CN209925101U

CN209925101U - Flat-top cylinder cover structure capable of preventing sealing structure from being heated

Info

Publication number: CN209925101U
Application number: CN201821821547.8U
Authority: CN
Inventors: 兰棠洁; 何化; 余晓强; 朱杰; 赵宁宁
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, in particular to a flat-top cylinder head structure for preventing a sealing structure from being heated, which comprises a cylinder head, a cylinder head cover, a camshaft bearing seat, a camshaft bearing cover, a sealing ring and a rocker shaft bearing seat; all machined surfaces of the top surface of the cylinder cover are located on the same plane, the camshaft bearing cover is respectively connected with the camshaft bearing seat and the rocker shaft bearing, an inward concave part is arranged on the bottom of the side wall of the cylinder cover inwards, and the combination position of the inward concave part and the cylinder cover is located above the solid part at the top of the exhaust port and close to the position of a water channel in the cylinder cover. All the machined surfaces of the top surface of the cylinder cover are positioned on the same plane, so that the height of the cylinder cover is reduced, the weight of the cylinder cover is reduced, and the replacement and maintenance of mounting parts of the cylinder cover are facilitated; the bottom of cylinder head cover sets up interior concave part, realizes that the sealing washer is good dispels the heat, and the indent structure has improved cylinder head cover's structural strength simultaneously.

Description

Flat-top cylinder cover structure capable of preventing sealing structure from being heated

Technical Field

The utility model relates to an engine cylinder head cover specifically is a flat-top cylinder head structure that prevents seal structure and be heated.

Background

In the technical field of multi-cylinder diesel engines, the weight is reduced simultaneously for the reduce cost, the cylinder head thickness reduces, and the cylinder head top is very close to the fire face distance, and the cylinder head cover is heated easily. However, a seal ring is provided between the cylinder head and the cylinder head cover of the engine in order to enhance the sealing performance therebetween and prevent the lubricating oil in the cylinder head and the cylinder head cover from leaking. However, due to the development of lightweight cylinder covers, particularly the top of a flat-top cylinder cover, the cylinder cover is directly contacted with the cylinder cover, the size of the cylinder cover is reduced, the thickness of the cylinder cover is reduced, the arrangement space of water channels is reduced, the water channels are difficult to be arranged below the positions of the top of the cylinder cover, heat accumulation is easy to generate, the sealing ring is easy to heat and lose efficacy, engine oil leakage is caused, and when lightweight measures of compact structure or thickness reduction of the cylinder cover are implemented, the sealing ring is difficult to ensure heat dissipation, and the sealing ring is easy to lose efficacy.

SUMMERY OF THE UTILITY MODEL

The utility model provides a flat-top cylinder cover structure for preventing a sealing structure from being heated, all machining surfaces of the top surface of a cylinder cover are positioned on the same plane, the height of the cylinder cover is reduced, the weight of the cylinder cover is reduced, and the replacement and maintenance of mounting parts of the cylinder cover are facilitated; the bottom of cylinder head cover sets up interior concave part, realizes that the sealing washer is good dispels the heat, and the indent structure has improved cylinder head cover's structural strength simultaneously.

The technical scheme of the utility model as follows: a flat-top cylinder cover structure for preventing a sealing structure from being heated comprises a cylinder cover, a cylinder cover hood, a camshaft bearing seat, a camshaft bearing cover, a sealing ring and a rocker shaft bearing seat; all machined surfaces of the top surface of the cylinder cover are positioned on the same plane, the camshaft bearing seat, the camshaft bearing cover and the rocker shaft bearing seat are made of the same aluminum alloy material, the camshaft bearing seat is installed on the top surface of the cylinder cover, the camshaft bearing cover is respectively connected with the camshaft bearing seat and the rocker shaft bearing seat, an inward concave part is arranged on the side wall of the cylinder cover towards the inner side, the inward concave part is positioned above the exhaust port, and a water channel is arranged between the inward concave part and the exhaust port; 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 top surface of the cylinder cover is designed to be a plane, so that the processing difficulty of the cylinder cover is reduced, the weight of the cylinder cover is reduced, and the replacement and maintenance of a cylinder cover component are facilitated; the camshaft bearing block and the cylinder cover are designed in a split mode, so that mounting parts on the top of the cylinder cover, such as the camshaft bearing block, the camshaft bearing cover, the rocker shaft bearing block and the like, can be made of aluminum alloy materials, and the weight of an engine is further reduced; the cylinder head cover is recessed above the exhaust port of the cylinder head, so that the sealing ring is prevented from being directly heated above the exhaust port; prevent that the sealing washer between cylinder head and the cylinder head cover from becoming invalid because of being heated, 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 camshaft bearing cover and the rocker shaft bearing seat are designed integrally, the assembly procedures are reduced by adopting the integrated 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.

Preferably, the camshaft bearing seat, the camshaft bearing cover and the rocker arm shaft bearing seat are all made of the same aluminum alloy material, and accessories at the top of the cylinder cover are all made of aluminum alloy materials, so that light weight is realized.

Drawings

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

Fig. 2 is a front view structural diagram of a flat-top cylinder head structure for preventing a sealing structure from being heated.

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

Fig. 4 is an exploded view of a flat-top cylinder head structure for preventing a sealing structure from being heated according to the present invention.

Fig. 5 is a schematic perspective view of the top surface of the cylinder head 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 block 3; 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 flat-top cylinder head structure for preventing a sealing structure from being heated comprises a cylinder head 1, a cylinder head cover 2, a camshaft bearing seat 3, a camshaft bearing cover 4, a sealing ring 5 and a rocker shaft bearing seat 6; camshaft bearing frame 3 camshaft bearing cap 4 with rocking arm shaft bearing frame 6 all adopts the same race aluminum alloy material, camshaft bearing frame 3 adopts bolted connection to install the top surface of cylinder head 1, camshaft bearing cap 4 respectively with camshaft bearing frame 3 with rocking arm shaft bearing frame 6 is connected, sealing washer 5 is located cylinder head cover 2 with cylinder head 1 contact department, the lateral wall bottom of cylinder head cover 2 is equipped with interior recess 21 to the inboard, the combination position of interior recess 21 and cylinder head 1 is located the solid position top at exhaust port 11 top and is close to water course 12 position in the cylinder head 1.

As shown in fig. 5, all machined surfaces of the top surface of the cylinder head 1 are in the same plane.

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 seat 6 are designed as a whole, and the cylinder head cover 2 and the cylinder head cover 1 are fastened by bolts, so that the connection is reliable, the cost is low, and the disassembly is convenient.

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

Claims

1. The utility model provides a prevent flat-top cylinder head structure that seal structure was heated which characterized in that: the device 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); all machined surfaces of the top surface of the cylinder cover (1) are located on the same plane, the camshaft bearing block (3) is installed on the top surface of the cylinder cover (1) in a bolt connection mode, the camshaft bearing cover (4) is respectively connected with the camshaft bearing block (3) and the rocker shaft bearing, an inward concave portion (21) is arranged on the side wall of the cylinder cover (2) towards the inner side, the inward concave portion (21) is located above the exhaust port (11), and a water channel (12) is arranged between the inward concave portion (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 flattop cylinder head structure for protecting a seal structure from heat as claimed in claim 1, wherein: the camshaft bearing cover (4) and the rocker shaft bearing seat (6) are designed into a whole.