CN101705880A

CN101705880A - Engine cylinder cap with rib plates

Info

Publication number: CN101705880A
Application number: CN200910191549A
Authority: CN
Inventors: 成卫国; 任志勇; 李春
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2009-11-24
Filing date: 2009-11-24
Publication date: 2010-05-12

Abstract

The invention provides an engine cylinder cap with rib plates. Lifter bores, an oil filling chamber of the cylinder cap, an oil discharging chamber of the cylinder cap, a bearing seat of a cam shaft of cylinder cap, a cam shaft installing hole, a sparking plug hoe boss, a correct-time gear cavity of engine and the like are distributed on a cylinder cap body. The improvement is as follows: the rib plates are distributed around the lifter bores and is arranged at the boundary of the oil filling chamber of the cylinder cap and the oil discharging chamber of the cylinder cap, and the walls of the rib plates, connected with the lifter bores and the side wall of the cylinder cap form an integral structure between two rows of lifter bores at the air filling side and the air discharging side of the cylinder cap. Therefore, the thickness of the partial walls of the lifter bores can be increased through adding the rib plates around the lifter bores of the cylinder cap, the strength of the lifter bores are enhanced so that the deformation ratio of a cylinder cap blank machine during the addition of back lifter bores is greatly reduced. A plurality of lifter bores and the sparking plug boss are connected into a whole by the rib plates so that the rigidity of the cylinder cap is enhanced and the NVH performance of the cylinder cap is increased.

Description

A kind of engine cylinder cap of sheet with rib

Technical field

The invention belongs to technical field of engines, be specifically related to be provided with the cylinder head of strengthening gusset around a kind of tappet hole.

Background technique

Because the engine cylinder cap compact structure, cylinder head blank tappet hole hole wall can only be selected the minimum value of casting technique regulation wall thickness usually.Cylinder head blank is in machine adds, and after tappet hole and cylinder head construction bolt through-hole machine added, cylinder head tappet hole hole wall can reduce again, and the tappet hole of thin-walled deforms when machine adds the back stress relief easily like this, can not reach designing requirement.

Be the engine cylinder cap that is furnished with tappet hole 1 as shown in Figure 1, tappet hole 1 is suspended in cylinder head lower oil chamber 2 tops, just supports by cylinder head sidewall 3 and cylinder head camshaft bearing bush seat 4, and the rigidity in cylinder head tappet hole 1 and intensity are just poor like this.

Summary of the invention

The objective of the invention is to improve on the very thin cylinder head of tappet hole hole wall causing because of the engine cylinder cap compact structure, obtain a kind of engine cylinder cover of sheet with rib, improve the rigidity in cylinder cap tappet hole, prevent that cylinder head blank from adding back tappet bore deformation at machine, when improving cylinder head tappet hole strength, also improve the rigidity of cylinder head, increase the NVH performance.

Technological scheme of the present invention is as follows:

The engine cylinder cover of the sheet with rib that the present invention proposes has the cylinder cap body, the same with existing cylinder head, be furnished with tappet hole, cylinder head upper chamber and cylinder head lower oil chamber, cylinder head camshaft bearing bush seat, camshaft mounting hole, spark-plug hole boss and engine timing gear chamber etc. on described cylinder cap body, it is constant that these all keep existing structure.

Improvement of the present invention is, at tappet hole arranged around gusset, and with the location arrangements of described gusset boundary (being the mold joint place of the husky core in grease chamber) in cylinder head upper chamber and cylinder head lower oil chamber, and between cylinder head air inlet side and exhaust side two row's tappet holes; Described gusset is enclosed in around the tappet hole, forms overall structure with the wall that the tappet hole is connected with the cylinder head sidewall.Like this,, tappet hole local wall thickness is increased, improve the intensity in tappet hole, make the cylinder head blank machine add the probability that tappet hole, back deforms and reduce greatly by increasing gusset around in cylinder head tappet hole.Gusset will be one by one tappet hole and spark-plug hole boss be linked to be an integral body, the rigidity of cylinder head is increased, increased the NVH performance of cylinder head.

Because the cylinder head front end is the timing gear chamber of motor, gusset must guarantee not interfere with timing gear in the position of cylinder head front end.The effect of gusset mainly is to increase tappet hole local wall thickness, so at the cylinder cover back-end, gusset also need not to link to each other with the cylinder head sidewall, therefore, the front end and back end of gusset all is designed to the breach form of stepping down of circular arc, makes gusset reach the situation therapeutic method to keep the adverse qi flowing downward cylinder cap quality minimum of functional requirement.

The present invention is by increasing the cylinder head gusset, makes on the cylinder head independently that the tappet hole is linked to be an integral body, can improve the intensity in tappet hole, prevents that the cylinder head blank machine from adding back tappet bore deformation, can increase the rigidity of cylinder head thus, improves the NVH performance; Arrange the cylinder head gusset like this, can on original mould, make the purpose that simple modification just can realize increasing gusset, the expense and the cycle that repair a die are all reduced greatly.

Description of drawings

Fig. 1 is the partial structurtes schematic representation of existing cylinder head in the tappet hole site

Fig. 2 is the plane structure schematic representation of the cylinder head that proposes of the present invention;

Fig. 3 is the A-A sectional drawing of Fig. 2;

Fig. 4 is the C-C sectional drawing of Fig. 2;

Fig. 5 is the B-B sectional drawing of Fig. 2.

1 expression tappet hole among the figure, 2 expression cylinder head lower oil chamber, 3 expression cylinder head sidewalls, 4 expression cylinder head camshaft bearing bush seats, 5 expression camshaft mounting holes, 6 expression gussets, 7 expression spark-plug hole boss, 8 expression cylinder head jacket plugging holes, 9 expression cylinder head construction bolt through holes, 10 expression cylinder head upper chamber; 11 expression cylinder head front ends; 12 expression cylinder head rear ends; 13 expression cylinder head air inlet sides; 14 expression cylinder head exhaust sides, the wall that 15 expression tappet holes link to each other with the cylinder head sidewall; 16 expression engine timing gear chambeies; 17 expression machining holes.

Embodiment

Describe structure of the present invention in detail below in conjunction with accompanying drawing:

As Fig. 2, Fig. 3, Fig. 4 and shown in Figure 5, this engine cylinder cover has the basic structure of existing cylinder head, i.e. the same tappet hole 1, cylinder head upper chamber 10, cylinder head lower oil chamber 2, cylinder head camshaft bearing bush seat 4, camshaft mounting hole 5, spark-plug hole boss 7 and the engine timing gear chamber 16 etc. of being furnished with existing structure on the cylinder cap body.The location arrangements of the gusset 6 that this structure heart increases is at the boundary of cylinder head upper chamber 10 with cylinder head lower oil chamber 2, be connected between two row's tappet holes 1 of cylinder head air inlet side 13 and exhaust side 14, be enclosed in around the tappet hole 1, form overall structure with the wall 15 that tappet hole 1 is connected with the cylinder head sidewall.The cylinder head front end is the timing gear chamber 16 of motor, gusset 6 must guarantee not interfere with timing gear in the position of cylinder head front end 11, and the effect of gusset 6 mainly is the local wall thickness that increases tappet hole 1, so at cylinder cover back-end 12, gusset 6 also need not to link to each other with cylinder head sidewall 3, so gusset 6 front end and back end all are designed to the circular arc cutaway form, make gusset 6 reach the situation therapeutic method to keep the adverse qi flowing downward cylinder cap quality minimum of functional requirement.

Referring to Fig. 5, because on cylinder head, cylinder head jacket plugging hole 8 and cylinder head construction bolt through hole 9 need processing, so gusset 6 also need be avoided cylinder head construction bolt through hole 9, and have also reserved the machining hole 17 of water jacket plugging hole 8 on gusset 6.

Claims

1. the engine cylinder cover of a sheet with rib, it has the cylinder cap body, is furnished with tappet hole (1), cylinder head upper chamber (10), cylinder head lower oil chamber (2), cylinder head camshaft bearing bush seat (4), camshaft mounting hole (5), spark-plug hole boss (7) and engine timing gear chamber (16) on described cylinder cap body; It is characterized in that:

Arranged around has gusset (6) in tappet hole (1), and the location arrangements of described gusset (6) is at the boundary of cylinder head upper chamber (10) and cylinder head lower oil chamber (2), and arranges between the tappet holes (1) in cylinder head air inlet side (13) and exhaust side (14) two; Described gusset (6) is enclosed in tappet hole (1) on every side, forms whole with the wall (15) that tappet hole (1) is connected with the cylinder head sidewall.

2. the engine cylinder cover of sheet with rib according to claim 1, it is characterized in that: described gusset (6) is not linking to each other with cylinder head sidewall (3) near the front position of cylinder head front end (11) and the back-end location of cylinder cover back-end (12), and all is designed to the circular arc breach of stepping down in the front end and back end of gusset (6).

3. according to the engine cylinder cover of claim 12 described sheet with rib alive, it is characterized in that: described gusset (6) is reserved with machining hole (17) corresponding to cylinder head jacket plugging hole (8) on the cylinder head and cylinder head construction bolt through hole (9) position.