CN209925099U

CN209925099U - Prevent cylinder head structure that seal structure was heated

Info

Publication number: CN209925099U
Application number: CN201821815203.6U
Authority: CN
Inventors: 兰棠洁; 何化; 余晓强; 朱杰
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2018-11-06
Filing date: 2018-11-06
Publication date: 2020-01-10
Anticipated expiration: 2028-11-06

Abstract

The utility model relates to an engine cylinder head cover specifically is a prevent cylinder head structure that seal structure was heated, including cylinder head, cylinder head cover, camshaft bearing frame, camshaft bearing cap, sealing washer and rocking arm shaft bearing frame, be provided with interior concave part to the inboard direction on the cylinder head cover lateral wall, interior concave part is located the solid position top at the gas vent top of cylinder head with the hookup location of cylinder head, and is close to the water course position in the cylinder head. This structure makes the sealing washer be close to the water course, avoids cylinder head cover sealing washer local heating, prolongs the life of sealing washer, improves the structural strength of cylinder head cover simultaneously, improves the operational reliability of engine.

Description

Prevent cylinder head structure that seal structure was heated

Technical Field

The utility model relates to an engine cylinder head cover specifically is a prevent cylinder head structure that seal structure is heated.

Background

The cylinder head is mounted on the upper surface of the cylinder block, and seals the cylinder from above to form a combustion chamber. The water-cooled engine is often contacted with high-temperature high-pressure fuel gas, so that the water-cooled engine bears great heat load and mechanical load, and a cooling water jacket is arranged in a cylinder cover of the water-cooled engine, and cooling water holes on the lower end surface of the cylinder cover are communicated with cooling water holes of a cylinder body. A seal ring is provided between a cylinder head and a cylinder head cover of an engine to enhance the sealing between the cylinder head and the cylinder head cover to prevent leakage of lubricating oil in the cylinder head and the cylinder head cover.

In order to meet the requirement of light weight of an engine, a cylinder cover is developed towards the direction of compact structure, the height of the cylinder cover and the height of a cylinder cover are gradually reduced in volume, the distance between a sealing ring between the cylinder cover and a heated area of the cylinder cover is closer to the original distance, the arrangement of a water channel in the cylinder cover is more complex and difficult, the water channel is difficult to cover each heated area, local high temperature is easily generated, if the water channel is not arranged in the position of the cylinder cover below the sealing ring, heat accumulation is easily generated, the sealing ring is easily heated and loses efficacy, and.

SUMMERY OF THE UTILITY MODEL

The utility model provides a prevent cylinder head structure that seal structure was heated makes the sealing washer be close to the water course, avoids cylinder head cover sealing washer part to be heated, prolongs the life of sealing washer, improves the structural strength of cylinder head cover simultaneously, improves the operational reliability of engine.

The technical scheme of the utility model as follows: a cylinder cover structure for preventing a sealing ring from being heated comprises a cylinder cover, a cylinder cover, a camshaft bearing seat, a camshaft bearing cover, a sealing ring and a rocker shaft bearing seat, wherein the sealing ring is arranged at the contact position of the cylinder cover and the cylinder cover; the sealing ring is positioned between the cylinder head cover and the cylinder cover and is arranged along the outline of the cylinder head cover. The cylinder head cover is at the gas vent top indent of cylinder head, makes the sealing washer avoid directly being heated in the gas vent side, and the sealing washer is in water course position top, is favorable to the heat dissipation, prevents that the sealing washer between cylinder head and the cylinder head cover from inefficacy because of being heated, and the indent structure has improved the structural strength of cylinder head cover simultaneously.

Preferably, the solid part above the exhaust port is provided with a threaded hole for installing the exhaust pipe, and the arrangement of the inner concave part solves the heat dissipation problem of the sealing ring after the solid part of the cylinder cover is provided with the threaded hole, so that the arrangement of the installation position of the exhaust pipe is facilitated.

Preferably, the cylinder cover and the camshaft bearing block are designed in a split mode, the camshaft bearing block is installed on the top face of the cylinder cover through bolts, the camshaft bearing block and the camshaft bearing cover can be made of aluminum alloy materials, the weight of an engine can be reduced, and light weight is achieved.

Preferably, the camshaft bearing cover and the rocker shaft bearing seat are integrally designed, the assembly procedures are reduced by adopting the integral design, the positioning precision is high, and the cost is saved.

Preferably, the cylinder head cover and the cylinder head are fastened through bolts, so that the connection is reliable, the cost is low, and the disassembly is convenient.

Drawings

Fig. 1 is a schematic perspective view of a cylinder head structure for preventing a sealing structure from being heated according to the present invention.

Fig. 2 is a front view structural diagram of a cylinder head structure for preventing a sealing structure from being heated according to the present invention.

Fig. 3 is a sectional view of the line a-a of fig. 2.

Fig. 4 is an explosion diagram of a cylinder head structure for preventing a sealing structure from being heated according to the present invention.

In the figure: 1. a cylinder head; 11. an exhaust port; 12. a water channel; 13. a threaded hole; 2. a cylinder head cover; 21. an inner concave portion; 3. a camshaft bearing seat; 4. a camshaft bearing cap; 5. a seal ring; 6. rocking arm axle bearing frame.

The specific implementation mode is as follows:

the present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 1, 2 and 3, a cylinder head structure for preventing a seal ring from being heated includes a cylinder head 1, a cylinder head cover 2, a camshaft bearing seat 3, a camshaft bearing cover 4, a seal ring 5 and a rocker shaft bearing seat 6, the seal ring 5 is disposed at a contact position of the cylinder head cover 2 and the cylinder head 1, the camshaft bearing cover 4 is respectively connected with the camshaft bearing seat 3 and the rocker shaft bearing seat 6, an inward concave portion 21 is disposed on a side wall of the cylinder head cover 2 in an inward direction, and a joint position of the inward concave portion 21 and the cylinder head 1 is located above a solid portion at the top of an exhaust port 11 of the cylinder head 1 and is close to a water channel 12 in the cylinder head 1. The camshaft bearing block 3 is installed on the cylinder cover 1 by adopting bolt connection.

As shown in fig. 2 and 3, a screw hole 13 for mounting an exhaust pipe is provided in a solid portion above the exhaust port 11.

As shown in fig. 4, the camshaft bearing cover 4 and the rocker shaft bearing block 6 are integrally formed, and the cylinder head cover 2 and the cylinder head 1 are fastened together by bolts.

In another embodiment of the present invention, the cylinder head 1 and the camshaft bearing seat are integrally designed as 3, and are integrally cast and formed by cast iron.

Claims

1. The utility model provides a prevent cylinder head structure that seal structure was heated which characterized in that: the cylinder cover comprises a cylinder cover (1), a cylinder cover (2), a camshaft bearing seat (3), a camshaft bearing cover (4), a sealing ring (5) and a rocker shaft bearing seat (6), wherein the camshaft bearing cover (4) is respectively connected with the camshaft bearing seat (3) and the rocker shaft bearing seat (6), the camshaft bearing seat (3) is arranged on the top surface of the cylinder cover (1), an inward concave part (21) is arranged on the side wall of the cylinder cover (2) to the inner side, the inward concave part (21) is positioned above an exhaust passage, and a water channel (12) is arranged between the inward concave part (21) and the exhaust port (11); the sealing ring (5) is located between the cylinder head cover (2) and the cylinder head (1) and is installed along the outer contour of the cylinder head cover (2).

2. A cylinder head structure for preventing a seal structure from being heated according to claim 1, wherein: the cylinder cover (1) and the camshaft bearing seat (3) adopt a split design.

3. A cylinder head structure for protecting a seal structure from heat according to claim 1 or 2, wherein: the camshaft bearing cover (4) and the rocker shaft bearing seat (6) are integrally designed.