CN108952871A - Camshaft-bearing cap thrust structure - Google Patents
Camshaft-bearing cap thrust structure Download PDFInfo
- Publication number
- CN108952871A CN108952871A CN201811038487.7A CN201811038487A CN108952871A CN 108952871 A CN108952871 A CN 108952871A CN 201811038487 A CN201811038487 A CN 201811038487A CN 108952871 A CN108952871 A CN 108952871A
- Authority
- CN
- China
- Prior art keywords
- camshaft
- bearing cap
- intake
- side camshaft
- exhaust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0043—Arrangements of mechanical drive elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0476—Camshaft bearings
Abstract
The invention discloses a kind of camshaft-bearing cap thrust structures.The camshaft-bearing cap thrust structure includes: cylinder head, and top is machined with intake-side camshaft and holds seat and exhaust side cams bearing seat；Camshaft, comprising: intake-side camshaft and exhaust side camshaft；The inner end of the intake-side camshaft and exhaust side camshaft offers thrust shelves annular groove, and the inner end of the intake-side camshaft and exhaust side camshaft is held in seat and exhaust side cams bearing seat by the intake-side camshaft that respective thrust shelves annular groove is laid in cylinder head top side by side respectively；And camshaft-bearing cap, it is integral type camshaft-bearing cap, with intake-side camshaft bearing cap and exhaust side camshaft bearing cap, the two holds seat with the intake-side camshaft of cylinder head respectively and the cooperation of exhaust side cams bearing seat is fastened into gas side camshaft and exhaust side camshaft.The camshaft-bearing cap thrust structure has the function of dual thrust, and structurally reasonable, manufacturing cost is low, easy to spread.
Description
Technical field
The present invention relates to engine arts, especially with regard to a kind of camshaft-bearing cap thrust structure.
Background technique
During engine is designed and developed, camshaft is generally divided into middle and overhead type.According to overhead camshaft, generally
Camshaft-bearing cap can be used and cylinder head cooperates tightening cam axis.General camshaft-bearing cap does not have thrust function, thrust
Function is typically designed on cylinder cap, causes cylinder cover structure complicated, is not easy to casting processing.
The information disclosed in the background technology section is intended only to increase the understanding to general background of the invention, without answering
When being considered as recognizing or imply that the information constitutes the prior art already known to those of ordinary skill in the art in any form.
Summary of the invention
The purpose of the present invention is to provide a kind of simple and reasonable camshaft-bearing cap thrust structure, the cam shafts
Holding lid thrust structure has the function of dual thrust on the basis of being fastened into the integral cam axle bearing lid of exhaust side camshaft,
Structurally reasonable, manufacturing cost is low, easy to spread.
To achieve the above object, the present invention provides a kind of camshaft-bearing cap thrust structures, comprising: cylinder head, top
End is machined with intake-side camshaft and holds seat and exhaust side cams bearing seat；Camshaft, comprising: intake-side camshaft and exhaust side are convex
Wheel shaft；The inner end of the intake-side camshaft and exhaust side camshaft offers thrust shelves annular groove, the intake-side camshaft and
The inner end of exhaust side camshaft is laid in the intake-side camshaft on cylinder head top side by side by respective thrust shelves annular groove respectively
It holds in seat and exhaust side cams bearing seat, for controlling the unlatching and closed action of valve；And camshaft-bearing cap, it is one
Body formula camshaft-bearing cap, have intake-side camshaft bearing cap and exhaust side camshaft bearing cap, the two respectively with cylinder head
Intake-side camshaft hold seat and exhaust side cams bearing seat cooperation be fastened into gas side camshaft and exhaust side camshaft.
In a preferred embodiment, cylinder head uses overhead camshaft form.
In a preferred embodiment, camshaft-bearing cap further include: connection intake-side camshaft bearing cap and exhaust
The connector of side camshaft-bearing cap.
In a preferred embodiment, intake-side camshaft bearing cap offers intake-side camshaft slot, and air inlet side is convex
The two sides of wheel axial trough offer admission cam shaft screw hole, the intake-side camshaft slot and cylinder of the intake-side camshaft bearing cap
The Cam bearing pedestal of lid cooperates, and passes through admission cam shaft screw hole by the first bolt and be fastened into gas side camshaft；The exhaust
Side camshaft-bearing cap offers exhaust side cams axial trough, and the two sides of the exhaust side cams axial trough offer exhaust cam shaft spiral shell
Hole, the exhaust side cams axial trough of exhaust side camshaft bearing cap and the Cam bearing pedestal of cylinder head cooperate, and pass through the second bolt
Exhaust side camshaft is fastened across exhaust cam shaft screw hole.
In a preferred embodiment, the width of intake-side camshaft and the respective thrust shelves annular groove of exhaust side camshaft
Respectively with the equivalent width of intake-side camshaft bearing cap, exhaust side camshaft bearing cap.
Compared with prior art, camshaft-bearing cap thrust structure according to the present invention has the following beneficial effects: that this is convex
Wheel bearing lid thrust structure has dual stop on the basis of being fastened into the integral cam axle bearing lid of exhaust side camshaft
Function is pushed away, structurally reasonable, manufacturing cost is low, easy to spread.
Detailed description of the invention
Fig. 1 is the schematic perspective view of camshaft-bearing cap thrust structure according to an embodiment of the present invention.
Fig. 2 is the overlooking structure diagram of camshaft-bearing cap thrust structure according to an embodiment of the present invention.
Fig. 3 is the schematic cross-sectional view of camshaft-bearing cap thrust structure according to an embodiment of the present invention.
Fig. 4 is the camshaft-bearing cap stereochemical structure of camshaft-bearing cap thrust structure according to an embodiment of the present invention
Schematic diagram.
Fig. 5 is the camshaft-bearing cap front view structure of camshaft-bearing cap thrust structure according to an embodiment of the present invention
Schematic diagram.
Fig. 6 is the camshaft-bearing cap plan structure of camshaft-bearing cap thrust structure according to an embodiment of the present invention
Schematic diagram.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention will be described in detail, it is to be understood that guarantor of the invention
Shield range is not limited by the specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
As shown in Figure 1 to Figure 3, the specific structure of camshaft-bearing cap thrust structure according to the preferred embodiment of the present invention
It include: cylinder head 1, intake-side camshaft 2, exhaust side camshaft 3 and camshaft-bearing cap 4.Wherein, intake-side camshaft 2, row
Gas side camshaft 3 is laid in 1 top of cylinder head, and using overhead camshaft form, camshaft-bearing cap 4 and cylinder head 1 cooperate
It is fastened into gas side camshaft 2 and exhaust side camshaft 3.The camshaft-bearing cap thrust structure is being fastened into exhaust side camshaft
Has the function of dual thrust on the basis of integral cam axle bearing lid, structurally reasonable, manufacturing cost is low, easy to spread.
Specifically, the effect of cylinder head 1 is sealing cylinder, combustion space is collectively formed with piston, and bear high temperature height
The effect of compression ignition gas.Cylinder head bears mechanical load caused by gas force and fastening bolt cylinder, while due also to and high temperature
Contacts fuel gas and bear very high thermic load.In order to guarantee the excellent sealing of cylinder, cylinder head can neither be damaged, and can not be become
Shape.For this purpose, cylinder head should have enough strength and stiffness.Cylinder head is generally all cast by high-quality gray cast iron or alloy cast iron,
The gasoline engine of car then mostly uses aluminium alloy cylinder lid.Aluminium alloy thermal conductivity is good, is conducive to the compression ratio for improving engine.Its
Secondary, casting character is excellent, the part suitable for cast structure complexity.But the cooling that must be noted that aluminium alloy cylinder lid controls its bottom
The temperature of plane is at 300 DEG C or less.Otherwise, baseplane overheat will be generated and will be plastically deformed and warpage.Cylinder head is complicated
Box-shaped part.It is machined with Valve seat hole, valve guide hole, spark plug mounting hole (gasoline engine) or fuel injector installation thereon
Hole.A part of water jacket, entering and exhaust channel and combustion chamber or combustion chamber is also cast in cylinder head.The top of cylinder head 1 is machined with
Cam bearing pedestal, for being fastened into gas side camshaft 2 and exhaust side camshaft 3 with the cooperation of camshaft-bearing cap 4.
Camshaft is a component in piston engine.Its effect is to control the unlatching and closed action of valve.It is convex
The revolving speed of wheel shaft is very high, and needs to bear very big torque, therefore want in terms of intensity and support in design to camshaft
Ask very high, material is usually superior alloy steel or steel alloy.Since valve motion rule is related to the power of an engine
And service performance, therefore camshaft design in the design process of engine in occupation of highly important status.Camshaft includes:
Intake-side camshaft 2 and exhaust side camshaft 3.The inner end of intake-side camshaft 2 and exhaust side camshaft 3 offers thrust shelves
The inner end of annular groove 5, intake-side camshaft 2 and exhaust side camshaft 3 is laid in gas by respective thrust shelves annular groove 5 respectively side by side
In the Cam bearing pedestal on 1 top of cylinder cap, for controlling the unlatching and closed action of valve.
As shown in Figures 4 to 6, camshaft-bearing cap 4 is integral type camshaft-bearing cap, comprising: intake-side camshaft axis
Hold lid 41, exhaust side camshaft bearing cap 42 and the company for connecting the intake-side camshaft bearing cap, exhaust side camshaft bearing cap
Junctor 43.Intake-side camshaft bearing cap 41 offers intake-side camshaft slot, the two sides of intake-side camshaft slot offer into
Gas camshaft screw hole, the intake-side camshaft slot of intake-side camshaft bearing cap 41 and the Cam bearing pedestal of cylinder head 1 cooperate, and
Admission cam shaft screw hole, which is passed through, by the first bolt is fastened into gas side camshaft.Exhaust side camshaft bearing cap 42 offers exhaust
Side cam axial trough, the two sides of exhaust side cams axial trough offer exhaust cam shaft screw hole, the row of exhaust side camshaft bearing cap 42
Gas side cam axial trough and the Cam bearing pedestal of cylinder head 1 cooperate, and pass through exhaust cam shaft screw hole fastening row by the second bolt
Gas side camshaft.
Preferably, the width of intake-side camshaft 2 and the respective thrust shelves annular groove 5 of exhaust side camshaft 3 respectively with air inlet
The equivalent width of side camshaft-bearing cap 41, exhaust side camshaft bearing cap 42, thrust gap control by tolerance fit, play
Thrust function, because being the integral structure that bearing cap is intake and exhaust side camshaft, which has dual stop
Push away effect.Cylinder head and intake and exhaust cam axis cooperation section width are less than intake and exhaust side camshaft thrust shelves width, do not have thrust
Function.
To sum up, the camshaft-bearing cap thrust structure is in the integral cam axle bearing lid for being fastened into exhaust side camshaft
On the basis of have the function of dual thrust, structurally reasonable, manufacturing cost is low, easy to spread.
The aforementioned description to specific exemplary embodiment of the invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining specific principle of the invention and its actually answering
With so that those skilled in the art can be realized and utilize a variety of different exemplary implementation schemes of the invention and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (5)
1. a kind of camshaft-bearing cap thrust structure characterized by comprising
Cylinder head, top are machined with intake-side camshaft and hold seat and exhaust side cams bearing seat；
Camshaft, comprising: intake-side camshaft and exhaust side camshaft；The intake-side camshaft and exhaust side camshaft it is interior
It holds and offers thrust shelves annular groove, the inner end of the intake-side camshaft and exhaust side camshaft passes through respective thrust shelves ring respectively
The intake-side camshaft that slot is laid in cylinder head top side by side is held in seat and exhaust side cams bearing seat, for controlling opening for valve
It opens and closed action；And
Camshaft-bearing cap is integral type camshaft-bearing cap, has intake-side camshaft bearing cap and exhaust side camshaft
Bearing cap, the two holds seat with the intake-side camshaft of cylinder head respectively and the cooperation of exhaust side cams bearing seat is fastened into gas side cam
Axis and exhaust side camshaft.
2. camshaft-bearing cap thrust structure as described in claim 1, which is characterized in that the cylinder head is convex using overhead type
Wheel shaft form.
3. camshaft-bearing cap thrust structure as described in claim 1, which is characterized in that the camshaft-bearing cap also wraps
It includes: the connector of connection intake-side camshaft bearing cap and exhaust side camshaft bearing cap.
4. camshaft-bearing cap thrust structure as claimed in claim 3, which is characterized in that the intake-side camshaft bearing cap
Intake-side camshaft slot is offered, the two sides of intake-side camshaft slot offer admission cam shaft screw hole, the air inlet side cam
The intake-side camshaft slot of axle bearing lid and the Cam bearing pedestal of cylinder head cooperate, and pass through admission cam shaft by the first bolt
Screw hole is fastened into gas side camshaft；The exhaust side camshaft bearing cap offers exhaust side cams axial trough, and the exhaust side is convex
The two sides of wheel axial trough offer exhaust cam shaft screw hole, the exhaust side cams axial trough of exhaust side camshaft bearing cap and cylinder head
Cam bearing pedestal cooperation, and exhaust cam shaft screw hole is passed through by the second bolt and fastens exhaust side camshaft.
5. camshaft-bearing cap thrust structure as claimed in claim 4, which is characterized in that the intake-side camshaft and exhaust
The width of the respective thrust shelves annular groove of the side camshaft width with intake-side camshaft bearing cap, exhaust side camshaft bearing cap respectively
Degree is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811038487.7A CN108952871A (en) | 2018-09-06 | 2018-09-06 | Camshaft-bearing cap thrust structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811038487.7A CN108952871A (en) | 2018-09-06 | 2018-09-06 | Camshaft-bearing cap thrust structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108952871A true CN108952871A (en) | 2018-12-07 |
Family
ID=64476043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811038487.7A Pending CN108952871A (en) | 2018-09-06 | 2018-09-06 | Camshaft-bearing cap thrust structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108952871A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425464A (en) * | 2011-11-23 | 2012-04-25 | 奇瑞汽车股份有限公司 | First bearing cover of engine cylinder cover |
| CN202325721U (en) * | 2011-11-17 | 2012-07-11 | 广州汽车集团股份有限公司 | Cam shaft for engine |
| CN103133073A (en) * | 2011-11-25 | 2013-06-05 | 本田技研工业株式会社 | Camshaft support structure for internal combustion engine |
| CN204984517U (en) * | 2015-09-29 | 2016-01-20 | 东风商用车有限公司 | Compound cam axle is put to heavy -duty diesel oil machine double tops |
| CN208669367U (en) * | 2018-09-06 | 2019-03-29 | 广西玉柴机器股份有限公司 | Camshaft-bearing cap thrust structure |
-
2018
- 2018-09-06 CN CN201811038487.7A patent/CN108952871A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202325721U (en) * | 2011-11-17 | 2012-07-11 | 广州汽车集团股份有限公司 | Cam shaft for engine |
| CN102425464A (en) * | 2011-11-23 | 2012-04-25 | 奇瑞汽车股份有限公司 | First bearing cover of engine cylinder cover |
| CN103133073A (en) * | 2011-11-25 | 2013-06-05 | 本田技研工业株式会社 | Camshaft support structure for internal combustion engine |
| CN204984517U (en) * | 2015-09-29 | 2016-01-20 | 东风商用车有限公司 | Compound cam axle is put to heavy -duty diesel oil machine double tops |
| CN208669367U (en) * | 2018-09-06 | 2019-03-29 | 广西玉柴机器股份有限公司 | Camshaft-bearing cap thrust structure |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181207 |