CN204140150U - Hydraulic tappet - Google Patents
Hydraulic tappet Download PDFInfo
- Publication number
- CN204140150U CN204140150U CN201420493649.7U CN201420493649U CN204140150U CN 204140150 U CN204140150 U CN 204140150U CN 201420493649 U CN201420493649 U CN 201420493649U CN 204140150 U CN204140150 U CN 204140150U
- Authority
- CN
- China
- Prior art keywords
- housing
- noumenon
- hydraulic tappet
- oil
- oil duct
- 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
Links
- 229920001971 elastomer Polymers 0.000 claims description 25
- 239000012530 fluid Substances 0.000 claims description 18
- 210000004907 gland Anatomy 0.000 claims description 14
- 239000000806 elastomer Substances 0.000 claims description 12
- 239000003921 oil Substances 0.000 abstract description 93
- 239000010705 motor oil Substances 0.000 abstract description 11
- 239000010721 machine oil Substances 0.000 abstract description 6
- 238000005461 lubrication Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The utility model relates to a kind of hydraulic tappet, comprise housing, also comprise the plunger body be made up of the first noumenon and the second body, the first noumenon is located in housing, two ends in the first noumenon in housing are equipped with oil pocket, the first noumenon is provided with the oil duct be communicated with between the oil pocket of two ends, and oil pocket internal pressure in upper end can carry out the throttle mechanism of shutoff when increasing to oil duct, the external diameter of the second body is less than the first noumenon, one end and the first noumenon of the second body are connected, and the other end of the second body stretches out by housing; And be located at the second body and stretch out elastic supporting mechanism between one end outside housing and housing, the second described body pushes in the elastic top of elastic supporting mechanism, have relative housing overhanging, with the motion making the second body increase relative to the overhang of housing.This hydraulic tappet can not utilize engine lubrication system machine oil and can realize self function, thus can avoid the various drawbacks that utilize engine motor oil work to produce, has good practicability.
Description
Technical field
The utility model relates to a kind of engine component, particularly relates to a kind of hydraulic tappet.
Background technique
If between engine valve and driving component thereof in the cold state gapless or gap too small, then when engine operation, due to the expanded by heating of valve and driving component thereof, it often causes valve-closing not tight, and then engine compresses and working stroke gas leakage can be caused and engine power is declined, motor even can be caused time serious not start or valve and piston clash into.Solve the method that valve is not closed completely because of thermal expansion in prior art and normally adopt reserved valve clearance, but due to the existence of valve clearance, motor operationally can produce the problem such as impulsive load and mechanicalness noise again.In order to solve above-mentioned contradiction, people have employed hydraulic tappet in engine air valve device, hydraulic tappet can utilize the engine motor oil with certain pressure to regulate the length of self, with the length change that the component compensated in valve mechanism produce due to thermal expansion, wearing and tearing and foozle etc., thus the object automatically eliminating valve clearance can be reached.
The hydraulic tappet adopted in existing engine air valve device all needs to use the machine oil of engine oil gallery to realize himself function, for ensureing that machine oil has good mobility in hydraulic tappet, often require periodic replacement engine motor oil, to increase the oil exchange frequency, ensure engine oil quality.And to set up due to motor oil pressure when cold starting and have certain delay, now valve impingement phenomenon may be caused to occur because of hydraulic tappet cisco unity malfunction, stop using all the more so afterwards for a long time at automobile.This is external when reequiping to increase hydraulic tappet to older models, because hydraulic tappet need be connected with engine oil gallery, it also makes engine cylinder cover need to redesign processing to increase oil duct, and increasing along with oil duct, possible engine oil dew point also can increase, and this often needs again to increase machine oil pump delivery to maintain required pressure in oil duct.
Model utility content
For solving the deficiencies in the prior art, the utility model provides a kind of hydraulic tappet, it can not utilize engine lubrication system machine oil and can realize self function, thus can avoid the various drawbacks that utilize engine motor oil work to produce, has good practicability.
For achieving the above object, hydraulic tappet of the present utility model comprises housing, also comprises:
Plunger body, be made up of the first noumenon and the second body, described the first noumenon is located in housing, two ends in the first noumenon in housing are equipped with oil pocket, the first noumenon is provided with the oil duct be communicated with between the oil pocket of two ends, and can carries out the throttle mechanism of shutoff to described oil duct when the oil pocket internal pressure in upper end increases, the external diameter of described second body is less than the first noumenon, one end and the first noumenon of described second body are connected, and the other end of the second body stretches out by housing;
Elastic supporting mechanism, be located at the second body and stretch out between one end outside housing and described housing, the second described body pushes in the elastic top of elastic supporting mechanism, have relative housing overhanging, with the motion making the second body increase relative to the overhang of housing.
Adopt above-mentioned technological scheme, be installed in valve mechanism when making hydraulic tappet, when valve mechanism works, open along with cam rotary actuation hydraulic tappet declines to promote valve fast, now the oil pocket of upper end is because of the pressure increase by the extruding between housing and the first noumenon, therefore throttle mechanism also carries out shutoff to the oil duct being communicated with upper and lower end oil pocket, due to the incompressibility of fluid, just make to become between housing and plunger body to be rigidly connected, hydraulic tappet also just can promote valve and open under the driving of cam.And when valve-closing, along with cam rotates, between hydraulic tappet and cam, have the trend of disengaging, pressure in the oil pocket of now upper end can reduce, thus make the plugging action of throttle mechanism to oil duct not obvious, upper and lower end oil pocket just can be communicated with via oil duct, to regulate the volume of upper and lower end oil pocket.
If when having gap between valve mechanism, under the effect of elastic supporting mechanism, one end that second body stretches out outside housing to it relative to housing is moved, the oil pocket volume of lower end diminishes, fluid in the oil pocket of lower end flows in the oil pocket of upper end, thus makes hydraulic tappet entire length elongated to eliminate the gap that valve mechanism exists.
If valve mechanism is elongated because of expanded by heating after work, now when the basic circle section of cam connects with hydraulic tappet, valve should be closed and can not close, active force due to valve spring is greater than the active force of elastic supporting mechanism, thus valve can make the pressure in the oil pocket of upper end larger to the pushing tow of the second body, this pressure makes the plugging action of throttle mechanism not obvious, pressure reduction is formed again between upper and lower end oil pocket, simultaneously endurance of connecting with hydraulic tappet of the basic circle section of cam is also longer, thus the fluid in the oil pocket of upper end can be made to flow in the oil pocket of lower end, hydraulic tappet entire length is made to diminish thus, ensure that the normal work of valve mechanism.
This hydraulic tappet utilizes self structure not need to be connected with in-engine lubricating oil path just to realize eliminating the function in valve mechanism gap, thus also just avoids the various drawbacks utilizing engine motor oil work to produce, has good practicability.
As the restriction to aforesaid way, described throttle mechanism be connect cover on the first noumenon upper-end surface and and there is between the upper-end surface of the first noumenon the diaphragm of fluid flow clearance, the oil duct junction of described oil duct in the first noumenon upper end surface is positioned at the coverage area of diaphragm.Use diaphragm structure is simple and reliable, can when upper end oil pocket pressure increase, the plugging action needed for producing oil duct junction.
As the restriction to aforesaid way, the oil duct junction of described oil duct in the first noumenon upper end surface is positioned at the center of diaphragm.Make oil duct junction be positioned at its center place and can ensure that diaphragm produces good plugging action to oil duct junction when upper end oil pocket pressure increase.
As the restriction to aforesaid way, described elastic supporting mechanism comprises the spring seat on the second body of being fixed on and stretching out outside housing, and to be located between described spring seat and housing and the spring be sleeved on the second body.Spring structure is simple, is convenient to arrange.
As the restriction to aforesaid way, between described spring and housing, be provided with the second spring seat be set on the second body.The layout that second spring seat can be convenient between spring and hydraulic tappet housing is set, can ensures that spring is in good working order.
As the restriction to aforesaid way, the second body on the housing stretches out place and is provided with the elastomer block connected of sliding with described second body along all sides of the second body, between described elastomer block and the second body, be provided with stuffing box gland.Elastomer block is set when can be heated at hydraulic tappet and make the fluid volumetric expansion in it, because elastomer block has certain elastic deformation amount, the volumetric expansion of fluid is accepted, thus can ensure that the fluid in hydraulic tappet does not leak because being heated.
As the restriction to aforesaid way, described elastomer block is block rubber.Block rubber can meet generation resiliently deformable to accept the needs of fluid expanding volume, and its cost is lower, is convenient to the setting on hydraulic tappet.
As the restriction to aforesaid way, the annular protrusion abutted against with the end face of described stuffing box gland together with being provided with at least on the second body and stuffing box gland slide the periphery wall that connects.Arrange annular protrusion can make to be partially formed gapless structure between the second body and stuffing box gland, can sealing effect be ensured.
As the restriction to aforesaid way, be provided with a spheroid in the center in described housing tip face.Spheroid is set and can changes contact form between cam and hydraulic tappet, to slow down the wearing and tearing between cam and hydraulic tappet.
As the restriction to aforesaid way, be provided with oil hole in the center in described housing tip face, described spheroid is located in oil hole.Make spheroid be placed in oil hole and also can make the closed simple and reliable of oil hole.
In sum, adopt the technical solution of the utility model, engine lubrication system machine oil can not be utilized and self function can be realized, thus the various drawbacks that utilize engine motor oil work to produce can be avoided, there is good practicability.
Accompanying drawing explanation
Do further to describe in detail to the utility model below in conjunction with the drawings and the specific embodiments:
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the partial enlarged drawing of part A in Fig. 1;
Fig. 3 is the partial enlarged drawing of part B in Fig. 1;
Fig. 4 is the structural representation of hydraulic tappet when being installed on valve mechanism;
In figure: 1, housing; 2, the first noumenon; 3, the second body; 4, upper end oil pocket; 5, lower end oil pocket; 6, oil duct; 7, diaphragm; 8, spring seat; 9, spring; 10, the second spring seat; 11, cam; 12, camshaft; 13, valve; 14, valve spring; 15, cotter seat; 16, block rubber; 17, contiguous block; 18, stuffing box gland; 19, annular protrusion; 20, steel ball.
Embodiment
The present embodiment relates to a kind of hydraulic tappet, and as shown in Figure 1 to Figure 3, it comprises housing 1, be located at the first noumenon 2 in housing 1, and one end is connected with the first noumenon 2, the other end is by the second body 3 stretched out in housing 1, and the first noumenon 2 and the second body 3 constitute plunger body.In housing 1, be equipped with oil pocket in the two ends of the first noumenon 2, for ease of describing, the oil pocket at two ends is called upper end oil pocket 4 and lower end oil pocket 5.The first noumenon 2 is provided with the oil duct 6 be communicated with between upper end oil pocket 4 and lower end oil pocket 5, and the throttle mechanism of shutoff can be carried out when upper end oil pocket 4 internal pressure increases to oil duct 6.Stretch out between one end outside housing 1 and housing 1 at the second body 3 and be also provided with elastic supporting mechanism, the second body 3 pushes in the elastic top of elastic supporting mechanism, have relative housing 1 overhanging, with the motion making the second body 3 increase relative to the overhang of housing 1.
In the present embodiment, the external diameter of the first noumenon 2 is slightly less than the internal diameter of housing 1, to make the first noumenon 2 can be free to slide in housing 1, but can ensure the isolation effect to upper and lower end oil pocket.The external diameter of the second body 3 is less than the first noumenon 2, is formed lower end oil pocket 5 well to enclose between interior edge face bottom the first noumenon 2 and housing 1.Upper end oil pocket 4 and lower end oil pocket 5 are positioned at the two ends of the first noumenon 2, and oil duct 6 and throttle mechanism are also located on the first noumenon 2.In the present embodiment, throttle mechanism is the diaphragm 7 being covered in the first noumenon 2 upper end surface, and namely the oil duct junction of oil duct 6 on the first noumenon 2 upper-end surface be positioned at the coverage area of diaphragm 7.Diaphragm 7 can be made by having certain flexible stalloy, its profile is the circle being less than the first noumenon 2 external diameter, and two places centrosymmetric relative to diaphragm 7 that diaphragm 7 can be via being positioned at its edge are welded on the end face of the first noumenon 2, between the end face of welding rear film 7 and the first noumenon 2, there is certain gap, can communicate with oil duct 6 to make upper end oil pocket 4.Certain diaphragm 7 also can be other and has certain flexible metal or nonmetallic material except can be stalloy, and the link position between itself and the first noumenon 2 also can be other offset position of diaphragm 7.
The plugging effect of the oil duct junction of diaphragm 7 pairs of oil ducts 6 time in the present embodiment for ensureing pressure increase in upper end oil pocket 4, the oil duct junction that oil duct 6 is positioned at the first noumenon 2 upper end surface is set to be positioned at the center of diaphragm 7.Elastic supporting mechanism in the present embodiment then comprises and is arranged on the spring seat 8 that the second body 3 stretches out one end place outside housing 1, and to be arranged between spring seat 8 and housing 1 and the spring 9 be sleeved on the second body 3, and for the ease of the layout between spring 9 and housing 1, can better work to make spring 9, between spring 9 and housing 1, be also provided with the second spring seat 10 be sleeved on the second body 3, spring 9 connects with housing 1 via the second spring seat 10.
For preventing fluid in upper end oil pocket 4, lower end oil pocket 5 and oil duct 6 when hydraulic tappet is heated in the present embodiment, easily leak because of fluid volumetric expansion, all sides along the second body 3 on the end face that the second body 3 of housing 1 stretches out also are provided with elastomer block.Elastomer block when fluid expanded by heating volume increases, can be accepted the volume that fluid increases with the elastic strain of himself, so just can prevent fluid from expanding and cause leakage.Elastomer block can be the block rubber 16 shown in Fig. 3, and certainly except can be block rubber 16, elastomer block also can be the material that other have certain elastic deformability.In the present embodiment, block rubber 16 is be connected with the contiguous block 17 be positioned at outside it, and then is connected to via contiguous block 17 on the inner circumferential end face of sidewall of housing 1.The metal that contiguous block 17 can be material identical with housing 1 is made, can be fixed together via high temperature vulcanized between contiguous block 17 and block rubber 16, and can be thread seal between contiguous block 17 with housing 1 sidewall and be connected, so also can realize the first noumenon 2 and the installation in housing 1.
For ensureing the sealing effect between the second body 3 and block rubber 16 when the relative housing 1 of plunger body carries out relative sliding in the present embodiment, on block rubber 16 and the second body 3 slide the end face that connects, be also provided with stuffing box gland 18, thus can prevented by the cooperation between stuffing box gland 18 and the second body 3 fluid of housing 1 inside from leaking.Come in contact for preventing the second spring seat 10 and the second body 3 and the slip of the second body 3 is impacted, also at block rubber 16, the part of the second body 3 is provided with the projection along the second body 3 axial direction in the present embodiment, namely second spring seat 10 is sleeved on the periphery wall of block rubber 16 projection, and stuffing box gland 18 also according to block rubber 16 and the second body 3 slide the end face connected change and do adaptive length change.
In order to increase the sealing effect between the second body 3 and stuffing box gland 18 further, annular protrusion 19 together with being provided with at least on the second body 3 and stuffing box gland 18 slide the periphery wall that connects in the present embodiment, the cross section of annular protrusion 19 is semicircle, it can be the twice being set to as shown in Figure 3 keep at a certain distance away, certain annular protrusion 19 also can be set to as together, other quantity such as three roads.Annular protrusion 19 can make to be partially formed gapless structure between the second body 3 and stuffing box gland 18, realizes the increase of sealing effect with this.Be when hydraulic tappet works on the other hand, slow down the wearing and tearing between housing 1 top end and cam, the center that also can connect with cam at the top end of housing 1 in the present embodiment is provided with a spheroid, spheroid can be the steel ball 20 be arranged on as shown in Figure 2 on housing 1 top end, and when on the top end oil hole of housing 1 being arranged on housing 1, oil hole can be the center being arranged on housing 1 top end, now steel ball 20 can be fitted in oil hole after oiling, and the closed of oil hole also can be made thus to become simple and reliable.
This hydraulic tappet is installed on structure in valve mechanism as shown in Figure 4, and now the top end of the housing 1 of hydraulic tappet and cam 11 abut against, and cam 11 drives can apply downward driving force to housing 1 via camshaft 12.The top of the valve 13 that the second body 3 stretches out in one end of housing 1 and valve mechanism abuts against, and valve 13 is provided with cotter seat 15, is provided with the valve spring 14 be sleeved on outside valve 13 between cotter seat 15 and not shown cylinder head.One end that in the present embodiment, the second body 3 and valve 13 abut against can be designed to the various structures such as plane, sphere form, to adapt to the structural requirement of the valve 13 coordinated with it.
This hydraulic tappet in use, in valve mechanism work, open along with cam 11 rotary actuation hydraulic tappet declines to promote valve 13 fast, now upper end oil pocket 4 is because of the pressure increase by the extruding between housing 1 and the first noumenon 2, therefore diaphragm 7 also carries out shutoff to the oil duct junction of oil duct 6, due to the incompressibility of fluid, just make to become between housing 1 and plunger body to be rigidly connected, hydraulic tappet also just can promote valve 13 and open under the driving of cam 11.And when valve 13 is closed, along with cam 11 rotates, the trend of disengaging is had between hydraulic tappet and cam 11, pressure now in upper end oil pocket 4 can reduce, thus make the plugging action of diaphragm 7 pairs of oil ducts 6 not obvious, upper end oil pocket 4 and lower end oil pocket 5 just can be communicated with via oil duct 6, to regulate the volume of two oil pockets.
If when having gap between valve mechanism, under the effect of spring 9, one end that second body 3 drives the first noumenon 2 to stretch out outside housing 1 to the second body 3 relative to housing 1 is together moved, lower end oil pocket 5 volume diminishes, fluid in lower end oil pocket 5 flows in upper end oil pocket 4, thus makes hydraulic tappet entire length elongated to eliminate the gap that valve mechanism exists.
If valve mechanism is elongated because of expanded by heating after work, now when the basic circle section of cam 11 connects with housing 1, valve 13 should be closed and can not close, active force due to valve spring 14 is greater than the active force of spring 9, thus the pushing tow of valve 13 to the second body 3 can make the pressure in upper end oil pocket 4 larger, this pressure makes the plugging action of diaphragm 7 pairs of oil ducts 6 not obvious, pressure reduction is formed again between upper end oil pocket 4 and lower end oil pocket 5, simultaneously endurance of connecting with housing 1 of the basic circle section of cam 11 is also longer, thus the fluid in upper end oil pocket 4 can be made to flow in lower end oil pocket 5, hydraulic tappet entire length is made to diminish thus, ensure that the normal work of valve mechanism.
Claims (10)
1. a hydraulic tappet, comprises housing, characterized by further comprising:
Plunger body, be made up of the first noumenon and the second body, described the first noumenon is located in housing, two ends in the first noumenon in housing are equipped with oil pocket, the first noumenon is provided with the oil duct be communicated with between the oil pocket of two ends, and can carries out the throttle mechanism of shutoff to described oil duct when the oil pocket internal pressure in upper end increases, the external diameter of described second body is less than the first noumenon, one end and the first noumenon of described second body are connected, and the other end of the second body stretches out by housing;
Elastic supporting mechanism, be located at the second body and stretch out between one end outside housing and described housing, the second described body pushes in the elastic top of elastic supporting mechanism, have relative housing overhanging, with the motion making the second body increase relative to the overhang of housing.
2. hydraulic tappet according to claim 1, it is characterized in that: described throttle mechanism be connect cover on the first noumenon upper-end surface and and there is between the upper-end surface of the first noumenon the diaphragm of fluid flow clearance, the oil duct junction of described oil duct in the first noumenon upper end surface is positioned at the coverage area of diaphragm.
3. hydraulic tappet according to claim 2, is characterized in that: the oil duct junction of described oil duct in the first noumenon upper end surface is positioned at the center of diaphragm.
4. hydraulic tappet according to claim 1, is characterized in that: described elastic supporting mechanism comprises the spring seat on the second body of being fixed on and stretching out outside housing, and to be located between described spring seat and housing and the spring be sleeved on the second body.
5. hydraulic tappet according to claim 4, is characterized in that: between described spring and housing, be provided with the second spring seat be set on the second body.
6. hydraulic tappet according to claim 1, is characterized in that: the second body on the housing stretches out place and is provided with the elastomer block connected of sliding with described second body along all sides of the second body, between described elastomer block and the second body, be provided with stuffing box gland.
7. hydraulic tappet according to claim 6, is characterized in that: described elastomer block is block rubber.
8. hydraulic tappet according to claim 6, is characterized in that: the annular protrusion abutted against with the end face of described stuffing box gland together with being provided with at least on the second body and stuffing box gland slide the periphery wall that connects.
9. hydraulic tappet according to any one of claim 1 to 8, is characterized in that: be provided with a spheroid in the center in described housing tip face.
10. hydraulic tappet according to claim 9, is characterized in that: be provided with oil hole in the center in described housing tip face, described spheroid is located in oil hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420493649.7U CN204140150U (en) | 2014-08-29 | 2014-08-29 | Hydraulic tappet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420493649.7U CN204140150U (en) | 2014-08-29 | 2014-08-29 | Hydraulic tappet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204140150U true CN204140150U (en) | 2015-02-04 |
Family
ID=52416843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420493649.7U Expired - Fee Related CN204140150U (en) | 2014-08-29 | 2014-08-29 | Hydraulic tappet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204140150U (en) |
-
2014
- 2014-08-29 CN CN201420493649.7U patent/CN204140150U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 |