JPH04105951U - Cylinder head cover mounting device - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to a mounting device for mounting a cylinder head cover on a cylinder head, and the present invention is a mounting device for mounting a cylinder head cover on a cylinder head, which allows easy management of tightening torque during mounting, and prevents oil leakage due to aging. The purpose is to provide equipment. [Structure] A stud bolt 7 attached to a cylinder head is inserted into a through hole 3 of a cylinder head cover 1, and a washer 11 is interposed and tightened with a nut 9. The washer 11 is made of a highly rigid material such as metal, and the washer 11 is in direct contact with the nut 9 and the cylinder head cover 1, and the space between the washer 11 and the wall surface of the recess 5 of the cylinder head cover 1 and the outer circumferential surface of the stud bolt 7 is O-rings 13, 15 are interposed between the two.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a cylinder that attaches the engine cylinder head cover to the cylinder head. This invention relates to a head cover mounting device.

0002

[Conventional technology]

Conventionally, a bolt hole was provided on the top surface of the cylinder head cover, and the bolt was inserted through this bolt hole. When connecting the cylinder head cover and cylinder head with bolts, use the bolts. In order to prevent oil from leaking from the gap between the hole and the bolt, a seal as shown in Figure 5 is installed. I used a washer.

0003 The seal washer 51 is made by bonding a sealing member 52 such as oil-resistant rubber and a metal washer 53. This seal washer 51 is installed between the nut and the top surface of the cylinder head cover. By intervening and tightening the bolt, the seal member 52 is connected to the top surface of the cylinder head and the bolt. The screw is pressed against the bolt shaft to seal the bolt hole. However, with this structure, all the bolt axial force is transferred to the cylinder head cover through the seal member. Since the load is transmitted to the top surface of the bar, a large load is applied to the sealing member due to long-term use. In some cases, the seal member may become sagging or deformed, leading to problems such as oil leakage. .

0004 In addition, the elasticity of the sealing material not only varies from product to product, but also varies depending on temperature and usage time. It is difficult to manage the tightening torque of bolts because the tightening torque varies depending on the Since there is a close relationship between bolt tightening torque and bolt tightening torque, it may be caused by insufficient tightening force. Seal damage may occur due to oil leakage or excessive tightening force.

[0005] In addition, in Japanese Utility Model Application Publication No. 57-198341, in order to solve this problem, A cylinder head cover mounting structure in which bolts are fastened is disclosed. This mounting structure has a seal member between the bolt hole and the shaft of the bolt 64, as shown in Figure 6. 67, and a spring material 68 is provided between the mounting nut 66 and the cylinder head cover 62. , so that the bolt axial force is transmitted to the cylinder head cover 62 via this spring material 68. It is characterized by what it did. By fastening the cylinder head 62 via the spring member 68, the seal No compressive load is applied to the seal member 67, and there is a problem of oil leakage due to the sealing material becoming sagging or deformed. The issue will be resolved.

[0006]

[Problem that the idea aims to solve]

However, as mentioned above, as a result of tightening the bolt through the spring member, the spring If the spring members become sagging, the tightening force of the cylinder head cover will decrease, causing damage to the cylinder. In some cases, oil leaked from around the head cover. In addition, since the bolt is tightened through an elastic body like before, the tightening torque is limited. Problems that are difficult to understand have not been resolved.

[0007] Furthermore, the component that was previously only a seal washer has been separated into a spring member and a seal member. As a result, work such as attaching the seal member to the cylinder head and the spring member was difficult. This meant that the number of assembly steps would also increase. In view of the above-mentioned problems, this invention enables direct tightening without using an elastic body, which is not possible with conventional methods. A cylinder that can prevent oil leakage due to the seal member becoming worn out or deformed. The object of the present invention is to provide a head mounting device.

[0008]

[Means to solve the problem]

According to the present invention, a through hole is provided on the top surface of the cylinder head cover, and the through hole is inserted into the through hole. A cylinder that fastens the cylinder head cover and cylinder head with bolts. In the head cover mounting device A rigid fastening member that transmits the axial force of the bolt member to the top surface of the cylinder, and the fastening portion. or the outer peripheral surface of the bolt member parallel to the bolt member axis and the cylinder head cover. a sealing member that seals between the wall surface of the bar penetration part, and the fastening member and the cylinder. A cylinder head cover mounting device characterized by direct contact with the top surface of the head. location is provided.

[0009]

[Effect]

The bolt axial force is transmitted through direct rigid contact between the fastening member and the top surface of the cylinder. Since there is no elastic body in the part, it is easy to manage the tightening torque and prevents the elastic body from sagging. There is no reduction in the tightening force of the cylinder head cover. Further, since no tightening force is applied to the sealing member, it is less likely to wear out or be damaged.

0010

【Example】

1 to 4 show an embodiment of the cylinder head cover mounting device of the present invention. In Fig. 1(a), 1 is a cylinder head cover, and 3 is a cylinder head cover. 1 through hole provided on the top surface, 5 formed around the through hole on the top surface of the cylinder head cover 7 is a stud bolt attached to the cylinder head (not shown); is a fastening nut that is screwed onto the stud bolt 7. In this embodiment, there is a highly rigid material such as metal between the nut 9 and the top surface of the cylinder head 1. A washer 11 made of a material is inserted.

[0011] In this embodiment, the outer circumferential surface of the bolt and the outer circumferential surface of the washer 11 are has grooves for installing O-rings 13 and 15, and O-rings 13 and 15 are installed respectively. It is supplied pre-assembled to the stud bolt 7 and washer 11. O-ring 13 and 15 are respectively shown with cylinder head cover 1 installed on the cylinder head. Stud bolt 7, inner circumferential surface of washer 11, outer circumferential surface of washer 11, and cylinder head cover. A seal is formed between the bar recess 5 and the wall surface.

0012 In this embodiment, the cylinder head cover 1 is installed using studs in the through hole 3 of the cover 1. Attach cover 1 so that bolt 7 is inserted through it, and attach washer 11 to stud bolt 7. This is done by attaching it and tightening the nut 9 from above. At this time, the load due to tightening of nut 9 is between nut 9, washer 11, and washer 11. and cylinder head cover 1, but these surfaces are in rigid contact. No elastic body is involved in the load transmission path. Therefore, the tightening torque can be easily managed.

[0013] Also, O-ring seals 13 and 15 are arranged between planes parallel to the bolt axis. Because of this, no tightening load is applied, and no wear or damage occurs due to tightening. Furthermore, since O-ring seals 13 and 15 are used, seals due to variations in shape may occur. Because there is little change in performance and stable sealing performance can be obtained regardless of the tightening load. , the tightening force changed over time due to loosening of the nut 9, elongation of the stud bolt 7, etc. No oil leakage occurs even in the case of Also, the O-rings 13 and 15 are attached to the stud bolt 7 and washer 11 in advance. Since the parts are supplied in the same state, the number of parts and assembly man-hours will not increase.

[0014] 1(b) and 1(c) show a modification of the embodiment of FIG. 1(a). In Figure 1(b) In this case, the mounting grooves for O-rings 13 and 15 are both provided in washer 11, The rings 13 and 15 are supplied attached to the washer 11. Also, Fig. 1(c) is similar to Fig. 1(b). ), the O-ring mounting groove is not provided in washer 11, and the cylinder head cover recess is 5 and the stud bolt 7. This makes handling of washer 11 easier. Although it has the advantage of being easy to use, it is not possible to obtain the same effect of the present invention as in Fig. 1(a). Wear.

[0015] 2(a) and 2(b) also show modified examples of FIG. 1(a). Figure 2(a) shows the nut 9 A structure using a nut 9' that integrates a washer 11 and a washer 11 is shown. This allows the part point The number can be reduced. In addition, Fig. 2(b) shows the stud bolt in Fig. 1(a). Instead of 7, the mounting bolt 7' is inserted from the cylinder head cover 1 side. show. In these examples, it is possible to obtain the same effect as in the embodiment shown in Fig. 1(a). Needless to say,

[0016] 3(a) to 3(c) show another embodiment of the present invention. As shown in Figure 3(a) In this embodiment, the wall surface of the bolt 7 through hole 3 of the cylinder head cover 1 is It is extended and forms a sealing surface 3'. Also, do not use washer 11 in Figure 1(a). First, sealing is performed only between this sealing surface 3' and the outer peripheral surface of the stud bolt 7, The O-ring 15 in FIG. 1(a) is not used. Also, the O-ring 13 is the seal It is supplied installed in a mounting groove provided on surface 3'. This results in Figure 1(a) This has the advantage of reducing the number of O-rings used. Figure 3(b) shows O-phosphorus. This is a modified example of FIG. 3(a) in which a mounting groove for the bolt 13 is provided on the stud bolt 7 side. This is it When inserting the stud bolt 7 into the through hole 3'', the O-ring may be damaged by the threaded part. The possibility of being affected is reduced. In addition, Fig. 3(c) shows the stud in Fig. 3(b). A configuration in which a mounting bolt 7' is inserted from the cover 1 side instead of bolt 7 is used. show. This eliminates the need for the nut 9, making it possible to reduce the number of parts. In these embodiments as well, the effects of the present invention are the same as in the embodiment shown in FIG.

[0017] FIG. 4 shows a third embodiment of the invention. In this example, the cylinder head cover The shape of the recessed part 5 of -1 is the same as that of the embodiment of FIG. 1, but the stud bolt 7 is replaced with Using the mounting bolt 7″ inserted from the cover 1 side, connect the bolt 7″ head to the one shown in Figure 1(a). It is characterized by being integrated with washer 11. Also, sealing is done only by the O-ring 15 inserted around the outer circumference of the bolt 7'' head. The O-ring 13 in FIG. 1(a) is not used. This makes it easier to install the cylinder head cover 1 using the mounting bolt 7'' and It is possible to simultaneously reduce the number of rings and the number of parts. Also, when installing the O-ring or inserting the bolt, make sure to attach the O-ring to the bolt thread. The possibility of damage can be eliminated.

[0018] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. However, various modifications can be made within the scope of the present invention.

[0019]

[Effect of the idea]

The cylinder head cover mounting device of the present invention is installed on the cylinder head cover as described above. When installing, make sure that the tightening load is received by the contact surface of the rigid body and that there is no elastic body interposed between them. In addition, by sealing between planes parallel to the bolt axis, Easily manages initial tightening torque and has the effect of preventing oil leakage due to changes over time. Demonstrate.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention and a modification thereof.

FIG. 2 is a sectional view showing a modification of the embodiment of FIG. 1;

FIG. 3 is a sectional view showing a second embodiment of the present invention and a modification thereof.

FIG. 4 is a sectional view showing a third embodiment of the present invention.

FIG. 5 is a diagram showing a conventional example of a cylinder head cover mounting device.

FIG. 6 is a diagram showing a conventional example of a cylinder head cover mounting device.

[Explanation of symbols]

1...Cylinder head cover 3...Through hole 5...Concave part 7...Stud bolt 7′, 7″…Bolt 9,9'...Nut 11...Washer 13, 15...O-ring

Claims (1)

[Scope of utility model registration request] 1. A cylinder head cover mounting device in which a through hole is provided in the top surface of a cylinder head cover, and the cylinder head cover and the cylinder head are fastened together by a bolt member inserted into the through hole, in which the axial force of the bolt member is transmitted to the top surface of the cylinder. a rigid fastening member, and a sealing member that seals between the outer circumferential surface of the fastening member or the bolt member parallel to the bolt member axis and the wall surface of the cylinder head cover penetration part, the fastening member and the top surface of the cylinder head. A cylinder head cover mounting device characterized by direct contact.