is used to connect engine cylinder cap and valve mechanism cover among the claim 1-3, it is characterized in that: described bar portion is the bar portion of stud, bounding means is the nuts and washers with the screw-thread fit of this stud one end, and resilient pad is between this packing ring and thrust piece.

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