CN2693955Y - Valve rockerarm mechanism of gasoline engine - Google Patents
Valve rockerarm mechanism of gasoline engine Download PDFInfo
- Publication number
- CN2693955Y CN2693955Y CN 200420034413 CN200420034413U CN2693955Y CN 2693955 Y CN2693955 Y CN 2693955Y CN 200420034413 CN200420034413 CN 200420034413 CN 200420034413 U CN200420034413 U CN 200420034413U CN 2693955 Y CN2693955 Y CN 2693955Y
- Authority
- CN
- China
- Prior art keywords
- valve
- guide block
- valve rocker
- nut
- gasoline engine
- 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 - Fee Related
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- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The utility model relates to a valve rocker mechanism of gasoline engine which is composed of a regulating screw 1, a regulating screw fixed nut 2, a valve rocker 3, a guide block 4, a clearance regulating nut 5, a locking nut 6 and a feather key 7. The lower part pf the valve rocker is groove shape. The valve rocker mechanism of gasoline engine is characterized in that a rectangular guide block 4 is fixedly sleeved on the middle section of the regulating screw 1. The cambered surface of the bottom of the guide block 4 is inosculated with the cambered surface of the inner wall of the concave groove of the valve rocker 3 and the guide block 4 is fallen in the concave groove of the valve rocker 3. A valve clearance regulating nut 5 is equipped above the guide block 4. The valve rocker mechanism of gasoline engine can effectively guarantee that the valve rocker does the directional swinging according to the motion law (make the air inlet valve and the air exhaust valve be opened and closed on time according to the distributing phase requirement) in the situation that the valve push rod support is cancelled and the noise caused by the valve push rod and the support rubbing is eliminated. The valve rocker mechanism of gasoline engine is provided with well running and reliable operation.
Description
One, technical field:
The utility model relates to a kind of petrol engine accessory, especially a kind of small size universal petrol engine valve swing arm mechanism.
Two, prior art:
At present, the valve rocker operation mechanism of domestic use on small utility gasoline engine is that Japanese honda company produces, on structure, this mechanism adjusts bolt by the valve clearance and passes the pitman arm shaft seat pin, pass valve rocker again and be fixed on the cylinder head, above the pitman arm shaft seat pin, lock with locking nut.Because designed valve rocker bottom is spherical shape, pitman arm shaft seat pin bottom also is a spherical shape, therefore, and can be during valve rocker work around the bottom spherical motion of pitman arm shaft seat pin.Its degrees of freedom is big.Valve rocker both can move up and down at work, can swing again, and therefore, it can not guarantee that valve rocker does directional swing by its characteristics of motion.The valve actuating push rod that is positioned at valve rocker one end below can break away from the sphere nest hole of rocking arm one end because of swinging of valve rocker, causes petrol engine to quit work.In order to prevent that valve actuating push rod from cheating from valve rocker sphere nest, Japanese honda company has added valve actuating push rod support (this erects the valve actuating push rod leading role) below the adjusting screw set screw nut, make its rocking arm do directional swing by required rule.But this structure can cause valve actuating push rod and support to rub, and produces noise, and this surface friction drag also can influence the switching time of valve, directly influences the power of petrol engine.
Three, summary of the invention:
Order of the present utility model provides a kind of petrol engine valve swing arm mechanism, solves existing apneustic pusher bar support in the prior art, and valve actuating push rod can be deviate from and push rod and support friction-produced noise, influences the problem of power.
Concrete scheme of the present utility model is: a kind of petrol engine valve swing arm mechanism, adjusting screw is passed the bottom and is the valve rocker of groove, the below of valve rocker is equipped with the adjusting screw set screw nut, the upper end of adjusting screw is equipped with locking nut, it is characterized in that: described adjusting screw middle part is installed with the cuboid guide block, this guide block bottom cambered surface and valve rocker groove inwall cambered surface are coincide, and fall into the groove of valve rocker, be provided with the valve clearance and adjust nut above guide block.
The utility model is band curved working face groove with the bottom design of valve rocker, and substitute original cylindrical body pitman arm shaft seat pin with the cuboid guide block, guide block bottom design camber working surface, changing original spherical motion is the cambered surface motion, like this when valve rocker is worked, the flute profile cambered surface of valve rocker is worked around valve guide block arc surface, work near plane, valve guide block both sides simultaneously in plane, both sides, valve rocker bottom, the degrees of freedom that its former valve rocking arm swings just is restricted, valve rocker is done orientation movement, valve actuating push rod just can not deviate from, thereby has cancelled the pusher bar support of original structure, has reached the purpose of this utility model.
Adopt the advantage of such scheme to be: after cancellation valve actuating push rod support, can guarantee effectively that valve rocker does directional swing (making the inlet and outlet door by the punctual switching of port timing requirements) by its characteristics of motion; Simultaneously, eliminated the noise that produces because of friction between valve actuating push rod and the support, petrol engine power is protected.Reliable operation is worked well through the installation test run in this mechanism.
Four, description of drawings:
Fig. 1 is a plan view of the present utility model;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is that the utility model is installed in the user mode figure in the petrol engine.
Five, embodiment:
Please see Figure 1, Fig. 2, the utility model is mainly by adjusting screw 1, adjusting screw set screw nut 2, valve rocker 3, guide block 4, clearance adjusting nut 5, locking nut 6, feather key 7 is formed, be the valve rocker 3 of groove bottom wherein adjusting screw 1 is passed, the below of valve rocker 3 is equipped with adjusting screw set screw nut 2, the upper end of adjusting screw 1 is equipped with locking nut 6, it is characterized in that: described adjusting screw 1 middle part is installed with cuboid guide block 4, these guide block 4 bottom cambered surfaces and valve rocker 3 groove inwall cambered surfaces are coincide, and fall into the groove of valve rocker 3, above guide block 4, be provided with the valve clearance and adjust nut 5.The utility model is installed on the cylinder head 13 of petrol engine.
Adjusting screw described in the utility model 1 two is a screw rod, and the middle part is a cylindrical shape; Be provided with feather key 7 at cylindrical section; Have guiding groove in described guide block 4 through holes, this guiding groove cooperates installation with feather key 7 on the adjusting screw 1.
Can further see from Fig. 1: it is cylindrical for the lower end that aforementioned gap is adjusted nut 5, and the upper end is orthohexagonal nut structure, and it is between guide block 4 and locking nut 6, and the cylinder of clearance adjusting nut 5 lower ends stretches in the guide block 4.
Can further understand working condition of the present utility model from Fig. 3: the utility model is installed on the cylinder head of petrol engine, and valve rocker 3 one ends contact with valve actuating push rod 9, and the other end contacts with valve 10 afterbodys.When camshaft gear wheel 12 rotated, tappet 8 drove valve actuating push rod 9 and moves up and down, thereby valve rocker 3 both wings are swung up and down.When valve actuating push rod 9 upwards promotes, valve rocker 3 the other ends calm the anger downwards the door 10 afterbodys, open valve; When valve actuating push rod 9 moved down, valve rocker 3 the other ends were tilted upward, and valve is closed under the valve spring effect.The utility model has effectively avoided valve rocker 3 to swing around adjusting screw 1 owing to adopted the bottom to be the cuboid guide block 4 of cambered surface, and the original degrees of freedom of rocking arm is restricted, thereby guarantees that petrol engine inlet and outlet door opens and closes on request on time.
Claims (3)
1. petrol engine valve swing arm mechanism, adjusting screw (1) is passed the bottom and is the valve rocker of groove (3), the below of valve rocker (3) is equipped with adjusting screw set screw nut (2), the upper end of adjusting screw (1) is equipped with locking nut (6), it is characterized in that: described adjusting screw (1) middle part is set with cuboid guide block (4), this guide block (4) bottom cambered surface and valve rocker (3) groove inwall cambered surface are coincide, and fall into the groove of valve rocker (3), be provided with the valve clearance in guide block (4) top and adjust nut (5).
2. petrol engine valve swing arm according to claim 1 mechanism, it is characterized in that: described adjusting screw (1) two is a screw rod, and the middle part is a cylindrical shape; Be provided with feather key (7) at cylindrical section; Have guiding groove in described guide block (4) through hole, this guiding groove cooperates installation with feather key (7) on the adjusting screw (1).
3. petrol engine valve swing arm according to claim 1 and 2 mechanism is characterized in that: it is cylindrical for the lower end that nut (5) is adjusted in described valve clearance, and the upper end is orthohexagonal nut structure, and it is positioned between guide block (4) and the locking nut (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420034413 CN2693955Y (en) | 2004-04-16 | 2004-04-16 | Valve rockerarm mechanism of gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420034413 CN2693955Y (en) | 2004-04-16 | 2004-04-16 | Valve rockerarm mechanism of gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2693955Y true CN2693955Y (en) | 2005-04-20 |
Family
ID=34773003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420034413 Expired - Fee Related CN2693955Y (en) | 2004-04-16 | 2004-04-16 | Valve rockerarm mechanism of gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2693955Y (en) |
-
2004
- 2004-04-16 CN CN 200420034413 patent/CN2693955Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: LIFAN INDUSTRIAL (GROUP) CO. Free format text: FORMER NAME OR ADDRESS: CHONGQING LIFAN INDUSTRY ( GROUP ) CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Chongqing city Shapingba District zhangjiewan Bridge No. 60, zip code: 400037 Patentee after: Lifan Industry (Group) Co., Ltd. Address before: Chongqing city Shapingba District zhangjiewan Bridge No. 60, zip code: 400037 Patentee before: Chongqing Lifan Industrial (Group) Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050420 |