CN202970817U - Camshaft of combustion engine - Google Patents
Camshaft of combustion engine Download PDFInfo
- Publication number
- CN202970817U CN202970817U CN201220473821.3U CN201220473821U CN202970817U CN 202970817 U CN202970817 U CN 202970817U CN 201220473821 U CN201220473821 U CN 201220473821U CN 202970817 U CN202970817 U CN 202970817U
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- camshaft
- shaft part
- section
- weak
- weak shaft
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Abstract
The utility model discloses a camshaft of a combustion engine, which includes driving ends, bearing journals, basic shaft sections, and multiple cams positioned among the bearing journals, wherein the bearing journals and the cams, as well as the cams, are connected through weak shaft sections, and the diameters of the cross sections of the weak shaft sections closer to the driving ends are greater. According to the camshaft of the combustion engine, the diameters of the cross sections of the weak shaft sections closer to the driving ends are greater, and a main weak shaft section is designed into conical-surface transition connection to correspondingly improve the safety factor of a dangerous section, so that the strength and the rigidity of the whole camshaft are improved and the failure of fracture of the camshaft of the combustion engine is avoided.
Description
Technical field
The utility model relates to field of internal combustion engine, particularly a kind of internal combustion (IC) engine camshaft.
Background technique
Camshaft is the vitals in I. C engine distribution mechanism, is used for driving the Push And Release of valve and determines the valve lift Changing Pattern.It directly affects the carrying out of burning, therefore affects the links such as engine performance, fuel consumption and emission.Concerning underneath camshaft is arranged, camshaft by transmission system drives after, drive the regular movement up and down of tappet, thereby promote pushrod movement, push rod promotes again rocker part, opens and closes valve.Concerning overhead cam axle construction, camshaft by transmission system drives after, directly driving rolls rocker part or cup-shaped tappet valve parts, open and close valve indirectly or directly.
Camshaft as shown in Figure 1, powered drive wheel 2 is connected by bolt 21 with camshaft the first drive end 11, and by locating stud 22 location, 2 inputs of power source driven force drive wheel, the drive cam shaft rotation, the first drive end 11 right sides of camshaft are disposed with the first bearing journal 12, the first main weak shaft part 13, the first cam 14, weak shaft part 15, the second cam 16, the 3rd weak shaft part 17, the second bearing journal 18 and the first standard shaft section 19 for the first time, and the camshaft rotation is by the first cam 14 and the second cam 16 drives tappets 3 and push rod 4 moves up and down.Concerning six cylinders support camshaft entirely, have seven bearing journals, 12 cams, concerning four cylinders support camshaft entirely, have five bearing journals, eight cams, therefore, the first standard shaft section 19 back shown in Figure 1 also have remaining shaft part, axle journal and cam to omit not draw, the camshaft of all the other cylinder numbers the like.
Wherein, the first main weak shaft part 13, weak shaft part 15, the 3rd weak shaft part 17 are identical with the diameter of the first standard shaft section 19 for the first time, that is to say, the first main weak shaft part, weak shaft part, the 3rd weak shaft part and the second standard shaft section size are the same for the first time, and namely whole camshaft shaft part size is unified is standard shaft section size.Camshaft is subjected to rotate under the transmission system drives moment of torsion on the one hand, be subjected to again on the other hand the impact of the reaction force of driven Valve Rocker Organization, and the closer to the first drive end 11, cross section, the position safety coefficient of the weak shaft part of these of camshaft is lower, easier of these weak shaft parts positions fracture, particularly in the first main weak shaft part 13 position fractures, cause combustion engine powered forfeiture, affect the significant trouble of car load safety traffic.
The model utility content
The utility model is in order to overcome defective in above-mentioned prior art, to provide a kind of structural strength high, being not easy fracture, the internal combustion (IC) engine camshaft that safety coefficient is high.
For achieving the above object, provide a kind of internal combustion (IC) engine camshaft according to the utility model, comprising: drive end, bearing journal and standard shaft section, and a plurality of cams between bearing journal; Between bearing journal and cam, be connected by weak shaft part between cam, larger the closer to the diameter of section of the described weak shaft part of drive end.
In technique scheme, the diameter of section of weak shaft part is all greater than described standard shaft section.
In technique scheme, the most described weak shaft part of close drive end is taper, and the large end of taper is near drive end, and the diameter of the small end of taper is greater than the diameter of adjacent weak shaft part.
Compared with prior art, the utlity model has following beneficial effect: the weak shaft part of internal combustion (IC) engine camshaft of the present utility model is larger the closer to the diameter of section of drive end, wherein main weak shaft part is designed to the conical surface transition connection, with the safety coefficient on corresponding raising dangerouse cross-section, thereby improve the strength and stiffness of whole camshaft, avoid the fault of Engine Cam axle fracture.
Description of drawings
Fig. 1 is the main TV structure schematic diagram of existing internal combustion (IC) engine camshaft;
Fig. 2 is the main TV structure schematic diagram of internal combustion (IC) engine camshaft of the present utility model;
Description of reference numerals:
11-the first drive end, 12-the first bearing journal, the main weak shaft part of 13-first, 14-the first cam, 15-is weak shaft part for the first time, 16-the second cam, the weak shaft part of 17-the 3rd, 18-the second bearing journal, 19-the first standard shaft section, the 2-powered drive wheel, the 21-bolt, 22-locating stud, 3-tappet, the 4-push rod, 51-the second drive end, 52-the 3rd bearing journal, the main weak shaft part of 53-second, 54-the 3rd cam, 55-is weak shaft part for the second time, 56-four-cam, the weak shaft part of 57-the 4th, 58-the 4th bearing journal, 59-the second standard shaft section.
Embodiment
Below in conjunction with accompanying drawing, an embodiment of the present utility model is described in detail, but is to be understood that protection domain of the present utility model is not subjected to the restriction of embodiment.It will be appreciated that, mentioned in following mode of execution of the present utility model " on ", D score, " left side ", " right side ", " front " and " reverse side " be all take the direction shown in each figure as benchmark, these words that are used for limiting direction are only for convenience of explanation, do not represent the restriction to the concrete technological scheme of the utility model.
As shown in Figure 2, internal combustion (IC) engine camshaft of the present utility model comprises: the second drive end 51 and be successively set on the 3rd bearing journal 52, the second main weak shaft part 53, the 3rd cam 54 on this second drive end 51 right sides, weak shaft part 55, four-cam 56, the 4th weak shaft part 57, the 4th bearing journal 58 and the second standard shaft section 59 for the second time, this internal combustion (IC) engine camshaft rotation is by the 3rd cam 54 and four-cam 56 drives tappets and push rod moves up and down.
Wherein, the second main weak shaft part 53 is the taper of large end for left end, make connection between the 3rd bearing journal 52 and the 3rd cam 54 become tapering transition and connect, and the end diameter of taper is greater than the diameter of weak shaft part 55 for the second time.Because being subjected to the impact of driving torque, the closer to drive end, cross section, position safety coefficient on the second main weak shaft part is lower, therefore, main weak shaft part is designed to the tapered cross-section transition, and the closer to drive end, diameter of section is larger, more be conducive to improve the safety coefficient on each cross section, thereby solve the problem of off-axis.
Weak shaft part 55, the 4th weak shaft part 57 and the second standard shaft section 59 are cylindrical-shaped structure for the second time, three's diameter of section is dwindled successively by left-to-right, to strengthen successively the cross section safety coefficient of the close drive end of each shaft part on the possible weak shaft part between bearing journal, improve the strength and stiffness of whole camshaft, thereby avoid the catastrophe failure of camshaft fracture to occur.
This internal combustion (IC) engine camshaft is when having carried out strengthening design to weak shaft part, diameter away from the second standard shaft section after the 4th bearing journal 58 of the second drive end 51 can design than also little before improving, so that this internal combustion (IC) engine camshaft overall weight does not increase.
The weak shaft part of internal combustion (IC) engine camshaft of the present utility model is larger the closer to the diameter of section of drive end, wherein main weak shaft part is designed to the conical surface transition connection, with the safety coefficient on corresponding raising dangerouse cross-section, thereby improve the strength and stiffness of whole camshaft, avoid the fault of Engine Cam axle fracture.
Above disclosed be only several specific embodiment of the present utility model, still, the utility model is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection domain of the present utility model.
Claims (3)
1. an internal combustion (IC) engine camshaft, is characterized in that, comprising: drive end, bearing journal and standard shaft section, and a plurality of cams between described bearing journal; Between described bearing journal and cam, be connected by weak shaft part between described cam, larger the closer to the diameter of section of the described weak shaft part of described drive end.
2. internal combustion (IC) engine camshaft according to claim 1, it is characterized in that: the diameter of section of described weak shaft part is all greater than described standard shaft section.
3. internal combustion (IC) engine camshaft according to claim 1 and 2, it is characterized in that: the most described weak shaft part of close described drive end is taper, the large end of described taper is near described drive end, and the diameter of the small end of described taper is greater than the diameter of adjacent described weak shaft part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220473821.3U CN202970817U (en) | 2012-06-26 | 2012-09-18 | Camshaft of combustion engine |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220301861 | 2012-06-26 | ||
| CN201220301861.X | 2012-06-26 | ||
| CN201220473821.3U CN202970817U (en) | 2012-06-26 | 2012-09-18 | Camshaft of combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202970817U true CN202970817U (en) | 2013-06-05 |
Family
ID=48511904
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220473821.3U Expired - Lifetime CN202970817U (en) | 2012-06-26 | 2012-09-18 | Camshaft of combustion engine |
| CN201210344430.6A Pending CN103511011A (en) | 2012-06-26 | 2012-09-18 | Camshaft of internal combustion engine |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210344430.6A Pending CN103511011A (en) | 2012-06-26 | 2012-09-18 | Camshaft of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN202970817U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410581A (en) * | 2013-07-05 | 2013-11-27 | 广西玉柴机器股份有限公司 | Internal combustion engine cam shaft |
| CN103511011A (en) * | 2012-06-26 | 2014-01-15 | 广西玉柴机器股份有限公司 | Camshaft of internal combustion engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105990919B (en) * | 2015-02-11 | 2020-01-07 | 上海鸣志电器股份有限公司 | High-speed motor rotor based on segmented magnetic steel and variable cross-section shaft |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3285915B2 (en) * | 1991-12-20 | 2002-05-27 | ヤマハ発動機株式会社 | Engine assembled camshaft |
| JP3058078B2 (en) * | 1996-02-22 | 2000-07-04 | トヨタ自動車株式会社 | Internal combustion engine with variable valve timing mechanism |
| JP2000329214A (en) * | 1999-05-21 | 2000-11-30 | Mitsubishi Materials Corp | Assembly camshaft and manufacture thereof |
| JP2002357261A (en) * | 2001-05-31 | 2002-12-13 | Mitsubishi Heavy Ind Ltd | Structure and manufacturing method for assembly shaft including assembly type cam shaft |
| JP2003262105A (en) * | 2002-03-08 | 2003-09-19 | Musashi Seimitsu Ind Co Ltd | Cam shaft |
| JP4140029B2 (en) * | 2003-04-28 | 2008-08-27 | 三菱自動車工業株式会社 | Internal combustion engine camshaft structure |
| CN202970817U (en) * | 2012-06-26 | 2013-06-05 | 广西玉柴机器股份有限公司 | Camshaft of combustion engine |
-
2012
- 2012-09-18 CN CN201220473821.3U patent/CN202970817U/en not_active Expired - Lifetime
- 2012-09-18 CN CN201210344430.6A patent/CN103511011A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511011A (en) * | 2012-06-26 | 2014-01-15 | 广西玉柴机器股份有限公司 | Camshaft of internal combustion engine |
| CN103410581A (en) * | 2013-07-05 | 2013-11-27 | 广西玉柴机器股份有限公司 | Internal combustion engine cam shaft |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103511011A (en) | 2014-01-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |
|
| CX01 | Expiry of patent term |