CN203476416U - Cam shaft - Google Patents
Cam shaft Download PDFInfo
- Publication number
- CN203476416U CN203476416U CN201320490881.0U CN201320490881U CN203476416U CN 203476416 U CN203476416 U CN 203476416U CN 201320490881 U CN201320490881 U CN 201320490881U CN 203476416 U CN203476416 U CN 203476416U
- Authority
- CN
- China
- Prior art keywords
- thrust plate
- boss
- cam shaft
- thrust
- camshaft
- 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.)
- Expired - Lifetime
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- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The utility model discloses a cam shaft which comprises a cam shaft body. A boss is arranged on the end portion of one end of the cam shaft body, the boss is sleeved with the first thrust plate, a through hole which is matched with the boss in diameter is formed in the first thrust plate, a bolt hole which is used for fixing the first thrust plate on an engine body is formed in the first thrust plate, a second thrust plate is arranged on the other side of the first thrust plate, the outer diameter of the second thrust plate is larger than that of the through hole in the first thrust plate, and the second thrust plate is connected with the boss through a fastening part. A thrust structure is arranged at one end, with the small torsional vibration and away from a timing gear, of the cam shaft, meanwhile, it is avoided that a thrust groove is formed in the shaft neck of the cam shaft, and therefore the strength of the cam shaft is improved. The possibility that the cam shaft is out of operation under the large torsional vibration is reduced, the length of the cam shaft extending out of a machine body due to the arrangement of the thrust groove is reduced, the structure is more compact, materials are saved, and meanwhile the reliability of cam shaft working is increased.
Description
Technical field
The utility model relates to a kind of camshaft.
Background technique
Camshaft a: part in I. C engine distribution mechanism, timing gear are equipped with in its one end, rotate under the driving of bent axle, control the lifting of tappet by the rotation of cam, and then control the open and close of valve.Traditional camshaft is all generally to push away groove in the axle journal place opening and closing with timing gear connecting end, thrust groove be fixed on thrust plate on engine body and coordinate and realize thrust.Raising along with engine speed and reinforcing degree, and from single actuated by cams list valve to the hyperpneustic development trend of single actuated by cams, the moment of torsion that camshaft bears is also increasing, the situation that camshaft lost efficacy because of torsional oscillation is more and more, and thrust groove is set on camshaft, certainly will cause thrust groove place strength decreased, in addition nearer with the tapped hole of connection teeth timing gear, easily cause camshaft at the structural weak at thrust groove place, torsional oscillation is herein also comparatively violent, be prone to the situation that camshaft ruptures because of torsional oscillation, therefore be badly in need of changing thrust structure and increase camshaft structure intensity, avoid camshaft to lose efficacy.
Summary of the invention
The technical problems to be solved in the utility model is to provide the camshaft that a kind of structural strength is high.
For solving the problems of the technologies described above, the utility model comprises camshaft body, the end of camshaft body one end is provided with boss, on boss, be set with the first thrust plate, the first thrust plate is provided with the through hole adapting with boss diameter, the first thrust plate is provided with for being packed in the bolt hole on engine body, the opposite side of described the first thrust plate is provided with the second thrust plate, the external diameter of described the second thrust plate is greater than the external diameter of the through hole of the first thrust plate, and the second thrust plate is connected by fastening piece with boss.
Described boss is annular, and the thickness that its thickness is greater than the first thrust plate makes the end of boss stretch out the end face of the first thrust plate.
Described boss is provided with a plurality of tapped holes, and the second thrust plate is provided with and the tapped hole position on boss, big or small corresponding tapped hole, and the second thrust plate is connected by clamping bolt with boss.
Described boss is arranged on the opposite end of camshaft and timing gear connecting end.
Adopt after said structure, the utility model by thrust structure be arranged on camshaft torsional oscillation less, away from one end of timing gear, avoid pushing away groove in camshaft bearing journal place opening and closing simultaneously, thereby improved the intensity of camshaft, reduce the possibility that camshaft lost efficacy under large torsional oscillation, reduced because arranging that thrust groove stretches out extra-organismal camshaft length, structure is more compact, when saving material, increased the reliability of camshaft work.
Accompanying drawing explanation
Below in conjunction with the drawings and the specific embodiments, the utility model is described in further detail:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is perspective view of the present utility model;
Fig. 3 is assembling schematic diagram of the present utility model.
Embodiment
As shown in Figure 1 to Figure 3, camshaft comprises camshaft body 1, camshaft body 1 in the opposite end with timing gear connecting end the end of the right-hand member shown in figure be provided with annular boss 2, on boss 2, be set with the first thrust plate 3, the both sides up and down of the first thrust plate 3 are respectively equipped with for being packed in the bolt hole 5 on engine body, the middle part of the first thrust plate 3 is provided with the through hole 4 that diameter is greater than boss 2 diameters, the external diameter that the right side of the first thrust plate 3 is provided with the second thrust plate 6, the second thrust plates 6 is greater than the external diameter of the through hole 4 of the first thrust plate 3.In the present embodiment, boss 2 is provided with three tapped holes, 7, the second thrust plates 6 and is provided with boss 2 positions, tapped hole 7, the second thrust plates 6 corresponding to size and is connected by three clamping bolts 8 with boss 2, also can connect by other fastening pieces, such as screw herein.In the utility model, the thickness of boss 2 is slightly larger than the thickness of the first thrust plate 3, and the end face of the first thrust plate 3 is stretched out in the right part that assembles rear boss 2, and this kind of structure can reduce contacting of the second thrust plate 6 and the first thrust plate 3, and then avoids friction between the two.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model.Previous embodiment has been described in detail the utility model, and for a person skilled in the art, its technological scheme that still can record aforementioned each embodiment is modified, or part technical characteristics is wherein equal to replacement.In every case within inventive concept scope of the present utility model, any modification of making, be equal to replacement, improvement etc., within being all included in protection domain of the present utility model.
Claims (4)
1. a camshaft, it is characterized in that comprising camshaft body (1), the end of camshaft body (1) one end is provided with boss (2), on boss (2), be set with the first thrust plate (3), the first thrust plate (3) is provided with the through hole (4) adapting with boss (2) diameter, the first thrust plate (3) is provided with for being packed in the bolt hole (5) on engine body, the opposite side of described the first thrust plate (3) is provided with the second thrust plate (6), the external diameter of described the second thrust plate (6) is greater than the external diameter of the through hole (4) of the first thrust plate (3), the second thrust plate (6) is connected by fastening piece with boss (2).
2. camshaft according to claim 1, is characterized in that described boss (2) is for annular, and the thickness that its thickness is greater than the first thrust plate (3) makes the end of boss (2) stretch out the end face of the first thrust plate (3).
3. camshaft according to claim 1, it is characterized in that described boss (2) is provided with a plurality of tapped holes (7), the second thrust plate (6) is provided with and tapped hole (7) position on boss (2), big or small corresponding tapped hole (7), and the second thrust plate (6) is connected by clamping bolt with boss (2).
4. according to the camshaft described in claims 1 to 3 any one, it is characterized in that described boss (2) is arranged on the opposite end of camshaft body (1) and timing gear connecting end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320490881.0U CN203476416U (en) | 2013-08-13 | 2013-08-13 | Cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320490881.0U CN203476416U (en) | 2013-08-13 | 2013-08-13 | Cam shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203476416U true CN203476416U (en) | 2014-03-12 |
Family
ID=50224761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320490881.0U Expired - Lifetime CN203476416U (en) | 2013-08-13 | 2013-08-13 | Cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203476416U (en) |
-
2013
- 2013-08-13 CN CN201320490881.0U patent/CN203476416U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140312 |
|
| CX01 | Expiry of patent term |