Full-suspension type housing assembly provided with spring bolts

Abstract

The utility model relates to a full suspension type housing assembly provided with a spring bolt, which belongs to the technical field of engines and comprises a cylinder head housing arranged on a cylinder head and a bolt penetrating through the cylinder head housing and connected with the cylinder head, and the upper section and the lower section of the bolt are respectively sleeved with a spring and a cylinder head housing sealing ring. Gaps are reserved between the cylinder head housing and the cylinder head and between the top of the bolt and the cylinder head housing, the upper end and the lower end of the cylinder head housing sealing ring abut against the cylinder head housing and the cylinder head respectively, and the upper end and the lower end of the spring in a compressed state abut against the top of the bolt and the cylinder head housing respectively. The vibration isolation and noise reduction time limit and reliability of the housing are improved.

Description

Technical Field

[0001] This utility model belongs to the field of engine technology, and in particular relates to a fully suspended housing assembly equipped with spring bolts. Background Technology

[0002] With increasingly stringent environmental regulations and continuous advancements in engine technology, engine design demands higher and higher levels of noise control. As a crucial component of the engine, the cylinder head cover, housing the high-speed valve train, becomes a key pathway for noise transmission and radiation. Vibrations and noise generated by the valve train during high-speed operation are directly transmitted to the external environment through the cylinder head cover, thus affecting the overall noise level of the engine. Therefore, vibration isolation and noise reduction technology for the cylinder head cover is particularly important in modern engine design.

[0003] To effectively reduce the transmission of noise from the valve train, existing technologies typically employ semi-floating or fully floating cylinder head cover designs, combined with damping bolts to achieve vibration isolation and noise reduction. However, most damping bolts are currently made of rubber, a material with numerous limitations in practical applications. Rubber materials are prone to surface hardening, cracking, and permanent deformation during long-term use, especially at high temperatures where aging and creep are more pronounced, leading to a gradual decrease in resilience. This not only significantly reduces the noise reduction effect of the engine after a period of use but may also cause insufficient bolt tightening force, leading to cylinder head cover seal failure and potential safety hazards such as liquid or gas leaks.

[0004] Furthermore, the single-material properties of existing rubber vibration damping bolts are insufficient to meet the high requirements of modern engines for vibration isolation and noise reduction performance. The elastic modulus and damping characteristics of rubber materials vary significantly under different operating conditions, making it difficult to achieve stable vibration isolation effects. Simultaneously, the durability and reliability of rubber materials are insufficient, making it difficult to adapt to the long-term, high-intensity operation requirements of engines. Existing technologies still have many shortcomings in the field of vibration isolation and noise reduction for cylinder head covers, urgently requiring a new design that can effectively improve the duration and reliability of vibration isolation and noise reduction. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a fully suspended housing assembly equipped with spring bolts to improve the timeliness and reliability of the housing's vibration isolation and noise reduction.

[0006] To achieve the above objectives, the present invention provides a fully suspended housing assembly with a spring bolt, comprising a cylinder head cover mounted on the cylinder head and a bolt passing through the cylinder head cover and connected to the cylinder head. The upper and lower sections of the bolt are respectively fitted with a spring and a cylinder head cover sealing ring. Gaps are left between the cylinder head cover and the cylinder head, and between the top of the bolt and the cylinder head cover. The upper and lower ends of the cylinder head cover sealing ring abut against the cylinder head cover and the cylinder head, respectively. In the compressed state, the upper and lower ends of the spring abut against the top of the bolt and the cylinder head cover, respectively.

[0007] Preferably, the bolt has a cylindrical boss in the middle, and the bolt thread section is located below the cylindrical boss. The bolt can control the compression of the cylinder head cover sealing ring and the spring through the cylindrical boss to prevent over-compression.

[0008] Preferably, a bushing is provided between the lower flange surface of the cylindrical boss and the cylinder head mounting surface, and the cylinder head cover sealing ring is located on the outer ring of the bushing.

[0009] Preferably, the lower flange face of the cylindrical boss of the bolt contacts the upper end of the bushing, and the lower end of the bushing contacts the top surface of the cylinder head.

[0010] Preferably, the outer circle of the bushing of the combined bolt is tapered, and its lower end diameter is larger than the diameter of the cylinder head cover sealing ring. During assembly, the cylinder head cover sealing ring is prevented from detaching by interference fit.

[0011] Preferably, the upper end of the bushing has an internal thread of 1-2 teeth, which is used to assemble it onto the bolt and prevent it from falling off. Below the internal thread section, there are two internal holes with different diameters. The lower internal hole has a larger diameter than the upper internal hole, which is used to avoid the bolt thread section.

[0012] Preferably, the cylinder head cover has a sealing ring mounting groove on the mounting flange surface for mounting the cylinder head cover sealing ring, and the bolt passes through the sealing ring mounting groove.

[0013] Preferably, the cylinder head cover sealing ring, after compression, fills the space between the cylinder head cover and the cylinder head through elastic deformation, thereby achieving a seal.

[0014] Preferably, the cylinder head cover sealing ring has a protrusion at its upper end that contacts the cylinder head cover, and a protrusion at its lower end that contacts the cylinder head.

[0015] Preferably, the cylinder head cover has a countersunk hole for mounting the bottom of the spring, and the bolt countersunk hole mounting surface for abutting the bottom of the spring is located at the bottom of the countersunk hole to provide a support surface for the spring. The top of the bolt has an upper hexagonal flange surface for abutting the top of the spring.

[0016] In summary, this utility model has the following beneficial technical effects:

[0017] This invention, through innovative design, combines the cylinder head cover sealing ring and the elastic deformation of a spring, allowing the cylinder head cover to be completely suspended above the cylinder head. This design effectively isolates vibrations and noise generated by the valve train, significantly reducing noise transmission and radiation. Compared to traditional rubber vibration damping bolts, this invention offers more stable and durable vibration isolation and noise reduction, meeting the high noise control requirements of modern engines.

[0018] This invention replaces the traditional single rubber vibration damping bolt with a combination of spring and sealing ring, effectively solving the problems of easy aging, permanent deformation, and insufficient locking force of rubber materials under high-temperature environments. The elasticity and durability of the spring are significantly better than those of rubber materials, enabling it to maintain stable vibration isolation performance under long-term, high-intensity operating conditions, thereby extending the noise reduction time of the housing and improving the overall system reliability.

[0019] This invention, through the conical structure and interference fit design of the bushing, ensures that the cylinder head cover sealing ring will not fall off during assembly, thereby avoiding liquid or gas leakage problems caused by the sealing ring falling off. This design not only improves the reliability of the seal but also enhances the safety of the system, making it particularly suitable for complex operating conditions such as high temperature and high pressure.

[0020] This invention achieves precise control over the compression of the cylinder head cover seal ring and spring by optimizing the height design of the cylindrical boss and bushing. This design effectively avoids the problem of seal ring crushing or spring failure due to over-compression during bolt tightening, ensuring the stability and reliability of the system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a fully suspended cover assembly equipped with spring bolts according to the present invention.

[0022] Figure 2 This is a schematic diagram of a fully suspended cover assembly with spring bolts before tightening the bolts, according to the present invention.

[0023] Figure 3 This is a schematic diagram of a fully suspended cover assembly with spring bolts installed according to the present invention after the bolts are tightened.

[0024] Figure 4This is a schematic diagram of the bolts in a fully suspended housing assembly equipped with spring bolts according to this utility model;

[0025] Figure 5 This is a schematic diagram of the cylinder head cover in a fully suspended cover assembly with spring bolts according to this utility model.

[0026] Reference numerals: 1. Cylinder head cover; 11. Bolt countersunk mounting surface; 12. Bolt through hole; 13. Seal ring mounting groove; 2. Cylinder head cover seal ring; 3. Combination bolt; 4. Cylinder head; 5. Bolt; 6. Spring; 7. Bushing; 8. Upper hexagonal flange face; 9. Cylindrical boss; 10. Bolt thread section. Detailed Implementation

[0027] 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.

[0028] This utility model discloses a fully suspended housing assembly equipped with spring bolts.

[0029] This utility model includes a cylinder head cover 1, which serves as the main body of the cover and internally houses the high-speed rotating valve train. The cylinder head cover 1 is mounted on top of the cylinder head 4 and is suspended on the cylinder head 4 by combination bolts 3. The cylinder head cover 1 has a sealing ring mounting groove 13 on the mounting flange surface for mounting the cylinder head cover sealing ring 2. The cylinder head cover sealing ring 2 is a T-shaped rubber sealing ring with a protrusion at its upper end that contacts the cylinder head cover 1 and two protrusions at its lower end that contact the cylinder head 4. It achieves a seal through elastic deformation, preventing liquid or gas leakage. Furthermore, in conjunction with a spring 6, it suspends the cylinder head cover 1 on the cylinder head 4, absorbing vibration through compression and reducing noise transmission. The cylinder head cover 1 isolates the noise of the valve train, preventing noise transmission and radiation through the cover. Through the suspension design and the elastic deformation of the cylinder head cover sealing ring 2, it further achieves vibration isolation and noise reduction effects.

[0030] The cylinder head cover 1 has mounting bolt holes around its flange, consisting of a countersunk hole and a through hole 12. The countersunk hole mounting surface 11 is located at the bottom of the countersunk hole in the cylinder head cover 1, is planar, and contacts the spring 6 in the combination bolt 3, providing a support surface for the spring 6 and ensuring stable force transmission after compression. The through hole 12 is located below the countersunk hole mounting surface 11, penetrating the cylinder head cover 1 to its bottom, allowing the combination bolt 3 to pass through and secure the cylinder head cover 1. The sealing ring mounting groove 13 is an annular groove located on the flange face of the cylinder head cover 1 near the cylinder head 4, providing an installation position for the cylinder head cover sealing ring 2, ensuring that the sealing ring fills the gap between the cylinder head cover 1 and the cylinder head 4 after compression.

[0031] The combination bolt 3 is composed of bolt 5, spring 6, and bushing 7. Bolt 5 has an upper hexagonal head flange face 8 at the top, a cylindrical boss 9 in the middle section, and an external thread section (bolt thread section 10) at the bottom. A shock-absorbing spring 6 is provided between the upper flange face of the cylindrical boss 9 and the upper hexagonal head flange face 8 of bolt 5, and a bushing 7 is provided between the lower flange face of the cylindrical boss 9 and the cylinder head 4 mounting surface.

[0032] The bushing 7 has a tapered outer diameter, wider at the bottom than the top, to prevent the cylinder head cover seal ring 2 from falling off. Its upper inner hole has 1-2 internal threads, the same as the lower external thread of the bolt 5, ensuring the bushing 7 can be securely fitted onto the bolt 5 via threaded engagement and will not fall off after being tightened. This design is not only crucial for the assembly of the bushing 7 and bolt 5 but also part of the cylinder head cover seal ring 2's anti-detachment function. Below the internal thread section of the bushing 7 are two sections of internal holes with different diameters; the lower section is slightly larger than the upper section to avoid the threaded section of the bolt 5. The upper hexagonal flange face 8 of the bolt 5 contacts the upper end of the spring 6, the lower flange face of the cylindrical boss 9 of the bolt 5 contacts the upper end of the bushing 7, the lower end of the bushing 7 contacts the top surface of the cylinder head 4, and the lower end of the spring 6 contacts the bolt countersunk mounting surface 11. The combined bolt 3 can control the compression of the cylinder head cover seal ring 2 and the spring 6 via the cylindrical boss 9, preventing over-compression.

[0033] When assembled, the cylinder head cover 1 and the cylinder head 4 are not in direct contact. The cylinder head cover 1 is suspended on the top surface of the cylinder head 4, with the cylinder head cover sealing ring 2 installed in the middle. After compression, the cylinder head cover sealing ring 2 fills the space between the cylinder head cover 1 and the cylinder head 4 through elastic deformation to seal it.

[0034] After bolt 5 is tightened, the lower end of bushing 7 contacts the top surface of cylinder head 4, and the upper end of bushing 7 contacts the lower end face of cylindrical boss 9. The lower end face of spring 6 contacts the bolt countersunk mounting surface 11 of cylinder head cover 1, and the upper end face of spring 6 contacts the upper hexagonal flange face 8 of bolt 5. At this time, spring 6 is in a compressed state, and cylinder head cover sealing ring 2 is also in a compressed state. Through the two elastic elements of cylinder head cover sealing ring 2 and spring 6, cylinder head cover 1 is completely suspended above cylinder head 4, effectively reducing noise transmission and achieving vibration reduction and noise reduction effects.

[0035] The bushing 7 of the combination bolt 3 has a tapered outer diameter, with its lower end diameter larger than that of the cylinder head cover seal ring 2. During assembly, the interference fit at this point can prevent the cylinder head cover seal ring 2 from detaching.

[0036] During the tightening of the combination bolt 3, bolt 5 will move downwards. When the lower flange face of the cylindrical boss 9 in the middle section of bolt 5 contacts the upper end face of the bushing 7, the downward displacement of bolt 5 stops. By designing the height dimensions of the cylindrical boss 9 and the bushing 7, precise control of the compression of the cylinder head cover seal ring 2 and the spring 6 can be achieved, preventing excessive downward displacement of bolt 5 during tightening, which could lead to excessive compression or even crushing of the cylinder head cover seal ring 2.

[0037] Through the above-described structural design, this utility model provides a fully suspended housing assembly with spring 6 and bolt 5 installed, which effectively improves the time limit and reliability of vibration isolation and noise reduction of the housing.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A full suspension enclosure assembly incorporating a spring bolt, characterized by, The utility model provides a cylinder head cover shell (1) arranged on a cylinder head (4) and a bolt (5) penetrating the cylinder head cover shell (1) and connected with the cylinder head (4), the upper and lower sections of the bolt (5) are respectively sleeved with a spring (6) and a cylinder head cover shell sealing ring (2), gaps are left between the cylinder head cover shell (1) and the cylinder head (4) and between the top of the bolt (5) and the cylinder head cover shell (1), the upper and lower ends of the spring (6) in the compressed state respectively abut against the top of the bolt (5) and the cylinder head cover shell (1).

2. A full suspension enclosure assembly mounting spring bolts as claimed in claim 1, wherein, The middle part of the bolt (5) is provided with a cylindrical boss (9), and a bolt threaded section (10) is located below the cylindrical boss (9), the bolt (5) can control the compression amount of the cylinder head cover shell sealing ring (2) and the spring (6) through the cylindrical boss (9), and overcompression is prevented.

3. A full suspension enclosure assembly mounting spring bolts as claimed in claim 2, wherein, A bushing (7) is arranged between the lower flange surface of the cylindrical boss (9) and the mounting surface of the cylinder head (4), and the cylinder head cover shell sealing ring (2) is located outside the bushing (7).

4. A full suspension enclosure assembly mounting spring bolts as claimed in claim 3, wherein, The lower flange surface of the cylindrical boss (9) of the bolt (5) is in contact with the upper end of the bushing (7), and the lower end of the bushing (7) is in contact with the top surface of the cylinder head (4).

5. A full suspension enclosure assembly mounting spring bolts as claimed in claim 4, wherein, The outer circle of the bushing (7) of the combined bolt (3) is a tapered structure, the diameter of the lower end is greater than that of the cylinder head cover shell sealing ring (2), and the cylinder head cover shell sealing ring (2) is prevented from falling off through interference during assembly.

6. A full suspension enclosure assembly mounting spring bolts as claimed in claim 5, wherein, An inner thread with 1-2 teeth is arranged in the upper end inner hole of the bushing (7), and two inner holes with different diameters are arranged below the inner thread section, and the diameter of the lower inner hole is greater than that of the upper inner hole, which is used for avoiding the bolt threaded section (10).

7. A full suspension enclosure assembly mounting spring bolts as claimed in any one of claims 1 to 6 wherein, A sealing ring mounting groove (13) for mounting the cylinder head cover shell sealing ring (2) is arranged on the mounting flange surface of the cylinder head cover shell (1), and the bolt (5) penetrates the sealing ring mounting groove (13).

8. A full suspension enclosure assembly mounting spring bolts as claimed in claim 7, wherein, The cylinder head cover shell sealing ring (2) fills the space between the cylinder head cover shell (1) and the cylinder head (4) through elastic deformation after compression, and sealing is realized.

9. A full suspension enclosure assembly mounting spring bolts as claimed in claim 8, wherein, A protrusion is arranged at the upper end of the cylinder head cover shell sealing ring (2) and is in contact with the cylinder head cover shell (1), and a protrusion is arranged at the lower end and is in contact with the cylinder head (4).

10. A full suspension enclosure assembly mounting spring bolts as defined in claim 1, wherein, The cylinder head cover shell (1) is provided with a counterbore for mounting the bottom of the spring (6), a bolt counterbore mounting surface (11) for abutting against the bottom of the spring (6) is located at the bottom of the counterbore, a support surface is provided for the spring (6), and an upper section hexagonal head flange surface (8) for abutting against the top of the spring (6) is arranged at the top of the bolt (5).

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