CN203383868U - Hydraulic tappet type zero clearance air distributing device for air valve - Google Patents
Hydraulic tappet type zero clearance air distributing device for air valve Download PDFInfo
- Publication number
- CN203383868U CN203383868U CN201320446099.9U CN201320446099U CN203383868U CN 203383868 U CN203383868 U CN 203383868U CN 201320446099 U CN201320446099 U CN 201320446099U CN 203383868 U CN203383868 U CN 203383868U
- Authority
- CN
- China
- Prior art keywords
- hydraulic tappet
- plunger
- push rod
- valve
- 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 - Fee Related
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- 230000007774 longterm Effects 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract 1
- 239000010687 lubricating oil Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 239000012530 fluid Substances 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
Images
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- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The utility model relates to a hydraulic tappet type zero clearance air distributing device for an air valve. The hydraulic tappet type zero clearance air distributing device comprises a rocker arm, a push rod and the air valve, wherein a shaft hole is formed in the rocker arm; the hydraulic tappet type zero clearance air distributing device is characterized in that a hydraulic tappet is arranged between the rocker arm and the push rod; the upper part of the hydraulic tappet is mounted inside the concave hole of the rocker arm; the lower part of the hydraulic tappet is in contact with the top of the push rod; a lubricating oil channel is arranged between the concave hole and the shaft hole; the hydraulic tappet comprises a casing; a freely-stretched plunger is arranged inside the casing; the interior of the plunger is a low-pressure cavity; a high-pressure cavity is arranged between the plunger and the casing; a one-way valve is arranged between the low-pressure cavity and the high-pressure cavity. The hydraulic tappet type zero clearance air distributing device for the air valve has the benefits as follows: as a conventional rocker arm bolt is replaced with the hydraulic tappet, the purposes of automatically adjusting air valve clearance (zero clearance) and lowering noise are achieved; after an air distributing mechanism is worn after long-term operation, due to free stretching of the plunger and compensation action of the journey, the abrasion clearance generated by the air distributing mechanism can be recovered automatically. Therefore, the engine is not required to be turn on, and the trouble and inconvenience brought by frequently adjusting the air valve clearance are eliminated.
Description
Technical field
The utility model relates to a kind of distribution device of motor car engine.
Background technique
The available engine distribution device mainly comprises rocking arm screw, rocking arm, push rod, valve and valve spring etc., and to be rocking arm rotated around self axis hole in action, back and forth oppresses valve, and effect is to open and close on time valve, valve timing.
For the consideration of motor heat expansion shrinkage, when the cold machine assembling of distribution device, leave certain interval between rocking arm and valve, so that distribution device part expanded by heating.
There is several respects shortcoming in existing above-mentioned mounting type:
1. motor need to check valve clearance when assembling, adjusts rocking arm screw height and makes gap meet the regulation requirement, and assembling is trouble;
2. the every work certain hour of motor is because the distribution device driving parts weares and teares, and gap increases, and surpasses the regulation requirement, need to open motor, again valve clearance is adjusted, very inconvenient;
3. when valve clearance is excessive, during distribution device work, between rocking arm and valve, produce knock, noise, all influential to personnel and environment.
Summary of the invention
The hydraulic tappet formula gapless air gate distribution device that the purpose of this utility model is intended to provide a kind of to be assembled simply, use reliably, exempts to regulate is to make up the deficiency of prior art.
The technical solution adopted in the utility model is: hydraulic tappet formula gapless air gate distribution device, comprise rocking arm, push rod and valve, and axis hole is arranged in rocking arm, it is characterized in that: between rocking arm and push rod, be provided with hydraulic tappet; Hydraulic tappet top is arranged in the shrinkage pool of rocking arm, and the hydraulic tappet bottom contacts with the push rod top; Between shrinkage pool and axis hole, oil leab is arranged.
Optimize: hydraulic tappet comprises housing, and the plunger of free-extension is arranged in housing; In plunger, be low-pressure cavity, the space between plunger and housing is hyperbaric chamber, between low-pressure cavity and hyperbaric chamber, one-way valve is arranged.
Optimize, the surface of contact at hydraulic tappet bottom and push rod top is arc.
The beneficial effects of the utility model are: replaced original rocking arm screw with hydraulic tappet, reached automatic valve gap adjustment (gapless), fallen low noise purpose.After the distribution device long-term work produces wearing and tearing, because of the compensating action of plunger free-extension and stroke thereof, can automatically make up the wearing clearance that distribution device produces, thereby, without opening motor, remove the trouble and inconvenience often valve clearance adjusted from.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of hydraulic tappet.
Embodiment
Embodiment:
This device technique thinking is to cancel former rocking arm screw or other controlling devices, and former rocking arm screw is improved and is designed to hydraulic tappet 3; Design shrinkage pool 2 on Rocker arm 5, be inserted into hydraulic tappet 3 designs in shrinkage pool 2; Push rod 2 is complementary with hydraulic tappet 3.The main composition of this device is: hydraulic tappet 3, the Rocker arm 5 with shrinkage pool 2, push rod 1.
The work prerequisite of hydraulic tappet 3 is to need engine lubrication fluid.For solving hydraulic tappet 3 fuel feeding, between the axis hole 7 of the shrinkage pool 2 of Rocker arm 5 and rocking arm, design connection oil leab 4, when making the oil lubrication rocker shaft hole 4 of motor, enter into hydraulic tappet 3 inside.Hydraulic tappet 3 upper ends are inserted in rocking arm shrinkage pool 2, and lower end contacts with push rod 2.Hydraulic tappet 3 lower ends are designed to bulb, and push rod 1 upper end is designed to the ball impression groove, realize effectively coupling.
The effect of rocking arm shrinkage pool 2 is to install to hold hydraulic tappet 3, guarantees that hydraulic tappet 3 is in the interior free-extension of shrinkage pool 2 and rotation; Another effect is as the intermediary to hydraulic tappet 3 fuel feeding, and the oil leab 4 designed by increase is introduced engine lubrication fluid to be communicated to hydraulic tappet 3 inside.
The core of this device is hydraulic tappet 3.The effect of hydraulic tappet 3 is as a fulcrum of Rocker arm 5 motion, is arranged on push rod 1 upper end.Hydraulic tappet 3, because of its inner structural design, reaches the purpose of automatic valve gap adjustment: hydraulic tappet 3 is mainly by housing 9, plunger 13, and one-way valve 12, check valve spring 11, plunger return spring 10 parts such as grade form.One-way valve 12 designs, in hydraulic tappet 3 interior lower end, are divided into upper and lower two oil pockets by hydraulic tappet 3, and epicoele is low-pressure cavity 14, with engine lubrication system, communicates; Cavity of resorption is the hyperbaric chamber 15 of sealing.When plunger 13 pressurizeds when descending, one-way valve 12 sealings, hyperbaric chamber 15 oil pressure raise, and the fluid be closed releases and flows back to low-pressure cavity 14 from housing 9 and the gap of plunger 13 by the couple apolegamy; When plunger 13 release, plunger 13 is up under the effect of return spring 10, and hyperbaric chamber 15, because volume increases, produces negative pressure, and low-pressure cavity 14 fluid supplement and enter hyperbaric chamber 15.Plunger 13 is at the inner retractable of hydraulic tappet housing 9, and flexible ultimate range is stroke, can make up air distributing device work long hours rear generation wearing and tearing.During plunger 13 full extension, the free height of hydraulic tappet 3 is calculated through strict, meets the dimensional chain relation of air distributing device transmission.
In this device, the working condition of hydraulic tappet 3 is: when cam during at the basic circle state, plunger 13 is subject to the effect of valve spring 6, valve 8 and Rocker arm 5, compressed half left and right of the stroke of plunger 13, now very close to each other between valve 8 and Rocker arm 5, thus distribution device in when assembling without adjusting valve clearance.When cam in lift during the stage, plunger 13 bears thrust load under the effect of Rocker arm 5, the one-way valve 12 of hydraulic tappet 3 is closed, because engine speed is high, plunger 13, by the trace compression, extrudes minute quantity fluid from the matching gap of housing 9 and plunger 13, and at this moment hydraulic tappet 3 can be similar to and be counted as not compressed rigid body, under the support of " rigid body ", the Rocker arm 5 the other end is opened valve simultaneously.In the cam backhaul stage, the thrust load unloading that Rocker arm 5 produces, plunger 13 recovers micro-decrement under return spring 10 effects, valve is closed under valve spring 6 effects, complete a work cycle, reach automatic valve gap adjustment (gapless), fall low noise purpose.After the distribution device long-term work produces wearing and tearing, because of the compensating action of plunger 13 free-extensions and stroke thereof, can automatically make up the wearing clearance that distribution device produces, thereby, without opening motor, remove the trouble and inconvenience often valve clearance adjusted from.
Claims (3)
1. hydraulic tappet formula gapless air gate distribution device, comprise rocking arm, push rod and valve, and axis hole is arranged in rocking arm, it is characterized in that: between rocking arm and push rod, be provided with hydraulic tappet; Hydraulic tappet top is arranged in the shrinkage pool of rocking arm, and the hydraulic tappet bottom contacts with the push rod top; Between shrinkage pool and axis hole, oil leab is arranged.
2. hydraulic tappet formula gapless air gate distribution device according to claim 1, it is characterized in that: hydraulic tappet comprises housing, and the plunger of free-extension is arranged in housing; In plunger, be low-pressure cavity, the space between plunger and housing is hyperbaric chamber, between low-pressure cavity and hyperbaric chamber, one-way valve is arranged.
3. hydraulic tappet formula gapless air gate distribution device according to claim 1 and 2, it is characterized in that: the surface of contact at hydraulic tappet bottom and push rod top is arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320446099.9U CN203383868U (en) | 2013-07-25 | 2013-07-25 | Hydraulic tappet type zero clearance air distributing device for air valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320446099.9U CN203383868U (en) | 2013-07-25 | 2013-07-25 | Hydraulic tappet type zero clearance air distributing device for air valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203383868U true CN203383868U (en) | 2014-01-08 |
Family
ID=49872377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320446099.9U Expired - Fee Related CN203383868U (en) | 2013-07-25 | 2013-07-25 | Hydraulic tappet type zero clearance air distributing device for air valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203383868U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043339A (en) * | 2019-04-10 | 2019-07-23 | 广西玉柴机器股份有限公司 | The hydraulic rocker of non-overhead type valve actuating mechanism engine |
-
2013
- 2013-07-25 CN CN201320446099.9U patent/CN203383868U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043339A (en) * | 2019-04-10 | 2019-07-23 | 广西玉柴机器股份有限公司 | The hydraulic rocker of non-overhead type valve actuating mechanism engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Tang Bin Inventor after: Jin Yihe Inventor after: Yin Linxi Inventor before: Tang Bin Inventor before: Yin Linxi |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: TANG BIN YIN LINXI TO: TANG BIN JIN YIHE YIN LINXI |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 |