CN201560814U - Positioning structure of rocker arm shaft for underneath cam type engine - Google Patents
Positioning structure of rocker arm shaft for underneath cam type engine Download PDFInfo
- Publication number
- CN201560814U CN201560814U CN2009202071222U CN200920207122U CN201560814U CN 201560814 U CN201560814 U CN 201560814U CN 2009202071222 U CN2009202071222 U CN 2009202071222U CN 200920207122 U CN200920207122 U CN 200920207122U CN 201560814 U CN201560814 U CN 201560814U
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- CN
- China
- Prior art keywords
- changing arm
- lower shake
- arm axle
- cylinder block
- rocker arm
- 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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Abstract
The utility model relates to a positioning structure of a rocker arm shaft for an underneath cam type (CG series) engine. The positioning structure comprises a lower rocker arm shaft (1) fixed on a cylinder block (4) via a bolt (3) for connecting a cylinder end and the cylinder block and a mounting hole (a) of the lower rocker arm shaft and is characterized by further comprising a positioning shaft (2) of the lower rocker arm shaft, wherein the bolt (3) for connecting the cylinder end and the cylinder block is connected with the upper end of the positioning shaft (2) of the lower rocker arm shaft; the positioning shaft (2) of the lower rocker arm shaft passes through the mounting hole (a) of the lower rocker arm shaft to fix the lower rocker arm shaft (1) on the cylinder block (4); and the lower end of the positioning shaft (2) of the lower rocker arm shaft is positioned on the cylinder block (4). By accurately fixing the position of the lower rocker arm, the positioning structure of the utility model can guarantee the uniformity of production assembly; by preventing the lower rocker arm shaft from axially shifting and preventing oil from leaking out from a seal ring, the positioning structure of the utility model can reduce the noise of the overall engine and improve the comfortableness and reliability thereof.
Description
Technical field
The utility model relates to a kind of underlying cam engine, relates in particular to a kind of pitman arm shaft position structure of underlying cam engine.
Background technique
The underlying cam engine, promptly the CG Engine Series is widely used in two-wheeled and motor tricycle, and along with people's growth in the living standard, present Consumer requires more and more stricter to the whole aircraft reliability and the noise of motor.But existing C G Engine Series, because the orientation type of lower shake-changing arm axle is unreasonable, the lower shake-changing arm axle is when the lower shake-changing arm high-speed motion, and play causes the noise of motor to increase and the seal ring leakage of oil too greatly, and this is a very general problem.
As shown in Figure 1, the CG underlying cam lower shake-changing arm axle position structure of prior art is that the lower shake-changing arm axle is fixed on the cylinder block by cylinder head cylinder body connecting bolt.Since cylinder head cylinder body connecting bolt must and cylinder block between the assurance certain clearance can normally assemble, be the screw thread location simultaneously between cylinder head cylinder body connecting bolt and the lower shake-changing arm axle, therefore the lower shake-changing arm axle is subjected to when high engine speeds turn round after the intense impact of lower shake-changing arm axially that play produces noise, and the while has also caused the wearing and tearing of seal ring.In addition, because cylinder head cylinder body connecting bolt is connected on the lower shake-changing arm axle, so just make the lower shake-changing arm axle mounting hole of cylinder block produce distortion under the effect of cylinder head cylinder body connecting bolt connection pulling force, this is another reason of lower shake-changing arm axle mounting hole place's leakage of oil.
The model utility content
The purpose of this utility model is to provide a kind of underlying cam engine pitman arm shaft position structure, and this structure has overcome the problem of the big and seal ring leakage of oil of the noise of motor.
The utility model is achieved through the following technical solutions: a kind of underlying cam engine pitman arm shaft position structure, comprise by cylinder head cylinder body connecting bolt and lower shake-changing arm axle mounting hole and be fixed in lower shake-changing arm axle on the cylinder block, it is characterized in that: described position structure also comprises lower shake-changing arm axle positioning shaft; Wherein said cylinder head cylinder body connecting bolt is connected with described lower shake-changing arm axle positioning shaft upper end, and described lower shake-changing arm axle positioning shaft passes described lower shake-changing arm axle mounting hole the lower shake-changing arm axle is fixed on the cylinder block, and lower shake-changing arm axle positioning shaft lower end is positioned on the cylinder block.
Above-mentioned lower shake-changing arm axle positioning shaft upper and lower end all embeds in the cylinder block, and the lower end is positioned in the cylinder block trough of belt by locating stud, can prevent that after cooperating lower shake-changing arm axle positioning shaft from rotating with cylinder head cylinder body connecting bolt when assembling, with the reliability that guarantees that it is threaded.
Above-mentioned lower shake-changing arm axle positioning shaft is to be positioned in the cylinder block trough of belt by the locating stud that a horizontal length is longer than lower shake-changing arm axle positioning shaft diameter.
Above-mentioned lower shake-changing arm axle positioning shaft is that interference fit is connected with described cylinder block, thereby has prevented the noise that lower shake-changing arm axle axial float brings and the wearing and tearing of seal ring.
Compared to existing technology, the utlity model has following advantage:
The utility model can be accurately the fixing position of lower shake-changing arm, guarantee to produce the assembling conformity.
2. the utility model can also prevent lower shake-changing arm axle axial float, and prevents the seal ring leakage of oil, and has reduced motor complete machine noise, has improved complete machine travelling comfort and reliability.
Description of drawings
Fig. 1 is the CG underlying cam lower shake-changing arm axle position structure plan view of prior art, comprising: (1) lower shake-changing arm axle, (2) cylinder head cylinder body connecting bolt, (3) cylinder block, (4) lower shake-changing arm, (5) seal ring and (a) lower shake-changing arm axle mounting hole.
Fig. 2 is the underlying cam engine pitman arm shaft position structure plan view among the utility model embodiment 1, comprising: (1) lower shake-changing arm axle, (2) lower shake-changing arm axle positioning shaft, (3) cylinder head cylinder body connecting bolt, (4) cylinder block, (5) lower shake-changing arm, (6) seal ring, (a) lower shake-changing arm axle mounting hole, (b) locating stud and (c) cylinder block trough of belt.
Fig. 3 is the sectional view of the lower shake-changing arm axle in the underlying cam engine pitman arm shaft position structure among the utility model embodiment 1.
Fig. 4 is the sectional view of the lower shake-changing arm axle positioning shaft in the underlying cam engine pitman arm shaft position structure among the utility model embodiment 1.
Fig. 5 is the plan view of the cylinder block in the underlying cam engine pitman arm shaft position structure among the utility model embodiment 1.
Fig. 6 is the A-A sectional view of Fig. 5.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments, but therefore the utility model is not limited among the following concrete mode.
Embodiment 1: shown in each accompanying drawing, a kind of underlying cam engine pitman arm shaft position structure, comprise by cylinder head cylinder body connecting bolt 3 and lower shake-changing arm axle mounting hole a and be fixed in lower shake-changing arm axle 1 on the cylinder block 4, it is characterized in that: described position structure also comprises lower shake-changing arm axle positioning shaft 2; Wherein said cylinder head cylinder body connecting bolt 3 is connected with described lower shake-changing arm axle positioning shaft 2 upper ends, described lower shake-changing arm axle positioning shaft 2 passes described lower shake-changing arm axle mounting hole a lower shake-changing arm axle 1 is fixed on the cylinder block 4, and lower shake-changing arm axle positioning shaft 2 lower ends are positioned on the cylinder block 4; Described lower shake-changing arm axle positioning shaft 2 upper and lower end all embed in the cylinder block 4, and the lower end is positioned among the cylinder block trough of belt c by locating stud b; Lower shake-changing arm axle positioning shaft 2 described in the figure is to be positioned among the cylinder block trough of belt c by the locating stud b that a horizontal length is longer than lower shake-changing arm axle positioning shaft 2 diameters; Described lower shake-changing arm axle positioning shaft 2 is connected for interference fit with described cylinder block 4.
Owing to adopt CG underlying cam lower shake-changing arm axle allocation mechanism of the present utility model, lower shake-changing arm axle positioning shaft 2 can be press fit on the cylinder block 4 by the slight interference cooperation, thereby noise and seal ring 6 wearing and tearing that lower shake-changing arm axle 1 axial float brings have been prevented, be connected on the lower shake-changing arm axle positioning shaft 2 owing to cylinder head cylinder body connecting bolt 3 simultaneously, therefore the lower shake-changing arm axle mounting hole a place of cylinder block is not connected the influence of pulling force, thereby lower shake-changing arm axle 1 play when lower shake-changing arm 5 high-speed motions that has solved the prior art existence effectively causes the noise increase of motor and the problem of seal ring 6 leakage of oils too greatly.
Claims (4)
1. underlying cam engine pitman arm shaft position structure, comprise by cylinder head cylinder body connecting bolt (3) and lower shake-changing arm axle mounting hole (a) and be fixed in lower shake-changing arm axle (1) on the cylinder block (4), it is characterized in that: described position structure also comprises lower shake-changing arm axle positioning shaft (2); Wherein said cylinder head cylinder body connecting bolt (3) is connected with described lower shake-changing arm axle positioning shaft (2) upper end, described lower shake-changing arm axle positioning shaft (2) passes described lower shake-changing arm axle mounting hole (a) lower shake-changing arm axle (1) is fixed on the cylinder block (4), and lower shake-changing arm axle positioning shaft (2) lower end is positioned on the cylinder block (4).
2. underlying cam engine pitman arm shaft position structure as claimed in claim 1 is characterized in that: described lower shake-changing arm axle positioning shaft (2) upper and lower end all embeds in the cylinder block (4), and the lower end is positioned in the cylinder block trough of belt (c) by locating stud (b).
3. underlying cam engine pitman arm shaft position structure as claimed in claim 2 is characterized in that: described lower shake-changing arm axle positioning shaft (2) is to be positioned in the cylinder block trough of belt (c) by the locating stud (b) that a horizontal length is longer than lower shake-changing arm axle positioning shaft (2) diameter.
4. as claim 1,2 or 3 described underlying cam engine pitman arm shaft position structures, it is characterized in that: described lower shake-changing arm axle positioning shaft (2) is connected for interference fit with described cylinder block (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202071222U CN201560814U (en) | 2009-11-13 | 2009-11-13 | Positioning structure of rocker arm shaft for underneath cam type engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202071222U CN201560814U (en) | 2009-11-13 | 2009-11-13 | Positioning structure of rocker arm shaft for underneath cam type engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201560814U true CN201560814U (en) | 2010-08-25 |
Family
ID=42625961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202071222U Expired - Lifetime CN201560814U (en) | 2009-11-13 | 2009-11-13 | Positioning structure of rocker arm shaft for underneath cam type engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201560814U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806315A (en) * | 2015-03-27 | 2015-07-29 | 中国北方发动机研究所(天津) | Novel positioning mechanism for air feeding rocker arm shaft |
| CN113685285A (en) * | 2021-08-26 | 2021-11-23 | 中原内配集团安徽有限责任公司 | Cast-in cylinder sleeve with middle milled hole |
-
2009
- 2009-11-13 CN CN2009202071222U patent/CN201560814U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806315A (en) * | 2015-03-27 | 2015-07-29 | 中国北方发动机研究所(天津) | Novel positioning mechanism for air feeding rocker arm shaft |
| CN113685285A (en) * | 2021-08-26 | 2021-11-23 | 中原内配集团安徽有限责任公司 | Cast-in cylinder sleeve with middle milled hole |
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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: 20100825 |
|
| CX01 | Expiry of patent term |