CN203374335U - Cam shaft profile structure - Google Patents
Cam shaft profile structure Download PDFInfo
- Publication number
- CN203374335U CN203374335U CN201320356723.6U CN201320356723U CN203374335U CN 203374335 U CN203374335 U CN 203374335U CN 201320356723 U CN201320356723 U CN 201320356723U CN 203374335 U CN203374335 U CN 203374335U
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- Prior art keywords
- angle
- cam
- valve
- camshaft
- cam shaft
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- Expired - Fee Related
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Abstract
The utility model discloses a cam shaft profile structure in the technical field of engine cam shafts. A cam buffer angle of a cam shaft is changed to reduce the accelerated speed of a buffer section, so that motion vibration during rotating of the entire cam shaft is reduced, and noise reduction can be achieved.
Description
Technical field
The utility model belongs to the engine cam technical field, is specifically related to the camshaft molded line structure.
Background technique
The molded line of cam is decided by its lifting curve (or lift table), and lifting curve obtains corresponding with it velocity curve to the time differentiate, then the time differentiate is obtained to corresponding with it acceleration diagram.If determined the switching angle of lift and valve, to the basic demand of lifting curve, be: the containment area between lifting curve and X-axis wants large, this just can make intake and exhaust abundant, therefore require the speed of valve lifting to want fast, but the impact when reducing air valve drop, the seating velocity of valve requires slow as much as possible, on the other hand, in the working procedure of valve, require acceleration as far as possible little, with the impact that reduces distribution device and the wearing and tearing of part, and avoid causing the disengaging of tappet and cam face, if the disengaging of tappet and cam face, the adverse consequencess such as valve and piston collision likely appear, in sum, containment area, speed, the factors such as acceleration are restrictions mutually, take into account each side in the hope of optimum efficiency.The size of lift is also one and is difficult to the problem determined, lift greatly containment area is large, but the harder problem of acceleration solves, acceleration while taking a seat is too fast, easily invention is aobvious to make air valve drop sound, total noise of centrifuge is bigger than normal, and working environment has been caused to very large harm, and the disable velocity of the recoil section of taking a seat of camshaft is also very fast simultaneously.
The model utility content
It is little that the technical problems to be solved in the utility model is to provide a kind of noise, shakes little camshaft molded line structure.
In order to solve the problems of the technologies described above, the utility model provides following camshaft molded line structure.
Technological scheme one: the camshaft molded line structure, comprise camshaft basic circle and cam peach, described camshaft basic circle is that integral type is connected with the cam peach, the camshaft Base radius is 15mm; It is 5 ° that cam peach radial center to breeze way starts angle, and opening bumper angle is 17 °, and closing bumper angle is 17 °, and valve opening angle and valve closing angle are 55 °; With in the choosing of upper angle, valve opening angle and valve closing angle are got formed objects.
By breeze way to the reducing of speed, make whole motion vibrations reduce, thereby realize the effect of noise reduction.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is the structural representation of the utility model camshaft molded line structure.
Embodiment
As shown in Figure 1, camshaft Base radius 1 is 15mm, cam profile maximum lift 7.4858mm, breeze way cam lift 0.2024mm.The valve opening section: it is 5 ° that cam peach radial center 2 to breeze way starts 4 first angles 3, it is 17 ° to the unlatching breeze way angle 5 of eliminating valve clearance 6 fully that breeze way starts 4, eliminating valve clearance 6 fully is 55 ° to the valve opening angle 7 of valve maximum lift 8, closing flank: valve maximum lift 8 is 55 ° to the valve-closing angle 9 of valve-closing 10, valve-closing 10 is 17 ° to the breeze way angle 11 of closing of breeze way end 12, it is 5 ° to cam peach radial center 2 second angles 13 that breeze way finishes 12, cam center is 22.5mm to cam peach top distance 14.
Camshaft is in rotary course, and the actual measured value between angle of swing and lift is as follows:
Above-described is only preferred implementation of the present utility model, should be understood that for a person skilled in the art, under the prerequisite that does not break away from the utility model structure, can also make some distortion and improvement, these can not affect effect and practical applicability that the utility model is implemented.
Claims (1)
1. the camshaft molded line structure, comprise camshaft basic circle and cam peach, and described camshaft basic circle is that integral type is connected with the cam peach, and it is characterized in that: the camshaft Base radius is 15mm; It is 5 ° that cam peach radial center to breeze way starts angle, and opening bumper angle is 17 °, and closing bumper angle is 17 °, and valve opening angle and valve closing angle are 55 °; With in the choosing of upper angle, valve opening angle and valve closing angle are got formed objects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320356723.6U CN203374335U (en) | 2013-06-21 | 2013-06-21 | Cam shaft profile structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320356723.6U CN203374335U (en) | 2013-06-21 | 2013-06-21 | Cam shaft profile structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203374335U true CN203374335U (en) | 2014-01-01 |
Family
ID=49836868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320356723.6U Expired - Fee Related CN203374335U (en) | 2013-06-21 | 2013-06-21 | Cam shaft profile structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203374335U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994002A (en) * | 2014-05-25 | 2014-08-20 | 辽宁新风企业集团有限公司 | Cam shaft for high-pressure oil pump |
| CN110529213A (en) * | 2019-09-24 | 2019-12-03 | 深圳臻宇新能源动力科技有限公司 | Exhaust cam and engine with it |
-
2013
- 2013-06-21 CN CN201320356723.6U patent/CN203374335U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994002A (en) * | 2014-05-25 | 2014-08-20 | 辽宁新风企业集团有限公司 | Cam shaft for high-pressure oil pump |
| CN103994002B (en) * | 2014-05-25 | 2018-10-26 | 辽宁新风企业集团有限公司 | High-pressure oil pump camshaft |
| CN110529213A (en) * | 2019-09-24 | 2019-12-03 | 深圳臻宇新能源动力科技有限公司 | Exhaust cam and engine with it |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140101 Termination date: 20160621 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |