CN103147875B - Timing sprocket shroud - Google Patents
Timing sprocket shroud Download PDFInfo
- Publication number
- CN103147875B CN103147875B CN201310062742.2A CN201310062742A CN103147875B CN 103147875 B CN103147875 B CN 103147875B CN 201310062742 A CN201310062742 A CN 201310062742A CN 103147875 B CN103147875 B CN 103147875B
- Authority
- CN
- China
- Prior art keywords
- bonnet body
- timing sprocket
- lug boss
- natural frequency
- shroud
- 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.)
- Active
Links
- 238000001746 injection moulding Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses a kind of timing sprocket shroud, comprise bonnet body, described bonnet body is provided with the lug boss increasing bonnet body natural frequency.By arranging the lug boss increasing its natural frequency on bonnet body, making the natural frequency of bonnet body be far longer than the frequency of noise like this, increasing the defening effect of bonnet body, thus playing better noise reduction.
Description
Technical field
The present invention relates to automotive engine applications, be specifically related to a kind of timing sprocket shroud.
Background technique
Timing sprocket system due to himself permanent maintenance-free and take up space little, be applied to the transmission system of motor more and more widely.Timing sprocket system has the advantage of self, but also has the problem that cannot eliminate, and forms because the chain link that engages in timing sprocket system and sprocket wheel are rigid material, and engagement order noise is large.Timing sprocket shroud makes timing sprocket system be sealed, and therefore can play Noise Reduction to a certain extent, but the noise that timing sprocket system spreads out of is still larger, be therefore necessary to provide a kind of can the timing sprocket shroud of better noise reduction.
Summary of the invention
The object of this invention is to provide a kind of timing sprocket shroud, can better insulate against sound to the noise of engine interior.
For achieving the above object, present invention employs following technological scheme: a kind of timing sprocket shroud, comprises bonnet body, it is characterized in that: described bonnet body is provided with the lug boss increasing bonnet body natural frequency.
By arranging the lug boss increasing its natural frequency on bonnet body, making the natural frequency of bonnet body be far longer than the frequency of noise like this, increasing the defening effect of bonnet body, thus playing better noise reduction.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
The object of the invention is to better carry out noise reduction to motor, as shown in Figure 1, a kind of timing sprocket shroud, comprises bonnet body 10 to its scheme taked, and described bonnet body 10 is provided with the lug boss 11 increasing bonnet body 10 natural frequency.First the stiffening rib 12 that lug boss 11 and the bonnet body 10 of the application's indication are arranged has essential difference, and as shown in fig. 1, stiffening rib 12 is the ribs for increasing bonnet body 10 intensity arranged between original on bonnet body 10 inner side surface, adjacent bolt hole.And although the jut arranged in the application also can increase the intensity of bonnet body 10 to a certain extent, but it is mainly used for the natural frequency improving bonnet body 10, in general operation process, the density of the lug boss 11 that unit area is arranged is greater than the density of stiffening rib 12, and the height of lug boss 11 will be smaller than stiffening rib 12.The existing timing sprocket shroud main cause not good to motor defening effect be because, timing sprocket system engages the frequency of noise that sends and the natural frequency of timing sprocket shroud is comparatively close, the weak effect of such timing sprocket shroud sound insulation, therefore adopt in the application and the natural frequency that lug boss 11 increases timing sprocket shroud is set, the natural frequency of timing sprocket shroud is far longer than frequency that timing sprocket system engages the noise sent, thus play good defening effect, reduce the noise of vehicle.
In the specific implementation, lug boss 11 is arranged on the inner side surface of bonnet body 10.Described lug boss 11 is that the bar-shaped raised line of the bar protruding from bonnet body 10 surface of injection moulding on bonnet body 10 is formed.Described lug boss is that parallel column-shaped is arranged on bonnet body 10 inner side surface.But for obtaining better effect, the scheme more optimized is, described lug boss 11 is arranged along position corresponding with motor inner camshaft front end on bonnet body 11 inner side surface.Described raised line 11 is combined into and latticedly arranges on bonnet body 10 inner side surface.The lattice of the grid that described raised line is formed are wide is 18 ~ 22mm.The program is adopted to implement, the natural frequency of bonnet body 10 can be increased to about 2700 ~ 3000HZ, be far longer than the frequency that timing sprocket system engages the noise sent, about about 200HZ, therefore extraordinary defening effect can be played, adopt latticed lug boss 11 to carry out layout design simultaneously, sound wave can be made to reflect between adjacent jut 11, that is decay, further guarantee noise can not unofficial biography, in addition, also can reduce the area that lug boss 11 is set, reduce cost of production and the die sinking being convenient to injection mould.During specific operation, can adjust accordingly lug boss 11 according to the size of the number of camshaft and the sprocket wheel that it is arranged, to obtain better defening effect.Meanwhile, in the application, lug boss 11 molding and forming together with bonnet body 10, simplifies the operation arranging protuberance 11 at bonnet body 10, is easier to the production in enormous quantities of bonnet body 10.In a word, the present invention can effectively insulate against sound to the noise that the engagement of timing sprocket system produces, and reduces the noise of vehicle.
Claims (3)
1. a timing sprocket shroud, comprises bonnet body (10), it is characterized in that: described bonnet body (10) is provided with the lug boss (11) increasing bonnet body (10) natural frequency;
Described lug boss (11) is arranged on the inner side surface of bonnet body (10);
Described lug boss (11) is arranged along position corresponding with motor inner camshaft front end on bonnet body (10) inner side surface;
The raised line protruding from the surperficial bar of bonnet body (10) bar-shaped that described lug boss (11) is the upper injection moulding of bonnet body (10) is formed;
Described raised line is combined into and latticedly arranges on bonnet body (10) inner side surface.
2. timing sprocket shroud as claimed in claim 1, is characterized in that: described raised line is that parallel column-shaped is arranged on bonnet body (10) inner side surface.
3. timing sprocket shroud as claimed in claim 1, is characterized in that: the lattice of the grid that described raised line is formed are wide is 18 ~ 22mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310062742.2A CN103147875B (en) | 2013-02-28 | 2013-02-28 | Timing sprocket shroud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310062742.2A CN103147875B (en) | 2013-02-28 | 2013-02-28 | Timing sprocket shroud |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103147875A CN103147875A (en) | 2013-06-12 |
| CN103147875B true CN103147875B (en) | 2015-09-23 |
Family
ID=48546140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310062742.2A Active CN103147875B (en) | 2013-02-28 | 2013-02-28 | Timing sprocket shroud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103147875B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2559777B (en) | 2017-02-17 | 2019-05-01 | Ford Global Tech Llc | An engine comprising an engine casing and a dipstick |
| CN111058963B (en) * | 2019-12-31 | 2020-12-08 | 宝鸡吉利发动机有限公司 | Engine timing guard shield, engine and vehicle |
| CN113753134A (en) * | 2021-09-16 | 2021-12-07 | 东风柳州汽车有限公司 | Engine timing cover, engine and automobile |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4395982A (en) * | 1980-06-30 | 1983-08-02 | M.A.N. Maschinenfabrik Augsburg-Nurnberg Ag | Casing member for elements of internal combustion engines |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05306632A (en) * | 1992-04-30 | 1993-11-19 | Suzuki Motor Corp | Timing belt cover of engine |
| JPH06146916A (en) * | 1992-11-04 | 1994-05-27 | Suzuki Motor Corp | Timing belt cover of engine |
| JP2000008950A (en) * | 1998-06-19 | 2000-01-11 | Suzuki Motor Corp | Cover plate structure of internal combustion engine |
| CN102121429A (en) * | 2011-03-23 | 2011-07-13 | 重庆长安汽车股份有限公司 | Front shell of vehicle engine |
-
2013
- 2013-02-28 CN CN201310062742.2A patent/CN103147875B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4395982A (en) * | 1980-06-30 | 1983-08-02 | M.A.N. Maschinenfabrik Augsburg-Nurnberg Ag | Casing member for elements of internal combustion engines |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103147875A (en) | 2013-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103147875B (en) | Timing sprocket shroud | |
| CN204733358U (en) | Microspeaker | |
| CN107321927B (en) | It is a kind of convenient for the whole naked orthogonal sets cored structure poured | |
| CN204075072U (en) | A kind of improvement valve body casting mould | |
| CN205300095U (en) | Cold storage plant door body | |
| CN203639314U (en) | Choke plug | |
| CN203161374U (en) | Sound-proof shield of automobile engine cylinder head | |
| CN204828427U (en) | Shock attenuation sealing bolt for car | |
| CN205110695U (en) | Hub die's lower mould | |
| CN204194754U (en) | Die casting flange location structure | |
| CN103161603A (en) | Blimp of automobile engine cylinder cover | |
| CN205365753U (en) | Car back shroud unable adjustment base | |
| CN204194727U (en) | Manufacture the equipment of the entering and exhaust channel core of cylinder cap | |
| CN203038849U (en) | Vacuum circuit breaker | |
| CN204510029U (en) | Road sound insulation sound insulation slab | |
| CN205260167U (en) | Shell support warp under air cleaner structure is improved | |
| CN203413906U (en) | Sectional material for enclosure frame of refrigerator opening | |
| CN103615295A (en) | Manufacturing technology for engine oil pan | |
| CN204510032U (en) | A kind of road sound insulation sound insulation slab | |
| CN204810018U (en) | Shock attenuation electric motor rotor | |
| CN203734794U (en) | Sound box and box body | |
| CN202935301U (en) | Automobile front end grating structure | |
| CN201994153U (en) | Novel lightning arrester plug | |
| CN203617475U (en) | Audio cable connector | |
| CN203126981U (en) | Automobile wheel casing oil filling port with reinforcing ribs |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |